%0 Journal Article
%T 云南褐煤半焦用于硅铁生产的试验研究     -
%A 赵家云
%J 洁净煤技术
%D 2013
%X 基于云南褐煤半焦的独特性能,试验采用褐煤半焦替代50%的"金焦"炼硅铁。研究了褐煤半焦粒度、活性、灰分等指标对生产硅铁的影响。结果表明:入炉褐煤半焦水分应控制在10%左右;半焦中-4 mm组分不应超过10%,4～6 mm质量分数应达到50%左右;半焦化学活性高对"炼硅铁有利,但同时提高了还原剂灰分中Al2O3的还原率,对生产75%硅铁不利,因此褐煤半焦用作"炼硅铁的灰分应不超过7%。通过混合焦和"金焦的应用试验,说明采用混合焦的产品中Al平均质量分数为2.27%,棕(Al)<2%的产品率为28.56%,比同期全部用"金焦下降7.39%;采用混合焦的电耗下降37 kWh/t,还原剂耗量增加了3.2%,低Al产品率稍有下降;褐煤半焦部分替代"金焦生产硅铁是可行的,且具有一定的节电降耗作用。 In view of excellent properties of Yunnan lignite semi-coke,which is used to replace 50 percent metallurgical coke to produce ferrosilicon.Investigate the impact of lignite semi-coke particle size,reactivity,ash and other indicators.The results show that,the moisture of feeding lignite semi-coke should be controlled around 10 percent,the particle size less than 4 mm component of semi-coke should not exceed 10 percent,the mass fraction of component ranging from 4 mm to 6 mm should reach about 50 percent.The high reactivity property of semi-coke is favorable to the smelting ferrosilicon,while improving the reduction ratio of Al2O3 in ash content which is negative to the 75 percent ferrosilicon production,so the ash content in semi-coke should not be over 7 percent.Application tests on mixed semi-coke and metallurgical coke show that,the mass fraction of Al in the product made by mixed coke is 2郾 27 percent on an average.Product rate of ferrosilicon,whose Al content is less than 2 percent is 28郾 56 percent,down 7郾 39 percent compared with wholly using metallurgical coke.Using mixed coke,electricity consumption decrease 37 kWh/ t,reductant consumption increase 3郾 2 percent,while lower Al content product drop slightly.All of these indicate partial substitution of lignite semi-coke for metallurgical coke in ferrosilicon production is feasible,and has a certain role in saving energy
%K 褐煤半焦
%K 冶金焦
%K 混合焦
%K 硅铁
%K 铝
%K 化学活性 lignite semi-coke
%K metallurgical coke
%K mixed coke
%K ferrosilicon
%K Al
%K chemical reactivity
%U http://www.jjmjs.com.cn/WKD/WebPublication/paperDigest.aspx?paperID=e5b308e0-777a-4e1e-a4ea-9fbe97a6a821