CN113817919A - Sintered ore for improving production quality by controlling grain size of high-silicon flux and method thereof - Google Patents
Sintered ore for improving production quality by controlling grain size of high-silicon flux and method thereof Download PDFInfo
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- 230000004907 flux Effects 0.000 title claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 20
- 239000010703 silicon Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000843 powder Substances 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 35
- 239000000292 calcium oxide Substances 0.000 claims abstract description 33
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 33
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims abstract description 30
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 27
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 27
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 27
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 27
- 239000012141 concentrate Substances 0.000 claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 20
- 235000019738 Limestone Nutrition 0.000 claims abstract description 15
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006028 limestone Substances 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 235000010755 mineral Nutrition 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 8
- 239000010459 dolomite Substances 0.000 claims description 6
- 229910000514 dolomite Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 13
- 239000007791 liquid phase Substances 0.000 description 9
- 230000033558 biomineral tissue development Effects 0.000 description 5
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005728 strengthening Methods 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sintered ore for improving production quality by controlling the grain diameter of a high-silicon flux, which comprises the following raw materials in percentage by weight: low SiO with K2O, Na2O, F240-50% of iron ore concentrate, 35-40% of Australian No. 1 powder, 10-15% of Australian No. 2 powder, 5.0% +/-0.1% of sintered ore SiO2, 10.2% +/-0.1% of sintered ore CaO, 2.0% +/-0.1% of sintered ore MgO, 3.0-3.5% of quicklime, 9-10% of limestone, 4.10-4.20% of coke powder and 2.0-2.5% of serpentine; a method of improving the quality of sintered mineral products by controlling the particle size of the high silicon flux is also disclosed. The invention realizes the obvious improvement of the drum strength and the metallurgical performance, greatly improves the yield and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of iron-making raw material agglomeration, in particular to a sintered ore for improving the production quality by controlling the grain diameter of a high-silicon flux.
Background
The high alkalinity sintering ore has the advantages of high strength, good reducibility, excellent reflow behavior and the like, and is a main artificial rich ore. Besides hematite and magnetite separated out by recrystallization at high temperature, the ferrite is an important bonding phase component. In the sintering process, the generation of ferrite is related to factors such as the variety of iron ore powder, the structure of a flux, the sintering temperature, the atmosphere of a material layer and the like. The ferrite is melted and reacted at high temperature to form a flowing liquid phase with binding capacity, and plays a vital role in the consolidation of the sintered quasi-particles.
Under the sintering production conditions, the sintering behavior characteristics of the coarse particles and the fine particles of the iron ore powder are different. For fine-particle adhesive powder, in which iron ore powder is in close contact with flux, fuel and the like, a liquid phase is generated from the part, and then assimilation and fusion are performed, because the sintering process is fast, the liquid phase generated by the adhesive powder layer often determines the flowing and bonding capabilities of the adhesive liquid phase, so that the generated liquid phase is required to have good flowing and bonding properties, and the optimal design of the adhesive powder component is required to be performed based on the requirement of strengthening the generation of the adhesive powder liquid phase.
Because the Bady steel-coated Bayan Obo concentrate is the concentrate containing K2O, Na2O and F iron, the SiO2 content is lower, the granularity is superfine, in order to ensure that the SiO2 content of the sinter is controlled to be 5.0 percent in the sintering process, 1 to 3 percent of serpentine is added to adjust the SiO2 content of the sinter, the granularity of the serpentine is required to be less than or equal to 3mm and reach 100 percent, the serpentine is completely mineralized into a liquid phase in the sintering process, and the generation, the flow and the bonding performance of the calcium ferrite of the Bady steel-coated sinter are deteriorated. Based on the method, according to the optimal design concept of the components of the adhesive powder, the sintering technology development that partial SiO2 in the adhesive powder is transferred to nuclear particles by increasing the particle size of serpentine and reducing the reaction kinetic conditions of the serpentine and alkaline flux mineralization is carried out, and the purposes of improving the sintering production process and the quality of sintered mineral products can be realized.
Disclosure of Invention
In order to solve the technical problems, the sintered ore with good production quality index and better metallurgical performance and the process control method thereof are developed aiming at the actual production condition of adding serpentine to adjust the SiO2 content of the sintered ore.
