贵州某锰尾矿综合回收利用试验研究

贵州某锰尾矿中含有品位为9.07%锰和9.74%硫,为了矿产资源能够得到充分利用,本试验通过浮选、磁选对比回收该锰尾矿中的锰和硫,最终确定采用先浮选回收硫,后磁选回收锰的工艺流程,并取得了硫精矿品位42.19%,回收率为85.72%以及锰精矿品位34.01%,回收率61.95%的选矿指标,为该类锰尾矿的资源综合利用提供了技术参考。     

某难选锰矿选矿工艺试验研究

本文针对陕西某低品位难选碳酸锰矿开展选矿工艺试验研究,并分别进行了两种不同品位矿样的选矿试验。结果表明,对于品位8.87%的低品位贫矿,采用磁选可获得锰品位14.35%,回收率89.59%的锰精矿;对于锰品位10.68%的混合样,磁选可获得品位16.02%,回收率88.61%的锰精矿,选别指标较好。     

含银铁锰氧化矿石选矿工艺研究

研究了采用浮选铁—磁选锰联合工艺从内蒙古某地的含银铁锰矿石中回收赤铁矿、硬锰矿及软锰矿。试验结果表明:原矿经一次粗选、一次扫选、一次精选,获得铁品位61.79%赤铁精矿,铁回收率75.80%;铁浮选尾矿经强磁选,获得锰品位32.02%的锰精矿,锰回收率80.63%;银在铁精矿和锰精矿中的总回收率为84.60%。试验结果较为理想。     

广西某低品位碳酸锰矿选矿试验研究

针对广西某低品位碳酸锰矿嵌布粒度细、单体解离困难、铁硅含量高、以菱锰矿为主等特点,经研究,试验采用湿式强磁选法回收该锰矿。在磨矿细度-0.074 mm占75%、粗、扫选磁场强度1.35 T、精选磁场强度1.07 T条件下,进行一粗一精一扫强磁选试验,实验室小型闭路试验可获得锰品位15.53%、锰回收率77.79%的锰精矿;扩大连续试验可获得锰品位15.57%、回收率76.18%的锰精矿。     

高磷软锰矿磁选-微生物脱磷工艺

对高磷软锰矿首先采用强磁选提高锰品位并初步脱磷,然后用微生物深度脱磷.对含锰17.4%,P/Mn为0.010 9的软锰矿,经强磁选后,锰精矿中Mn品位提高到22%以上,P/Mn降低至0.008 0;用一种解磷菌对磁选锰精矿进行细菌脱磷,脱磷率最高可达85%,脱磷后锰精矿中P/Mn达到0.001 5,符合冶金用锰P/Mn为0.003的要求.     

碳酸锰干选线磁选机包辊技改推广应用

针对碳酸锰干选线存在的粘辊问题,根据磁选机构造及矿山生产实际情况,对磁选机进行包辊技改,同时对干选线采取单独处理露采原矿的措施。经技改后,精矿锰品位由16.89%提高至18.09%,锰品位提升幅度由1.21%增加至2.58%,尾矿锰品位由9.14%降低至4.97%,精矿产率下降6.08%,金属回收率基本不变。该项技改能为下游产业链节约磨矿及冶炼成本约419.52万元/年,为选厂节约生产成本约70.58万元/年。     

微细粒贫锰矿选矿回收工艺研究

采用磁选、浮选工艺流程对连城锰矿微细粒锰矿泥进行了选矿回收工艺研究。试验结果表明:含锰6.83%的微细粒锰矿泥采用单一磁选选别获得了精矿锰品位22.49%,锰回收率64.12%的选别指标。采用磁选-浮选工艺选别,获得了精矿锰品位40.15%,锰回收率43.14%的选别指标。     

广西某地氧化锰矿的选矿试验研究

试验研究从工艺矿物学入手,针对广西某氧化锰矿石锰矿物嵌布粒度粗细不均的特点,制定较为合理的分级—磁选流程,取得了较为满意的指标,获得放电锰精矿锰品位44.47%、MnO2品位66.23%、铁品位3.06%、锰回收率60.45%。     

云南某低品位软锰矿强磁选工艺研究

针对云南某低品位软锰矿进行强磁选工艺试验,探索磁选流程并重点优化磨矿细度、磁场强度、脉动冲次、棒介质直径对锰精矿指标的影响。在较佳的分选条件下,原矿经"一次粗选、一次精选"高梯度强磁选流程选别后,可获得品位为29.50%、锰回收率为83.45%的锰精矿。     

勉略阳小型氧化锰矿选矿厂工艺流程研究

陕西勉略阳三角区锰矿属低磷低铁 ,高硅或高磷低铁氧化锰矿。经长沙矿冶研究院DPMS永磁强磁选机一次磁选试验证实 ,在给矿粒级 - 6mm时 ,可将手选锰矿品位提高 4～ 8个百分点 ,锰回收率 90 % ;将跳汰精矿锰品位提高 10个百分点 ,锰回收率 91% ;将跳汰尾矿锰品位提高 9个百分点 ,锰回收率 90 %。提示本地区小型锰选厂应将现有的手选 ,跳汰等单一选别手段改造成为以强磁选为主的工艺流程     

留矿法和下向分层法在云南斗南锰矿区的运用

云南斗南锰矿针对北翼倾角在40（°）-70（°）之间,以F13断层为界的西边薄矿体尝试并段采矿,即北翼8中段巷道开拓到F13断层即开始单翼退采,F13断层西边矿体从北翼9中段采出,这样9中段F13断层西边采高为54m,可节省370m开拓巷道工程费。不同的采矿方法在该段中段使用,达到优势互补的良好效果。     

