龙狮高岭土矿床地质特征及成矿过程简析

龙狮高岭土矿床属于花岗斑岩热液蚀变叠加风化残余型高岭土矿床。矿床矿体分砂质高岭土和硬质高岭土两种自然类型,属低铁高铝矿石。埋深越深,铝变低,钾钠变高,达到硬质高岭土后趋于稳定。成矿过程分两期,花岗斑岩的热液蚀变形成硬质高岭土矿,后生风化作用则形成砂质高岭土矿。     

朴鸠树高岭土矿地质特征及深部找矿前景

朴鸠树高岭土矿属细晶岩热液充填型叠加风化残积型高岭土矿床,矿床矿石分为地表风化残积型高岭土和深部硬质高岭土两种。深部矿体延伸稳定,矿石质量稳定,具有较好的深部找矿前景。     

龙上村高岭土矿地质特征及深部找矿前景

龙上村高岭土矿位于广东河源,是以高岭土为主的非金属矿床。矿体产于钠长石化细晶岩脉中。矿床矿石分为地表风化残积型高岭土和深部硬质高岭土两种。深部矿体延伸稳定,矿石质量稳定,具有较好的深部找矿前景。     

溶胶—凝胶法制备透明无机—有机纳米复合硬质薄膜

利用旋覆法通过溶胶－凝胶（Ｓｏｌ－ｇｅｌ）法在有机玻璃（ＰＭＭＡ）表面制备无机－有机硬质薄膜，产品具备致密、透明、耐擦伤等性能。纳米氧化物颗粒在体系中均匀分布，使硬度及耐擦伤性能较有机玻璃均有较大提高。     

全泥氰化—逆流洗涤—炭液法处理紫金山金矿矿石的工业试验

为探索较适合的选矿工艺,紫金山金矿炭浆石进行了全泥氰化－逆流洗涤－炭液法工艺的工业试验,由试验结果可知,全泥氰化－逆流洗涤－炭液法工艺较炭浸工艺更适合处理紫金山金矿含泥细粒级矿石,技术上是可行的,吨矿成本较浸工艺可减少１５．０６元。     

硬质粘土粉矿的压球煅烧

包钢硬质粘土粉矿和小粒矿(<30mm)因不能利用而舍弃。本文介绍了对被舍弃的硬质粘土粉矿和小粒矿进行压球煅烧的试验结果,对熟料球团的性能进行检测和分析。熟料球团的性能指标达到了部颁标准(吸水率除外),试验使用效果良好。     

炭在金浮选中的应用

本文介绍活性炭、煤焦炭、烟煤在金浸出矿浆，在含微粒金的氧化矿的吸附浮选中的应用及效果。吸附－浮选工艺用炭吸附，然后再将炭浮出成为最终产品，可以提高金精矿品位与回收率。     

加大浸出充气量 稳定金浸出率

加大浸出充气量稳定金浸出率刘志亮河北省张家口金矿１前言自引进炭浆法提金工艺对张家口金矿选矿工艺进行技术改造，于１９８７年５月完成投产后，选矿工艺由原来的混汞－浮选工艺变成为混汞－炭浆工艺，各项技术经济指标有了大幅度提高。但是自１９９３年６月起，浸渣品...     

含金烧渣采用炭浆法提金工艺的研究

本文主要论述了贵州省丹寨汞矿炼汞后的含金烧渣采用全泥氰化－炭浆法回收黄金铁试验研究。烧渣经氰化浸出后的矿浆采用炭吸附法，金的吸附率可达９９．９１％。     

高炉成渣带区域炉衬的选材探讨

本文介绍了高炉成渣带区域砖衬破损的机理和半石墨炭－－碳化硅砖具有良好的理化性能，其主要性能指标已达到国际先进水平。半石墨炭－－碳化硅砖是大中型高炉成渣带区域理想的炉衬材料。     

A study of the mechanisms of the salt catalyzed carbochlorination of kaolin

Continuous weighing of kaolin during carbochlorination has been used to show the superiority of NaCl as a catalyst for increasing the reaction rate and selectivity at 625° to 650 °C, and the possibility of using different types of carbon as a reductant. Initial distribution of NaCl in the kaolin was found to be of importance. A reaction mechanism involving the formation of NaAlCl₄ and alumina solubility in this salt is used to explain the effect of reactor configuration and kaolin particle geometry.     

