CN106854705A - It is suitable to ore-proportioning method and its application of titanium slag electric furnace smelting process - Google Patents
It is suitable to ore-proportioning method and its application of titanium slag electric furnace smelting process Download PDFInfo
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- CN106854705A CN106854705A CN201510903216.3A CN201510903216A CN106854705A CN 106854705 A CN106854705 A CN 106854705A CN 201510903216 A CN201510903216 A CN 201510903216A CN 106854705 A CN106854705 A CN 106854705A
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- 239000010936 titanium Substances 0.000 title claims abstract description 200
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 195
- 239000002893 slag Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000003723 Smelting Methods 0.000 title claims abstract description 36
- 230000008569 process Effects 0.000 title claims abstract description 29
- 239000012141 concentrate Substances 0.000 claims abstract description 129
- 239000012535 impurity Substances 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 238000002156 mixing Methods 0.000 claims description 64
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 50
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- 229910009973 Ti2O3 Inorganic materials 0.000 claims description 6
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 abstract 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses the ore-proportioning method and its application that are suitable to titanium slag electric furnace smelting process, the method is comprised the following steps：Non-ferrous impurities content and TiO based on various ilmenite concentrates2/ Fe values, determine the mixed proportion of each ilmenite concentrate；And the mixed proportion based on each ilmenite concentrate is carried out with ore deposit, to obtain ilmenite concentrate mixture.Can be carried out with ore deposit using the ilmenite concentrate of different ore deposit points using the method, then produced using with the ilmenite concentrate mixture after ore deposit, can effectively ensure that electric furnace enters the steady quality of stove ilmenite concentrate and continuous, stable titanium slag quality of coming out of the stove, reduces the generation of serious technology accident in working of a furnace wave process, and, the method process is simple, safe operation, convenience, it is practical, it is easy to promote.
Description
Technical Field
The invention relates to an ore blending method suitable for a titanium slag electric furnace smelting process and application thereof.
Background
The titanium slag produced by smelting titanium concentrate in an electric furnace is very sensitive to the properties of raw materials, the smelting characteristics of the titanium concentrate of different types and different production places are very different, and different operating systems and operating parameters are required. The domestic titanium concentrate has the characteristics of large quality difference of ore points and small ore removal batch, so that the ore species are frequently replaced in the process of smelting titanium slag by an electric furnace, the furnace condition changes violently in the process of replacing the ore, and serious process accidents such as material collapse, foamed slag and the like are easily caused. Meanwhile, the quality of titanium slag produced by different titanium concentrates is slightly different, and a period of time is required for exploring the most appropriate operating parameters when changing one ore. In the process, the quality of the produced titanium slag has great fluctuation and the quality percent of pass is low.
Therefore, the existing electric furnace smelting method of titanium slag still needs to be improved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a titanium slag electric furnace smelting process which can ensure stable and continuous quality of titanium concentrate fed into the electric furnace, stabilize the quality of discharged titanium slag and reduce serious process accidents in the process of furnace condition fluctuation.
It should be noted that the present invention has been completed based on the following findings of the inventors:
the inventor finds that according to the factors which have the greatest influence on the quality of discharged titanium slag and the furnace condition in the quality of the titanium concentrate, the titanium concentrates of different ore points are used for ore blending, and then the mixture after ore blending is used for production, so that the stable and continuous quality of the titanium concentrates charged into the electric furnace can be effectively ensured, the quality of discharged titanium slag is stabilized, and the occurrence of serious process accidents in the fluctuation process of the furnace condition is reduced.
Specifically, in the quality parameters of the titanium concentrate, the grade of the discharged titanium slag (the grade of the discharged titanium slag, namely the target grade) is the TiO of the discharged titanium slag2Grade, which is to convert all Ti oxides in the titanium slag into TiO2Mass of the latterPercentage ratio) is the content of non-ferrous impurities in the titanium concentrate, after the grade of the titanium slag to be produced is determined, the proper content range of the non-ferrous impurities is calculated, and then 2 or more titanium concentrates can be prepared according to the target. The titanium concentrate quality parameter with the largest influence on the furnace condition is TiO2Ratio of Fe to TiO2Fe, too high TiO2The Fe value can cause insufficient reduction of discharged titanium slag, the discharged molten iron amount is small, and the molten iron temperature is high; and too low TiO2The Fe value can cause the output of the discharged titanium slag to be small and the temperature of the discharged molten iron to be too low. Thus, combining the non-ferrous impurity content range with TiO2The Fe value range can finally determine the proper ore blending ratio.
Furthermore, according to one aspect of the invention, the invention provides an ore blending method suitable for the titanium slag electric furnace smelting process. According to an embodiment of the invention, the method comprises the steps of: non-ferrous impurity content and TiO based on multiple titanium concentrates2Determining the mixing proportion of each titanium concentrate according to the Fe value; and carrying out ore blending based on the mixing proportion of each titanium concentrate so as to obtain a titanium concentrate mixture.
