CN113215391A - Ore blending method based on sinter metallurgy performance - Google Patents
Ore blending method based on sinter metallurgy performance Download PDFInfo
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- 238000002156 mixing Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005272 metallurgy Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000012141 concentrate Substances 0.000 claims abstract description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052595 hematite Inorganic materials 0.000 claims abstract description 8
- 239000011019 hematite Substances 0.000 claims abstract description 8
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims abstract description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011812 mixed powder Substances 0.000 claims abstract description 4
- 238000007639 printing Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 66
- 229910052742 iron Inorganic materials 0.000 claims description 32
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 2
- 238000005245 sintering Methods 0.000 description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- 229910052593 corundum Inorganic materials 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910001845 yogo sapphire Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 229910052681 coesite Inorganic materials 0.000 description 5
- 229910052906 cristobalite Inorganic materials 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000004886 process control Methods 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an ore blending method based on sinter metallurgy performance, which comprises 70% of main stream fine ore, less than or equal to 20% of non-main stream fine ore and more than or equal to 10% of concentrate by mass percent; wherein, TFe is more than or equal to 60 percent of main flow fine ore, and less than 60 percent of non-main flow fine ore; the ore species in the main stream fine ore, the non-main stream fine ore and the concentrate satisfy the following structural mass percentages: less than or equal to 60 percent of limonite, more than or equal to 30 percent of hematite and more than or equal to 10 percent of magnetite; wherein the limonite comprises 15-25% of PB powder or Newman powder, 15-20% of Mike powder or golden baba powder and no more than 25% of super powder or printing powder; the content of Brazil mixed powder or south African powder in hematite is 30-40%. Solves the problem that the prior sinter can not ensure the metallurgical property.
Description
Technical Field
The invention belongs to the technical field of production methods of sinter, and particularly relates to an ore blending method based on sinter metallurgy performance.
Background
The sintering process is a complex physical and chemical reaction process, the influence factors are extremely large, when the optimization of the sintering raw materials is considered, the raw material price and the chemical components are considered, the sintering reactivity is also considered, the first-hand material performance data is mastered in iron-containing material ore matching experiments and researches, and the method has great significance for reducing the cost of the sintering ore. The existing sintering ore blending technology basically stays at the simple requirements of the components and the raw material cost of the sintering ore, generally, the ore blending is carried out on the basis of the chemical components of iron ore powder, basic sintering characteristics and the like, the components of the sintering ore can reach the control standard, but the metallurgical performance of the sintering ore cannot be guaranteed.
Disclosure of Invention
The invention aims to provide an ore blending method based on the metallurgical performance of sinter, which aims to solve the problem that the metallurgical performance of the existing sinter cannot be ensured.
The invention adopts the following technical scheme: a ore blending method based on sinter metallurgy performance comprises 70% of main stream fine ore, less than or equal to 20% of non-main stream fine ore and more than or equal to 10% of concentrate by mass percentage; wherein, TFe is more than or equal to 60 percent of the main flow fine ore, and TFe is less than 60 percent of the non-main flow fine ore;
the ore species in the main stream fine ore, the non-main stream fine ore and the concentrate satisfy the following structural mass percentages: less than or equal to 60 percent of limonite, more than or equal to 30 percent of hematite and more than or equal to 10 percent of magnetite; wherein the limonite comprises 15-25% of PB powder or Newman powder, 15-20% of Mike powder or golden baba powder and no more than 25% of super powder or printing powder; the content of Brazil mixed powder or south African powder in hematite is 30-40%.
