合理配矿是确保出窿品位稳定的有效途径

贯彻执行国家矿产资源回收政策 ,坚持合理的回采顺序 ,坚持“大小、贫富、厚薄、难易”兼采的原则 ,降低贫化损失率 ,合理进行配矿 ,是确保矿石出窿品位稳定的关键 ,是提高企业经济效益 ,保证矿山企业可持续发展的重要途径。本文根据不同生产区段矿石品位的变化 ,阐述了配矿原则和经济意义     

含铷云母精矿铷浸出试验研究

对含铷云母精矿进行多浸出方式探索对比试验研究,研究表明,精矿采用氯化钙为焙烧助剂,精矿:氯化钙配比1∶0.2,焙烧温度850℃焙烧时间30~40 min,焙砂磨细至-74μm≥95%,水浸条件以温度60℃、L/S=2.0~3.0、浸出30~40 min,采用二段焙烧-水浸,铷浸出率可达91.97%以上。浸渣中铷可降至600ppm以下。铷溶浸效果较为理想。     

某细粒难选赤褐铁矿提铁降磷新工艺工业试验

针对某难选细粒赤、褐铁矿,在小型试验研究已经取得成功的情况下,做了选择焙烧-浸出新工艺工业试验研究,获得了最佳工艺操作条件:焙烧温度1 000℃、回转窑转速1 000 r/h,浸出药剂浓度15%(质量分数),浸出药剂用量液固比R=1∶1,浸出时间8 min.采用自行研制的螺旋连续浸出机作为浸出设备及自行研发成功的新一代浸出降磷药剂作为浸出降磷药剂,最终获得了铁品位63.00%以上,磷品位0.16%,铁回收率90.00%以上的铁精矿产品指标.     

某细粒难选赤褐铁矿提铁降磷新工艺研究

针对云南某细粒难选赤褐铁矿石含磷超标,须提铁降磷方能利用,但采用常规的强磁选、重选、浮选方法均无效果的情况,采用焙烧一浸出新工艺及自行研发的浸出剂,在焙烧温度为1000℃、焙烧时间为15min、浸出剂浓度为10％、浸出液固比为3：1、浸出时间为5min条件下,获得了精矿铁品位为66．43％、磷品位为0．131％、铁回收率为98．89％的理想指标,目前正开展工业试验。试验结果为难选铁矿资源的开发利用提供了新的思路。     

提高铁精矿细度的探讨

针对选矿厂长期存在的铁精矿粒度粗的问题,从一段磨矿的局限性和磨前预选工艺的负面影响简单地分析原因,通过对分级溢流和铁精矿进行筛析研究．提出了应用高频细筛分别控制分级溢流或铁精矿粒度的两套改造方案。     

新疆某铁矿铁精矿粉管道输送可行性研究

阐述了新疆某铁矿铁精矿粉管道输送可行性研究,对类似矿山具有一定的借鉴作用。     

河北某铁矿铁精矿制备超级铁精矿试验

某铁矿石铁品位是56.36%,主要以赤褐铁矿的形式存在,脉石矿物主要是石英和铝土矿。对该铁矿石采用了悬浮磁化焙烧—磁选工艺实验研究,在给料粒度为-0.074 mm 56.11%,焙烧温度为560℃,总气量为500 mL/min、CO浓度为30%,还原时间为15 min的条件下进行焙烧实验,然后将焙烧产品磨至-0.074 mm 95%,在磁场强度90 kA/m,选别时间5 min的条件下进行弱磁选实验,获得了铁品位64.42%,铁回收率94.49%的高品位铁精矿,为处理难选铁矿石提供了解决办法。     

诌议攀钢矿业公司铁精矿生产能力

通过对“十一五”期间铁矿石和铁精矿生产能力的分析,从而为矿业公司如何满足攀钢“十一五”发展规划提出建议,对类似矿山长远发展决策提供参考.     

