CN104591696A - Blast furnace heavy slag heat-preservation ceramsite and preparation method thereof - Google Patents
Blast furnace heavy slag heat-preservation ceramsite and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a blast furnace heavy slag heat-preservation ceramsite and a preparation method thereof, wherein the ceramsite comprises the following raw materials in part by weight: 55-75 parts of blast furnace heavy slag tailings, 15-25 parts of admixture, 1-25 parts of binder, 1-2 parts of expanding agent and 8-15 parts of water; the admixture is selected from steel slag powder, water granulated slag powder and manganese slag powder. The preparation method comprises the following steps: mixing blast furnace heavy slag tailings, admixture, binder and expanding agent uniformly, and grinding to obtain mixed powders; adding water to the mixed powders; stirring to obtain a mixture; pelletizing to obtain spherical granular raw materials, adding the obtained spherical granular raw materials to a drying system and then to a rotary kiln, roasting at a high temperature for 20-45 minutes, and cooling to obtain the blast furnace heavy slag heat-preservation ceramsite. According to the invention, a large amount of blast furnace heavy slag is taken as a part of raw materials for synthesizing the ceramsite, so that the blast furnace heavy slag is recycled, the production cost of ceramsite for building blocks, and meanwhile, the blast furnace heavy slag is utilized as resources.
Description
Technical field
The present invention relates to metallurgical slag Treatment and recovery and utilize technical field, refer to a kind of heavy blast furnace slag heat-preserving ceramsite and preparation method thereof particularly.
Background technology
In recent years, haydite is as a kind of building material industry, and growth momentum strength is violent.This main manifestations is:
1) starting material used breach rock ballast (artificial sand or river sand), have developed the industrial residues such as flyash, cinder ash, building waste, blast furnace slag, metallurgical tailings gradually;
2) also there is sintered type, high temperature heat expansion type and burning free type in preparation method;
3) Application Areas is from initial building block and light aggregate concrete, to various fields such as sewage disposal filtrate, soilless culture, greening, pervious concretes, give full play to the light weight that haydite possesses, closely knit, heat insulating, numerous premium properties such as permeable, effectively advance the development of China's new inorganic material.
Blast-furnace slag is the solid slag produced in blast-furnace smelting pig iron process.According to the difference of deslagging processing mode, blast-furnace slag can be divided into blast furnace water (quenching) slag (abbreviation grain slag) and the large class of heavy blast furnace slag (abbreviation dry slag) two.When the blast-furnace slag of molten state granulates slag through shrend quenching, be called blast furnace granulated slag; And slowly cooling or the finer and close hard slag of bulk of pouring suitable quantity of water cooling formation are called heavy blast furnace slag in atmosphere.Grain slag produces the important source material of cement, and dry slag is through processing rolling, broken, be sieved into different-grain diameter, only replaces rubble to widely use as material of construction.Dry slag about 9,000 ten thousand tons produced per year by current China iron work.Not only pollute environment, occupy arable land, also waste a large amount of man power and materials, define obvious social effects of pollution.
Known by analysis, the oxide compound containing a large amount of calcium, magnesium, aluminium, silicon etc. in the heavy slag of Baogang BF, accounts for more than 95% of total amount, they or there are higher building materials be worth, or there is higher metallurgy be worth.But, because the different heavy blast furnace slag activeconstituents of crystallization mode is lower, is substantially free of vitreum composition and cement and concrete can not be widely used in as grain slag, thus heavy blast furnace slag comprehensive utilization ratio is not high, pile up serious.But it contains a small amount of ferriferous oxide can reduce firing temperature, the chemical composition of itself meets the needs of haydite production, and heavy blast furnace slag is the very good material producing haydite.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of heavy blast furnace slag heat-preserving ceramsite and preparation method thereof, this haydite has insulation, antidetonation, the performance such as freeze proof, fire-resistant, may be used for preparing holllow building block, simultaneously thus solve current heavy blast furnace slag and pile up and the problem of contaminate environment, the added value that raising heavy blast furnace slag utilizes is made.
For solving the problems of the technologies described above, a kind of heavy blast furnace slag heat-preserving ceramsite provided by the invention, the raw material of described haydite comprises according to ratio of weight and number meter: the water of the heavy blast furnace slag tailings of 55 ~ 75 parts, the blended material of 15 ~ 25 parts, the tackiness agent of 1 ~ 25 part, the swelling agent of 1 ~ 2 part and 8 ~ 15 parts; Wherein, blended material is selected from steel-making slag powder, grain slag powder and manganese ground-slag.