The inventor surprisingly finds that the method can be used for matching the titanium concentrates of different ore points and then producing by using the titanium concentrate mixture after matching, so that the stable and continuous quality of the titanium concentrates entering the electric furnace can be effectively ensured, the quality of the titanium slag discharged from the electric furnace is stabilized, and the occurrence of serious process accidents in the fluctuation process of the furnace condition is reduced. Moreover, according to the embodiment of the invention, the method has the advantages of simple process, safe and convenient operation, strong practicability and easy popularization.
In addition, the ore blending method suitable for the electric furnace smelting process of the titanium slag according to the embodiment of the invention can also have the following additional technical characteristics:
according to an embodiment of the invention, the mixing ratio of each titanium concentrate is determined by the following steps: determining the theoretical maximum value of the content of non-iron impurities in the titanium concentrate mixture based on the target grade of the discharged titanium slag; based on the content of non-ferrous impurities in each titanium concentrate and on the non-ferrous impurities in the titanium concentrate mixtureDetermining the preset mixing proportion of the first titanium concentrate according to the theoretical maximum value of the iron impurity content; based on TiO in each titanium concentrate2Fe value and predetermined electric furnace smelting titanium slag TiO2Determining the predetermined mixing proportion of the second titanium concentrate according to the Fe value; and determining the mixing proportion of each titanium concentrate based on the first titanium concentrate predetermined mixing proportion and the second titanium concentrate predetermined mixing proportion.
According to an embodiment of the invention, the content of non-ferrous impurities in the first titanium concentrate mixture obtained by proportioning the first titanium concentrate according to the predetermined mixing proportion is not more than the theoretical maximum value of the content of non-ferrous impurities in the titanium concentrate mixture.
According to an embodiment of the invention, the theoretical maximum value of the non-ferrous impurity content in the titanium concentrate mixture is determined by the following formula:
the theoretical maximum value of the content of non-iron impurities in the titanium concentrate mixture (100 percent, the target grade of the discharged titanium slag percent FeO percent and Ti percent)2O3Reduced TiO2The percentage of the surplus) divided by the enrichment ratio,
wherein,
FeO%: the weight percentage of FeO in the titanium slag discharged from the furnace,
Ti2O3reduced TiO2Surplus of (c): ti in the discharged titanium slag2O3Is converted into TiO2After weight percent of Ti2O3The weight percentage of (A) to (B),
enrichment ratio: the ratio of the weight percent of non-ferrous impurities in the titanium slag to the average of the weight percent of non-ferrous impurities in each titanium concentrate.
Wherein, the enrichment ratio is an empirical value. According to some specific examples of the invention, the empirical value of the titanium slag enrichment ratio for the target grade > 82% is 1.8.
According to an embodiment of the invention, Ti of the second titanium concentrate mixture obtained by proportioning the ores according to the predetermined mixing proportion of the second titanium concentrateO2The Fe value is in the predetermined electric furnace smelting titanium slag TiO2A value in the range of the/Fe value.
According to an embodiment of the invention, said predetermined electric furnace smelt titanium slag TiO2The value of/Fe is an empirical value. According to some specific examples of the invention, the predetermined electric furnace smelting titanium slag TiO2The value of Fe is 1.2-1.65.
According to the embodiment of the present invention, the mixing ratio of each titanium concentrate is determined by the following conditions: the mixing proportion of each titanium concentrate simultaneously meets the requirements of the preset mixing proportion of the first titanium concentrate and the preset mixing proportion of the second titanium concentrate. Therefore, the mixing proportion of each titanium concentrate can be accurately and effectively determined, and the ore blending of the titanium slag electric furnace smelting process is effectively realized.
According to another aspect of the invention, the invention provides a titanium slag electric furnace smelting raw material. According to an embodiment of the invention, the titanium slag electric furnace smelting raw material is a titanium concentrate mixture obtained by the ore blending method suitable for the titanium slag electric furnace smelting process. The inventor surprisingly finds that the titanium slag electric furnace smelting raw material is used for carrying out the titanium slag electric furnace smelting production, so that the stable and continuous quality of the titanium concentrate fed into the electric furnace can be effectively ensured, the quality of the discharged titanium slag is stabilized, and the occurrence of serious process accidents in the furnace condition fluctuation process is reduced.
