镁基铁水炉外脱硫工艺的试验研究

叙述了镁基铁水炉外脱硫工艺技术研究的简要过程,分析了镁脱硫的原理及影响镁脱硫的因素。试验结果表明：镁基炉外脱硫工艺可行,该工艺具有设备简单、投资低、脱硫效率高、渣量少、铁损低和成本适中等优点。该试验研究的成功打破了国外认为用镁基脱硫剂进行脱硫,只能在100t以上,喷吹深度大于2m铁水包内进行的论断。     

镁基脱硫剂铁水预脱硫工业优化研究与应用

通过对攀枝花新钢钒公司铁液预处理站镁基脱硫剂脱硫工艺优化的工业试验和生产实践，探索出适合生产要求的喷吹压力、喷吹速度、钙镁比等工艺参数。试验结果表明，喷吹工艺优化后满足了现行生产工艺的要求，保证了脱硫效果，提高了脱硫剂的利用率，降低了吨钢生产成本。     

提高镁粒利用率的生产实践

在系统分析影响铁水脱硫镁粒利用率的基础上,优化脱硫喷吹参数,通过提高扒渣洁净度、优化喷吹工艺参数、改造喷枪汽化室等措施,提高镁粒利用率,降低镁粒消耗。     

铁水包喷吹Mg+CaO粉剂脱硫技术

分析了宝山钢铁股份有限公司采用TDS(Torpedo Car Desulphurization)、PTC(Hot Metal Pre-treatment Center)和铁水包单枪、双枪喷Mg+CaO脱硫模式的生产情况.结果表明,采用铁水包喷吹Mg+CaO脱硫在喷吹时间、脱硫效果、粉剂消耗、生产组织及经济效益等方面明显优于混铁车喷吹脱硫.脱硫时间可缩短50%以上,终点硫质量分数可达到0.001%～0.003%,粉剂总耗量仅为CaC2基粉剂耗量的50%、CaO基粉剂耗量的20%,综合成本比TDS或PTC混铁车脱硫低18%～30%.铁水罐双枪喷Mg+CaO脱硫模式的效果最好.     

提高镁粒铁水脱硫利用率的技术手段

介绍了莱钢喷镁脱硫的工艺流程、生产现状及镁粒脱硫机理。系统分析了制约镁粒利用率提高的影响因素。采取优化扒渣器结构以提高扒渣洁净度、改造喷枪气化室等措施,并通过正交试验确定喷枪插入深度、喷吹速度、喷吹压力等重要工艺参数组合,实现了镁粒利用率的大幅度提高,为转炉的快节奏生产及产品质量的提高创造了条件。     

铁水罐喷吹颗粒镁高效化脱硫的研究

结合湘钢铁水罐喷吹颗粒镁脱硫的理论研究与生产实践,对喷吹颗粒镁脱硫工艺作了简要介绍;分析了脱硫量与耗镁量之间的关系、影响脱硫率的因素和颗粒镁脱硫成本;对铁水罐喷吹颗粒镁脱硫提出了一些建议。     

钝化石灰在复合喷吹铁水脱硫工艺中的应用

对钝化石灰在复合喷吹铁水脱硫工艺中的脱硫机理及各阶段中的作用进行了分析,结合山西太钢不锈钢股份有限公司80 t复合喷吹铁水脱硫生产实践,得出复合喷吹脱硫工艺中的钝化石灰可以提高镁粉利用率和脱硫率,加强深脱硫能力,减少温降、回硫量和扒渣铁损,降低脱硫成本。以铁水初始硫质量分数0.02%~0.03%,终点硫质量分数小于0.003%为例,复合喷吹脱硫剂消耗比单喷颗粒镁降低了2.96元/t,扒渣铁损降低了1.08元/t,扒渣剂消耗减少了0.23元/t,合计降低了脱硫成本4.02元/t。     

LF炉的白渣精炼

镁基深脱硫技术以高效低耗的脱硫效果得到推广和应用。采用流化石灰粉＋钝化镁粉的复合喷吹具有粉剂用量少、喷吹时间短、温降少、铁损少、可实现深脱硫和综合成本低等优点。     

湘钢二炼钢铁水镁脱硫应用实绩

介绍了湘钢二炼钢铁水罐喷吹颗粒镁脱硫工艺,对镁脱硫效果及关键指标进行了对比分析。同时,针对铁水温度、初始硫的质量分数及喷吹工艺参数对镁脱硫效果的影响进行了分析,对铁损、喷吹温降和脱硫成本进行了测算。结果表明,主要技术经济指标达到国内先进水平。提出了进一步提高镁利用率的改进措施。     

单吹颗粒镁铁水脱硫工艺研究与应用

阐述了单吹颗粒镁脱硫的工艺设备特点、基本原理及应用效果。该工艺具有布置简单、成本低、工艺过程自动控制、喷吹精度高等优点。凌钢铁水罐采用单吹颗粒镁脱硫工艺后获得显著效果，最佳终点w（S）达到0．002％，铁液温降为0．92℃／min，镁耗为0．63kg／t，脱硫效率达82%。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.