Further, in described blended material, the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1 ~ 3: 1 ~ 3.
Again further, the raw material of described haydite comprises according to ratio of weight and number meter: the water of the heavy blast furnace slag tailings of 60 ~ 70 parts, the blended material of 15 ~ 25 parts, the tackiness agent of 10 ~ 25 parts, the swelling agent of 1 ~ 2 part and 10 ~ 15 parts; Wherein, blended material is made up of steel-making slag powder, grain slag powder and manganese ground-slag, and the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1: 1.
Again further, described heavy blast furnace slag tailings is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, median size≤9.5mm.
Again further, described binding agent is any one or a few in grain slag powder, silicate cement, lime, calcium carbide waste slag and industrial gypsum.
Again further, described swelling agent is any one or a few in aluminum oxide powder, carbonate, powdered carbon, sodium lauryl sulphate.
Again further, the raw material of described haydite also comprises the plant cellulose of 1 ~ 2 part, and wherein, described plant cellulose is any one or a few in papermaking wastewater residue, cane residuals, rice straw.
Again further, the raw material of described haydite comprises according to ratio of weight and number meter: the heavy blast furnace slag tailings of 65 parts, the blended material of 20 parts, the calcium carbide waste slag of 12 parts, the papermaking wastewater residue of 1 part, the aluminum oxide powder of 2 parts; Wherein, the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1: 1.
Present invention also offers a kind of preparation method of heavy blast furnace slag heat-preserving ceramsite, comprise the following steps:
1) raw material takes according to ratio of weight and number meter and comprises: heavy blast furnace slag tailings, blended material, tackiness agent, swelling agent and water, for subsequent use;
2) heavy blast furnace slag tailings, blended material, tackiness agent and swelling agent are mixed, and mix grinding becomes 200 ~ 350 order powder, then stirs 15 ~ 25min, obtains mixed powder;
3) in mixed powder, water is added; Low whipping speed is under 150 ~ 250r/min condition, stirs 15 ~ 25min; Obtain mixture; Pelletizing obtains spherical granular raw material, and particle diameter is 2 ~ 15mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 50 ~ 70 DEG C, dry again, then enter in rotary kiln, at 600 ~ 750 DEG C of raw burn 45 ~ 100min, last at 1150 ~ 1450 DEG C of high-temperature roasting 20 ~ 45min, after cooling, namely obtain heavy blast furnace slag heat-preserving ceramsite.
In technique scheme, described step 4) in, the temperature of oven dry 125 ~ 250 DEG C, drying time 90 ~ 110min.
Beneficial effect of the present invention is:
1) large dosage be make use of the part material of heavy blast furnace slag as synthesizing ceramsite by the present invention, heavy blast furnace slag is recycled, and effectively reduces the production cost of building block haydite, make heavy blast furnace slag get utilization simultaneously;
2) the present invention prepares slag haydite tap density and is less than 600kg/m
3, ultimate compression strength is greater than 2.5MPa, is suitable for producing Light trabs;
3) contain the oxide compound of iron in the main raw material heavy blast furnace slag that the present invention adopts, can maturing temperature be reduced when high-temperature roasting, thus provide further relative savings the energy.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
Embodiment 1
Take the heavy blast furnace slag tailings of 75 parts, the steel-making slag powder of 5 parts, the grain slag powder of 5 parts, the manganese ground-slag of 5 parts, the grain slag powder of 7 parts, the papermaking wastewater residue of 2 parts, the aluminum oxide powder of 1 part, in shredder, mix grinding becomes 250 order powder, then in stirrer, 20min is stirred, take 10 parts, water evenly to add, in stirrer, remix stirs 15min, and stirring velocity is 250r/min, mixes to obtain mixture; Then on high pressure para-roller ball pressing machine, pelletizing obtains spherical granular raw material, and particle diameter is 5mm; Spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 70 DEG C, then dries, stoving oven temperature 200 DEG C, drying time 90min.Then enter rotary kiln and carry out 650 DEG C of raw burn 100min, finally at 1250 DEG C of high-temperature roasting 20min, after cooling, namely obtain heavy blast furnace slag haydite 1.
Heavy blast furnace slag tailings is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, and median size is≤9.5mm.
