镍钼矿处理工艺研究现状

随着高品位镍、钼资源的开发日益匮乏,高效低成本开发利用镍钼矿具有重要的意义。根据镍钼矿的资源状况及特点,介绍了不同的处理工艺,归纳起来大致有选矿工艺、火法冶金工艺和湿法冶金工艺等,对当前的各种工艺进行综述及展望,认为全湿法流程较有优势,以及提出现有镍钼矿处理工艺中存在的一些问题,并展望了镍钼矿处理工艺的发展趋势。     

我国钴湿法冶金行业废水处理概述

本文介绍了我国钴湿法冶金行业各种废水的来源及分类,详细叙述了各类废水的处理工艺和设备情况。     

太钢冶金渣资源化利用现状与建议

阐述了太钢冶金渣处理工艺、资源化利用技术以及冶金渣资源化技术面临的问题，在此基础上提出了太钢冶金渣处理工艺优化方案及其资源化技术发展方向。     

镍钼矿处理工艺的研究现状

分析介绍了镍钼矿的矿物组成特点,综合评价了镍钼矿处理工艺的研究现状,对比了镍钼矿湿法冶金工艺与火法冶金工艺的优缺点。提出采用湿法冶金工艺处理镍钼矿在很多方面都优于火法冶金工艺,以及现有镍钼矿冶金工艺中存在的一些问题,并展望了镍钼矿处理工艺的发展趋势。     

微波辐照—盐酸浸出制备酸溶性富钛渣的探索

探讨了将微波新技术应用于钛铁矿冶金的可行性，结果表明，钛铁矿精矿用“微波辐照－盐酸浸出法”能制得供硫酸法生产钛白酸溶性富钛渣，且具有方法新、能耗低、工艺简便等特点。     

我国的钛铁矿资源及其利用

本文介绍了我国钛铁矿的种类和分布,并根据各类钛铁矿的特性,分析讨论了不同钛铁矿与生产各种钛制品工艺之间的适应情况。     

红土镍矿处理工艺研究现状

随着可开采硫化镍矿的日益枯竭,高效低成本的开发利用红土镍矿有着重要的意义。根据红土镍矿矿床的不同分层,介绍了不同的处理工艺,归纳起来大致有火法冶金工艺、湿法冶金工艺、生物冶金工艺等,对当前的各种工艺进行综述及展望,认为回转窑还原焙烧-磁选生产镍铁工艺和常压浸出工艺具有发展前景,为综合利用红土镍矿提供参考。     

回转窑法处理含锌冶金尘泥洁净生产工艺研究

回转窑法处理含锌冶金尘泥是当前一种比理想的处理工艺,但由于该处理工艺存在诸多环保不达标等问题,制约了其在行业内的发展和推广。本文就当前我国回转窑法处理钢铁企业含锌冶金尘泥工艺及化学反应原理进行了详述,分析了环保不达标的主要原因,并针对该处理工艺提出了一整套全流程环保达标的解决方案。改进后的回转窑法处理含锌冶金尘泥的工艺可以达到钢铁行业超低排放标准,实现回转窑法处理含锌尘泥的全流程洁净生产,为冶金固废处理企业对含锌冶金尘泥的清洁处理提供了参考。     

采用“锈蚀法”处理低品位钛铁矿生产一级品人造金红石的理论及实践

本文对采用“锈蚀法”处理低品位钛铁矿（TiO_2<57%）生产一级品人造金红石进行了冶金理论计算与论述,并在工业生产实践中得到验证,证明理论与实践相符。该工艺原设计生产一级品只能采用（TiO_2≥58%）高品位钛铁矿,但国内目前所产钛铁矿均低于57%。文章为挽救该工艺起了重要作用,使该新工艺在中国立了足。并成为重要的工业方法之一。     

冶金炉渣资源化探讨

介绍了冶金渣处理工艺,以及高炉渣、炼钢炉渣的应用,为钢铁企业回收和利用冶金渣,提供参考.     

电焊条用钛铁矿的介电特性及微波加热特征

电焊条用含钛原料的介电特性研究对于拓宽焊条制造原料来源和发展微波加热制备还原钛铁矿具有重要的指导意义.采用同轴探头反射法测定了钛铁矿粉末（含TiO237%～47%）在2.45 GHz频率下和20～80℃之间的介电特性,并测定钛铁矿在微波场下的温升特性.研究结果表明：钛铁矿的介电常数和介电损耗因子及损耗角正切随着温度的上升而增加,介电特性总体随着含钛品位增高逐渐增强.钛铁矿的穿透深度在40～80℃之间随温度增加逐渐降低,微波加热钛铁矿的最佳物料厚度为3～6 cm.微波场下钛铁矿的升温曲线表明温度和微波加热时间具有一个非线性关系.     

