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Blending method capable of effectively improving quality of uniformly-mixed ores

A technology of mixing ore and quality, which is applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of large composition differences and composition differences of different mineral types, and achieve the effects of less investment, easy operation, and obvious quality improvement

Active Publication Date: 2015-04-29
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking the applicant as an example, since he has no mine and no stable ore resources in the surrounding area, he is basically in a state of eating a lot of food. There are many kinds of ore blending minerals, and there are even no skeleton minerals that can play a certain supporting role. Not only are they different The composition of the mineral species is quite different, so that there will be very large compositional differences when sampling the same mineral species at different locations

Method used

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  • Blending method capable of effectively improving quality of uniformly-mixed ores
  • Blending method capable of effectively improving quality of uniformly-mixed ores
  • Blending method capable of effectively improving quality of uniformly-mixed ores

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Taking 251# stockpiles as an example, the physical properties and chemical analysis of various minerals are shown in Table 1:

[0035] Table 1: 251# stockpile ratio

[0036]

[0037] A. Raw material preparation:

[0038] 1) According to Table 1, small minerals with a heaping ratio of about 5% or less: Burma fine, Jiangfeng fine, Longyuan 52 powder, wet iron powder, Xinhongyuan 57 powder, Lao powder and peripheral powder: Junyuan 50 powder, sliver miscellaneous ore, Longyuan 52 powder and Xinhongyuan 57 powder shall be pre-mixed within three days; , it can be concluded that the total amount of premixed stockpiles is 26800t; the total amount of new iron stock in 251# stockpiles is 72000t, and the above small and unstable minerals account for 41% of the total amount of new iron stockpiles, which is 29520t; When stacking, according to step C: the priority order of the difference in the composition of each batching mineral is: SiO 2 > TFe > Moisture > Particle Size, ca...

Embodiment 2

[0062] Taking 252# stockpiles as an example, the physical properties and chemical analysis of various minerals are shown in Table 8:

[0063] Table 8: 252# stockpile ratio

[0064]

[0065] A. Raw material preparation:

[0066] 1) According to Table 8, small minerals with a heaping ratio of about 5% or less: Longyuan 59 fine, Jiangfeng fine, Longyuan 52 fine, Panlongshan fine, Longyuan 40 fine, Xinhongyuan 57 fine and peripheral Mixing powder: Junyuan 50 powder, Longyuan 52 powder, Xinhongyuan 57 powder and unstable minerals: Magnetic separation iron powder pre-mixing and piling within three days; pre-mixing piling operation rate is 80%; #The total amount of new iron material in the pile is 72,000t, and the above small and unstable minerals account for 43% of the total amount of new iron material, which is 30,960t; when building a premixed pile, according to step C: the difference in the composition of each batching mineral The order of priority is: SiO 2 > TFe > Moistur...

Embodiment 3

[0090] Taking 253# stockpiles as an example, the physical properties and chemical analysis of various minerals are shown in Table 15:

[0091] Table 15: 253# stockpile ratio

[0092]

[0093] A. Raw material preparation:

[0094] 1) According to Table 15, small minerals with a heaping ratio of about 5% or less: Longyuan 51 powder, Junyuan 54 powder, Longyuan 50 powder, Jiangfeng Refining, oxidized slag, strip miscellaneous ore, magnetic iron separation Powder, mixed powder and unstable minerals: Junyuan 50 powder, Longyuan 50 powder, Longyuan 51 powder, strip miscellaneous ore, and magnetic separation iron powder are pre-mixed and mixed within three days; pre-mixed heap operation The total amount of new iron material in the 253# stockpile is 72,000t, and the above small and unstable minerals account for 57% of the total amount of new iron material, which is 41,040t; when building a premixed heap, follow Step C: each The priority order of the difference in the composition ...

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Abstract

The invention discloses a blending method capable of effectively improving the quality of uniformly-mixed ores. The method is characterized by comprising the following steps: preparing raw materials, namely performing pre-mixing and stacking on a small ore and a peripheral blending ore; preparing storage bins, wherein the number of the equipped blending storage bins is equal to stacked material layer number / stacking layer number + X, wherein X is more than or equal to 0; filling the storage bins with raw materials, namely filling the blending ores with large compositional differences in two adjacent storage bins according to a priority order of compositional differences: SiO2>TFe>water content>particle size; and stacking when the feeding quantity of stacking approaches a lower limiting value of the feeding quantity under the condition of meeting production requirements, wherein the lower limiting value of the feeding quantity is equal to the lower limiting value of the measuring range of the blending storage bins multiplies the number of the blending storage bins. According to the blending method disclosed by the invention, by controlling blending, uniform mixing and stacking, the effects of interpenetration and uniform mixing among the materials are improved, the standard deviations of SiO2 and TFe of the ores uniformly mixed by a sintering machine are obviously reduced, and the uniformly-mixed ores are greatly promoted in stability of particle size, water content, chemical composition and the like.

Description

technical field [0001] The invention belongs to the technical and economic field of blast furnace smelting, and relates to a batching method capable of effectively improving the quality of sintered and mixed ore, which is easy to operate, low in cost, and obviously improves the quality of mixed ore. Background technique [0002] Due to the SiO of the mixed ore in the sintering process 2 The fluctuation affects the basicity of sinter (CaO / SiO 2 ), while the fluctuation of TFe affects the stability of iron content of sinter. Therefore, supplying the sintering machine with mixed ore with stable grade and particle size plays a vital role in reducing the number of sintering batching tanks, simplifying the operation of sintering batching, and stabilizing the quality of sintering ore, which is conducive to the long-term stability and high output of the blast furnace. , High quality provides the best raw material conditions. Mixing and stacking is the most critical step to improv...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 普欣荣周伟移小义
Owner WUKUN STEEL
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