超导磁选技术提纯高岭土试验研究

高岭土中的铁杂质严重影响高岭土产品品质,杂质中铁一般以磁铁矿、赤铁矿等弱磁性矿石为主.常规磁选机产生的场强不足,很难将高岭土中的弱磁性铁杂质分离出来.当采用磁场强度非常高的超导磁选机,能很好去除矿石中的各种弱磁性铁杂质,进而提高高岭土产品品质,提高企业的技术经济效益.试验研究表明,超导磁选高岭土中铁含量从1.04 %降至0.53 %,煅烧白度提高到85.6,可达到搪瓷工业TT-0级标准.      

含稀土高岭土精矿回收离子相稀土工艺研究

高岭土精矿具有粒度细、黏度大、渗透性能差、固液分离难、含铝高等特点,南方高岭土常伴有稀土,怎样从精矿中提取合格的稀土,目前国内外还没有一套成熟的工艺技术应用于工业生产上。依据高岭土矿中的稀土赋存特点,通过实验室小试、扩试和工业试验,探索出了一套成熟的工艺技术流程,把浸矿液与高岭土精矿加入到捣浆池中进行搅拌浸取,将矿浆通过板框压滤机压滤,得到的滤饼即是提取稀土后的高岭土精矿,滤液经后续处理即得到稀土产品。同时建成了生产线,已生产稀土10余t,为回收高岭土精矿中的离子型稀土提供了有效工艺。     

高岭土选矿除铁工艺研究现状

本文对高岭土中铁的赋存进行了简要阐述,并综述了高岭土选矿除铁工艺的研究及现状。在探讨了高岭土除铁工艺发展的基础上,认为采用多种除铁工艺相结合的方法,能获得更好的除铁效果。     

An Enhanced Study on Adsorption of Al(iii) onto Bentonite and Kaolin: Kinetics,Isotherms, and Mechanisms

In order to remove aluminum ions in bauxite processing wastewater, two natural clay minerals (bentonite and kaolin) were used as adsorbents. The adsorption behaviors including kinetics and isotherms were studied at much broader pH range, higher temperature, and higher Al(III) concentration by batch experiments. The adsorption mechanisms were investigated by optical microscope, zeta potential testing, and XRD analysis. The results show that Al(III) adsorption is strongly pH dependent and increases clearly with increasing pH. The pseudo-second-order kinetic model can best describe the adsorption process, and the intra-particle diffusion was not the sole rate-controlling step. The Langmuir–Freundlich model can fit best the adsorption equilibrium data, and the maximum capacities of Al(III) adsorbed on bentonite and kaolin reach to 8.52 mg g^–1 and 0.58 mg g^–1, respectively, at 35°C. Thermodynamic studies display that the adsorption of Al(III) onto clay minerals is non-spontaneous. The adsorption of Al(III) onto bentonite is endothermic and causes an increase in the entropy, while kaolin is exothermic and causes a decrease in the entropy. The interaction mechanisms of Al(III) with bentonite and kaolin involve electrostatic attraction, cation exchange, surface complex, and precipitation. Bentonite as adsorbent has more potential to remove Al(III) than kaolin.     

