等离子体加热半钢的增碳和脱硫试验

在１５０ｋＷ等离子体感应炉内，进行了加热半钢升温，增碳和脱硫的实验。研究了等离子枪的类型、功率、枪位以及底吹搅拌等因素对加热效率和熔池分布的影响规律。在等离子枪加热控制熔池温度的条件下，可将半钢中的碳含量从１．９２％增至４．５８％，碳利用率高达６１．５７％，脱硫率达６６．５８％以上。     

攀矿钛渣电炉副产半钢炼铁和炼钢工艺研究

本文从理论探索到小规模工业试验结果证实,含硫0.11～0.8％,碳2.1～2.45％,低硅锰的半钢通过喷射冶金新工艺可得到优质铸铁和电炉强化脱硫工艺炼成优质钢,对于该两种工艺的经济效益分析,认为半钢炼成优质铸铁比较合理。 喷射冶金工艺流程为:半钢温度大于1400℃,在铁水包中先喷吹1.3～2.8％碳粉,增碳至3.5％C以上,然后向已增碳的铁水中喷吹1～2％脱硫剂,脱硫至小于0.05％,最后进行合金化处理可得到优质铸铁。     

攀矿钛渣副产半钢炉外处理成铸铁工艺研究

密闭电炉熔炼攀枝花钛铁矿,可得到钛渣和低碳、高硫铁水(也叫半钢)。国内首次研究成功将钛渣半钢喷砍处理成铸铁工艺。根据工艺特点,本文论述了喷吹工艺的选择,增碳脱硫粉剂,半钢温度和喷枪埋入深度对增碳脱硫的影响。试验结果表明,该工艺是回收利用钛渣半钢的一条有效途径。     

攀钢半钢冶炼热补偿工艺开发及应用

摘要：针对攀钢半钢冶炼热源不足带来的问题,通过分析转炉热补偿技术优缺点,提出在提钒转炉出半钢时加入硅铁对半钢进行化学热补偿的增硅热补偿工艺,解决了增硅后预处理脱硫渣 铁难分离的问题。结果表明,半钢增硅热补偿新工艺减少半钢温降5℃,降低兑铁时碳烧损0.06%,使得半钢碳质量分数平均提高了0.16%,温度平均提高5.3℃,半钢质量更为稳定。新工艺应用后,攀钢中高碳钢转炉终点钢水碳质量分数由原来的0.05%提高到0.12%,终点钢水碳质量分数在0.07%～0.15%的比例由原来的32.2%大幅度提高到92.4%。该工艺在降低转炉冶炼成本的同时,提高了钢水质量,同时减少了烟尘排放量,具有明显的经济效益和环保效益。     

攀钢半钢冶炼热补偿工艺开发及应用

针对攀钢半钢冶炼热源不足带来的问题,通过分析转炉热补偿技术优缺点,提出在提钒转炉出半钢时加入硅铁对半钢进行化学热补偿的增硅热补偿工艺,解决了增硅后预处理脱硫渣-铁难分离的问题。结果表明,半钢增硅热补偿新工艺减少半钢温降5℃,降低兑铁时碳烧损0.06%,使得半钢碳质量分数平均提高了0.16%,温度平均提高5.3℃,半钢质量更为稳定。新工艺应用后,攀钢中高碳钢转炉终点钢水碳质量分数由原来的0.05%提高到0.12%,终点钢水碳质量分数在0.07%～0.15%的比例由原来的32.2%大幅度提高到92.4%。该工艺在降低转炉冶炼成本的同时,提高了钢水质量,同时减少了烟尘排放量,具有明显的经济效益和环保效益。     

半钢增碳试验

针对攀钢半钢炼钢热源不足的问题，在对比分析各种热补偿技术的基础上，开发应用了半钢复合增碳剂ＺＴ６０／ＺＴ６５用于半钢罐内增碳。经使用表明：半钢增碳效果明显、稳定，碳收得率达６５％以上；碳收得率与增碳剂粒度、增碳剂加入量等紧密相关；当增碳剂加入量４５０ｋｇ／罐时，可提高半钢化学热约２２℃，能极大地改善半钢条件，使半钢炼钢多项指标得以提高。     

钛渣副产半钢脱硫增碳试验研究

针对钛渣副产半钢的特点，结合攀枝花地区铁原料市场的需求，研究了钛渣副产半钢的增碳、脱硫和合金化工艺，通过处理可将半钢加工成提钒冷却剂，球墨铸铁和铸造生铁或低碳生铁，具有较好的经济效益。     

纯铁电渣重熔的碳、硫控制

本文深入研究了超低碳超低硫纯铁产品YT01B电渣重熔冶炼工艺,查明了钢锭增碳和影响脱硫效果的主要原因。通过采用三元提纯渣系、改进提纯渣质量、控制提纯渣在冶炼过程中的氧化性变化等措施,解决了钢锭下部增碳和脱硫差的问题,使电渣冶炼纯铁增碳量在0．0011％以下,平均脱硫率达到62％,成品碳、硫含量均〈0．003％。     

高钛渣副产品半钢应用研究

随着全球钛白粉和海绵钛需求量不断增长,高钛渣的需求也呈直线上升趋势.而半钢的有效利用对提高钛渣生产的经济性有着重要的影响.为了提高钛渣生产企业的经济效益,有必要对半钢进行增值研究,提高半钢附加值.通过对传统生产工艺流程进行改进,在渣铁分离后,对液态半钢进行脱硫、增碳、增硅处理.该工艺在铁水量比较少的情况下,采用Mg+C...     

高铬不锈钢的热处理问题

前言 高铬钢通常是指铬含量≥12％～14％并含有碳及其他合金元素的钢。这种钢通常要进行两种类型的热处理：含碳量0．1％～0．2％C的奥氏体钢,用1150℃淬火 高温退火;而马氏体钢则用1050℃淬火 低温回火热处理。     

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.