CN111561826A - Suspension roasting furnace device and roasting method - Google Patents
Suspension roasting furnace device and roasting method Download PDFInfo
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- CN111561826A CN111561826A CN202010676865.5A CN202010676865A CN111561826A CN 111561826 A CN111561826 A CN 111561826A CN 202010676865 A CN202010676865 A CN 202010676865A CN 111561826 A CN111561826 A CN 111561826A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
- C01F7/444—Apparatus therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0075—Regulation of the charge quantity
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Abstract
A suspension roasting furnace device and a roasting method belong to the technical field of metallurgy. The suspension roasting furnace device comprises a suspension roasting main furnace, a cyclone separator, a pre-settler, an air locking valve and a material returning pipe; the pre-settler comprises an upper box body and a lower cone, and the upper box body is communicated with the lower cone; the gas-solid discharge port of the suspension roasting main furnace is connected with the gas-solid feed port of the upper box body; the gas-solid discharge port of the upper box body is connected with the gas-solid feed port of the cyclone separator; the discharge port of the lower cone is connected with the feed inlet of the air locking valve, and the discharge port of the air locking valve is connected with the feed inlet at the bottom of the main suspension roasting furnace through a material returning pipe. The suspension roasting furnace has the advantages that the concentration of materials in the suspension roasting furnace is increased by arranging the secondary roasting of unqualified materials, so that the capacity of a roasting high-temperature area is increased, the thermal strength of the unit volume of the suspension roasting furnace is improved, the retention time of the unqualified materials in the suspension roasting furnace is prolonged, the roasting temperature is reduced, the energy consumption is reduced, the product ignition loss is reduced, and the product quality is improved.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a suspension roasting furnace device and a roasting method.
Background
The suspension roasting technology is widely applied to a plurality of fields of nonferrous metallurgy, building materials, ferrous metallurgy, lime, magnesium refractory materials and the like. The suspension roasting furnace is a core device of fluidized roasting engineering. At present, materials in a suspension roasting furnace used in the metallurgical industry enter a gas-solid two-phase separator along with hot gas, and the hot materials obtained through gas-solid separation are cooled to obtain corresponding finished products or semi-finished products, wherein the finished products or semi-finished products generally have the phenomena of unqualified ignition loss, unqualified quality and the like. The thermal strength of the suspension roaster is small, and unqualified finished products or semi-finished products can not be further processed to reach the qualified standard.
The general method for controlling the unqualified products to be burned out is to increase the temperature of the main suspension roasting furnace, but increasing the roasting temperature needs to increase the fuel consumption and increase the air supply rate of the system, thereby increasing the heat consumption and the power consumption.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a suspension roasting furnace device and a roasting method. This suspension roasting furnace device is through increasing the preliminary settler between suspension roasting furnace and cyclone, make some unqualified large granule material of quality that has been through suspension roasting furnace calcination return the suspension roasting furnace bottom and carry out the secondary roasting, make the material concentration in the suspension roasting furnace increase, thereby increased calcination high temperature area capacity, improved the thermal strength of unit volume of suspension roasting furnace, increase the dwell time of unqualified material in the suspension roasting furnace, reduce roasting temperature, reduce the energy consumption, reduce the product and burn and subtract, improve product quality.
The specific technical scheme of the invention is as follows:
the invention relates to a suspension roasting furnace device which comprises a suspension roasting main furnace, a cyclone separator, a pre-settler, an air locking valve and a material returning pipe, wherein the cyclone separator is arranged in the suspension roasting main furnace;
the pre-settler comprises an upper box body and a lower cone, and the upper box body is communicated with the lower cone; the length-diameter ratio of the upper box body is 1: 1-1: 1.5, and the included angle between the inclined plane of the lower cone and the horizontal plane is 60-70 degrees;
the gas-solid discharge port of the suspension roasting main furnace is connected with the gas-solid feed port of the upper box body; the gas-solid discharge port of the upper box body is connected with the gas-solid feed port of the cyclone separator;
the discharge port of the lower cone is connected with the feed inlet of the air locking valve, and the discharge port of the air locking valve is connected with the feed inlet at the bottom of the main suspension roasting furnace through a material returning pipe.