The entrainment effect on the performance of iron ore reverse flotation

An iron ore mineral processing plant in Brazil treating Itabirite ore was assessed by sampling a circuit consisting of Wemco 144 mechanical cells, as part of the AMIRA P9P collaborative research project. This paper presents and discusses the results of entrainability, water recovery and quartz and hematite grades associated to hydrodynamic parameters. The results indicated strong correlation between water recovery and hematite losses which was intensified by the operating conditions of the circuit.A potential alternative to reduce the hematite losses through entrainment and to increase quartz removal was to modify the traditional circuit design to treat rougher and cleaner/recleaner tails in different stages. In addition, the scavenger residence time must be matched to the quartz floatability. Changes to design and operation of these circuits are needed to sustain concentrate recovery and grade as iron ores become finer.     

我国磁选设备及铁矿石预选技术

介绍了目前我国磁选设备的研制及应用现状，并就干式弱磁选、强磁选和重选等工艺用于我国铁矿石预选的技术经济状况及推广应用价值进行了论述。     

Current situation and comprehensive utilization of iron ore tailing resources

The situations, characteristics, and status of iron ore tailing resources in China are presented. The approaches of comprehensive utilization of iron ore tailings have been analyzed. It has been proved that the comprehensive utilization of iron ore tailings is efficient, socially beneficial and improves environment situation. The scopes of comprehensive utilization of iron ore tailings are reported. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 105–110, July–August, 2006.     

Infrared thermography: An approach for iron ore gradation

There are insufficient high-grade iron ores currently being mined to meet world demand for steel production. In order to meet raw material demand in India, lower grade ores with high alumina contents are being crushed and beneficiated, mainly by gravity techniques requiring water. However, the scarcity of water in the mining areas warrants the development of some dry gradation techniques for iron ores so that the inferior ore specimens can be rejected in order to improve the grade of the concentrate. The present gradation of ores by mineralogical/chemical methods is time-consuming and cumbersome. This paper presents an Infrared (IR) thermography-based non-invasive technique for the faster gradation of iron ores, taking into account the variation in thermal absorptivity of the ore constituents. Iron ore samples from the Joda, Noamundi and Barsua mines, with Fe contents ranging from 52 to 67 wt.%, were selected and crushed to around 10 mm particle size. The crushed iron ores were uniformly heated using a microwave oven, for a time period sufficient to create a difference between the ore particles in the extent of their respective infrared emissions. The thermal images of the heated particles were captured by IR thermography and the peak temperature of each ore particle was obtained from the thermal profile. A computer program was developed for ore gradation based on the peak temperature of each ore particle which corresponds to its iron content. A threshold was selected through chemical verification of the ores and accordingly the ores were categorized as high-, medium- and low-grade.     

湖北省鄂西某高磷铁矿中磷的赋存状态研究

通过对湖北某高磷铁矿进行研究,测定出了矿石的化学成分、各组分的赋存状态、含磷矿物的嵌布特征及其单体解离度。研究结果表明：P₂O₅ 主要以胶磷矿存在,大部分胶磷矿呈微细的包裹体嵌布在菱铁矿集合体中,少量沿菱铁矿和脉石之间分布,一般介于0.005～0.018mm之间,欲通过机械选矿方法获得低磷铁精矿的难度极大。     