Further, the main flow fine ore and the non-main flow fine ore comprise imported mineral powder and domestic secondary fine ore, and the component control standard of the imported mineral powder and the domestic secondary fine ore is as follows:
further, the standards for controlling harmful elements in fine ores and concentrates are as follows:
| item | Normal control range | Limit standard |
| Load of sulfur charged into furnace | Less than 4.0Kg/t iron | Less than 4.5Kg/t iron |
| Furnace zinc charging load | Less than 0.35Kg/t iron | Less than 0.4Kg/t iron |
| Alkali load in furnace | K2O+Na2O is less than 3.2Kg/t of iron | K2O+Na2O is less than 3.5Kg/t of iron |
| Furnace lead load | Less than 0.18Kg/t iron | Less than 0.2Kg/t iron |
The invention has the beneficial effects that: the method accords with the existing raw material conditions and the current situation of limited actual production of regional raw material supply of the enterprise; compared with the traditional mode, the ore blending standard reaching rate and the sinter quality are improved by adopting the method; the main economic and technical indexes are obviously improved by adopting the method; and fourthly, the production cost is reduced by adopting the invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The metallurgical properties of the sintered ore mainly include low temperature degradation index (RDI)+3.15) And Reducibility (RI).
1. Analysis of sinter composition and Low temperature degradation index (RDI)+3.15) The relationship (c) is shown in table 1 below:
TABLE 1
Al content, i.e. Al-Si ratio2O3Content and SiO2The ratio of the contents. Table 1 is analyzed as follows:
(1) the data sources are the detection records of the metallurgical performance of the sintering ore from 1 month to 6 months in 2020, wherein the sintering ore of the sintering machine A is 39 times, and the sintering ore of the sintering machine B is 33 times. The data analysis is only carried out by taking the process control and the production result as the reference, the influence factors outside the process control range are not excluded, and the RDI within the process control range can be considered+3.15Variations thereof are contemplated.
(2) The general theory is that under the condition of the same alkalinity, gangue content and mechanical stress of the sinter, Fe in the sinter203(including primary and secondary Fe)2O3) The content has close relation with RDI, Fe2O3The higher the content, the higher the RDI.
(3) Comparing the data A and B, and simultaneously feeding back the more obvious related trends of the same type, wherein TFe and TiO2The content shows negative correlation, and the content of CaO, MgO, R, MnO and aluminum shows positive correlation.
(4) Observation of TiO2The content curve shows that the sintered ore is TiO2Higher RDI is shown at a content of < 0.250%+3.15The content is more than 65%, and the titanium iron-containing material is used as the concentrate (TiO)2Content of 3-4%), new zealand sea sand (TiO)2Content 7-8%).
(5)Al2O3The content in the current control range (2.2-2.4%) generates a large and obvious positive correlation to the sintering ore RDI +3.15The internal control standard is less than or equal to 2.2 percent, and the sintered ore Al can be relaxed on the premise of not influencing the fluidity of the blast furnace slag2O3The content is controlled, and the adding amount of the high-aluminum low-price ore can be slightly increased.
(6) The MgO of the sintered ore and the RDI +3.15 control show relatively obvious positive correlation, and the better RDI index is obtained when the control is within the range of 2.0 +/-0.1 percent.