The upper box body is one of a cylinder, a cube or a cuboid.
Further, the cyclone separator is a cyclone gas-solid separator of the roasted material.
Furthermore, the air lock valve is a heavy hammer turnover type air lock valve or a fluidization deflection type air lock valve.
Further, the material returning pipe is a steel pipe with heat insulation materials arranged inside.
A roasting method adopting the suspension roasting furnace device comprises the following steps:
(1) after the preheated material is roasted by the suspension roasting main furnace along with high-temperature gas, the roasted material enters the upper box body of the pre-settler along with the high-temperature gas;
the large-particle materials with unqualified quality in the roasted materials are settled in the lower cone in the upper box body of the pre-settler, and the large-particle materials with unqualified quality settled in the lower cone account for 25% -60% of the roasted materials;
(2) the rest qualified small particle materials enter a cyclone separator along with high-temperature gas to be separated into gas-solid two-phase flow and a roasting material;
(3) when large-particle materials with unqualified quality in a cone at the lower part of the pre-settler reach the material level height at which the air locking valve is automatically opened, the air locking valve is opened, the large-particle materials with unqualified quality enter the return pipe, enter the bottom of the suspension roasting main furnace through the return pipe, are mixed with high-temperature gas and a preheated material in the suspension roasting main furnace again, secondary roasting is carried out, after the large-particle materials with unqualified quality enter the suspension roasting main furnace, the mass concentration of the materials in the suspension roasting main furnace is increased by 1.25-1.6 times, and roasting balance is maintained until roasting is finished.
In the step (1), the speed of the roasted material entering the pre-settler along with the high-temperature gas is 25-45 m/s.
In the step (3), the secondary roasting time of large-particle materials with unqualified quality is 3-4 s.
The invention relates to a suspension roasting furnace device and a roasting method, which have the advantages that:
1. by the method, unqualified materials can be roasted for the second time, because of the heat of the unqualified materials, the unqualified materials are roasted for the second time by using the effective space in the suspension roasting furnace, the retention time of 3-4 s can be prolonged, the roasting time is prolonged, and the heat is used, so that the suspension roasting furnace device can reduce the roasting temperature by 10-15 ℃ compared with the traditional suspension roasting furnace, and save 5-15% of fuel.
2. According to the suspension roasting furnace device, the pre-settler is arranged, so that unqualified materials are roasted for the second time, the retention time (3-4 s) of the unqualified materials is prolonged, the roasting temperature is reduced, the air volume of a system is reduced, and the power consumption is saved by 5-10%.
3. The invention increases the roasting time through secondary roasting, can reduce the product ignition loss and improve the product quality.
4. The invention increases the material capacity of the high-temperature roasting area and improves the roasting efficiency by returning unqualified materials to the suspension roasting furnace.
5. The invention is suitable for suspension roasting of various products in the metallurgical industry, such as alumina, light-burned magnesia and magnetite, and has wide application range.
6. The suspension roasting furnace device has the advantages of simple structure, compact layout, low failure rate, convenience in maintenance and low construction cost. The invention is especially suitable for the reconstruction and extension projects of various factories adopting the suspension roasting furnace technology.
7. After the air locking valve is started, the material can be continuously supplied to the feed inlet at the bottom of the suspension roasting furnace, so that the roasting temperature in the suspension roasting main furnace is stable, great temperature fluctuation is avoided, and the product quality is stable.
Drawings
FIG. 1 is a schematic structural view of a suspension roaster apparatus according to the present invention;
in the figure, 1, a suspension roasting main furnace, 2, a pre-settler: 201. the device comprises an upper box body 202, a lower cone 3, a cyclone separator 4, an air locking valve 5 and a material returning pipe;
A. preheating material, B, high-temperature gas, C, gas-solid two-phase flow, D, roasting material.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the following examples, all the raw materials and equipment used were commercially available unless otherwise specified.