After the described heavy blast furnace slag heat-preserving ceramsite 1 of acquisition, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 325kg/m
3, ultimate compression strength is 3.5MPa, 1h water-intake rate is 3.35%, and property indices is excellent.
The rate of utilization of heavy blast furnace slag tailings improves, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment 2
Take the silicate cement of the heavy blast furnace slag tailings of 72 parts, the steel-making slag powder of 5 parts, the grain slag powder of 5 parts, the manganese ground-slag of 5 parts, the grain slag powder of 5 parts and 5 parts, the rice straw of 1 part, the aluminum oxide powder of 2 parts, in shredder, mix grinding becomes 250 order powder, then in stirrer, 15min is stirred, take 10 parts, water evenly to add, in stirrer, remix stirs 15min, and stirring velocity is 200r/min, mixes to obtain mixture; Then on high pressure para-roller ball pressing machine, pelletizing obtains spherical granular raw material, and particle diameter is 5mm; Spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 70 DEG C, then dries, stoving oven temperature 200 DEG C, drying time 100min.Then enter rotary kiln and carry out 650 DEG C of raw burn 90min, finally at 1150 DEG C of high-temperature roasting 25min, after cooling, namely obtain heavy blast furnace slag haydite 2.
Heavy blast furnace slag tailings is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, and median size is≤9.5mm.
After acquisition heavy blast furnace slag heat-preserving ceramsite 2, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 471kg/m
3, ultimate compression strength is 3.9MPa, 1h water-intake rate is 2.01%, and property indices is excellent.
The rate of utilization of heavy blast furnace slag tailings improves, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment 3
Take the heavy blast furnace slag tailings of 70 parts, the steel-making slag powder of 20 parts, the lime of 8 parts, the powdered carbon of 2 parts, in shredder, mix grinding becomes 250 order powder, then in stirrer, 20min is stirred, take 11 parts, water evenly to add, in stirrer, remix stirs 10min, and stirring velocity is 250r/min, mixes to obtain mixture; Then on high pressure para-roller ball pressing machine, pelletizing obtains spherical granular raw material, and particle diameter is 8mm; Spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dries, stoving oven temperature 200 DEG C, drying time 90min.Then enter rotary kiln and carry out 700 DEG C of raw burn 100min, finally at 1280 DEG C of high-temperature roasting 21min, after cooling, namely obtain heavy blast furnace slag haydite 3.
Heavy blast furnace slag tailings 3 is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, and median size is≤9.5mm.
After obtaining heavy blast furnace slag heat-preserving ceramsite 3, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 426kg/m
3, ultimate compression strength is 4.1MPa, 1h water-intake rate is 2.55%, and property indices is excellent.
The rate of utilization of heavy blast furnace slag tailings improves, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment 4
Take 65 parts of heavy blast furnace slag tailings, the steel-making slag powder of 6 parts, the grain slag powder of 6 parts and the manganese ground-slag of 6 parts, the calcium carbide waste slag of 12 parts, the papermaking wastewater residue of 1 part, the aluminum oxide powder of 2 parts, in shredder, mix grinding becomes 250 order powder, then in stirrer, 15min is stirred, take 8 parts, water evenly to add, in stirrer, remix stirs 25min, and stirring velocity is 200r/min, mixes to obtain mixture; Then on high pressure para-roller ball pressing machine, pelletizing obtains spherical granular raw material, and particle diameter is 5mm; Spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 60 DEG C, then dries, stoving oven temperature 150 DEG C, drying time 110min.Then enter rotary kiln and carry out 650 DEG C of raw burn 80min, finally at 1350 DEG C of high-temperature roasting 25min, after cooling, namely obtain heavy blast furnace slag haydite 4.
Heavy blast furnace slag tailings 4 is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, and median size is≤9.5mm.
After the described heavy blast furnace slag heat-preserving ceramsite 4 of acquisition, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 375kg/m
3, ultimate compression strength is 2.9MPa, 1h water-intake rate is 1.25%, and property indices is excellent.
