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A batching method that can effectively improve the quality of mixed ore

A technology for mixing ore and quality, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of composition differences and large differences in the composition of different minerals, and achieve the effects of simple operation, less investment, and improved stability

Active Publication Date: 2016-07-13
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A batching method that can effectively improve the quality of mixed ore
  • A batching method that can effectively improve the quality of mixed ore
  • A batching method that can effectively improve the quality of mixed ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] Table 1: 251# stock pile ratio

[0036]

[0037] A. Raw material preparation:

[0038] 1) According to Table 1, compare small minerals with a pile-making ratio of about 5% or less: Burmese fine, Jiangfeng fine, Longyuan 52 powder, wet iron powder, Xinhongyuan 57 powder, Laos powder and peripheral powder: Junyuan 50 powder, Liutiao miscellaneous ore, Longyuan 52 powder, and Xinhongyuan 57 powder are pre-mixed and piled within three days; the pre-mixed pile-building operation rate is 80%, and the pile-making and loading volume is 700t / h , It can be concluded that the total amount of the premixed pile is 26800t; the total amount of new iron material in the 251# pile is 72000t, and the above small ores and unstable minerals account for 41% of the total amount of the new iron pile, which is 29520t; When stacking, according to step C: th...

Embodiment 2

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

[0063] Table 8: 252# stock pile ratio

[0064]

[0065] A. Raw material preparation:

[0066] 1) According to Table 8, compare small minerals with a pile-making ratio of about 5% or less: Longyuan 59 fine, Jiangfeng fine, Longyuan 52 powder, Panlongshan fine, Longyuan 40 powder, Xinhongyuan 57 powder and peripheral Blending powder: Junyuan 50 powder, Longyuan 52 powder, Xinhongyuan 57 powder and unstable minerals: pre-mixed pile building with magnetic separation iron powder within three days; pre-mix pile building operation rate is 80%; 252 # Material pile The total amount of new iron material is 72000t, the above small ores and unstable minerals account for 43% of the total amount of new iron material, which is 30960t; when building the premixed pile, according to step C: the composition of each ingredient is different The priority is: SiO...

Embodiment 3

[0090] Take 253# stockpile ingredients as an example, the physical properties and chemical analysis of each mineral are shown in Table 15:

[0091] Table 15: 253# stockpile ratio

[0092]

[0093] A. Raw material preparation:

[0094] 1) According to Table 15, compare small minerals with a pile-making ratio of about 5% or less: Longyuan 51 powder, Junyuan 54 powder, Longyuan 50 powder, Jiangfeng fine, oxide slag, mixed ore, magnetic separation iron Powder and powder blending and unstable minerals: Junyuan 50 powder, Longyuan 50 powder, Longyuan 51 powder, Tiao miscellaneous ore, and magnetic separation iron powder are pre-mixed and mixed piles within three days; premix pile-making operations The rate is 80%; the total amount of new iron in the 253# stockpile is 72000t, and the above small ores and unstable minerals account for 57% of the total amount of the new iron stock, which is 41040t; when constructing the premixed pile, follow step C: each The priority order of the compositio...

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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 that can effectively improve the quality of sintered and mixed ore with simple operation, low cost and obvious improvement in the quality of mixed ore. Background technique [0002] As the SiO of the ore is mixed during the sintering process 2 The fluctuation affects the alkalinity of sinter (CaO / SiO 2 ), and the fluctuation of TFe affects the stability of the iron content of the sinter. Therefore, the supply of mixed ore with stable grade and particle size to the sintering machine plays a vital role in reducing the number of sintering batching tanks, simplifying the operation of sintering batching, and stabilizing the quality of the sintered ore, which contributes to the long-term stability and high yield of the blast furnace. , High quality provides the best raw material conditions. Mixing and pile building is the most critical step to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 普欣荣周伟移小义
Owner WUKUN STEEL
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