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Method for energy conservation and emission reduction of manganese mineral powder sintering

A technology of energy saving and emission reduction and manganese ore powder, which is applied in the field of pyrometallurgy, can solve the problems of serious environmental pollution, high fuel consumption, and high energy consumption, and achieve the effects of improving combustion conditions, realizing energy saving and emission reduction, and reducing fuel consumption

Active Publication Date: 2014-11-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has high energy consumption and serious environmental pollution, and the fuel consumption in production is as high as 300kg / t 烧结矿 More than 30% return rate

Method used

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  • Method for energy conservation and emission reduction of manganese mineral powder sintering
  • Method for energy conservation and emission reduction of manganese mineral powder sintering
  • Method for energy conservation and emission reduction of manganese mineral powder sintering

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Select straw charcoal as an alternative fuel for coke powder. Before use, add water to the straw charcoal and fine-grained manganese dioxide (95% of the mass percentage of which is -0.045mm particle size) accounting for 2.5% by mass of the straw charcoal, and mix well After that, it is mixed with coke powder to obtain a mixed fuel. The mass percentage of straw charcoal instead of coke powder is 15%. The manganese ore powder, mixed fuel, and returned ore are batched, mixed, and granulated, and then distributed, ignited, sintered, and cooled to obtain the finished sintered ore. Under optimized conditions, the yield of sintered ore is 79.50%, and the utilization factor is 1.51t m -2 h -1 , sinter drum strength 59.85%, SO in sinter flue gas 2 The peak content is 1310ppm, NO x The peak content was 476 ppm. Compared with conventional sintering, the quality index of sintered ore is slightly improved, the consumption of solid fuel is reduced by 4.3% (calculated as fixed ca...

Embodiment 2

[0034] Select pine black charcoal as the substitute fuel of coke powder, before use, add water to the fine-grained manganese dioxide (98.8% of the mass percentage of -0.045mm particle size) of pine black charcoal and account for 3.2% of the mass percentage of pine black charcoal , After mixing, it is mixed with coke powder to obtain mixed fuel. The substitution mass percentage of pine black charcoal is 30%. The manganese ore powder, mixed fuel, and returned ore are batched, mixed, and granulated, and then distributed, ignited, sintered, and cooled to obtain the finished sintered ore. Under optimized conditions, the yield of sintered ore is 81.12%, and the utilization factor is 1.56t m -2 h -1 , sinter drum strength 60.82%, SO in sinter flue gas 2 The peak content is 1092ppm, NO x The peak value of the content is 424ppm (as attached figure 1 , attached figure 2 ). Compared with conventional sintering, the quality index of sintered ore is improved, the consumption of sol...

Embodiment 3

[0036] Select pine black charcoal as the alternative fuel of coke powder, before use, add water to the fine-grained manganese dioxide (98.8% of the mass percentage of -0.045mm particle size) of pine black charcoal and account for 4.0% of the mass percent of pine black charcoal , After mixing, it is mixed with coke powder to obtain mixed fuel. The substitution mass percentage of pine black charcoal is 40%. The manganese ore powder, mixed fuel, and returned ore are batched, mixed, and granulated, and then distributed, ignited, sintered, and cooled to obtain the finished sintered ore. Under optimized conditions, the yield of sintered ore is 80.68%, and the utilization factor is 1.53t m -2 h -1 , sinter drum strength 60.54%, SO in sinter flue gas 2 The peak content is 825ppm, NO x The peak value of the content is 361ppm (as attached figure 1 , attached figure 2 ). Compared with conventional sintering, the quality index of sintered ore is improved, the consumption of solid ...

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Abstract

The invention discloses a method for energy conservation and emission reduction of manganese mineral powder sintering. The method comprises the specific steps of fully and uniformly mixing biomass charcoal and coke powder according to a certain proportion to obtain mixed fuel, blending manganese mineral powder, the mixed fuel, return fines and a fusing agent, uniformly mixing, pelleting, distributing, igniting, sintering, cooling, and obtaining a finished sinter. According to the method, biomass charcoal fuel that is environment-friendly, low in price and high in renewability is used to partially replace the traditional fuel (the coke powder) for the manganese mineral powder sintering; a replacing proportion is 0%-65%; compared with the conventional sintering, on the premise that a quality index of sintering production is not reduced, the actual consumption of solid fuel is reduced obviously; and the emission amount of harmful gases such as SO2 and NOx in sintering flue gas is reduced greatly. With the method, the available sintering technological process is not changed basically; the operation is simple; the energy conservation and emission reduction of manganese mineral powder sintering production are achieved; and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the field of pyrometallurgy, and in particular relates to a method for sintering manganese ore powder for energy saving and emission reduction. Background technique [0002] my country's manganese ore resources are relatively abundant, mainly divided into two categories: manganese carbonate ore and manganese oxide ore. The salient features of domestic manganese ore are poor, fine, and miscellaneous. Most of them are lean manganese ore resources, accounting for about 93.6% of the total manganese ore reserves, and the content of Fe, P, Si and other impurity elements is relatively high. In order to effectively utilize the existing poor manganese ore resources, in recent years, my country's manganese industry has vigorously promoted the policy of "beneficiating and enriching poor manganese ores to achieve poverty and wealth". In addition, the intensity of manganese ores in southern my country is generally low. The large amount of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 张元波姜涛李光辉范晓慧罗伟游志雄郭宇峰杨永斌黄柱成李骞陈许玲甘敏苏子键刘兵兵赵熠
Owner CENT SOUTH UNIV