MnO基无氟复合造渣剂在沙钢转炉冶炼中应用的试验研究

MnO基无氟复合造渣剂是转炉高效化与生产过程无氟清洁化的不可缺少的新型炉料之一。其不仅无氟,并且冶金特性良好：一般能提前化渣1～1．5min;全程化渣好,基本上不喷溅,不返干,不粘枪,有利安全生产,降低钢铁料消耗5～10kg／t;冶炼周期缩短,每天可多炼一炉钢;在使用量8-14kg／t情况下,终点余锰增加0．04％～0．08％,降低FeMn消耗1-2kg／t。     

MnO基无氟复合造渣剂在转炉冶炼中的试验研究

MnO基无氟复合造渣剂是转炉高效化与生产过程无氟清洁化不可缺少的新型炉料之一。其不仅无氟，并且冶金特性良好。本文对MnO基无氟复合造渣剂在转炉冶炼中的应用作了试验研究，并对试验结果和作用机理作了探讨。     

转炉干法除尘灰基复合造渣剂的研发及应用

利用转炉干法除尘灰开发出一种适用于转炉冶炼过程造渣的新型复合造渣剂,该新型复合造渣剂能够满足干法除尘稳定运行以及各项转炉冶金性能的要求。采用新型复合造渣剂后转炉氧气消耗降低了2.65 m3/t,转炉终点脱磷率提高3.31%,钢铁料消耗降低0.69 kg/t,吨钢煤气回收平均提高了5m3,吨钢辅料成本降低2.68元。     

转炉无氟复合造渣剂的使用实践

转炉冶炼的高效化与生产过程的清洁化已成为现代炼钢技术发展的核心任务,中厚板卷厂通过比较几种化渣剂的化渣机理,研究无氟复合造渣剂的使用方法。实现了转炉生产全程化渣、降低了钢铁料消耗、消除了氟离子污染,取得了明显的经济效益。     

150t顶底复吹转炉少渣冶炼工艺实践

石横特钢150 t转炉炼钢应用生白云石代替部分石灰和镁球进行少渣冶炼的工艺,采用优化的"溅渣+调渣"工艺改善了留渣的安全性;通过采用合理的造渣制度、吹炼制度、加入适量炉渣发泡剂、控制倒渣点,使得脱磷率约60%,排渣率约50%,有效保证了转炉的冶炼终点,各项指标得到了优化,石灰消耗从46.7 kg/t降低到30.2 kg/t;轻烧镁球消耗从13.3 kg/t降低到8.7 kg/t;氧气消耗为47.7 m~3/t;钢铁料消耗从1 075.3 kg/t降低到1 072.1 kg/t,实现安全、低成本少渣冶炼。     

攀钢半钢冶炼转炉脱磷工艺技术研究

针对攀钢半钢冶炼时辅料消耗大、终渣氧化性高且脱磷效果不佳的问题,通过对转炉脱磷理论以及冶炼过程脱磷规律的研究,确定了前期脱磷率偏低、中期返干是影响脱磷率的主要因素。通过对终渣岩相的进一步分析,确定了磷在渣中的主要富集相,解释了后期依靠提高炉渣氧化性和增加辅料消耗不能显著提高脱磷率的原因。通过采用"留渣加料"、含铝复合造渣剂造渣以及降低冶炼后期枪位等技术措施,转炉成渣时间由4. 3 min缩短到3. 2 min,返干比例由由56%显著降低到18%,在总渣料消耗平均减少5. 69 kg/t的情况下转炉冶炼全程脱磷率由79. 4%提高到84. 1%,终渣TFe质量分数平均降低2. 49%。通过对脱磷工艺参数的优化,在提高转炉脱磷效率的同时,降低了转炉冶炼成本。     

石灰石造渣在转炉冶炼中的研究与应用实践

以石灰石分解反应为基础,理论分析了石灰石在转炉内的化学变化与冷却效果,说明了石灰石造渣在转炉冶炼中的可行性,以此分析为依据进行了石灰石代替部分石灰造渣冶炼工业试验。试验结果表明:当石灰石消耗为14. 8 kg/t时,石灰消耗由37. 5 kg/t降低至28. 4 kg/t,氧化铁皮球消耗由22. 5 kg/t降低至10. 5 kg/t;未使用石灰石与使用石灰石后的终渣碱度平均值分别为3. 15、3. 08,终渣TFe含量平均值分别为18. 5%、17. 4%,对终渣碱度基本无影响;使用石灰石的终点P比未使用石灰石的平均略低0. 02%,终点温度与C含量波动很小,取得了较好的效果,吨钢成本降低约5. 82元/t。     

转炉低成本造渣技术研究与实践

为降低炼钢工序成本,实现转炉渣料成本最优,进行了转炉低成本造渣技术的研究与试验。以"留渣+双渣"为基础冶炼模式,确定了石灰石、铁矿石在转炉少渣冶炼中的使用方案,使石灰消耗由42.4 kg/t降低至26.5kg/t,铁矿石用量由0 kg/t增加至23.5 kg/t,转炉渣料成本降低4.8元/吨钢,金属料成本降低7.05元/吨钢。     

300t复吹转炉半钢冶炼无氟化造渣研究与应用

通过工业试验,对首钢京唐钢铁联合有限责任公司300t脱碳复吹转炉半钢冶炼过程有氟和无氟化造渣工艺分析,从理论上说明了无氟化化渣所需条件。对比2种造渣工艺的工业试验效果表明:脱碳转炉半钢冶炼采用留渣操作、高枪位、添加助熔剂及降低熔池升温速度相结合的造渣工艺可以得到较好的化渣效果;无氟化工艺已实现单月平均降低成本90.4万元,全年预计降本增效1 085万元。     

含B2O3的Al2O3—Fe2O3基无氟复合造渣剂的试验研究

在杭钢炼钢厂40t转炉上进行了含B2O3的Al2O3-Fe2O3基无氟复合造渣剂的工业性试验。试验结果表明其冶金特性良好;能提前0.5~1.0min化渣;全程化渣好,基本上不喷溅,不"返干"、不"粘枪";钢铁料、石灰等消耗有所降低。本文还探讨了Al2O3与B2O3化渣机理的有关问题。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.