(7) Regression analysis formula:
first sintering machine sintering ore RDI+3.15The content is as follows:
＝-571.19+0.722*TFe+1.011*FeO+103.847*SiO2-52.184*CaO+12.939*MgO-1. 820*Al2O3+286.656*R
sintering machine B sintering machine sintering ore RDI+3.15The content is as follows:
＝-207.075-3.053*TFe+1.211*FeO+78.334*SiO2-45.879*CaO+8.073*MgO+19. 620*Al2O3+222.903*R。
2. analysis of ore blending Structure and Low temperature degradation index (RDI)+3.15) The relationship (c) is shown in table 2 below:
TABLE 2
(1) RDI of sinter+3.15The ratio of the limonite to the limonite shows a relative trend of high middle and low two sides in a coordinate axis curve expressed by a relative formula, which shows that the ratio of the limonite in the ingredients is stabilized at 50-55 percent, and better RDI is obtained+3.15。
(2) RDI of sinter+3.15The coordinate axis curves expressed by the related formulas show the related tendency of low middle and high two sides, which indicates that the proportion of magnetite in the ingredients is stabilized at more than 15%, and better RDI is obtained+3.15。
3. The relationship between the sintered ore composition and the high temperature Reducibility (RI) was analyzed as shown in Table 3 below:
TABLE 3
| Item | Linear correlation formula | Determination of the coefficient R2 | Coefficient of correlation R |
| TFe | y＝2.987x-97.92 | 0.056 | 0.237 |
| FeO | y＝-4.831x+112.7 | 0.155 | -0.394 |
| SiO2 | y＝-8.217x+111.2 | 0.117 | -0.342 |
| CaO | y＝-8.153x+152.8 | 0.282 | -0.531 |
| MgO | y＝23.11x+22.54 | 0.122 | 0.349 |
| Al2O3 | y＝-22.77x+120.0 | 0.192 | -0.438 |
| Alkalinity of | y＝-16.91x+101.5 | 0.015 | -0.122 |
| MnO | y＝-35.02x+82.45 | 0.127 | -0.356 |
| TiO2 | y＝-29.46x+76.23 | 0.048 | -0.219 |
| Alkali metal | y＝-142.7x+87.14 | 0.148 | -0.385 |
| Degree of aluminium | y＝-29.85x+81.05 | 0.014 | -0.118 |
Wherein the aluminum degree is the ratio of aluminum to silicon, Al2O3Content and SiO2The ratio of the contents. Table 3 is analyzed as follows:
(1) data analysis finds the content ranges of RI, TFe and MgO of the sinterPositive correlation; with FeO, SiO2、 CaO、Al2O3Alkalinity, MnO, TiO2The alkali metal and the aluminum degree are all in negative correlation.
(2) When the sintered ore is produced, the MgO content must be ensured to be 2.0 +/-0.1 percent.
(3) Empirical formula: sinter RI
＝163.545-40.891*TFe+23.488*FeO+512.010*SiO2-318.117*CaO-74.866*MgO -58.933*Al2O3+1444.752*R。
Through the above analysis, the following conclusions are reached:
1. sinter TFe and TiO2The content is in negative correlation, and the content of CaO, MgO, R, MnO and aluminum is in positive correlation.
2. Sintered TiO ore2Higher RDI is shown at a content of < 0.250%+3.15The content is more than 65%, and the titanium iron-containing material is used as the concentrate (TiO)2Content of 3-4%), new zealand sea sand (TiO)2Content 7-8%).
3. Sintered ore Al2O3The content is controlled to be in the range of 2.2-2.4 percent and the RDI of the sinter+3.15Has relatively obvious positive correlation, and can properly relax the Al content in the sinter under the premise of not influencing the fluidity of the blast furnace slag2O3The content is controlled, and the dosage of the low-valence iron ore powder with higher aluminum content can be slightly increased.
4. Sintered ore MgO and RDI+3.15The control shows relatively obvious positive correlation, and better RDI is obtained when the control is within the range of 2.0 +/-0.1 percent+3.15And (4) indexes.
5. The limonite proportion in the ingredients is stabilized at 50-55%, and better RDI is obtained+3.15。
6. The proportion of magnetite in the mixture is stabilized to be more than 15 percent, and better RDI is obtained+3.15。
7. The TFe and MgO contents of the sintered ore are positively correlated with RI; with FeO, SiO2、CaO、Al2O3Alkalinity, MnO, TiO2The alkali metal and the aluminum degree are all in negative correlation.
In conclusion, the ore blending method based on the performance of sintering, mining and metallurgy is adopted, and the method comprises the following steps:
the ore concentrate comprises 70 mass percent of main flow fine ore, less than or equal to 20 mass percent of non-main flow fine ore and more than or equal to 10 mass percent of ore concentrate; wherein, TFe is more than or equal to 60 percent of the main flow fine ore, and TFe is less than 60 percent of the non-main flow fine ore; TFe is total iron.
