纳米技术在矿物加工中的应用

介绍了纳米技术的相关概念以及它的发展历程,重点阐述了纳米粒子、纳米气泡、纳米材料的特殊性能,正是这些特性使其在吸附、催化、强度和硬度方面表现出优于常规材料的功能.综述了纳米粒子浮选、纳米气泡浮选、纳米过滤以及纳米材料在选矿设备配件4个方面的应用.纳米粒子和纳米气泡的特殊尺寸保证了它们可以更好地与微细粒矿物接触,提高微细粒矿物的回收率,纳米材料可以延长设备的更换周期.通过对纳米技术在矿物加工模拟实验和实验室试验的研究分析,展望了纳米技术在矿物加工实际生产中的应用前景.     

微细粒矿物浮选研究进展

矿石中的难选微细粒矿物浮选一直是制约提高有用矿物回收率和减少资源浪费的关键因素。随着我国矿产资源的储量逐渐减少,富矿、易选矿物逐渐开采殆尽,难选矿物、微细粒矿物将会成为今后矿产资源回收的主要方向。主要从常规浮选工艺、纳米气泡浮选工艺以及浮选药剂等方面的研究介绍了微细粒回收的浮选现状。     

微细粒矿物分选技术研究进展

对微细粒矿物进行提取,必然会成为我国在未来开展资源提取的主要内容。如何更高效地对微细粒矿物进行回收,是我国在矿产资源利用过程中必须要面对的问题。基于此,本文对多种浮选分离技术,包括剪切絮凝、选择性絮凝、微泡、纳米气泡四种浮选分离技术,以及磁分离分选技术进行简要探讨。     

基于新型离心选矿机的联合流程回收钨细泥试验研究

江西某选厂所属难选钨细泥,矿物组成复杂、矿物粒度微细,采用传统单一选矿工艺及设备难以高效分选回收。为实现其资源化利用,针对该钨资源特性,通过改进重选设备、优化选别工艺,经"预先浮选脱硫-离心选矿机预富集-浮选回收钨矿物"工艺,在原钨细泥含WO_30.31%的情况下,获得了含WO_342.17%、WO_3回收率76.36%的钨精矿产品,较好地实现了钨资源与脉石矿物的分离与回收。通过改变离心转筒锥角、设置精矿富集槽、装备电磁换向阀及气动夹管阀等针对性设计的立式连续型离心选矿机既提高了离心机生产效率,亦在高效回收微细粒钨矿物的基础上,脱除大量脉石及矿泥,大幅降低微细粒矿泥对钨矿物浮选指标的影响,提高钨浮选作业生产效率。     

西藏某铜钼矿选矿废水净化处理与回用研究

西藏某铜钼矿,由于矿石中存在大量易泥化的脉石矿物,在碎磨过程中产生大量的次生矿泥,导致选矿废水存在难以沉淀的微细粒级矿物颗粒,且残存大量的浮选药剂,导致在铜钼混合浮选阶段混合精选效率较低、现场不易操作等不利影响。通过使用絮凝剂来沉淀微细粒级矿物颗粒,利用高原特有的强烈的紫外线暴晒条件降低COD,经过处理后的废水回用于铜钼混合浮选试验,闭路试验结果表明经处理后的废水净化效果较好,回用对浮选指标的影响较小。     

白钨矿选矿工艺研究现状及发展趋势

简述了白钨矿资源开发与利用现状,从白钨矿选矿方法、药剂和设备三个方面,介绍了白钨矿选矿工艺研究现状和发展趋势。重点探讨了联合工艺流程、组合药剂及新型浮选设备,在白钨矿选别中的应用价值。采用合理的联合工艺流程,不仅能提高白钨精矿的品位和回收率,还可以高效回收白钨矿中共伴生的各类有价金属,提高经济效益。新型组合药剂,对目的矿物的选择性和捕收性都大大增强,是未来浮选药剂开发的一个重要方向。新型细粒浮选设备的出现,尤其是针对白钨矿这种脆性矿物,极大地提高了微细粒白钨矿的回收率,避免了资源浪费。     

细粒浮选设备结构设计原则的研究

分析了细粒矿物难浮的原因,在综合考虑浮选矿浆流体动力学因素和分析矿粒与矿粒之间、矿粒与气泡之间相互作用的基础上,提出了细粒浮选设备结构设计的原则。     

锡石浮选研究综述

我国锡矿资源丰富, 但随着资源的开发, 锡矿呈贫、细、杂等特点, 导致锡石选矿的富集与回收难度较大。为了促进微细粒锡石选矿技术的进步, 系统地总结了锡石浮选工艺和药剂。浮选工艺方面介绍了常规浮选、絮凝浮选、载体浮选、溶气浮选以及电解浮选, 浮选药剂概括了捕收剂、活化剂以及抑制剂。指出了新工艺、新药剂对于未来微细粒锡石浮选的重要性。      

钛铁矿浮选研究概述

我国钛资源丰富,但多为可选性差的钛铁矿,为加强对低品位细粒钛铁矿的选别研究,系统的总结了钛铁矿选别工艺和浮选药剂的研究进展。选别工艺方面主要介绍了针对难选的细粒钛铁矿出现的絮凝浮选、载体浮选、乳化浮选等新工艺。浮选药剂方面概述了脂肪酸类捕收剂、羟肟酸类捕收剂、膦酸类捕收剂和苄基胂酸类捕收剂,利用协同效应研究的新型捕收剂、钛铁矿的活化剂和矿物脉石抑制剂及其作用机理。为钛铁矿的浮选提供理论基础,为选矿工作者提供技术参考。     

浮选粒度及浓度对铅锌硫化矿浮选分离的影响

浮选粒度及浓度是影响铅锌选矿指标的重要工艺参数。为进一步提高锡铁山矿铅锌浮选指标,节省选矿生产成本,重点考察了浮选粒度及浓度对铅锌选矿效果的影响。浮选试验结果表明,适合该矿石浮选的最佳浮选粒度为-0.074 mm占55%;选铅浮选浓度为48%,选铅尾矿无需浓缩后选锌浮选浓度为47%。在该条件下,利用现场生产流程及药剂制度处理该矿石,闭路试验可以获得含铅74.82%、含锌2.97%、铅回收率93.41%的铅精矿,含锌46.08%、锌回收率94.03%的锌精矿,含硫40.75%、硫回收率71.06%的硫精矿;相比现场浮选粒度及浓度条件下闭路试验指标,铅、锌、硫回收率分别提高了2.36,2.54,2.98个百分点。适宜的浮选粒度有益于目的矿物颗粒与气泡碰撞、附着,并保证了气泡对矿物具备足够的负载能力,促进了目的金属矿物的高效上浮;高浓度浮选工艺增加了矿浆中药剂浓度,强化了药剂与矿物的作用能力,并有效强化了气泡对有用疏水颗粒的拱抬效应,提高了铅锌硫矿物的分选指标。     

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.