Example 1
A suspension roasting furnace device is shown in a schematic structural diagram of figure 1 and comprises a suspension roasting main furnace 1, a cyclone separator 3, a pre-settler 2, an air locking valve 4 and a material returning pipe 5;
the pre-settler 2 comprises an upper box body 201 and a lower cone 202, wherein the upper box body 201 is communicated with the lower cone 202; the upper box 201 is a cylinder with the length-diameter ratio of 1:1, and the included angle between the inclined plane of the lower cone 202 and the horizontal plane is 66 degrees;
the gas-solid discharge port of the suspension roasting main furnace 1 is connected with the gas-solid feed port of the upper box 201; the gas-solid discharge port of the upper box body 201 is connected with the gas-solid feed port of the cyclone separator 3;
the discharge hole of the lower cone 202 is connected with the feed inlet of the air locking valve 4, and the discharge hole of the air locking valve 4 is connected with the feed inlet at the bottom of the main suspension roasting furnace 1 through a material returning pipe 5.
In this embodiment, the air lock valve 4 is a heavy hammer flip type air lock valve. The return pipe 5 is divided into an inner wall and an outer wall, the inner wall is made of heat insulation materials, and the heat insulation materials in the return pipe of the embodiment are made of refractory castable.
A roasting method adopting the suspension roasting furnace device comprises the following steps:
(1) after the preheating material A is roasted in the suspension roasting main furnace 1 along with the high-temperature gas B, the roasted material enters an upper box body 201 of a pre-settler 2 along with the high-temperature gas B, wherein the speed of the preheating material A entering the pre-settler along with the high-temperature gas B is 25 m/s;
in this example, the preheating material A was Al (OH)3；
Among the roasted materials entering the pre-settler 2, 25% of large granular materials with unqualified quality are settled in the upper box body of the pre-settler to a lower cone, and the rest small granular materials with qualified quality enter a cyclone separator 3 along with high-temperature gas, and are separated into a gas-solid two-phase flow C and a roasted material D through the cyclone separator 3;
(2) after the large-particle materials with unqualified quality in the cone 202 at the lower part of the pre-settler 2 reach the material level height at which the air locking valve 4 is automatically opened, the air locking valve 4 is opened, the large-particle materials with unqualified quality enter the return pipe 5 by utilizing the air locking function of the air locking valve, the large-particle materials with unqualified quality enter the bottom of the main suspension roasting furnace 1 through the return pipe 5, the large-particle materials are mixed with the preheating material A and the high-temperature gas B again for secondary roasting, the concentration of the materials in the main suspension roasting furnace 1 is increased by 1.25 times by the returned large-particle materials with unqualified quality, and roasting balance is maintained until roasting is finished.
The secondary roasting temperature of large-particle materials with unqualified quality in the main suspension roasting furnace 1 is 1035 ℃, and the unit power consumption is 16.1 Kwh/t.Al2O3The unit heat loss is 2.70 GJ/t.Al2O3。
Comparative example
A suspension roasting furnace device comprises a suspension roasting main furnace and a cyclone separator connected with the suspension roasting main furnace; the difference from the embodiment 1 is that a pre-settler, an air locking valve and a material returning pipe are not arranged;
al (OH) without adding a preliminary settler3The temperature of the main suspension roasting furnace is 1050 ℃, and the unit power consumption is 17 KWh/t.Al2O3The unit heat loss is 2.85 GJ/t.Al2O3。
With the addition of a Pre-settler Al (OH) as in example 13Compared with the suspension roasting furnace device, the roasting temperature of the embodiment 1 is reduced by 15 ℃, and the unit power consumption is reduced by 0.9 Kwh/t.Al2O3The unit heat consumption is reduced by 0.15 GJ/t.Al2O3。
Example 2
A suspension roasting furnace device comprises a suspension roasting main furnace 1, a cyclone separator 3, a pre-settler 2, an air lock valve 4 and a material return pipe 5;
the pre-settler 2 comprises an upper box body 201 and a lower cone 202, wherein the upper box body 201 is communicated with the lower cone 202; the upper box 201 is a cuboid with the length-diameter ratio of 1:1.5, and the included angle between the inclined plane of the lower cone 202 and the horizontal plane is 70 degrees;
the gas-solid discharge port of the suspension roasting main furnace 1 is connected with the gas-solid feed port of the upper box 201; the gas-solid discharge port of the upper box body 201 is connected with the gas-solid feed port of the cyclone separator 3;
the discharge hole of the lower cone 202 is connected with the feed inlet of the air locking valve 4, and the discharge hole of the air locking valve 4 is connected with the feed inlet at the bottom of the main suspension roasting furnace 1 through a material returning pipe 5.
