Fluorinated xanthates as collecting agents in copper-nickel ore flotation

Research data on intensification of copper-nickel ore flotation by applying the fluorinated xanthates are reported. Introduction of fluorinated agents at 3–50% rate of the total collector consumption improves the recovery of valuable components. It is established experimentally that the copper and nickel recovery into the flotation concentrate grows by over 10%.     

新型抑制剂用于铜镍矿选矿的工业实践

四川某铜镍矿含铜0.35%、含镍0.78%,脉石以滑石、蛇纹石类易浮、易泥化的富镁硅酸盐矿物为主,生产现场由于不能对脉石进行有效抑制,只能采用预先脱泥工艺,不仅造成铜镍损失严重,且流程复杂。采用新型有机抑制剂WY-03后,获得了镍精矿镍品位6.36%、镍回收率82.02%,铜精矿铜品位23.97%、铜回收率72.96%的优异指标。     

捕收剂组合在硫化铜镍矿浮选中的应用

论述了丁基BX与异戊BX各50%用量组合在硫化铜镍矿石中的应用,解决了现场使用单一丁基BX或异戊BX的缺点,两种药剂的复合作用提高了技术指标,取得了令人满意的效果。     

Fahl ore flotation

The authors discuss flotation of fahl ore. It is proved that tennantite should be separated into an individual copper product in order to enhance overall copper recovery and mitigate ecological impact by means of preventing arsenic volatilization under smelting. Single mineral fractions of pyrite, chalcopyrite, tennantite, secondary sulfides, sphalerite and quartz sampled in the Ural region, as well as the samples of copper-zinc ore containing fahl ore are examined. The research involves oxidation of copper sulfides and pyrite under grinding in different conditions. Concentration of oxygen and sulfur-bearing ions is under control. The differences in oxygen consumption, oxidation of pyrite, tennantite and other sulfides are used to develop the mode of tennantite separation from other copper sulfides, sphalerite and pyrite. Based on the research findings, the authors recommend a flotation technology for copper–zinc pyritic ore with high content of tennantite to separate tennantite and secondary copper sulfides in different flotation circuits at varied pH.     

优化哈密铜镍矿分离浮选过程的实践

针对亚克斯公司哈密铜镍矿分离浮选中铜精矿品位低、镍精矿中含铜高、药剂用量大、分离效果差等问题,结合入选矿石性质变化和生产统计数据,通过调整浮选流程、改进药剂品种和加药方式、优化部分装置等技术措施。实践表明:铜镍分离作业改为二粗二扫四精,使用果壳活性炭与改造后的加药装置,优化管线材质与使用配置后,分离浮选过程稳定,生产技术指标提升。铜精矿品位由23.72%提升至25.46%,且伴生金含量稳定在1g/t以上,镍精矿含铜由0.705%降至0.493%,活性炭单耗由316g/t下降至137g/t,石灰单耗由2 035g/t降至1 239g/t,新增经济效益260.9万多元,技术改造取得了显著成效。     

铜镍矿选矿工艺改进及生产实践

针对喀拉通克铜镍矿选矿工艺存在的问题,采用捕收剂Z-200替代原混合捕收剂,并通过试验确定了合理的药荆制度.新选矿工艺降低了药剂用量,使药剂成本由原来的15元/t原矿降低到9元/t原矿,具有显著的经济效益.     

Iron ore slimes flotation

This investigation addressed the processing of ultrafine tailings (slimes) from an iron ore concentrator via reverse cationic flotation to produce pellet feed fines, despite the traditional view that ultrafine particles do not float.Following size analyses, chemical and mineralogical characterisation, desliming and flotation tests were performed aiming at verifying the flotation behaviour of the slimes. Different dosages of collector and depressant were used.The promising results of the laboratory scale tests led to carrying out pilot scale tests with the currently produced slimes, and the slimes that will be generated in the future, after the commissioning of the mining company’s expansion project.It was observed that a reverse cationic column flotation process, using high depressant dosage, was selective, yielding high grade concentrates with low impurity content at high levels of iron recovery, approximately 60% mass recovery and 80% metallic recovery in the flotation stage. Excellent valuable product grade (less than 1% silica) and reject product grade (approximately 12% iron) were achieved, resulting in high selectivity levels. The overall mass recovery reached 20%.     