金岭矿区铁矿资源特点及开发利用的思路

在分析金岭矿区铁矿资源特点及开发利用现状的基础上，提出开发利用山东本省的铁矿资源，解决矿石短缺的思路。     

Hydrometallurgical processing of Platreef flotation concentrate

Platinum producers are evaluating hydrometallurgical process routes to extract platinum group metals (PGM) and base metals (BM) from flotation concentrate that are alternative to conventional pyrometallurgical matte smelting treatment of flotation concentrates. This approach would attract several potential benefits to the cost-effective processing of lower-grade and high-chromium concentrates. Ivanhoe Nickel and Platinum Ltd. wished to investigate this option on samples arising from their Platreef project in the northern limb of the Bushveld Complex in South Africa, from concentrate containing 1.5 g/t Pt, 2.5 g/t Pd and 0.5 g/t Au, as well as 1.5% Ni and 1.2% Cu. Other PGMs assayed rather low grades in the concentrate (Rh 128 ppb; Ru 153 ppb; Os 18 ppb; Ir 31 ppb) so the focus was on Pt, Pd and Au in this study. Some twenty-two hydrometallurgical process flowsheet variants were considered for evaluation in a testwork programme combining several conventional and proprietary unit process technologies.The testwork outcomes suggested that a hydrometallurgical flowsheet alternative to smelting (the patented Kell Process) is potentially a practical, environmentally benign and energy-efficient approach for treating low-grade Platreef concentrate with relatively low risk. This process broadly comprises selective leaching of base metals by pressure oxidation, followed by leaching of PGMs after a roasting pretreatment step shown to render PGMs and particularly Pt amenable to leaching. The process embodies separation of the value metals (PGM and base metals) into separate chloride and sulfate solution streams, respectively, and impurity elements (Fe, Al and gangue) into a tailings product. Key elemental deportments from the un-optimized process were Ni 96%, Co 94%, Cu 94%, Pt 96%, Pd 94% and Au 87%.Preliminary work indicated that further improvements in value metal recoveries, impurity separations and reagent consumptions may be gained from further optimization of the individual unit processes. Moreover, the recycle of key reagents uses existing proven technologies, rendering the process more economically and environmentally favourable. Initial assessment suggests that the Kell Process should offer both economic and environmental benefits over conventional pyrometallurgical matte smelting treatment of Platreef flotation concentrate.     

高硅铝土矿焙烧预脱硅研究现状评述

论述了国内外焙烧预脱硅工艺处理硅铝土矿的理论及实践研究工作,评述了该工艺研究方面仍存在的难点及需努力的方向,指出继续研究该工艺的现实意义     

某含硫高碳难处理金矿工艺研究

高硫、高碳难处理金矿是目前常见的金矿资源,对传统浸出工艺带来巨大挑战。针对某企业的含硫高碳金矿,在工艺矿物学的基础上,了解自然金的富存状态,采用“浮选+焙烧+浸出”工艺处理该金矿。试验结果表明,在浮选阶段当磨矿细度-200目占比80%时,以硫酸铜为活化剂,丁基黄药+丁铵黑药作捕收剂时,得到Au品位25.31g/t、Au回收率91%的精矿。再将精矿在600℃环境中焙烧1h,浸出剂绿金30g/t,浸出液pH=12-13,液固比8的条件下浸出36h,精矿中金的浸出率达到89.38%,显著提高金的浸出率。为此类型难处理金矿提供借鉴。     

钢铁工业合理利用两种铁矿资源的研究

分析了合理利用国内国外两种铁矿资源的必要性和可行性，利用系统优化理论及技术经济分析方法对我国铁矿石的区域平衡、宏观范围内的金属量平衡和优化比例，以及建矿模式改革的方向等进行了研究和论述。     

The kinetics of iron dissolution from chromite concentrate

The aim of the present investigation is to reduce the Fe/Cr ratio of chromite concentrate so that it can be used for the production of ferrochrome. For this purpose the dissolution of iron from chromite concentrate in sulphuric acid was investigated in the temperature range 303 to 363 K. The effect of stirring rate, temperature and particle size on dissolution rate were studied. During the initial stages of the process, chemical reaction at the mineral surface is rate controlling, while during the later stages diffusion through the product layer is rate controlling. Overall the process follows the mixed control model embodying both chemical reaction and diffusion. The activation energy for dissolution of iron was found to be in the range of 23 to 26.7 KJ/mole.     

铁精矿提铁降硅工艺的改进及建议(二)

2　提铁降硅工艺流程的特点2 1　对原矿的适应性更强鞍山矿业公司所属的处理红铁矿的齐大山选矿厂和东鞍山烧结厂改造后的工艺流程对原矿的适应性更强 ,这是两个选矿厂铁精矿提铁降硅工艺流程改造的重要特点之一。东鞍山铁矿石具有矿物组成复杂、嵌布粒度细、结构构造复杂、硬度差异大的特征 ;齐大山铁矿石矿物组成较为复杂且具有精细不均匀嵌布 ,适于阶段磨选工艺流程的特征。两个铁矿山在开采的过程中FeO的变化均较大。实施改造后 ,使工艺流程本身对两个铁矿山的铁矿石在选别上更加适应。1 )齐大山选矿厂改造后和东鞍山烧结厂工业试验的…