In this embodiment, the air lock valve 4 is a fluidization baffling type air lock valve.
A roasting method adopting the suspension roasting furnace device comprises the following steps:
(1) after the preheated material A is roasted in the suspension roasting main furnace 1 along with the high-temperature gas B, the roasted material enters an upper box body 201 of a pre-settler 2 along with the high-temperature gas B, wherein the speed of the roasted material entering the pre-settler along with the high-temperature gas B is 45 m/s;
among the roasted materials entering the pre-settler 2, 60% of large granular materials with unqualified quality are settled in the upper box body of the pre-settler to a lower cone, and the rest small granular materials with qualified quality enter a cyclone separator 3 along with high-temperature gas, and are separated into a gas-solid two-phase flow C and a roasted material D through the cyclone separator 3;
(2) after the large-particle materials with unqualified quality in the cone 202 at the lower part of the pre-settler 2 reach the material level height at which the air locking valve 4 is automatically opened, the air locking valve 4 is opened, the large-particle materials with unqualified quality enter the return pipe 5 by utilizing the air locking function of the air locking valve, the large-particle materials with unqualified quality enter the bottom of the main suspension roasting furnace 1 through the return pipe 5, the large-particle materials are mixed with the preheating material A and the high-temperature gas B again for secondary roasting, the concentration of the materials in the main suspension roasting furnace 1 is increased by 1.6 times by the returned large-particle materials with unqualified quality, and roasting balance is maintained until roasting is finished.
The secondary roasting temperature of large-particle materials with unqualified quality in the main suspension roasting furnace 1 is 1040 ℃, and the secondary roasting time is 3-4 s;
the roasting temperature was reduced by 10 ℃ and the specific power consumption was reduced by 0.83 Kwh/t. Al in comparison with the roasting in the suspension roasting furnace apparatus without the pre-settler2O3The unit heat consumption is reduced by 0.11 GJ/t.Al2O3。
Example 3
A suspension roasting furnace device comprises a suspension roasting main furnace 1, a cyclone separator 3, a pre-settler 2, an air lock valve 4 and a material return pipe 5;
the pre-settler 2 comprises an upper box body 201 and a lower cone 202, wherein the upper box body 201 is communicated with the lower cone 202; the upper box 201 is a cylinder with the length-diameter ratio of 1:1.25, and the included angle between the inclined plane of the lower cone 202 and the horizontal plane is 60 degrees;
the gas-solid discharge port of the suspension roasting main furnace 1 is connected with the gas-solid feed port of the upper box 201; the gas-solid discharge port of the upper box body 201 is connected with the gas-solid feed port of the cyclone separator 3;
the discharge hole of the lower cone 202 is connected with the feed inlet of the air locking valve 4, and the discharge hole of the air locking valve 4 is connected with the feed inlet at the bottom of the main suspension roasting furnace 1 through a material returning pipe 5.