The rate of utilization of heavy blast furnace slag tailings improves, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment 5
Take 60 parts of heavy blast furnace slag tailings, the manganese ground-slag of 20 parts, the grain slag powder of 15 parts, the desulfurated plaster of 5 parts, the aluminum oxide powder of 2 parts, in shredder, mix grinding becomes 200 order powder, then in stirrer, 15min is stirred, take 10 parts, water evenly to add, in stirrer, remix stirs 25min, and stirring velocity is 150r/min, mixes to obtain mixture; Then on high pressure para-roller ball pressing machine, pelletizing obtains spherical granular raw material, and particle diameter is 10mm; Spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 60 DEG C, then dries, stoving oven temperature 250 DEG C, drying time 90min.Then enter rotary kiln and carry out 650 DEG C of raw burn 80min, finally at 1250 DEG C of high-temperature roasting 35min, after cooling, namely obtain heavy blast furnace slag haydite 5.
Heavy blast furnace slag tailings is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, and median size is≤9.5mm.
After obtaining described heavy blast furnace slag heat-preserving ceramsite 5, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 457kg/m
3, ultimate compression strength is 4.1MPa, 1h water-intake rate is 2.07%, and property indices is excellent.
The rate of utilization of heavy blast furnace slag tailings improves, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment 6
The method of the present embodiment is substantially the same manner as Example 1, and difference is:
The raw material of haydite comprises according to ratio of weight and number meter: the water of the heavy blast furnace slag tailings of 55 parts, the steel-making slag powder of 25 parts, the silicate cement of 5 parts, the lime of 5 parts, the calcium carbide waste slag of 5 parts, the carbonate of 0.5 part, the powdered carbon of 0.5 part, the sodium lauryl sulphate of 0.5 part and 8 ~ 15 parts.
After obtaining described heavy blast furnace slag heat-preserving ceramsite 6, measure performance index such as the tap density of described heavy blast furnace slag heat-preserving ceramsite, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described heavy blast furnace slag heat-preserving ceramsite is 470kg/m
3, ultimate compression strength is 4.3MPa, 2h water-intake rate is 2.57%, and property indices is excellent.
Other unspecified part is prior art.Although above-described embodiment is to invention has been detailed description; but it is only the present invention's part embodiment; instead of whole embodiment, people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments all belong to scope.
Claims (10)
1. a heavy blast furnace slag heat-preserving ceramsite, is characterized in that: the raw material of described haydite comprises according to ratio of weight and number meter: the water of the heavy blast furnace slag tailings of 55 ~ 75 parts, the blended material of 15 ~ 25 parts, the tackiness agent of 1 ~ 25 part, the swelling agent of 1 ~ 2 part and 8 ~ 15 parts; Wherein, blended material is selected from steel-making slag powder, grain slag powder and manganese ground-slag.
2. heavy blast furnace slag heat-preserving ceramsite according to claim 1, is characterized in that: in described blended material, the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1 ~ 3: 1 ~ 3.
3. heavy blast furnace slag heat-preserving ceramsite according to claim 1 and 2, is characterized in that: the raw material of described haydite comprises according to ratio of weight and number meter: the water of the heavy blast furnace slag tailings of 60 ~ 70 parts, the blended material of 15 ~ 25 parts, the tackiness agent of 10 ~ 25 parts, the swelling agent of 1 ~ 2 part and 10 ~ 15 parts; Wherein, blended material is made up of steel-making slag powder, grain slag powder and manganese ground-slag, and the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1: 1.
4. heavy blast furnace slag heat-preserving ceramsite according to claim 1 and 2, is characterized in that: described heavy blast furnace slag tailings is the tailings of heavy blast furnace slag after magnetic separation, and its metal Ferrum content is less than 1%, median size≤9.5mm.
5. heavy blast furnace slag heat-preserving ceramsite according to claim 1 and 2, is characterized in that: described binding agent be in grain slag powder, silicate cement, lime, calcium carbide waste slag and industrial gypsum any one or several.
6. heavy blast furnace slag heat-preserving ceramsite according to claim 1 and 2, is characterized in that: described swelling agent is any one or a few in aluminum oxide powder, carbonate, powdered carbon, sodium lauryl sulphate.
7. heavy blast furnace slag heat-preserving ceramsite according to claim 1 and 2, it is characterized in that: the raw material of described haydite also comprises the plant cellulose of 1 ~ 2 part, wherein, described plant cellulose is any one or a few in papermaking wastewater residue, cane residuals, rice straw.
