中锰渣摇包法生产高硅锰硅的研究

通过对中锰渣摇包法生产高硅锰硅合金工艺开发性试验总结，确定了摇包生产的各项参数，为高硅锰硅合金生产提供了一种全新方法。应用该工艺生产高硅锰硅节能、无污染、产品质量好。     

关于高炉低硅冶炼的探讨

分析了高炉内硅的来源和硅在高炉内还原的特点,总结了目前国内外高炉低硅冶炼的现状,提出了高炉低硅冶炼的措施。     

烧结法生产氧化铝硅渣处理方法的工艺探讨

介绍了中州铝厂烧结法生产氧化铝的脱硅及硅渣处理工艺,论述了传统的硅法回头配料对高铝熟料烧成工艺的不良影响。通过对硅渣产量衡量及硅渣单独处理烧成工艺研究,提出了新的硅渣处理方法。采用新的硅渣处理工艺,能够简化生产组织,全面提高烧结法的经济效益。     

含钒液体除硅过程的研究

探讨了除硅过程的机理,研究了除硅剂种类、用量、液体pH值、温度、静置时间对除硅效果的影响.结果表明:在弱碱性条件下,添加除硅剂A对含钒液体除硅过程具有良好的效果,除硅率可达90%以上,且除硅过程不会造成溶液中钒的沉淀损失.     

浅述多晶硅生产用沉积载体

基于沉积载体硅芯的形态,介绍了圆硅芯、方硅芯和中空硅芯等3种加工方式,并从原料成本、设备折旧、能源消耗、人力成本、制造费用等关键生产要素方面对硅芯的生产成本进行估算,同时分析了硅芯的应用情况,并总结了多年来多晶硅生产实际应用的经验。     

低硅高锰钢生产实践

分析了低硅高锰钢生产过程中硅含量超标的原因。对转炉工序采取了弱沸腾出钢,严格控制下渣量等技术措施,有效控制了转炉工序的增硅;通过选择合理的精炼工艺并进行工艺优化,实现精炼工序增硅量的最小化,从而实现低硅高锰钢硅含量的稳定控制。     

关于高硅锰硅合金的生产与研究

论述了在高硅锰硅合金生产中,通过控制炉温的时间及采用合理的炉渣碱度制度,提高合金中硅含量,以得到稳定的高品级的高硅锰硅合金。     

世界半导体硅工业及其下游产业的进展

综述了世界半导体硅材料工业及其下游产业（硅半导体器件，硅电力电子器件，硅传感器，硅太阳电池）的进展和展望。     

COREX熔融气化炉内硅还原反应的特点

模拟了熔融气化炉的冶炼过程，根据实验结果分析了硅的还原反应过程，得到风口区域上部铁滴吸硅不平衡和渣中氧势由（ＦｅＯ）控制及纯氧操作条件下硅含量下降等结果，并将结果与高炉硅还原反应进行了比较，得到了熔融气化炉硅还原反应特点，并证实了熔融气化炉有利于生产低硅生铁。     

硅尘的应用现状及其开发前景

详细地论述了硅尘和特征、硅铁及工业硅生产现状及特点，介绍了硅尘应用的现状和合理利用硅尘的途径和方法，指出了硅尘应用的广阔前景。     

锗富集物中硫、砷及二氧化硅的控制

针对高硫、砷二氧化硅等优劣质原料中提取锗的过程中出现的质量问题，进行了除硫、砷及硅的研究。结果表明，采用高温除硫、氧化除砷及二段除硅效果显著，从而确保了锗富集物的质量达标。     

溶剂萃取法制备锂离子电池用硫酸钴工艺研究

研究了用粗氢氧化钴制备锂离子电池用硫酸钴的工艺.采用稀硫酸优溶除杂、还原浸出、氧化沉淀法除铁、锰、砷,氟化沉淀法除钙、镁,P204萃取深度净化除杂;P507萃取除钠及分离镍、钴,制备出适用于生产锂钴氧化合物的电子级硫酸钴.     

Study on preparation and application of novel saponification agent for organic phase of rare earths extraction

In view of the problem of ammonia-nitrogen wastewater pollution in rare earths extraction and separation, the novel saponification agent of organic phase, which is magnesium bicarbonate solution, was prepared with the natural rich and cheap dolomite as raw material through carbonation process. The behavior and purification of main impurities ions in the carbonation process as well as the application effect of the novel saponification agent in the extraction and separation was researched. The results showed that the concentration of Fe, Al, Si impurities ions was less than 5 ppm in the saponification agent through the development of effective removal technology, respectively. When the novel saponification agent was used in the extraction and separation, magnesium utilization rate was more than 95%, and rare earths extraction rate above 99.5% has achieved. Therefore, the technology could replace ammonia-water to saponify the organic phase in rare earth extraction and separation process.     

Effect of loaded organic phase containing mixtures of silicon and aluminum, single iron on extraction of lanthanum in saponification P507-HCl system

Emulsification troubled normal extraction process of rare earths due to the existence of non-rare earth impurities,especially Si,Al and Fe.Against this background,the effect of emulsification caused by Si,Al and Fe on the La extraction with saponification P507(2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) in chloride medium was systematically investigated.A series of experiments were carried out to study the relationship of the extraction capacity of La and the concentration of impurities.ZPM-203 polarizing microscope was applied to investigate the morphology of emulsification,and the cation exchange extraction mechanism of Fe and Al as well as La was clarified by IR spectra.The results showed that a low concentration of Si in organic phase would aggravate the emulsification with Al,and the formation of ME(micro emulsion) and club-shaped polymer would result in emulsification in the extraction of mixtures of Si and Al,single Fe,respectively.Furthermore,the accumulation of impurity such as Si,Al and Fe in the organic phase would severely reduce the extraction capacity of La simultaneously.     