1种钛铁矿的还原实验研究

镇安某铁矿属于钛铁矿,因铁品位低,钛品位高,该矿钛铁难以分离,不能得到合理的利用。试验通过研究分析,采用煤基直接还原-磁选工艺处理矿石,能够有效地实现钛和铁的综合利用。经过加工的矿粉在煤／矿质量比为14：100,还原温度为1150℃,催化剂为3％的条件下,通过煤基还原180min,然后经过磁选可获得铁品位为76．56％、钛低于8％的铁精矿。     

A Review on the Recovery of Titanium Dioxide from Ilmenite Ores by Direct Leaching Technologies

Pretreatment of ilmenite are required to enhance leaching efficiency of ilmenite. Strong acid leaching is promising in terms of the purity of the produced TiO2, low energy consumption and waste management. The effect of several factors on the acid leaching kinetics in reported processes was reviewed. Temperature, time and acid concentration significantly affect the dissolution of titanium and impurities in ilmenite. The addition of either iron powder or chloride/sulfate salts affects significantly the leaching rate of ilmenite. Either HCl leaching followed by solvent extraction or alkaline leaching followed by hydrolysis-calcination is recommended for the production of pure TiO₂ from ilmenite.     

Evaluation of Ilmenite as Dense Medium for Dry Coal Fluidized Bed Beneficiation

ABSTRACT

Published work on dry dense medium fluidized beds has mainly used magnetite and fine coal to make up the dense medium. Magnetite is used to achieve the required cut densities, but its recovery and reuse are problematic because it attaches to the surface of the coal and discard material, and its surfaces become contaminated. This study focused on using ilmenite (FeTiO₃) as an alternative medium in the dry dense medium fluidization process due to its favorable surface properties of hydrophilic and sphericity. The initial investigation considered a reference medium, which consisted of ilmenite and sand (used for base-case tests), and a second medium, consisting of ilmenite and fine coal, which resembled that currently used in the dry dense medium fluidized bed process. Experiments to evaluate the performance of the ilmenite were carried out in a laboratory-scale cylindrical fluidized bed. Losses of the ilmenite were investigated by mixing and recovering the ilmenite using two different coal samples of 13.2–50 mm particle size. Density tracers were used to determine the écart probable moyen (EPM). At optimal conditions, the bed media consisting of sand and fine coal with ilmenite had EPM values of 0.045 and 0.05 at cut densities of 1.8 and 1.58 g/cm³, respectively. No ilmenite losses were observed. The ilmenite surfaces contained no contaminants after 10 cycles. The highest ilmenite recovery achieved from the bed after high-intensity magnetic separation was 99.79%.     

氧化还原—机械活化对攀西钛铁矿浸出行为的影响

研究了"氧化还原—机械活化—盐酸浸出"的方法对钛铁矿中主要杂质离子铁离子浸出行为的影响,并采用XRD、SEM/EDS对处理前后的矿物结构进行分析。结果表明:经过氧化还原—活化处理,钛铁矿的物相明显发生改变,铁迁移至表面,形成了富铁的新表面,表面变得疏松、凹凸不平,出现了大量的微裂缝,铁浸出率有了显著的提高。     

Effect of Temperature on Carbothermic Reduction of Ilmenite

The reduction of ilmenite (FeTiO3) has been studied extensively. Temperature for the carbothermic reduction of ilmenite ranges from 900 ℃ to 1 400 ℃, and the reduction degree of Panzhihua ilmenite increases with increasing temperature. X ray diffraction analysis and SEM analysis were used to identify the phase before and after reduction, and to identify the morphology of reduced samples respectively. It is found that the reaction initiates at about 860 ℃. The reaction rate varies with temperature simultaneously. Impurities in Panzhihua ilmenite decrease the reduction degree. Magnesium and calcium oxide-rich zone is formed preventing complete reduction of Fe^2 . In general, the reaction products are iron, Ti3O5 and carbon.     

钛铁矿流态化氧化机理研究

对低品位钛铁矿进行预氧化、预还原等预处理后可满足硫酸法生产钛白粉工艺所需高品位钛铁矿的要求。本试验采用流态化预氧化方法处理风化程度低、含硫较高的钛铁矿。结果表明 :流态化氧化可大幅度地降低钛铁矿中硫含量 ;钛铁矿流态化氧化的适宜温度为 :80 0～ 90 0℃ ,且在此温度范围内 ,随温度的升高 ,钛铁矿的氧化速度增加 ,在 90 0℃时 ,5 0min钛铁矿基本能完成氧化     

钛铁矿浮选捕收剂的研究及应用状况浅述

总结了钛铁矿浮选主要的常规捕收剂和新型组合捕收剂。开展新型高效组合捕收剂的研究,是提高低品位细粒钛铁矿回收率的新方向。     

钛铁矿全浮选工艺的调和平均模型多响应优化

采用响应曲面法优化钛铁矿全浮选工艺,获得了钛铁矿精矿品位47.51%、回收率45.12%的指标.提出以调和平均确定总的满意度函数,即调和平均模型.并和算术平均、几何平均模型的多响应优化法优化钛铁矿浮选工艺做出比较.结果表明：3个模型均是显著的,且预测能力相当.但是,3个模型对工艺条件的优化效果却不相同,表现为：调和平均模型指标〉几何平均模型指标〉算术平均模型指标.     

攀钢密地选钛厂细粒级钛铁矿回收工艺的研究与实践

分析“七五”，“八五”期间各科研院所有关细粒级钛铁回收的研究资料。发现细粒级铁铁矿中含泥量大，品位低是造成细粒级钛铁矿浮选精矿品位难合格（TiO2≥47%)的主要原因。据此，设计出新的工艺流程，经工业试验及生产证明。该工艺流程能有效回收微细粒级钛铁矿。精矿品位稳定。生产运行平衡。