In order to solve the technical problems, the invention adopts the following technical scheme:
a sintered ore for improving production quality by controlling the grain diameter of a high-silicon flux comprises the following raw materials in percentage by weight: low SiO with K2O, Na2O, F240-50% of iron ore concentrate, 35-40% of Australian No. 1 powder, 10-15% of Australian No. 2 powder, 5.0% + -0.1% of sintered ore SiO2, 10.2% + -0.1% of sintered ore CaO and 2.0% + -0.1% of sintered ore MgO3.0-3.5% of quicklime, 9-10% of limestone, 4.10-4.20% of coke powder and 2.0-2.5% of serpentine.
Further, the said compound contains K2O、Na2O, F Low SiO2The iron ore concentrate comprises the following chemical components in percentage by weight: 65.0 to 66.6 percent of TFe, 27.0 to 31.0 percent of FeO, 0.87 to 1.30 percent of MgO, 0.8 to 1.95 percent of CaO, less than or equal to 0.2 percent of Al2O3, and SiO21.05 to 2.04%, K2O≤0.15％，Na20.05 to 0.20 percent of O and 0.25 to 0.50 percent of F; and the concentrate with the granularity less than or equal to 0.074mm in the first iron concentrate accounts for at least 90 percent of the total weight of the first iron concentrate.
Further, the Australian No. 1 powder comprises the following chemical components in percentage by weight: 59.5 to 61.5 percent of TFe, less than or equal to 0.5 percent of FeO, 0.10 to 0.20 percent of MgO, 0.01 to 0.15 percent of CaO, and Al2O32.0-2.5% of SiO23.5-4.5%, K2O≤0.02％，Na2O is less than or equal to 0.02 percent, and F is less than or equal to 0.05 percent; and the percentage of the concentrate with the granularity less than or equal to 3mm in the No. 1 Australian powder in the total weight of the No. 1 Australian powder is 50-55%.
Further, the Australian No. 2 powder comprises the following chemical components in percentage by weight: 58.0 to 58.30 percent of TFe, less than or equal to 0.5 percent of FeO, 0.05 to 0.10 percent of MgO, 0.01 to 0.10 percent of CaO, and Al2O3≤2.2-2.6％，SiO25.0-5.5%, K2O≤0.02％，Na2O is less than or equal to 0.02 percent, and F is less than or equal to 0.05 percent; and the percentage of the concentrate with the granularity less than or equal to 3mm in the No. 2 Australian powder in the total weight of the No. 2 Australian powder is 45-50%.
Further, the quick lime comprises the following components in percentage by weight: SiO22≤4.0％，CaO≥84％，MgO≥3.5％，Al2O3More than or equal to 12 percent, wherein the percentage of the fine grinding powder with the granularity less than or equal to 3mm in the quicklime mineral accounts for 100 percent of the total weight of the quicklime;
the digested dolomite comprises the following components in percentage by weight: SiO2 is less than or equal to 2.0 percent, CaO is more than or equal to 29.0 percent, MgO is more than or equal to 20 percent, Ig is less than or equal to 40 percent, and the percentage of the fine ground powder with the granularity less than or equal to 3mm in the digested dolomite accounts for more than or equal to 85 percent of the total weight of the digested dolomite;
the limestone comprises the following components in percentage by weight: SiO22Not more than 2.0 percent, not less than 29.0 percent of CaO, not less than 20 percent of MgO, not more than 40 percent of Ig, and the percentage of the fine grinding powder with the granularity not more than 3mm in the limestone minerals in the total weight of the limestone is not less than 85 percent;
the serpentine comprises the following components in percentage by weight: SiO2235.0 percent or more, 35.0 percent or more of MgO, 1.00 percent or less of CaO and 13.0 percent or less of Ig. Based on the requirement of improving the quality index of sintered ore, the percentage of the fine grinding powder with the granularity smaller than or equal to 3mm in the serpentine mineral to the total weight of the serpentine is 100 percent, the average grain diameter is adjusted to be 6mm, and the grain diameter is adjusted to be 5mm-7 mm.
Further, the coke powder comprises the following components in percentage by weight: SiO22Not more than 8.0 percent, not less than 85.0 percent of fixed carbon, not more than 1.00 percent of CaO, not less than 85.0 percent of Ig, and the percentage of the fine grinding powder with the granularity not more than 3mm in the limestone minerals in the total weight of the limestone is not less than 85 percent.
