Method for treating low-grade zinc oxide ores by wet method
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A technology of zinc oxide ore and wet treatment, which is applied in the direction of photography technology, equipment, photography auxiliary technology, etc., can solve the problems of poor quality of zinc oxide zinc oxide, achieve the effect of improving filtration performance and avoiding a large amount of dissolution
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The ammonia method has the advantages of simple impurity removal process, short process, recyclable solvent, strong adaptability of raw materials, etc., but the quality of zinc oxide produced by this method is slightly worse than that produced by indirect method
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Embodiment 1
[0049] The low-grade zinc oxide ore in Nandan County, Guangxi is used, containing 15.03% zinc, 2.5% lead, 115g / t silver, and 67g / t germanium. High-grade zinc oxide ore is imported zinc oxide ore, containing 38.11% zinc, 5.76% lead, 103g / t germanium, and 41g / t indium. Zinc oxide ore is crushed and ball milled and put into the reaction tank together with zinc electrolytic waste liquid, leached with sulfuric acid with a concentration of 12-15%, the reaction temperature is 50~80°C, the final acid of leaching: 40~80g / L, the ore is controlled The liquid-solid ratio: 3~6:1, stirring reaction time: 60~100min. The leaching solution after the reaction is used for combined leaching, and the leaching residue is sent to the next step for slag washing. Put the high-grade zinc oxide ore into the reaction tank after the grinding treatment and the direct leaching output solution for leaching reaction. The initial acid of leaching: 40~80g / L, the stirring reaction time: 60~100min, and the final...
Embodiment 2
[0061] 1. Raw materials
[0062] The low-grade zinc oxide ore raw materials used come from local mines in Nandan, and the high-grade zinc oxide ore comes from imported Australian mines. The average composition of raw materials is shown in Table 1 and Table 2.
[0063] Table 1 Low-grade zinc oxide ore
[0064] element Zn Fe SiO2 Pb Sb Ag content(%) 15.03 31.6 28.2 2.5 0.5 115g / t
[0065] Table 2 High-grade zinc oxide materials
[0066] element Zn Fe SiO2 Pb In Ge content(%) 50.11 17.3 12.7 4.38 86g / t 157g / t
[0067] 2. Test indicators
[0068] 2.1 Direct leaching
[0069] 2.1.1 Leaching technical conditions
[0070]
[0071] 2.1.2 Components of direct leaching supernatant (g / l)
[0072] Zn Fe acidity Solid content 89 0.017 72 ≤1.5
[0073] 2.1.3 Direct leaching slag (%)
[0074] Zn Pb H2O 3.47 3.06 29
[0075] 2.1.4 Leaching rate: 88%, fil...
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Abstract
The invention discloses a method for treating low-grade zinc oxide ores with high iron content and large argillization degree by a wet method. The method comprises the following steps of: 1, leaching directly, namely crushing the zinc oxide ores, performing ball-milling, and putting the zinc oxide ores and zinc electrolytic effluent into a reaction tank for reacting, wherein a leachate obtained after reaction is used for joint leaching, and leaching slag is conveyed to be washed in the next step; 2, performing joint leaching, performing leaching reaction of high-grade zinc oxide ores and a solution obtained after direct leaching is performed, wherein a neutral solution is used for purification, and the leaching slag is conveyed to a rotary kiln; 3, washing the slag, namely putting the slag leached directly and a weak acid solution into a reaction tank, stirring, reacting, allowing the solution to return for leaching directly, conveying the washed leaching slag to a dressing plant and separating to recover valuable metals such as lead and silver; and 4, reducing and volatilizing in the rotary kiln, namely mixing the leaching slag and coat uniformly, putting the mixture into the kiln for reacting to obtain zinc oxide smoke for recovering indium germanium and kiln slag for recovering iron and residual coal. By the method, metal ore resources can be utilized effectively, so the method has the advantages of low production cost, high leaching rate of zinc, high comprehensive utilization of the valuable metals and the like, the original production equipment and production flow can be utilized, and industrialization is easy to realize.
Description
technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for wet treatment of low-grade zinc oxide ore. Background technique [0002] With the development of zinc smelting industry, zinc sulfide ore has become exhausted, and people pay more and more attention to the development and utilization of zinc oxide ore. According to the mass fraction (grade) of zinc oxide, 25% to 35% is rich ore, and less than 25% is low-grade zinc oxide ore. Zinc oxide ore resources are abundant in Southwest my country, and the zinc oxide minerals with industrial value include smithsonite ZnCO3, willemite Zn, SiO, hemimorphite zn2Si04(0H), hydrozincite 3Zn(OH) 2 · 2ZnCO 3 And zincite ZnO and so on. Zinc oxide ore contains a large amount of metal impurities, such as lead, iron, cadmium, copper, etc., and its mineral phase is very complex, it is difficult to separate, and the selection of flotation reagents and the modification of the miner...
Claims
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