Technology of Blast-Furnace Smelting of Iron using Pulverized Coal at the NLMK

Metallurgist - The problems of using pulverized coal to save coke during iron smelting in the NLMK blast furnaces are considered. The iron smelting technology was implemented in two stages: (i)...     

Scientific-Technical Conference of Specialists in Blast-Furnace Smelting

A scientific-technical conference of specialists in blast-furnace smelting was held in Moscow on December 4–7, 2000 under the auspices of the Association of Blast-Furnace Operators, the Institute Chermetinformatsiya, and the International Union of Metallurgists. Specialists from more than 40 metallurgical companies, scientific-research institutes, and planning organizations in Russia, the Ukraine, and Kazakhstan met with representatives of companies from Slovakia and Germany to discuss the state of blast-furnace smelting and exchange ideas on how to promote its development. The convening of the conference was particularly symbolic for the year 2000, since the beginning of the third millenium should be marked by progress in every sphere of human activity. Veteran blast-furnace operators A. F. Borisov and B. N. Zherebin were among those in attendance.     

Optimum Slag Composition for the Blast-Furnace Smelting of Titaniferous Ores

Abstract

This work is the second part of an investigation aimed at gaining a wider knowledge of the problems met when smelting titaniferous iron ores in the blast furnace. Viscosity measurements of the lower melting slags in the lime-silica-titania-alumina system were studied in neutral atmos. and under reducing conditions. Slag thickening was found to take place in the presence of C. The thickening rate varied with the comp, basically and temp. of the slag. The optimum slag comp. was considered to be that of a slag whose viscosity did not exceed 5 poises after heating in the presence of C at 1500°C for at least 2 hrs.     

熔融还原法冶炼高速钢

对用白钨矿、氧化钼和钒渣冶炼高速钢进行了热力学和动力学的计算与分析。在熔融还原过程中，CaWO4、MoO3、V2O5将被C、CaC2、Si-Fe、SiC还原。反应过程包括：固一固反应、液一固反应、铁浴反应和液一液反应。开发了低温快速还原、控制渣量、抑制沸腾等技术。还原WO3的限制性环节是WO3在熔渣中的扩散，改善渣的流动性，扩大反应界面能加快WO3的还原；使用阻尼剂能有效抑制钼的挥发。用20t的AC电弧炉还原氧化钨矿工业化生产高速钢M-2已取得成功，具有质量高、缩短工序、节约资源、降低能耗、提高成品率和改善环境等优点。综合上述功效，生产每吨M-2钢可节约成本1780元。应用这一新技术，重庆特钢公司累计生产M-2钢7981t。     

熔融还原冶炼高速钢

对用白钨矿、氧化钼和钒渣冶炼高速钢进行热力学和动力学的计算与分析。在熔融还原过程中,CaWO_4、MoO_3、V_2O_5、将被C、CaC_2、Si-Fe、SiC所还原。反应过程包括:固-固反应、液-固反应、铁浴反应和液-液反应。开发了低温快速还原、控制渣量、抑制沸腾等技术。(WO_3)还原限制性环节是WO_3在熔渣中的扩散,改善渣流动性,扩大反应界面能加快WO_3的还原,用阻尼剂能有效抑制钼的挥发。 在20tAC电弧炉用氧化钨矿工业化生产高速钢M-2成功,质量优异,具有缩短工序、节约资源、降低能耗,提高成品率和改善环境等优点。综合上述功效,每吨M-2钢节约成本1780元。应用这一新技术,重庆特钢公司累计生产M—2钢7981t。     

Experience in Coke Preparation for Blast-Furnace Smelting. Part 1

Metallurgist - We have reviewed the literature on coke preparation for blast furnace smelting, including studies on particle size distribution. We describe the basic requirements on coke quality in...     

Experience in Coke Preparation for Blast-Furnace Smelting. Part 2

Metallurgist - We have reviewed the literature on coke preparation for blast furnace smelting, including studies on particle size distribution. We describe the basic requirements for coke quality...     

熔融还原法冶炼高速钢

对用白钨矿、氧化钼和钒渣冶炼高速钢进行了热力学和动力学的计算与分析。在熔融还原过程中,CaWO3、MoO3、V2O5将被C、CaC2、Si—Fe、SiC还原。反应过程包括:固—固反应、液—固反应、铁浴反应和液—液反应。开发了低温快速还原、控制渣量、抑制沸腾等技术。还原WO3的限制性环节是WO3在熔渣中的扩散,改善渣的流动性,扩大反应界面能加快WO3的还原;使用阻尼剂能有效抑制钼的挥发。用20t的AC电弧炉还原氧化钨矿工业化生产高速钢M-2已取得成功,具有质量高、缩短工序、节约资源、降低能耗、提高成品率和改善环境等优点。综合上述功效,生产每吨M-2钢可节约成本6071元。应用这一新技术,重庆特钢公司累计生产M-2钢7981t。