Further, the K content is calculated according to the weight percentage2O、Na2O, F Low SiO2 iron ore concentrate50 percent of the Australian 1# powder, 10 percent of the Australian 2# powder, 5.0 percent +/-0.1 percent of sintered ore SiO2, 10.2 percent +/-0.1 percent of sintered ore CaO, 2.0 percent +/-0.1 percent of sintered ore MgO, 9.50 percent of limestone, 3.50 percent of quicklime, 2.3 percent of serpentine and 4.15 percent of coke powder.
A method for improving the quality of sintered mineral products by controlling the particle size of a high silicon flux comprising the steps of:
the preparation of the iron-containing raw material and the flux is realized according to the proportion, the raw material and the flux are fully mixed in a primary mixer to obtain a mixture, and the mixture is granulated in a granulator; the method specifically comprises the following steps:
loading the mixture into a sintering device through a material distribution device;
igniting, sintering, cooling and other processes of the raw mixture by a sintering machine to finally obtain sintered ore which is prepared by using fluorine-containing low-silicon iron concentrate and has high quality and low silicon content;
the ignition conditions are as follows: the temperature is 950 ℃ and 1050 ℃; the sintering conditions are as follows: the material layer thickness is 690-710mm, the vertical sintering speed is 16 +/-1 mm/min, the main pipe negative pressure is 10-11.5Kpa, and the end point temperature is 320-350 ℃.
Compared with the prior art, the invention has the beneficial technical effects that:
for high proportion of K2O、Na2O, F Low SiO2Sinter produced from iron ore concentrate and addition of serpentine to adjust SiO of sinter2The actual production condition of the content is realized by increasing the grain diameter of the serpentine and reducing the mineralization reaction kinetic condition of the serpentine and the alkaline flux, so that part of SiO in the adhesive powder is obtained2The technical means of transferring to the nuclear particles realizes the obvious improvement of the drum strength and the metallurgical performance, greatly improves the yield and reduces the production cost.
Detailed Description
The following examples further illustrate embodiments of the present invention, but the embodiments of the present invention are not limited to the following examples.
The raw material composition, raw material configuration, finished ore composition, sintering process index and sintered ore metallurgical performance of the sintered ores prepared in the comparative example and the example are respectively shown in tables 1 to 5.
Table 1 raw material chemical composition%
TABLE 2 raw material configuration scheme of examples and comparative examples
As can be seen from Table 2: the chemical compositions of the batch structures and the sintered minerals of the examples and the comparative examples are completely consistent, and the difference between the examples and the comparative examples is that the grain size of the serpentine is increased.
TABLE 3 examples and comparative examples sinter minerals chemical compositions
As can be seen from Table 3: the chemical analysis errors of the sintered ores are considered, and the chemical compositions of the sintered ores in the examples and the comparative examples are basically consistent.
TABLE 4 change in the sintering process indexes of comparative examples and examples%
As can be seen from Table 4:
(1) 50% of K2O、Na2O, F and low-silicon concentrate, when the CaO content of the sinter reaches 10.2 +/-0.1 percent and the SiO content reaches2When the content is 5.0 +/-0.1, the particle size of the serpentine is increased, the dynamic condition of mineralization reaction of the serpentine and an alkaline flux is reduced, and partial SiO in the adhesive powder is achieved2The drum strength of the sintered ore is 72.24 percent, which is improved by 4.27 percent compared with the comparative example; the fuel consumption is 64.15kg/t, which is reduced by 4.99kg/t compared with the comparative example; the yield is 70.78%, and is improved by 4.76 percentage points compared with the comparative example; the utilization coefficient reaches 1.13t/m2H is 0.06t/m higher than that of the comparative example2·h。
(2) Illustrates that the prior steel-clad sintering production controls SiO2The mode has the problems that partial SiO in the adhesive powder is achieved by increasing the particle size of the serpentine and reducing the mineralization reaction kinetic condition of the serpentine and an alkaline flux2Technological means for transferring to nuclear particles, reducing SiO2The influence on the quality of the liquid phase of the sintering ore can obviously improve the generation capacity, the fluidity and the caking property of the calcium ferrite of the sintering ore.