A roasting method adopting the suspension roasting furnace device comprises the following steps:
(1) after the preheated material A is roasted in the suspension roasting main furnace 1 along with the high-temperature gas B, the roasted material enters an upper box body 201 of a pre-settler 2 along with the high-temperature gas B, wherein the speed of the roasted material entering the pre-settler along with the high-temperature gas B is 40 m/s;
among the roasted materials entering the pre-settler 2, 50% of large granular materials with unqualified quality are settled in the upper box body of the pre-settler to a lower cone, and the rest small granular materials with qualified quality enter a cyclone separator 3 along with high-temperature gas, and are separated into a gas-solid two-phase flow C and a roasted material D through the cyclone separator 3;
(2) after large granular materials with unqualified quality in the cone 202 at the lower part of the pre-settler 2 reach the material level height of the air locking valve 4, the air locking valve 4 is opened, the large granular materials with unqualified quality enter the return pipe 5 by utilizing the air locking function of the air locking valve, the large granular materials with unqualified quality enter the bottom of the main suspension roasting furnace 1 through the return pipe 5, the large granular materials with unqualified quality are mixed with the preheating material A and the high-temperature gas B again for secondary roasting, the returned large granular materials with unqualified quality enable the concentration of the materials in the main suspension roasting furnace 1 to be increased by 1.5 times, and the roasting balance is maintained until the roasting is finished;
the roasting temperature was reduced by 11 ℃ and the specific power consumption was reduced by 0.84 Kwh/t. Al in comparison with the roasting in the suspension roasting furnace apparatus without the pre-settler2O3The unit heat consumption is reduced by 0.12 GJ/t.Al2O3。
Example 4
A suspension roasting furnace device, which is the same as the embodiment 1, and is characterized in that an upper box body is a cube with the length-diameter ratio of 1:1.
A roasting method adopting the suspension roasting furnace device comprises the following steps:
(1) after the preheated material A is roasted in the suspension roasting main furnace 1 along with the high-temperature gas B, the roasted material enters an upper box body 201 of a pre-settler 2 along with the high-temperature gas B, wherein the speed of the roasted material entering the pre-settler along with the high-temperature gas B is 30 m/s;
among the roasted materials entering the pre-settler 2, 40% of large granular materials with unqualified quality are settled in the upper box body of the pre-settler to a lower cone, and the rest small granular materials with qualified quality enter a cyclone separator 3 along with high-temperature gas, and are separated into a gas-solid two-phase flow C and a roasted material D through the cyclone separator 3;
(2) after large-particle materials with unqualified quality in the cone 202 at the lower part of the pre-settler 2 reach the material level height of the air locking valve 4, the air locking valve 4 is opened, the large-particle materials with unqualified quality enter the return pipe 5 by utilizing the air locking function of the air locking valve, the large-particle materials with unqualified quality enter the bottom of the main suspension roasting furnace 1 through the return pipe 5, are mixed with the preheating material A and the high-temperature gas B again for secondary roasting, the roasting time of the large-particle materials with unqualified quality is prolonged by 3s to 4s, the returned large-particle materials with unqualified quality increase the concentration of the materials in the main suspension roasting furnace 1 by 1.4 times, and the roasting balance is maintained until the roasting is finished;
the roasting temperature was reduced by 12 ℃ and the specific power consumption was reduced by 0.85 Kwh/t. Al in comparison with the roasting in the suspension roasting furnace apparatus without the pre-settler2O3The unit heat consumption is reduced by 0.13 GJ/t.Al2O3。
Claims (7)
1. A suspension roasting furnace device is characterized by comprising a suspension roasting main furnace, a cyclone separator, a pre-settler, an air locking valve and a material returning pipe;
the pre-settler comprises an upper box body and a lower cone, and the upper box body is communicated with the lower cone; the length-diameter ratio of the upper box body is 1: 1-1: 1.5, and the included angle between the inclined plane of the lower cone and the horizontal plane is 60-70 degrees;
the gas-solid discharge port of the suspension roasting main furnace is connected with the gas-solid feed port of the upper box body; the gas-solid discharge port of the upper box body is connected with the gas-solid feed port of the cyclone separator;
the discharge port of the lower cone is connected with the feed inlet of the air locking valve, and the discharge port of the air locking valve is connected with the feed inlet at the bottom of the main suspension roasting furnace through a material returning pipe.
