提高高效浓密机浓缩效果的有效途径

针对乌拉嘎黄金矿业公司酸性氧化渣难沉降的特点及高效浓密机本身存在的不足,进行了絮凝剂的选择试验,及对浓密机结构的改进。通过慎重选择絮凝剂、合理确定絮凝剂添加点以及对浓密机脱气槽、中心进料筒等关键部位结构的改进,使浓密机浓缩效果有了明显提高,底流浓度由原来的10%~15%提高到25%左右。     

高效浓密机现状及其在我国的应用前景

本文对国内外普遍使用的高效浓密机的结构特点、工艺特点进行了描述，指出了以往高效浓密机设计的重点在于强化絮凝剂与颗粒的作用，提高絮凝剂的作用效果。理论分析和实践的结果表明，通过改进浓密机的结构，改善浓密机内两相流运动状况同样可以大幅度地提高浓密机的效率，从而实现浓密机的高效化。深锥式浓密机增加了浓密机的压缩高度，改善了絮团中水的排出；改进了浓密机的底流排放方式，极大地提高了浓密机的底流浓度。作者对以上几种类型浓密机在我国的应用前景进行了预测。     

高效浓密机

对普通浓密机与高效浓密机的浓缩效果进行比较。分析浓缩过程固体颗粒的行为，提出提高浓密机效率的方法。     

FLSmidth深锥浓密机在膏体充填中的应用

FLSmidth深锥浓密机对超细尾砂具有良好的脱水浓缩效果,底流浓度可达72％～76％.介绍FLSmidth深锥浓密机的结构、工作原理及在全尾砂膏体充填中的安装和试运行,效果显著,提高充填作业的效率,促进矿山发展,为武山铜矿三期扩建工程的前置性的关键工作提供强有力的技术支撑.     

浓密机事故分析及保护装置的设计

贵溪冶炼厂选矿车间一台浓密机投入使用不久发生了传动蜗轮箱崩裂、主轴扭曲的事故,浓密机是选厂用于脱水的主要设备,一旦出了故障,停产处理时间长,费用高。经分析造成此次故障的主要原因是浓密机设计机械强度不足,无过载保护装置。为了避免类似事故的再次发生,设计安装了一套可靠的浓密机保护装置,并通过降低传动电机功率,提高铸件的制造质量防止浓密机过负荷时出现零件破坏。重新投入后浓密机耙子能根据负荷情况自动升降,使用近8个月浓密机运转正常。     

提高浓密机效率的最佳途径

对浓密机的结构及使用情况进行了分析,提出了最经济、最快速、最有效的提高浓密机产能的改进方法,并对改进前后的使用情况进行了对比,证实了这些措施的可靠性和实用性。     

Φ30m浓密机压力自动控制系统的优化改造

浓密机生产过程工艺机理复杂,由于初期设计的局限和给矿性质波动频繁,难以实现浓密机自动控制。浓密机压力自动控制系统的优化改造,提高了浓密机自动控制的可靠性,运行状态更加贴切实际,避免了易损件的使用,减少了工作量,降低了成本,使用中达到了预期的效果。文中对压力自动控制系统的改造进行了阐述。     

厂区内控制爆破的实践

一、概况金堆城钼业公司三十亩耕地选矿厂为了提高产品质量,增加经济效益,1983年决定增设φ30米浓密机措施。由于场地所限,该浓密机位置选择在离高压线路、通讯电缆、尾矿管道、公路及房屋很近的地方,且有一长、宽、高为10×5×2.5米弧石正置于浓密机基础处,阻碍工程施工,影响施工进度。为加快施工,要求爆破处理该弧石。     

深锥浓密机底流质量分数与停留时间关系研究

料浆停留时间是保证深锥浓密机底流质量分数的必要条件,为了探讨底流质量分数与停留时间的关系,推导了深锥浓密机底流质量分数与停留时间之间的数学模型.将深锥浓密机外形结构及尾砂物理特性参数代入数学模型,即可得到该浓密机达到所需底流质量分数的停留时间.采用某矿山深锥浓密机对数学模型进行工程应用举例,在底流质量分数为55.82％...     

深锥高效沉降槽在铝土矿浮选尾矿脱水工艺中的研究及应用

针对铝土矿浮选尾矿浓密机存在底流浓度低、溢流浮游物偏高问题，自行开发研制了深锥高效沉降槽，以代替普通浓密机，文章介绍了深锥沉降槽的工作原理和结构特点，工业应用及实际效果表明，深锥沉降槽较好地满足了工艺要求，保证了尾矿坝的安全堆存，提高了回水利用率，减少了操作和维护工作量。     

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.