铜镍硫化矿浮选精矿降镁研究进展

我国铜镍矿石资源主要为富含MgO硅酸盐脉石矿物的低品位硫化矿。浮选是实现铜、镍金属富集的主要途径,然而浮选精矿普遍存在MgO含量过高的问题。闪速熔炼要求MgO含量必须低于6.5%,精矿中高含量的MgO会导致冶炼炉温升高、炉渣粘度增大、炉子结瘤、渣相分离困难,导致回收率降低和冶炼成本增加。对此,国内外科研人员做了大量研究,但是普遍存在降低镁含量的同时铜镍损失率过大的问题,降低铜镍硫化矿精矿中镁含量一直是选矿的技术难题。本文就国内外铜镍硫化矿浮选精矿降镁研究进展进行了总结概述,分析了降镁机理并提出了发展趋势。     

Influence of sulfur-containing ions on selective flotation of copper-nickel ores

Journal of Mining Science -     

新疆某铜镍矿石工艺矿物学研究

本文研究了某铜镍多金属硫化矿的工艺矿物学,结果表明该矿石原矿中主要有用矿物为镍黄铁矿和黄铜矿,主要金属硫化物为磁黄铁矿,少量黄铁矿。脉石矿物主要为蛇纹石、橄榄石和阳起石等镁硅酸盐矿物。矿石具有较高的综合回收利用价值,建议开展对该矿铂、钯、金、银的赋存状态研究和相应的选矿工艺研究,以最大限度地回收该矿中贵金属矿物。     

Apatite flotation from brazilite-apatite-magnetite ore

The article reports research findings on flotation of apatite from brazilite-apatite-magnetite ore by domestic and foreign manufacture reagents. The agents Phospholan PE65 and Arcomon SO exhibit higher selectivity as compared to saponified tall oil fatty acids.     

Use of fluorinated alcohols to intensify copper-nickel ore grinding

The experimental data are reported on intensification of the copper-nickel grinding by feeding fluorinated saturated mono-atomic alcohols of a general formula H - (CF₂CF₂) _n - CH₂ - OH into a mill. The feeding of this reagent into a mill at the rate of 25–100 g/t of feed provides better exposure of aggregates in the ore preparation circuit thus intensifying the subsequent ore flotation. The increment of copper and nickel recovery into a concentrate amounts to more than 4%. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 95–100, July–August, 2008.     

青海夏日哈木铜镍矿石工艺矿物学研究

青海夏日哈木铜镍矿石属硫化镍矿石,含镍0.63%~0.80%,铜0.14%~0.20%,钴0.025%~0.028%,是主要回收对象。矿石矿物组成复杂,铜矿物以黄铜矿为主,少量的墨铜矿和微量的方黄铜矿及铜蓝;镍矿物以镍黄铁矿为主,有微量的紫硫镍矿、砷镍矿、辉砷镍矿及含钴的辉砷镍矿等;铁矿物主要为磁铁矿,微量赤铁矿及菱铁矿。铜、镍矿物嵌布特征复杂、嵌布粒度细微,普遍被脉石矿物包裹,同时铜、镍矿物自身相互紧密连生;矿石中含镁脉石矿物较多,具有质地柔软,容易泥化,自然可浮性好,吸附能力强的特点,将给铜、镍矿物的分选带来不利的影响。     