8. heavy blast furnace slag heat-preserving ceramsite according to claim 7, it is characterized in that: the raw material of described haydite comprises according to ratio of weight and number meter: the heavy blast furnace slag tailings of 65 parts, the blended material of 18 parts, the calcium carbide waste slag of 12 parts, the papermaking wastewater residue of 1 part, the aluminum oxide powder of 2 parts; Wherein, the weight ratio of steel-making slag powder, grain slag powder and manganese ground-slag is 1: 1: 1.
9. a preparation method for heavy blast furnace slag heat-preserving ceramsite described in claim 1, is characterized in that: comprise the following steps:
1) raw material takes according to ratio of weight and number meter and comprises: heavy blast furnace slag tailings, blended material, tackiness agent, swelling agent and water, for subsequent use;
2) heavy blast furnace slag tailings, blended material, tackiness agent and swelling agent are mixed, and mix grinding becomes 200 ~ 350 order powder, then stirs 15 ~ 25min, obtains mixed powder;
3) in mixed powder, water is added; Low whipping speed is under 150 ~ 250r/min condition, stirs 15 ~ 25min; Obtain mixture; Pelletizing obtains spherical granular raw material, and particle diameter is 2 ~ 15mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 50 ~ 70 DEG C, dry again, then enter in rotary kiln, at 600 ~ 750 DEG C of raw burn 45 ~ 100min, last at 1150 ~ 1450 DEG C of high-temperature roasting 20 ~ 45min, after cooling, namely obtain heavy blast furnace slag heat-preserving ceramsite.
10. the preparation method of heavy blast furnace slag heat-preserving ceramsite according to claim 9, is characterized in that: described step 4) in, the temperature of oven dry 125 ~ 250 DEG C, drying time 90 ~ 110min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105130397A (en) * | 2015-07-13 | 2015-12-09 | 昆明理工大学 | Novel ceramisite and preparation method thereof |
| CN106220109A (en) * | 2016-08-11 | 2016-12-14 | 武汉钢铁股份有限公司 | The production method of unburned self-insulation wall material |
| CN107915471A (en) * | 2017-12-01 | 2018-04-17 | 武汉钢铁有限公司 | A kind of light thermal-insulation aggregate and method that iron-stone tailing is prepared using large-sized rotary kiln |
| CN108623278A (en) * | 2018-05-18 | 2018-10-09 | 武汉科技大学 | A kind of baking-free ceramicite and preparation method thereof containing slag and slag |
| CN113200760A (en) * | 2021-05-20 | 2021-08-03 | 安徽省通源环境节能股份有限公司 | Method for preparing ceramsite from sludge-based biochar |
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| CN1896031A (en) * | 2006-06-28 | 2007-01-17 | 内蒙古科技大学 | Formula of high-strength light ceramic grain made from fly-ash |
| CN102173850A (en) * | 2011-01-24 | 2011-09-07 | 天津壹生环保科技有限公司 | Energy-saving consumption-reducing technique for preparing haydite by co-disposing polluted soil and desilting sediment |
| CN102503515A (en) * | 2011-11-10 | 2012-06-20 | 许庆华 | Cylindrical refractory attapulgite ceramsite |
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| CN1896031A (en) * | 2006-06-28 | 2007-01-17 | 内蒙古科技大学 | Formula of high-strength light ceramic grain made from fly-ash |
| CN102173850A (en) * | 2011-01-24 | 2011-09-07 | 天津壹生环保科技有限公司 | Energy-saving consumption-reducing technique for preparing haydite by co-disposing polluted soil and desilting sediment |
| CN102503515A (en) * | 2011-11-10 | 2012-06-20 | 许庆华 | Cylindrical refractory attapulgite ceramsite |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130397A (en) * | 2015-07-13 | 2015-12-09 | 昆明理工大学 | Novel ceramisite and preparation method thereof |
| CN106220109A (en) * | 2016-08-11 | 2016-12-14 | 武汉钢铁股份有限公司 | The production method of unburned self-insulation wall material |
| CN107915471A (en) * | 2017-12-01 | 2018-04-17 | 武汉钢铁有限公司 | A kind of light thermal-insulation aggregate and method that iron-stone tailing is prepared using large-sized rotary kiln |
| CN108623278A (en) * | 2018-05-18 | 2018-10-09 | 武汉科技大学 | A kind of baking-free ceramicite and preparation method thereof containing slag and slag |
| CN113200760A (en) * | 2021-05-20 | 2021-08-03 | 安徽省通源环境节能股份有限公司 | Method for preparing ceramsite from sludge-based biochar |
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