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151 The leaching of cobalt and arsenic was carried out under direct oxidization with Thiobacillus ferrooxidans.

152 Different methods of microbial comprehensive bioleaching are used to increase the leaching rate of chalcopyrite.

153 This contamination of groundwater and soil through landfills is known as leaching.

154 Scientific method of heap construction is an important guarantee and key link for massive mechanized gold extraction by heap leaching process.

155 The main chemical reactions of low grad zinc oxide ore in leaching process were investigated. It was thought that the reaction to zinc sulphate can occur.

156 Aimed at the feature of pumping lixivium with submersible pump in in-situ leaching mine, the electro vehicle carried device for lifting submersible pump is developed.

157 Vugular pore openings are frequently as large as an ordinary lead pencil and are usually attributed to leaching of the rock subsequent to deposition.

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158 DTP transported by leaching from different treatment plots varied from 4.0 g · hm - 2 to 7.5 g · hm - 2.

159 The results showed that gold recoveries could be increased by fine grinding of concentrates , raising concentration of sodium cyanide in leaching solution and adding the regent SDM.

160 The leaching-rate of cobalt can reach as high as 99. 7% by using phosphoric acid and ozogen as leaching solution under the conditions of normal temperature and vibration.

161 Synthetic samples were prepared and studied to simulate the phase changes of iron—cobalt compounds in the reduction roasting—ammoniacal leaching processing of oxidized ore.

162 It is concluded that, in comparison with FIF, DIF significantly decreased the leaching loss of urea-N from soil, and increased the available N in soil.

163 The process of dump bioleaching of secondary copper sulfide as chalcocite and covelite includes two stages, in the first stage, the leaching speed is faster than that in the second stage.

164 Intracutaneous injection of the leaching solution in rabbits did not induce obvious skin stimulation manifested by intradermal erythema or edema.

165 After microcrack treatment, their leaching rate can be notably increased with decrease of the content of freely soluble copper and removal of flotation reagent on mineral surfaces.

166 Shortening the heap leaching cycle period is conducive to the raising of the heap leaching rate so the output of the factory will be raised and better economic benefit obtained.

167 The function of ultra fine grinding and alkali leaching is investigated, and the mechanochemistry mechanism of accelerating pyrite decomposition is discussed.

168 Along with the attentions on the resource of Bastnaesite and environmental safety by our country, it is important to establish the clean leaching technique of Bastnaesite.

169 In order to promote current efficiency and decrease energy consumption in electro-oxidation process for molybdenite concentrate, ultrasonic wave was introduced to intensify the leaching process.

170 This paper makes a thermodynamic analysis on acid leaching process of germanium oxide dust and discusses the behaviours of mainly substances of the dust on leaching process.

171 At the same time, NH4Cl roasting method possesses selectivity to chlorinating Fe so the Fe content in leaching solution is very low. It is advantageous to recover RE in subsequent purification.

172 Jarosite process was selected for iron removal due to the characteristics of the solution originated from the reduction leaching of manganese nodules by pyrite in chloride system.

173 The deep oxidation and groundwater leaching solubilizes much of the loosely bound uranium.

174 A mathematic model for oxidation leaching of sulphide ore developed.

175 In this paper, author discussed the new methods about technology of sonochemistry to accelerate Ferric chloride leaching chalcopyrite, through different factors experiment.

176 Test results showed that use of ammoniacal solution pretreatment can effectively remove copper, and thus alleviating negative effect of copper on leaching of gold.

177 This paper deals with the effect of leaching liquor of Conyza canadensis on seed germination and seedling growth of three crops including wheat, rape and cabbage.

178 By chemical dispersion and acid leaching, silica nanowires were prepared from natural mineral chrysotile.

179 The process of preparing manganese from rhodochrosite by acid—leaching is studied and the optimum leaching condition is obtained.

180 County, the county also built on gold smelter, the formation of mining, heap leaching, smelting stop.