The ore species in the main flow fine ore, the non-main flow fine ore and the concentrate satisfy the following structural mass percentages: less than or equal to 60 percent of limonite, more than or equal to 30 percent of hematite and more than or equal to 10 percent of magnetite; wherein the limonite comprises 15-25% of PB powder or Newman powder, 15-20% of Mike powder or golden baba powder and no more than 25% of super powder or printing powder; the content of the Brazil mixed powder or the south African powder in the hematite is 30-40%.
In some embodiments, the main-flow fine ore and the non-main-flow fine ore include imported ore powder and domestic secondary fine ore, and the composition control standards of the imported ore powder and the domestic secondary fine ore are as follows in table 4:
TABLE 4
In some embodiments, the standards for the control of harmful elements in fine ores and concentrates are as follows in table 5:
TABLE 5
| Item | Normal control range | Limit standard |
| Load of sulfur charged into furnace | Less than 4.0Kg/t iron | Less than 4.5Kg/t iron |
| Furnace zinc charging load | Less than 0.35Kg/t iron | Less than 0.4Kg/t iron |
| Alkali load in furnace | K2O+Na2O is less than 3.2Kg/t of iron | K2O+Na2O is less than 3.5Kg/t of iron |
| Furnace lead load | Less than 0.18Kg/t iron | Less than 0.2Kg/t iron |
For the sintered ore prepared by the ore blending method based on the metallurgical performance of the sintered ore, the component control standard is as follows:
TABLE 6
By analyzing the influence factors of the performance of the sintered ore and the combination of the characteristics of performance difference and performance complementation between the iron ore powder and the like, the ore blending method based on the performance of the sintered ore and the metallurgy reasonably utilizes the iron ore powder of different types, promotes the performance improvement of the sintered ore and the metallurgy and reduces the production cost.
According to the invention, by researching influence factors of the performance of the sintered ore metallurgy, combining characteristics of performance difference and performance complementation between iron ore powders and the like, fuzzy control is adopted, a sintering cup is utilized to debug ore blending structure adjustment, the performance of the sintered ore metallurgy is further measured, and the internal relation between the measured performance and the components and the ore blending structure of the sintered ore metallurgy is analyzed, so that an ore blending method based on the performance of the sintered ore metallurgy is formed, the performance of the sintered ore metallurgy is promoted to be improved, and the production cost is reduced. The invention reasonably utilizes different types of iron ore powder to form the ore blending method based on the performance of sintering ore metallurgy. The invention provides necessary guidance for sintering production and ore blending by combining the existing raw material conditions, the regional limitation of raw material supply and the actual production current situation of an enterprise, and compared with the traditional method, the ore blending standard reaching rate and the quality of the sintered ore are improved, the metallurgical performance of the sintered ore is promoted to be improved, and the production cost is reduced.
Claims (3)
1. A ore blending method based on sinter metallurgy performance is characterized by comprising 70% of main stream fine ore, less than or equal to 20% of non-main stream fine ore and more than or equal to 10% of concentrate by mass percent; wherein, TFe is more than or equal to 60 percent of the main flow fine ore, and TFe is less than 60 percent of the non-main flow fine ore;
the ore species in the main flow fine ore, the non-main flow fine ore and the concentrate satisfy the following structural mass percentages: less than or equal to 60 percent of limonite, more than or equal to 30 percent of hematite and more than or equal to 10 percent of magnetite; wherein the limonite comprises 15-25% of PB powder or Newman powder, 15-20% of Mike powder or golden baba powder and no more than 25% of super powder or printing powder; the content of the Brazil mixed powder or the south African powder in the hematite is 30-40%.
2. The ore blending method based on agglomerate metallurgy performance of claim 1, wherein the main flow fine ores and the non-main flow fine ores comprise import ore powder and domestic secondary fine ores, and the ingredient control standards of the import ore powder and the domestic secondary fine ores are as follows:
3. a method of ore blending based on the properties of sinter metallurgy according to claim 1 or claim 2, wherein the standards for the control of harmful elements in the ore fines and concentrate are as follows:
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Application publication date: 20210806 |