Experimental study on preparation of manganese rich slag by direct reduction melting separation of low manganese high iron ore

In this experiment, low manganese high iron ore with manganese grade of 27.7% and iron grade of 18.1% was used as the research object to reduce and prepare manganese rich slag. The obtained manganese rich slag can be used for smelting silicon manganese alloy to achieve the purpose of efficient utilization of low grade manganese ore. According to the results of composition analysis, XRD analysis and particle size analysis of the ore, the reduction melting separation method was used to prepare manganese rich slag from low manganese ore. The experimental results show that each parameter has a greater impact on the mass fraction of manganese and iron in the reduction melting separation slag of low manganese high iron ore and the recovery rate of manganese under the single factor test. At the same time, combined with the Box Behnke principle design scheme, three experimental factors including temperature, alkalinity and carbon content were selected. The influence of each factor on the recovery rate of manganese was studied by response surface method. The experimental results were analyzed to establish the corresponding polynomial model, and the optimal process conditions were as follows: reduction temperature of 1402℃, alkalinity of 0.10, carbon content of 10.04%, and the recovery rate of manganese was 97%. A verification test was conducted under the optimal conditions; the recovery rate of manganese was 95.80%, and the error was 1.24%, which proved that the response surface method was a reliable and accurate prediction model. At the same time, the results are instructive for the application of low manganese and high iron ore.     

某高钙氧化锰矿提锰降钙选矿试验研究

通过煅烧一消化一分级的方法对某高钙氧化锰矿实行选矿实验,结果表明该方法提锰降钙效果明显。平均含Mn11。95％,含CaO42．53％的矿样,经本方法处理后,精矿Mn品位为38．11％,回收率72．55％,去除CaO达85．36％,使用此精矿还原焙烧后制电解金属锰溶液,浸出率达95％以上,浸取液经常规净化后,杂质指标合格。按此方法获得的选矿尾矿,达到了消石灰的建材商品要求,CaO达65％以上。     

低锰高铁矿直接还原-熔分制备富锰渣试验研究

摘要：试验以锰品位27.7%,铁品位18.1%的低锰高铁矿为研究对象还原制备富锰渣,生产得到的富锰渣可用于冶炼硅锰合金,以达到高效利用低品位锰矿的目的。根据该矿的成分分析、XRD分析和粒度检测分析结果,采用还原 熔分法对低锰矿进行还原制备富锰渣试验,试验结果表明：单因素试验下各参数对低锰高铁矿的还原-熔分后渣中Mn、Fe元素的含量和Mn元素的回收率均有较大影响,同时结合Box-Behnke原理设计方案,选取温度、碱度以及配碳量3个试验因素,通过响应曲面法研究各因素交互作用下对Mn元素回收率的影响规律,对试验因素进行优化分析,建立相应的多项式模型。模拟优化得到最优的工艺条件为：还原温度1402℃,碱度0.10,配碳量10.04%,Mn元素回收率为97%。在最佳条件下做验证试验得出Mn元素回收率为95.80%,误差1.24%,证明响应曲面法预测模型具有可靠性,同时对低锰高铁矿的应用有重要指导意义。     

A review of the beneficiation of low-grade manganese ores by magnetic separation

ABSTRACT

Magnetic separation is an effective strategy for the upgrading of a variety of lean ores, including the beneficiation of low-grade manganese ores. This work reviews 24 studies on the magnetic separation of manganese ores; 6 of these studies report both a sufficiently high Mn grade (>44% Mn) and Mn/Fe ratio (>7.5) in the concentrate as to be suitable for use as high-grade feed materials in the production of ferromanganese. Of these 24 studies, the most efficient separation and enrichment was generally achieved by the reduction roasting of the ore prior to magnetic separation, rather than the direct separation of the ore. In both cases there was sufficient evidence for correlation, depending on the mineralogy, between the Mn and Fe grades of the ore and the final concentrate grade and Mn/Fe ratio. To yield a concentrate suitable for use in ferromanganese production, it is recommended that the ore contain a minimum initial concentration of ～25% Mn and ～10% Fe.     

广西大新碳酸锰矿石的干选试验研究

初次探讨用正交设计法来寻找YHXTG-4012型永磁干式强磁选机对广西大新碳酸锰矿石进行磁选试验的最佳工艺条件。试验结果表明：在水分为1%~2%,给矿口40 mm,磁筒电机频率45 Hz,磁筒挡板间隙30 mm,磁辊电机频率50 Hz,磁辊挡板间隙25 mm的最优工艺条件下,经干式磁选,碳酸锰原矿品位从15.93%提高到了22.22%,精矿产率62.33%,回收率86.95%,取得了良好效果。     

Cyanex272分离废水中锰钙制取电池级硫酸锰的工艺探索

针对钴盐生产过程中产生的含高锰、低铜、锌、钴、钙等离子的废水,本文研究采用硫化物沉淀去除Cu、Co、Zn杂质,再用Cyanex272有机萃锰甩钙、镁,产出精制硫酸锰液,经浓缩结晶制得的一水硫酸锰产品能够符合电池级硫酸锰的要求。本工艺采用萃取法使锰与钙、镁分离,避免了使用氟化物除钙、镁而造成的环境污染问题。     

高碳锰铁冶炼锰回收率的试验研究

锰的入合金率是锰矿搭配按成分计算法的理论基础。锰矿品位和二氧化硅含量对锰的回收率影响较大。在终渣碱度１．３、氧化镁和氧化铝含量均为１０％的条件下，通过高温熔融还原实验，初步研究了锰的回收率ε与品位α的关系．当２４％≤α≤４８％时，ε＝０．１５１＋２．８０１·α－２．７５６·α２