复吹转炉顶吹枪位与非均衡底吹搅拌的水模拟

为优化120 t复吹转炉冶炼效果,通过水模型试验,模拟研究了复吹转炉底吹强度、顶枪枪位、底吹排布方式和流量分配比对渣 钢间传质效果和熔池混匀时间的影响。研究表明,在相同底吹条件下,顶枪低枪位操作时渣 钢间传质系数比高枪位操作时渣 钢间传质系数大,且随着底吹流量分配比增大,渣 钢间传质系数先增大后减小。在相同顶枪枪位操作条件下,底吹元件间隔排布时,渣 钢界面传质效果总体优于连续排布。随着底吹流量分配比增大,高枪位和低枪位混匀效果变化趋势近似相反。在高枪位下,底吹元件连续排布混匀时间总体少于底吹元件间隔排布时对应的混匀时间;在顶枪低枪位操作条件下,底吹元件连续排布混匀时间总体大于间隔排布混匀时间。通过顶枪枪位、底吹排布和流量分配比的合理匹配,较传统均衡流量底吹模式,传质系数可提高30%～125%,混匀时间可减少8.6%～51.5%。     

150t提钒转炉熔池流场优化研究

通过1:6的水力学模型,对顶枪枪位、顶枪气体流量、底吹气体流量、底部供气元件的布置等影响提钒转炉混匀时间的因素进行研究和优化.确定最佳喷吹方案为:枪位183.3mm,顶吹气体流量85.6 m3/ h,底吹气体流量1.05 m3/h;最佳底枪布置方案为:8支底枪分两组布置在转炉底部直径0.4D和0.6D的两个环上,相邻4...     

顶吹转炉溅渣护炉工艺冷态模型实验研究

采用水力模型的研究方法,对顶吹转炉溅渣护炉工艺进行冷态模型试验。通过测定溅到转炉炉衬上的渣量,分别对顶枪枪位、气体流量、渣量等工艺参数的影响进行比较,从而确定最佳操作工艺参数。     

氧气顶吹转炉溅渣护实验研究

采用水力模型研究方法,针对马钢二钢厂20t转炉进行溅渣护炉冷态模拟试验,得出最佳工艺参数为枪位为1680mm,N2流量为11000m3/h左右,渣粘度适中.此外,得出夹角为13°的喷头溅渣效果好.     

氧气顶吹转炉溅渣护炉试验研究

采用水力模型研究方法 ,针对马钢 2 0t转炉进行溅渣护炉冷态模拟试验 ,得出最佳工艺参数为 :枪位 1680mm ,氮气流量为 110 0 0m3/h ,大流渣量 ,渣粘度适中。此外 ,在满足炼钢生产的条件下 ,采用夹角为 13°的喷头溅渣效果好     

复吹转炉射流与钢水熔池相互作用的水模型试验

根据鞍钢180 t复吹转炉的实际生产情况,设计了超音速射流氧枪并进行水模型实验,避免了亚音速射流氧枪所带来的氧枪枪位修正问题.通过10:1水模型.保证最佳的底吹工艺参数不变(4孔对称,底吹流量0.70m3/h),改变顶吹氧枪的气体流量(38-42 m3/h)和吹炼枪位(130-210 mm)进行实验.结果表明:水模型最佳的工艺参数是枪位150 mm,流量39 m3/h.     

重钢85t复吹转炉的水模型试验

通过重钢85 t复吹转炉1∶8的水模型,试验研究了顶枪枪位、底吹流量对转炉熔池混匀时间、炉口喷溅量、冲击深度和液面扰动的影响。实验表明,模型获得最大搅拌能的顶枪枪位为50~100 mm;枪位在90~110 mm时,由射流冲击引起的物理喷溅量达到最大值。建立了重钢85 t转炉复吹工艺参数:冶炼前期顶枪枪位为1600~1760 mm,底吹流量240~350 m³/h;中期两参数分别为1100~1300 mm和160~200 m³/h,后期两参数分别为1040~1120 mm和200~350 m³/h。     

LBE转炉优化吹炼工艺参数的水模实验研究

根据相似原理 ,采用水模实验方法 ,以优化LBE转炉吹炼工艺为目的 ,研究了影响熔池搅拌的各工艺参数 ,主要包括顶枪枪位、底吹位置布置方案、底吹气体流量、顶吹气体流量与混匀时间的关系     

转炉冶炼中磷铁水动力学条件的优化

上海梅山钢铁股份有限公司炼钢厂对影响转炉动力学条件的氧枪喷头参数和影响底吹寿命的溅渣工艺、底吹流量参数进行了优化,实现了顶底复吹同步,促进了熔池内的化学反应速度的提高,转炉终点碳氧积稳定控制在0.003 0以下,转炉的各项指标也有较好的提升。     

80t转炉复吹工艺水模试验研究

针对钢厂转炉吹炼过程中频繁发生喷溅粘枪及脱磷效果不佳的现象,在实验室利用水模对80 t转炉复吹工艺进行了研究。水模试验参数包括氧枪枪头喷孔夹角、枪位、底吹布置和流量等。根据研究结果提出了几种复吹工艺优化方案:氧枪喷孔倾角从现有的12°增大至13°;将底吹透气砖数减为4个,分布半径不变;保持底吹流量在200 m3/h以上;枪位应控制在合理的范围内,不可偏高或偏低。     

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.