四川会理某低品位混合铜镍矿石浮选工艺研究

该矿含铜0.51%、镍0.35%,铜氧化率16.57%、镍氧化率21.51%。在工艺矿物学研究的基础上,采用铜镍混合浮选工艺流程及工艺条件,采用活性炭脱药,在浮选前对矿浆进行较长时间充气搅拌,使铜、镍分离获得令人满意的效果,获得了较高的铜、镍选矿技术指标。铜精矿含铜19.50%、回收率78.64%,镍精矿含镍3.40%、回收率55.53%。     

新疆某难选硫化铜镍矿选矿试验研究

根据新疆某硫化铜镍矿矿石的工艺矿物学特性,进行了详细的选矿试验研究,采用一粗一精两扫、中矿顺序返回的铜镍混合浮选流程,使用碳酸钠做pH调整剂,六偏磷酸钠做分散剂,羧甲基纤维素做抑制剂,混合黄药做捕收剂,处理该矿石,得到了混合精矿含镍10.89%、含铜4.27%,镍回收率81.61%、铜回收率85.03%的指标,氧化镁含量低于6.8%,产品质量符合冶炼要求。对六偏磷酸钠和羧甲基纤维素在硫化铜镍矿浮选中的作用机理进行了分析,结果表明六偏磷酸钠能分散蛇纹石与硫化矿物,降低蛇纹石对硫化矿物浮选的影响,而羧甲基纤维素能抑制含镁硅酸盐矿物的上浮,实现硫化矿物与含镁硅酸盐脉石的浮选分离。因此,在含有多种镁硅酸盐脉石矿物的硫化铜镍矿中同时使用六偏磷酸钠和羧甲基纤维素是该类矿石高效利用的关键。     

Improved selectivity of sulfide ore flotation

The article analyzes flotation and adsorption capacity of a new complexing reagent AMD (nitrogen and oxygenated organic compound belonging to phenylpyrazole class) toward sphalerite, chalcopyrite and pyrite, combined with complexing modifiers, at varied consumptions of the reagents, in wide range of alkalinity. The basis for improvement of pyrite and sphalerite separation in flotation is provided.     

Bioleaching of copper ore flotation concentrates

The bioleaching of flotation concentrate is a new method for copper recovery that could form the basis of an economic and environmentally friendly process. The main objective of this work was to evaluate a bioleaching process from the treatment of two concentrates, (i) a copper gold bearing concentrate and (ii) an ordinary copper flotation concentrate, using mesophilic bacteria. The special gold-bearing copper flotation concentrate was obtained from the Polkowice Mine. The second material was an ordinary copper flotation concentrate purchased from the Lubin Mine. Bioleaching experiments were carried out in 250 ml Erlenmayer flasks and a rotating bioreactor (biorotor). The most important operating parameters were copper dissolution (%) and surface area. A culture of Thiobacillus ferrooxidans was used for the bioleaching tests. The bioleaching maximum was obtained at both 12% and 15% of the solid. The effect of pyrite addition on the kinetics of copper concentrate bioleaching was also investigated. It was established that 3% of pyrite causes an increase in the bioleaching process. In the case of ordinary flotation concentrate bioleaching, 65% of the recovery was obtained at the initial stage (48 h). In the second stage, the copper recovery slowly increased and after 312 h 86% of the copper recovery was obtained. On the other hand, the surface area of copper concentrate initially increased (at 24 h it was 8.67 m²/g) and then slightly decreased in the second stage.     

Modified reagent mode in porphyry copper-molybdenum ore flotation

Test data on the selective reagent modes at bulk flotation cycle and modified carboxymethylcellulose (CMC) at a selection cycle for the bulk copper-molybdenum concentrate. The selected reagent mode at a bulk flotation cycle with industrial kerosene and Beraflot as collectors and OPSB as a frother made it possible to recover 87 % of copper and 82 % of molybdenum into a rough bulk concentrate. Tests with CMC application at the selection cycle revealed a potential opportunity to reduce 1.5–2.0 times the summary sodium sulfide consumption, to cut down running costs of pulp and depressant heating, and to improve molybdenum recovery with no negative effect on other parameters of the bulk concentrate selection. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 111–117, January–February, 2008.