According to another aspect of the invention, the invention also provides a titanium slag electric furnace smelting method. According to an embodiment of the present invention, the method uses a titanium concentrate mixture obtained by the above-described ore blending method suitable for the titanium slag electric furnace smelting process as a titanium slag electric furnace smelting raw material. According to the embodiment of the invention, the method is used for carrying out electric furnace smelting production of the titanium slag, the stable and continuous quality of the titanium concentrate fed into the electric furnace can be effectively ensured, the quality of the discharged titanium slag is stabilized, and the occurrence of serious process accidents in the fluctuation process of the furnace conditions is reduced.
The titanium slag electric furnace smelting method provided by the embodiment of the invention has at least one of the following advantages:
1. the quality of the titanium concentrate fed into the furnace can be effectively stabilized, and the fluctuation of the furnace condition is reduced.
2. Can obviously improve the quality qualification rate of the discharged titanium slag.
3. The adaptability of the electric furnace to various kinds of titanium concentrates at various ore points can be effectively improved, and the application range of raw materials is expanded.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1:
for titanium concentrate a and titanium concentrate b (the main contents are shown in the following table), titanium slag with the production grade of more than 82% is required to be prepared according to the method of the invention, and the specific steps are as follows:
| Fe％ | total amount of non-ferrous impurities | |||
| Titanium concentrate a | 49 | 27 | 5 | 1.815 |
| Titanium concentrate b | 45 | 36 | 11 | 1.25 |
1. Determination of theoretical maximum value of non-ferrous impurity content in titanium concentrate mixture
The theoretical maximum value of the content of the nonferrous impurities in the titanium concentrate mixture is calculated based on the target grade of the discharged titanium slag, and the calculation formula is as follows:
the theoretical maximum value of the content of non-iron impurities in the titanium concentrate mixture (100 percent, the target grade of the discharged titanium slag percent FeO percent and Ti percent)2O3Reduced TiO2The percentage of the surplus) divided by the enrichment ratio,
wherein,
FeO%: the weight percentage of FeO in the titanium slag discharged from the furnace,
Ti2O3reduced TiO2Surplus of (c): ti in the discharged titanium slag2O3Is converted into TiO2After weight percent of Ti2O3In percent by weight of。
Enrichment ratio: the ratio of the weight percentage of the non-iron impurities in the titanium slag to the weight percentage of the non-iron impurities in the titanium concentrate is an empirical value, and the empirical value of the enrichment ratio of the target grade of the discharged titanium slag is 1.8.
As a result, it was calculated that: the theoretical maximum non-ferrous impurity content in the titanium concentrate mixture (100% -82% -7% + 2%) ÷ 1.8 ═ 7.22%
Namely: the maximum value of the content of the non-iron impurities in the titanium concentrate mixture is 7.22 percent, and the titanium slag with the grade of more than 82 percent can be produced as long as the content of the non-iron impurities after ore blending is ensured to be less than 7.22 percent.
2. Determining a predetermined mix ratio of the first titanium concentrate
Based on the theoretical maximum value of the content of the non-ferrous impurities in the titanium concentrate mixture, which is 7.22%, and the content of the non-ferrous impurities in the titanium concentrate mixture, a suitable ore blending condition, that is, a predetermined mixing proportion of the first titanium concentrate, is determined.
Specifically, the method comprises the following steps:
and setting the preset mixing proportion of the first titanium concentrate as x, namely titanium concentrate a: the titanium concentrate b is x,
based on the following conditions, the equation is obtained: the content of non-ferrous impurities in the first titanium concentrate mixture obtained by mixing and proportioning according to the proportion x is not more than 7.22 percent of the theoretical maximum value of the content of non-ferrous impurities in the titanium concentrate mixture,
the equation is as follows:
(5％*1+11％*1/x)/(1+1/x)≤7.22％，
solving the equation to obtain: x is not less than 1.703.
That is, the predetermined mixing ratio (weight ratio) of the first titanium concentrate is: titanium concentrate a: the titanium concentrate b is not less than 1.703.
3. Determining a predetermined mixing ratio of the second titanium concentrate
Based on eachTiO in titanium concentrates2Fe value and predetermined electric furnace smelting titanium slag TiO2And determining the predetermined mixing proportion of the second titanium concentrate according to the Fe value.
Wherein, the electric furnace is used for smelting TiO suitable for the titanium slag2The empirical range of the/Fe value is from 1.2 to 1.65.
Determining the predetermined mixing proportion of the second titanium concentrate by the following method:
and setting the preset mixing proportion of the second titanium concentrate as y, namely titanium concentrate a: the titanium concentrate b is equal to y,
TiO based on second titanium concentrate mixture obtained by ore blending according to predetermined mixing proportion of second titanium concentrate2The Fe value is in the predetermined electric furnace smelting titanium slag TiO2In the range of the/Fe value, the equation is thus obtained:
1.2≤(1.815*1+1.25*1/y)/(1+1/y)≤1.65，
solving the equation to obtain: y is more than or equal to 0 and less than or equal to 2.424.