TABLE 5 metallurgical properties of the comparative and example sintered ores%
As can be seen from Table 5:
compared with the comparative example, after the large-particle-size serpentine is added, the reducibility of the sinter is improved by 6.78 percent, the dropping interval is reduced by 47 ℃, the metallurgical performance of the sinter is obviously improved, which also shows that the serpentine is increasedThe particle size of the stone is reduced, the reaction kinetic condition of the stone and the alkaline flux is reduced, and partial SiO in the adhesive powder is achieved2Technological means for transferring to nuclear particles, reducing SiO2The influence on the liquid phase quality of the sintering ore obviously improves the generation amount of the calcium ferrite with high reducibility in the sintering ore.
In summary, for high ratio of K2O、Na2O, F Low SiO2Sinter produced from iron ore concentrate and addition of serpentine to adjust SiO of sinter2The actual production condition of the content is realized by increasing the grain diameter of the serpentine and reducing the mineralization reaction kinetic condition of the serpentine and the alkaline flux, so that part of SiO in the adhesive powder is obtained2The technical means of transferring to the nuclear particles realizes the optimized design of the components of the adhesive powder, the calcium ferrite generating capacity reaches a better level, the drum strength and the metallurgical performance of the sinter are obviously improved, the yield is greatly improved, and the production cost is reduced.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. A sintered ore for improving the production quality by controlling the grain diameter of a high-silicon flux is characterized in that: the raw materials comprise the following components in percentage by weight: low SiO with K2O, Na2O, F240-50% of iron ore concentrate, 35-40% of Australian No. 1 powder, 10-15% of Australian No. 2 powder, 5.0% +/-0.1% of sintered ore SiO2, 10.2% +/-0.1% of sintered ore CaO, 2.0% +/-0.1% of sintered ore MgO, 3.0-3.5% of quicklime, 9-10% of limestone, 4.10-4.20% of coke powder and 2.0-2.5% of serpentine.
2. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: said group containing K2O、Na2O, F Low SiO2The chemical components of the iron ore concentrate are in percentage by weightThe method comprises the following steps: 65.0 to 66.6 percent of TFe, 27.0 to 31.0 percent of FeO, 0.87 to 1.30 percent of MgO, 0.8 to 1.95 percent of CaO, less than or equal to 0.2 percent of Al2O3, and SiO21.05 to 2.04%, K2O≤0.15％，Na20.05 to 0.20 percent of O and 0.25 to 0.50 percent of F; and the concentrate with the granularity less than or equal to 0.074mm in the first iron concentrate accounts for at least 90 percent of the total weight of the first iron concentrate.
3. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: the Australian No. 1 powder comprises the following chemical components in percentage by weight: 59.5 to 61.5 percent of TFe, less than or equal to 0.5 percent of FeO, 0.10 to 0.20 percent of MgO, 0.01 to 0.15 percent of CaO, and Al2O32.0-2.5% of SiO23.5-4.5%, K2O≤0.02％，Na2O is less than or equal to 0.02 percent, and F is less than or equal to 0.05 percent; and the percentage of the concentrate with the granularity less than or equal to 3mm in the No. 1 Australian powder in the total weight of the No. 1 Australian powder is 50-55%.
4. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: the Australian No. 2 powder comprises the following chemical components in percentage by weight: 58.0 to 58.30 percent of TFe, less than or equal to 0.5 percent of FeO, 0.05 to 0.10 percent of MgO, 0.01 to 0.10 percent of CaO, and Al2O3≤2.2-2.6％，SiO25.0-5.5%, K2O≤0.02％，Na2O is less than or equal to 0.02 percent, and F is less than or equal to 0.05 percent; and the percentage of the concentrate with the granularity less than or equal to 3mm in the No. 2 Australian powder in the total weight of the No. 2 Australian powder is 45-50%.
5. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: the quick lime comprises the following components in percentage by weight: SiO22≤4.0％，CaO≥84％，MgO≥3.5％，Al2O3More than or equal to 12 percent, wherein the percentage of the fine grinding powder with the granularity less than or equal to 3mm in the quicklime mineral accounts for 100 percent of the total weight of the quicklime;
the digested dolomite comprises the following components in percentage by weight: SiO2 is less than or equal to 2.0 percent, CaO is more than or equal to 29.0 percent, MgO is more than or equal to 20 percent, Ig is less than or equal to 40 percent, and the percentage of the fine ground powder with the granularity less than or equal to 3mm in the digested dolomite accounts for more than or equal to 85 percent of the total weight of the digested dolomite;
the limestone comprises the following components in percentage by weight: SiO22Not more than 2.0 percent, not less than 29.0 percent of CaO, not less than 20 percent of MgO, not more than 40 percent of Ig, and the percentage of the fine grinding powder with the granularity not more than 3mm in the limestone minerals in the total weight of the limestone is not less than 85 percent;
the serpentine comprises the following components in percentage by weight: SiO2235.0 percent or more, 35.0 percent or more of MgO, 1.00 percent or less of CaO and 13.0 percent or less of Ig. Based on the requirement of improving the quality index of sintered ore, the percentage of the fine grinding powder with the granularity of less than or equal to 3mm in the serpentine mineral to the total weight of the serpentine is 100 percent, and the particle size is adjusted to be 5mm-7 mm.
6. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: the coke powder comprises the following components in percentage by weight: SiO22Not more than 8.0 percent, not less than 85.0 percent of fixed carbon, not more than 1.00 percent of CaO, not less than 85.0 percent of Ig, and the percentage of the fine grinding powder with the granularity not more than 3mm in the limestone minerals in the total weight of the limestone is not less than 85 percent.
7. The sintered ore of claim 1 with improved yield quality by controlling the high silicon flux particle size, characterized by: according to weight percentage, the content of K2O、Na2O, F Low SiO2 iron ore concentrate50 percent of the Australian 1# powder, 10 percent of the Australian 2# powder, 5.0 percent +/-0.1 percent of sintered ore SiO2, 10.2 percent +/-0.1 percent of sintered ore CaO, 2.0 percent +/-0.1 percent of sintered ore MgO, 9.50 percent of limestone, 3.50 percent of quicklime, 2.3 percent of serpentine and 4.15 percent of coke powder.
8. The method of claim 1 for improving the quality of sintered mineral products by controlling the particle size of the high silicon flux, wherein: the method comprises the following steps:
the preparation of the iron-containing raw material and the flux is realized according to the proportion, the raw material and the flux are fully mixed in a primary mixer to obtain a mixture, and the mixture is granulated in a granulator; the method specifically comprises the following steps:
loading the mixture into a sintering device through a material distribution device;
igniting, sintering, cooling and other processes of the raw mixture by a sintering machine to finally obtain sintered ore which is prepared by using fluorine-containing low-silicon iron concentrate and has high quality and low silicon content;
the ignition conditions are as follows: the temperature is 950 ℃ and 1050 ℃; the sintering conditions are as follows: the material layer thickness is 690-710mm, the vertical sintering speed is 16 +/-1 mm/min, the main pipe negative pressure is 10-11.5Kpa, and the end point temperature is 320-350 ℃.
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| CN202110898004.6A Pending CN113817919A (en) | 2021-08-05 | 2021-08-05 | Sintered ore for improving production quality by controlling grain size of high-silicon flux and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622088A (en) * | 2022-02-28 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for controlling particle size of limestone for producing sintered ore by adding high-proportion potassium, sodium and fluorine iron concentrate |
| CN114622089A (en) * | 2022-03-02 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Sintered ore ingredient for preparing composite flux by using combination of silica and dolomite to replace serpentine for flux structure adjustment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195337A (en) * | 2020-09-25 | 2021-01-08 | 包头钢铁（集团）有限责任公司 | Sintered ore for improving production quality by controlling grain size of high-silicon flux and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195337A (en) * | 2020-09-25 | 2021-01-08 | 包头钢铁（集团）有限责任公司 | Sintered ore for improving production quality by controlling grain size of high-silicon flux and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 梁训裕等: "《氧气顶吹转炉炼钢用耐火材料》", vol. 1, 中国工业出版社, pages: 112 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622088A (en) * | 2022-02-28 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for controlling particle size of limestone for producing sintered ore by adding high-proportion potassium, sodium and fluorine iron concentrate |
| CN114622089A (en) * | 2022-03-02 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Sintered ore ingredient for preparing composite flux by using combination of silica and dolomite to replace serpentine for flux structure adjustment |
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