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Structure Optimization and Application Practice of Sinter Mixture in Chongqing Iron and Steel Company

Author: TangXueQuan
Tutor: LiuQingCai；ZhuBin
School: Chongqing University
Course: Metallurgical Engineering
Keywords: Sinter Mixture Optimization Application Practice
CLC: TF046.4
Type: Master's thesis
Year: 2008
Downloads: 113
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Abstract


Sinter production is one of the production process of the iron and steel metallurgy, the sinter mixture ratio is reasonable, not only affects the sinter yield, quality, and also have a decisive impact on the final cost of the sinter. At present, Chongqing Iron \u0026 Steel Co., Ltd. (hereinafter referred to as the \The premise of how heavy steel to meet the mixes ingredients controlled and raw materials inventory constraints, the sintering materials reasonably with mine, best mix with mine than to do with mine optimal cost, has a very important practical significance . According to production status and requirements of the heavy steel sintering plant, mainly Australian fine ore powder India, Brazil powder, domestic iron ore fines (Anhui powder, powder Hubei, Guangxi powder, the Qijiang powder), domestic concentrates (Liaoning Fine, Anhui fine Hubei Jing, Guangdong, fine, the Tibetan fine), the flux and back to mine for the sintered material, design optimization eight kinds of sinter mix with mine program. Analysis of heavy steel sinter raw material characteristics, high concentrate grade (TFe were greater than 65%), low impurities, significantly better than fine ore; imported ore powder of the highest performance in Brazil, domestic iron ore fines Hubei powder of the highest performance. By sintering laboratory sintering cup test, test analysis of the eight kinds of physical and chemical properties of the sintered ore and metallurgical properties. Sintering cup test program of eight kinds of ingredients on the design, the system of measurement and study, and the various properties of the sintered ore, the results show that the physical properties of the eight kinds of sintered ore, sintering process indicators, chemical properties and metallurgical properties in the the sinter production requirements range, the performance indicators to meet the production needs of the heavy steel sinter. The evaluation of the performance of the sinter composite score, S-5 sinter ore matching program, followed by S-1 sinter ore program. In the practice of heavy steel sintering plant, S-5 sinter ore matching program six months, the cumulative value data: Fe grade TFe 54.07%; FeO content of 7.97%; rate of 89.38% out of mine; return mine was 12.65 percent; effective utilization coefficient of 1.415; the tumble index of 76.1%; ≤ 10mm fraction is composed of 22.98%; vertical burning speed 19.5mm/min. S-1 sinter ore distribution program six months total value of the data: Fe grade TFe 53.99%; FeO content of 7.90%; rate of 89.96 percent out of mine; return fines was 12.65%; effective utilization coefficient of 1.317; drum index was 76.5%; ≤ 10mm fraction is composed of 25.92%; vertical burning speed 19.70mm/min. Optimized design with mineral solutions, in the 2007 production based on proportioning scheme of S-5 sinter sinter grade TFe improve 0.33% to ≤ 10mm grain size decreased by 5.13%, 0.75% lower rate of return fines; while the S -1 sintering the sintered ore grade of the ore proportioning scheme the TFe increased by 0.25%, the drum index increased by 0.37% and ≤ 10mm grain size composition of a 2.19% reduction in the rate of return fines reduced by 0.75%. Summing up the results of the assay, significantly the sinter mixture proportioning scheme designed the overall test results. Comprehensive metallurgical performance and production test results, recommended to choose the future production of heavy steel sinter mix with mine program: S-5, S-1.

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CLC: > Industrial Technology > Metallurgical Industry > General issues > Smelting of raw materials and ore pretreatment > Ore pretreatment, sintered pellets > Sintering
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