That is, the predetermined mixing ratio (weight ratio) of the second titanium concentrate is: titanium concentrate a is not less than 0: the titanium concentrate b is less than or equal to 2.424.
4. Determining the mixing proportion of each titanium concentrate
And determining the mixing proportion of each titanium concentrate based on the predetermined mixing proportion of the first titanium concentrate and the predetermined mixing proportion of the second titanium concentrate.
Wherein the mixing proportion of each titanium concentrate is determined by the following conditions:
the mixing ratio of the titanium concentrates must meet the requirements of the predetermined mixing ratio of the first titanium concentrate and the predetermined mixing ratio of the second titanium concentrate at the same time.
Thus, combining the foregoing results, the final ore blending ratio determined is: 1.703 titanium concentrate a: the titanium concentrate b is less than or equal to 2.424.
However, because the higher the grade of the titanium concentrate, the higher the price, therefore, the proportion of the titanium concentrate a: and (4) obtaining the titanium concentrate b which is 1.703.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. An ore blending method suitable for a titanium slag electric furnace smelting process is characterized by comprising the following steps:
non-ferrous impurity content and TiO based on multiple titanium concentrates2Determining the mixing proportion of each titanium concentrate according to the Fe value; and
and carrying out ore blending based on the mixing proportion of each titanium concentrate so as to obtain a titanium concentrate mixture.
2. The method of claim 1, wherein the mixing ratio of each titanium concentrate is determined by:
determining the theoretical maximum value of the content of non-iron impurities in the titanium concentrate mixture based on the target grade of the discharged titanium slag;
determining a predetermined mixing proportion of the first titanium concentrate based on the content of the non-ferrous impurities in each titanium concentrate and a theoretical maximum value of the content of the non-ferrous impurities in the titanium concentrate mixture;
based on TiO in each titanium concentrate2Fe value and predetermined electric furnace smelting titanium slag TiO2Determining the predetermined mixing proportion of the second titanium concentrate according to the Fe value; and
and determining the mixing proportion of each titanium concentrate based on the predetermined mixing proportion of the first titanium concentrate and the predetermined mixing proportion of the second titanium concentrate.
3. The method of claim 2, wherein the amount of non-ferrous impurities in the first titanium concentrate mixture resulting from the proportioning of the first titanium concentrate according to the predetermined mix proportion is not greater than the theoretical maximum amount of non-ferrous impurities in the titanium concentrate mixture.
4. The method according to claim 3, characterized in that the theoretical maximum value of the content of non-ferrous impurities in the titanium concentrate mixture is determined by the following formula:
the theoretical maximum value of the content of non-iron impurities in the titanium concentrate mixture (100 percent, the target grade of the discharged titanium slag percent FeO percent and Ti percent)2O3Reduced TiO2The percentage of the surplus) divided by the enrichment ratio,
wherein,
FeO%: the weight percentage of FeO in the titanium slag discharged from the furnace,
Ti2O3reduced TiO2Surplus of (c): ti in the discharged titanium slag2O3Is converted into TiO2After weight percent of Ti2O3The weight percentage of (A) to (B),
enrichment ratio: the ratio of the weight percent of non-ferrous impurities in the titanium slag to the average of the weight percent of non-ferrous impurities in each titanium concentrate.
5. The method of claim 2, wherein the TiO of the second titanium concentrate mixture is proportioned according to the predetermined mixing ratio of the second titanium concentrate2The Fe value is in the predetermined electric furnace smelting titanium slag TiO2A value in the range of the/Fe value.
6. The method according to claim 5, characterized in that the predetermined electric furnace smelting titanium slag TiO2The value of Fe is 1.2-1.65.
7. The method according to claim 2, wherein the mixing ratio of each titanium concentrate is determined by the following conditions:
the mixing proportion of each titanium concentrate simultaneously meets the requirements of the preset mixing proportion of the first titanium concentrate and the preset mixing proportion of the second titanium concentrate.
8. A titanium slag electric furnace smelting raw material which is a titanium concentrate mixture obtained by the ore blending method suitable for the titanium slag electric furnace smelting process according to any one of claims 1 to 7.
9. A titanium slag electric furnace smelting method, characterized in that the titanium concentrate mixture obtained by the method of any one of claims 1 to 7 is used as a titanium slag electric furnace smelting raw material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109468424A (en) * | 2018-11-23 | 2019-03-15 | 宜宾天原集团股份有限公司 | A method of high titanium slag is prepared using low grade natural rutile |
| CN115612862A (en) * | 2022-09-07 | 2023-01-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting titanium slag from low-quality titanium raw material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115612862A (en) * | 2022-09-07 | 2023-01-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting titanium slag from low-quality titanium raw material |
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