萃取工艺复杂原液体系除铝效果研究

以铷铯萃取工艺为例，介绍了萃取前工序萃取原液除铝效果的研究情况，在已使用萃取作为主体工艺的生产中，若再加入不同萃取剂进行除铝的工序，将增加整条生产线的复杂性及成本。认为萃取工艺中宜采用化学法除铝，在总结前人除铝方法的基础上，对适于萃取工艺的复杂溶液体系除铝效果进行研究，通过对除铝试剂的选择、除铝pH范围的确定、氢氧化铝沉淀与再溶解现象的分析等方面进行试验，考察了铝的去除特性，对湿法冶金工业中常用的除铝处理技术的应用方式，提出建议及思路。     

Boron removal by titanium addition in solidification refining of silicon with Si-Al melt

In order to effectively remove B from Si for its use in solar cells, a process involving B removal by solidification refining of Si using a Si-Al melt with Ti addition was investigated. For clarifying the effect of Ti addition on B removal from the Si-Al melt, TiB₂ solubilities in Si-64.6 at. pct Al melt at 1173 K and Si-60.0 at. pct Al melt at 1273 K were determined by measuring the equilibrium concentrations of B and Ti in the presence of TiB₂ precipitates. The small solubilities of TiB₂ in the Si-Al melt indicate the effective removal of B from the Si-Al melt by Ti addition. Further, solidification experiments of Si-Al alloys containing B by Ti addition were performed, and the effect of Ti addition on the solidification refining of Si with the Si-Al melt was successfully confirmed.     

高铁、高硅溶液中萃取钼

沉淀钼酸铵后的溶液含铁、硅较高,为了综合回收利用钼,采用N235萃取分离钼。对影响萃取分离钼的因素进行考察。结果表明,采用20%N235+10%仲辛醇+70%的煤油体系在下述最佳工艺条件下可有效实现钼、硅、铁的分离,钼萃取率达到95.0%以上:萃取平衡时间3～5min、酸浓度5～20g/L、级数4～5级、相比O/A=1/2～1/4。     

低浓度钴溶液除铁、钙、镁和P204深度除杂工艺研究

研究了从低浓度钴溶液中除去铁、钙、镁的pH条件和P204萃取除杂工艺.除铁初步试验表明:黄钠铁矾法除铁时,将pH值控制在3.0～4.0之间,除铁效果很好,达到99％以上.在黄钠铁矾-针铁矿联合法的除铁操作条件下,除铁效果也达到了95.65％,且钴损率从21.3％降到了4.74％;低浓度钴溶液最佳除钙镁pH值为3.5～4.0;正交试验得到P204萃取除杂最佳工艺参数:有机相组成ψP204/ψ汽油为25％/75％,O/A相比1∶2,皂化率为75％.     

Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes

The purification of metallurgical-grade silicon (MG-Si) by combined solvent refining processes has been studied. The final high-purity silicon was recovered through Sn-Si refining and Al-Si refining processes in sequence after acid leaching, and the removal mechanism of impurities was explored. Inductively coupled plasma (ICP) chemical analysis revealed the concentrations of main impurities including B and P, and typical metallic impurities except for solvents Sn and Al were reduced to below 1 ppmw. The final removal efficiencies of B and P were 97.7 pct and 99.8 pct, respectively, and those of most metallic impurities were above 99.9 pct. SEM analysis showed that P-containing phases (Al-Ca-Mg-Si-P and Al-Si-P) formed on the surface of refined Si after Sn-Si refining and Al-Si refining, which was confirmed to be the main approach for P removal. It was also found that the formation of binary silicide such as Fe₃Si₇ and Mn₁₁Si₁₉ or multicomponent phases such as Ca-Mg-Si phase occurred during the solvent refining process, and they segregated on the grain boundaries in Si or attached to the surface of Si, which led to high removal efficiency of metallic impurities by the solvent refining process.     

钼精矿真空冶炼过程中主要杂质元素分布的研究

为提高钼精矿真空分解产品的质量,降低产品中Si、Ca、Mg、Al等杂质的含量,在冶炼过程中加入了碳粉。对钼精矿中主要杂质元素Si、Ca、Mg、Al在真空分解过程中的分布进行了研究。结果表明,在钼精矿中加入碳粉,有利于杂质SiO_2、Al_2O_3、MgO、CaO的去除。在研究的温度范围内,硅脱除率~100%,镁脱除率~99.7%,铝脱除率~78.44%,随着碳含量的增加及时间的延长,其脱除率可能会进一步提高。钙脱除率~9.8%。采用品位为48%的低品位钼精矿为原料,在加入碳粉真空冶炼的条件下,得到的金属钼中钼含量达到了92%,S含量降至0.69%,主要杂质SiO_2降至0.0021%,Cu0.005%,P0.005%,Mg降至0.001%,Al降至0.64%,Ca含量为0.51%。铁含量为4.44%,基本没有去除。