Shu Ming Wen

Efficient Utilization of Copper Sulfide Ore in Chile by Flotation

The valuable minerals of a copper sulfide ore in Chile, mainly consist of chalcopyrite and chalcocite as well as contain small amounts of cuprite. Gangue minerals are mainly chlorite, quartz, calcite, arsenopyrite, etc. Most are coarse-grained disseminated minerals, while some are fine-grained disseminated minerals. Flotation has been used for processing these ores. The grinding fineness, lime dosage, collector type and dosage all have influences on flotation results. In the present work, the best condition of grinding fineness, lime, and collector dosage was used to separate the copper sulfide and other minerals in the ores. The results showed that, in the grinding fineness of −74 μm accounting for 80%, the vast majority of copper minerals were to monomer dissociation. The flowsheet of one stage roughing, two stage scavenging, and two stage cleaning was adopted. The ideal results of 27.58% and 96.89% for the copper concentrate grade and copper recovery, respectively, were obtained.

Theoretical Calculation of Dissolution Equilibrium for Cerussite in Pulp Solution

The dissolution equilibrium of cerussite within the entire pH range was theoretically calculated, which was based on coordination chemistry, thermodynamics and the mass balance principle of Pb2+ and CO32- in pulp solution. The calculation result showed that the total lead concentration (CPbT) of cerussite decreased significantly with increasing pH below 6 or so; however, at pH of about 10, a reverse trend of CPbT may be observed. Within the pH range from 6 to 10, the CPbT of cerussite remained close and presents a minimum value of around 10-4 mol/L. This paper may provide a theoretical basis for the dissolution process of cerussite and its conditioning stage before benefication by adopting flotation method.

Effect of Rod Arrangement in Matrix on High Gradient Magnetic Separation Performance

The effect of rod arrangement in a rod matrix on high gradient magnetic separation (HGMS) performance has been comparatively investigated through a cyclic pilot-scale centrifugal HGMS separator, with contiguously and orthogonally arranged rod matrixes respectively. The results of investigation indicate that the arrangement of rod elements in the matrix has a distinct effect on the HGMS performance, for relatively low magnetic inductions; beyond the threshold magnetic induction, the magnetic induction dominates that of the arrangement and the importance of the arrangement is significantly weakened even vanished. It was thus concluded that the combinatorial optimization for magnetic elements in the matrix improves the collision efficiency of particles with matrix, and gives a superior performance in a HGMS separator, at a lower energizing consumption.

Experimental Study on Floatation of Scheelite Ore of Jiangxi

In this study, according to the characteristics of scheelite in run-of-mine, the scheelite was concentrated by adopting the full flotation process with sodium carbonate as regulator agent, sodium silicate as inhibitor for gangue minerals, lead nitrate as activator and ZL pharmacy as collector. 6.15% of the coarse scheelite concentration with tungsten recovery of 96.18% was obtained from the raw ores with grade of 0.86%. The concentration of rough tungsten by heating, by which the high-quality scheelite with tungsten of 62.31% and tungsten concentrate recovery of 93.53% was obtained.

The Progress of Mineral Processing Technology of Lead-Zinc Mine in China

This paper discusses the progress of lead-zinc mineral processing technology and flotation reagents of China, and proposes that optimize technological process and develop new reagents are the main directions.

Beneficiation Experiment Study on Iron Ore in Yunnan Province

In order to provide essential information for enterprises to exploit the iron ore of Yunnan province in China, properties of the ore were analyzed. Experiments of the best grinding fineness analysis and magnetic separation current were conducted. The result show that the ore is martite; when the grinding fineness content below 74um is 95%, and magnetic separation current is 10A (0.8T), iron concentrate with a grade of 65.40% and a recovery of 90.49% can be obtained. Sulfur and phosphorus content in the iron concentrate is 0.057% and 0.011%, respectively.

Experimental Study on Improving the Rate of Antimony Ore Grade and Recovery of Mineral Processing

In order to improve the grade and recovery of antimony, antimony ore in the process of flotation, this exploratory experiment by reagent addition, process selection to realize. The main parameters of the first set of experiments; grinding fineness of 70% lead nitrate, 200g, Black Powder 100g, directly add collector, did not add kerosene decarburization, choose a coarse, two sweep, two fine flotation process; and the second group of experiments the main parameters; grinding fineness of 70% 200g, lead nitrate, xanthene’s, the choice of a coarse, two sweep, two fine flotation process. The combination of two different groups of flotation experiment comparison, makes the antimony ore grade and recovery can be increased.

Recovery Copper from a Complex Copper Sulfide Ore of Yunnan by Using Flotation

Copper ore is the main mineral for the large deposits. Copper minerals are mostly consisting of chalcopyrite, secondly consisting of bornite, there are traces of processing copper blue and malachite, the mineral is disseminated by coarse granularity. This mineral is easy to processing. Production process was using by the process of grinding-flotation. After grinding fineness, lime dosage, sodium sulfide dosage, collector and frother dosage, were determined by the open test. Closed circuit experiment was conducted by those optimal conditions identified in the above test, the recovery of copper concentrate is 88.38% and the grade of copper concentrate is 14.37%.

Experimental investigation on flotation of refractory copper oxidized ore

To improve the recovery of copper from refractory copper oxidized ore by sulfidization-flotation process. The result determined the optimal flotation process parameters of refractory copper oxidized ore, and the better quota selecting separately obtained by a large number of research. The copper concentrate grade reaches 10.85%, the recovery reaches 57.41%.

Mining Engineering Professionals Motivated to Improve their Proficiency in English

The industrialization is progressing on the unparalleled scale, bringing an ever greater impetus to the growth of mining industry. China has had its unique pattern of developing its mining engineerin: firstly importing technologies, then studying and absorbing them, and finally achieving some innovation. Until now, China has been honored with some of mining theories taking the lead in the international mining world. As the disseminators of human civilization including advanced mining technologies, the Chinese professionals concerned are duty-bound to introduce abroad Chinas new progresses in mining engineering; that they are skillfully equipped with the four kinds of English abilities in reading, writing, listening and speaking, which is prerequisite for them to work well in foreign cooperation, has become an urgent matter to for them as well as for the authorities concerned.