2. The suspension roasting furnace apparatus of claim 1, wherein the upper box is one of a cylinder, a cube, or a cuboid.
3. The suspension roasting furnace apparatus of claim 1, wherein the air lock valve is a heavy hammer turnover type air lock valve or a fluidization deflection type air lock valve.
4. A suspension roasting furnace apparatus according to claim 1, wherein the return pipe is a steel pipe with an insulating material inside.
5. A roasting method, characterized in that the suspension roasting furnace device of any one of claims 1 to 4 is adopted, and the method comprises the following steps:
(1) after the preheated material is roasted by the suspension roasting main furnace along with high-temperature gas, the roasted material enters the upper box body of the pre-settler along with the high-temperature gas;
the large-particle materials with unqualified quality in the roasted materials are settled in the lower cone in the upper box body of the pre-settler, and the large-particle materials with unqualified quality settled in the lower cone account for 25% -60% of the roasted materials;
(2) the rest qualified small particle materials enter a cyclone separator along with high-temperature gas to be separated into gas-solid two-phase flow and a roasting material;
(3) when large-particle materials with unqualified quality in a cone at the lower part of the pre-settler reach the material level height at which the air locking valve is automatically opened, the air locking valve is opened, the large-particle materials with unqualified quality enter the return pipe, enter the bottom of the suspension roasting main furnace through the return pipe, are mixed with high-temperature gas and a preheated material in the suspension roasting main furnace again, secondary roasting is carried out, after the large-particle materials with unqualified quality enter the suspension roasting main furnace, the mass concentration of the materials in the suspension roasting main furnace is increased by 1.25-1.6 times, and roasting balance is maintained until roasting is finished.
6. The roasting method of claim 5, wherein in the step (1), the speed of the roasted material entering the pre-settler along with the high-temperature gas is 25-45 m/s.
7. The roasting method of claim 5, wherein in the step (3), the secondary roasting time of the large-particle materials with unqualified quality is 3-4 s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112850763A (en) * | 2021-03-19 | 2021-05-28 | 中国铝业股份有限公司 | Energy-saving synergistic roasting method for aluminum oxide |
| CN114754582A (en) * | 2022-03-14 | 2022-07-15 | 沈阳铝镁设计研究院有限公司 | Novel low-temperature roasting system and roasting process for aluminum oxide roasting furnace |
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| CN102502744A (en) * | 2011-10-26 | 2012-06-20 | 北京航天动力研究所 | Slagging-free type and multilevel differential temperature fluidized roasting system for crystallized aluminum salt and method thereof |
| CN206695623U (en) * | 2017-03-21 | 2017-12-01 | 江苏德龙镍业有限公司 | Electric furnace smoke treatment device |
| CN208194119U (en) * | 2018-04-03 | 2018-12-07 | 安徽金森源环保工程有限公司 | A kind of semi-dry desulfurization and denitrification set composite inertia settling chamber |
| CN210292777U (en) * | 2019-03-07 | 2020-04-10 | 北京航化节能环保技术有限公司 | Corrosion-resistant roasting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112850763A (en) * | 2021-03-19 | 2021-05-28 | 中国铝业股份有限公司 | Energy-saving synergistic roasting method for aluminum oxide |
| CN112850763B (en) * | 2021-03-19 | 2023-01-06 | 中国铝业股份有限公司 | Energy-saving synergistic roasting method for aluminum oxide |
| CN114754582A (en) * | 2022-03-14 | 2022-07-15 | 沈阳铝镁设计研究院有限公司 | Novel low-temperature roasting system and roasting process for aluminum oxide roasting furnace |
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Denomination of invention: A kind of suspension roasting furnace device and roasting method Effective date of registration: 20220815 Granted publication date: 20201103 Pledgee: China Construction Bank Corporation Shenyang Free Trade Zone Sub-branch Pledgor: SHENYANG XINBO INDUSTRIAL TECHNOLOGY Co.,Ltd. Registration number: Y2022210000112 |
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