磨细高钛高炉渣水化特性研究

采用X射线衍射、SEM、EMPA、DTA等手段,用对比分析的方法,研究了攀钢磨细高钛高炉渣矿物组成、水化活性、水化产物以及水化过程特征。研究结果表明,攀钢磨细高钛高炉渣水化活性指数仅为77．4％,而普通高炉渣为108％。从水化产物的类型看,高钛高炉渣、普通矿渣、纯水泥三种物质具有相同的水化产物,高钛高炉渣的水化产物数量结晶度明显低于普通高炉渣,从微观结构上说明了攀钢高炉渣水化活性低的原因。     

含钛高炉渣制备钛渣的工艺研究

高钛型高炉渣中的TiO2含量达20%~23%,是宝贵的二次资源。利用TiO2对盐酸的稳定性,将炉渣中的酸溶性物质酸解后固液分离得到钛渣,并分析原料粒度、酸渣比、反应温度、反应时间对钛渣中TiO2含量的影响,得到较佳的酸解反应条件。通过XRD图谱分析可知,高炉渣中A l,Mg,Fe等元素的化合物物相均已完全酸解,产品钛渣中TiO2含量达48%以上。该工艺为综合利用高钛型高炉渣提供了一种有价值的新途径。     

高钛高炉渣在微波场中的加热行为

为在高钛高炉渣中引发微裂纹、有效降低其研磨难度,进行了微波加热高钛高炉渣的实验.在引发裂纹的过程中发现其不仅能被微波场有效加热,且有热失控现象发生.为探讨微波加热高钛高炉渣的机理以及产生热失控现象的原因,对不同种类的合成炉渣进行了微波加热实验.实验表明渣中CaTiO3对有效加热高钛高炉渣起到重要作用.利用Network Analyzer测量了其介电常数.测量结果表明CaTiO3的介电常数远远大于一般材料,定量说明了在微波场中CaTiO3对加热高钛高炉渣的作用.此外,实验测得CaTiO3的介电常数随温度的升高而增大,这种正反馈加热方式正是高钛高炉渣在微波场中发生热失控的主要原因之一.     

高钛高炉渣碎石用做砼骨料的研究

攀钢高炉渣TiO2含量15%以上，与普通高炉渣的组成结构有较大差异，高钛高炉渣的性质研究及其用于砼的试验说明：高钛高炉渣结构稳定，其碎石用做砼骨料与普通碎石相比，抗压强度及劈拉强度稍高于后者。此外，其运用实例也说明了高钛高炉渣砼的稳定性。开发利用高钛高炉渣对环境保护，延长攀钢渣场使用年限具有重要意义。     

高钛高炉渣综合利用新方向

从高钛高炉渣的特性和矿物相结构出发,回顾了高钛高炉渣综合利用的研究进展,提出高值利用高钛高炉渣的六个原则,指出高温碳化低温选择性氯化、等离子熔融还原提钛、冶金改性选择性析出分离是今后利用高钛高炉渣的方向.     

碳对含钛高炉渣钠化反应热力学及钠化率的影响

为高效回收含钛高炉渣中钛元素,探索含钛高炉渣综合利用的新工艺。通过热力学计算分析了含钛高炉渣钠化可行性,热力学计算结果表明,在高于碳酸钠熔点1 124 K低于1 423 K的温度范围内进行含钛高炉渣的钠化反应是可行的。采用渣碱共熔法对含钛高炉渣进行钠化试验研究,结果表明,碳可以促进含钛高炉渣的钠化,随着配碳量的增加,含钛高炉渣的钠化率增加,在含钛高炉渣粒径d0为0.075 mm、反应温度为1 423 K、反应时间为2 h的条件下,当配碳量为nC∶nNa_2CO_3=2∶1时,含钛高炉渣的钠化率达到78%并维持稳定状态。     

高钛型高炉渣混凝土碳化深度试验研究

混凝土碳化造成钢筋锈蚀是混凝土结构耐久性失效的主要原因。为研究攀枝花高钛型高炉渣混凝土抗碳化性能,对不同强度高钛型高炉渣混凝土进行不同碳化时间的室内加速碳化试验,结果表明：高钛型高炉渣混凝土强度越低,越容易被二氧化碳侵蚀;碳化时间越长,碳化现象越明显。基于Fick第一定律,根据高钛型高炉渣混凝土强度、碳化时间,建立了高钛型高炉渣混凝土碳化深度预测模型。经与试验结果对比,吻合度高,验证了预测模型准确度。     

高炉渣微粉

<正>1序高炉渣微粉是通过对高炉水渣进行粉碎得到的,利用高炉水渣具有水硬性的特性,可将其用于高炉渣水泥、混凝土的混合料、地表改良材料等诸多方面。JFE矿业、千叶分部及水岛地区的3个厂就是利用JFE钢铁公司的高炉水渣为原料进行高炉渣微粉的生产。2高炉渣微粉的质量高炉渣微粉的绝大部分是用作生产高炉渣水泥的原料,也有一部分用于混凝土的混合料。高炉渣微粉按照JISA6 206(混凝土用高炉渣微粉)标准     

含钛高炉渣性能的研究进展

高炉渣是保证高炉冶炼顺利进行的决定性因素之一.国内外大量学者对含钛高炉渣的物理化学特性进行了研究.对高钛型(TiO2的质量分数＞20%)、中钛型(TiO2的质量分数为5%～20%)、低钛型(TiO2的质量分数＜5%)炉渣的物化特性的异同点进行了归纳和对比,介绍了含钛高炉渣在高炉生产实际中的应用概况,并指出了今后的研究方...     

用盐酸浸出含钛高炉渣富集钛的试验研究

攀西地区钒钛磁铁矿经高炉冶炼后产生大量高钛炉渣,其中TiO2质量分数达18%~27%。研究了常压下用盐酸浸出含钛高炉渣,考察了盐酸浓度、反应温度、酸渣体积质量比及反应时间对含钛高炉渣中各组分浸出率的影响。结果表明:在反应温度90℃、浸出时间5h、盐酸浓度6mol/L、酸渣体积质量比1.1∶1条件下,Mg、Al、Fe浸出率均达65%以上,Ti浸出率低于6%,滤渣中TiO2质量分数超过40%,钛得到有效富集。     

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.