Effect of Soil Type on Electrokinetic Removal of Phenanthrene Using Surfactants and Cosolvents

Numerous sites have been contaminated with polycyclic aromatic hydrocarbons (PAHs), and these sites pose a significant risk to public health and the environment because PAHs are often toxic, mutagenic, and/or carcinogenic. Furthermore, these sites are often difficult or costly to remediate because PAHs are hydrophobic and highly resistant to degradation. The in situ flushing process using surfactants and/or cosolvents has shown great promise for sites possessing uniform and high-permeability soils, but it is generally ineffective for sites containing heterogeneous and/or low-permeability soils. Thus, for difficult soil conditions, electrokinetics can be integrated with the in situ flushing process to improve soil-solution-contaminant interaction. This investigation was conducted to evaluate the effects of two different low-permeability soils, kaolin and glacial till, on electrokinetically enhanced flushing. Each soil type was used in three bench-scale electrokinetic experiments, where each test employed a different flushing solution, deionized water, a surfactant, or a cosolvent. The results indicated that the contaminant was more strongly bound to the glacial till than the kaolin, and this was attributed to its higher-organic content. The glacial till also generated a greater electrical current and electro-osmotic flow, and this was probably a result of its higher-carbonate content and more diverse mineralogy. Based on the contaminant mass remaining in the soil, it was apparent that the surfactant or cosolvent solution caused contaminant desorption, solubilization, and/or migration in both soils, but additional research is required to improve PAH removal efficiency.     

广西北海市矿山地质特征及找矿潜力分析

针对广西北海市矿山矿产资源丰富,为此提出广西北海市矿山地质特征及找矿潜力分析。广西北海市矿产主要为岩体风化型高岭土,次为沉积型软质高岭土、石膏、钛铁砂矿、金等。其中,那车垌岩体风化型砂质高岭土已控制的矿石资源量多达8.42亿多吨,矿床储量居广西乃至全国首位。广西北海市矿山综合外部环境较好,经济效益明显,具有较好的找矿前景。     

Advances in Industrial Cryomagnetic Purification

Abstract

Most of the naturally occurring iron, titanium and chromium bearing minerals which accompany industrial minerals, such as quartz, feldspar, nepheline syenite, spodumene, andalusite, vermiculite, etc., exhibit either ferromagnetic or paramagnetic properties and can therefore be removed by means of magnetic treatment.

Magnetic separators powered by either permanent magnets or electromagnetic coils, have been widely applied to removing iron titanium and chromium bearing impurities from industrial minerals. The removal of these impurities have significantly improved the quality of the industrial minerals processed.

The early magnetic separators used for mineral processing were exclusively resistive electromagnets using water cooled copper coils. About 9 years ago, superconducting magnets made their first entry into this application and since that time their number and popularity has steadily increase.

Equally importantly the development of superconducting magnets systems has brought about notable improvements with regards to process economics, ease of installation and separation flexibility which make it practical for a great number of kaolin producers to benefit from this technology.

Dissolved metals from industrial effluents are usually precipitated as hydroxides or sulfurs. The precipitate is then decanted and filtered with the final cake stored in basins or lagoons. Magnetic separation (or magnetic filtration) can be used to decrease the separation time between mud and liquid. The conventional method consists of doping the mud with magnetic seeds (fine magnetite or hematite) which are incorporated in the preexisting flocculates.

A magnetic carrier can also be generated by coprecipitation of the element to be removed with ferric chloride, ferric nitrate or with a mixture of Fe^II /Fe^III.

Magnetic filtration is also greatly improved by the use of a superconducting magnetic separator.

This article describes a superconducting filtration prototype and presents the main results of magnetic purification obtained in mineral processing and with synthetic solutions of cadmium, zinc, iron, ? and industrial effluents.     

高岭土选矿除铁工艺研究现状

对高岭土中铁的赋存进行了简要阐述,综述了高岭土选矿除铁工艺的研究及现状.在探讨高岭土除铁工艺发展的基础上,认为采用多种除铁工艺相结合的方法,能获得更好的除铁效果.     

Chlorination kinetics of aluminum bearing minerals

The chlorination of domestic low-grade bauxite and kaolin clay was studied to determine the potential of these materials as sources of aluminum chloride for the chlorination/electrowinning route to aluminum metal. The reactivity of pure alumina was found to be representative of bauxite chlorination. Kaolin chlorinated in a complex manner at a much slower rate. Gamma alumina, which can be prepared, from bauxite or clay, offers the best potential for chlorination.