Process for smelting zinc with wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling by two stages

A jarosite, high-temperature, high-acid technology is applied in the field of two-stage high-temperature, high-acid-low-pollution jarosite iron removal-jarosite slag pickling wet zinc smelting process, which can solve the problem of low metal recovery rate, two High zinc content in slag, low leaching rate and other problems, to achieve high metal recovery rate, lower acid content in slag, and high zinc leaching rate

Inactive Publication Date: 2011-06-15
BAIYIN NONFERROUS GROUP
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Problems solved by technology

[0006] The purpose of the present invention is to provide a two-stage high-temperature high-acid-low-pollution jarosite removal of iron-iron for the problems of low leaching rate, high zinc content in the two slags, and low metal recovery rate in the existing zinc hydrometallurgical process. Alum slag pickling wet zinc smelting process

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  • Process for smelting zinc with wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling by two stages
  • Process for smelting zinc with wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling by two stages

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Embodiment Construction

[0029] The second-stage high-temperature, high-acid-low-pollution jarosite iron removal-jaosite slag pickling wet zinc smelting process includes the following steps:

[0030] (1) Neutral leaching

[0031] The neutral leaching process is equipped with a head tank (oxidation tank), five leaching tanks connected in series and connected by an overflow tank, and two ￠21m thickeners.

[0032] Waste electrolyte, overflow of improved low-pollution jarosite separation thickener, manganese dioxide slurry, cadmium-poor solution, and anode slime are made into a uniform oxidation solution in the head tank. The oxidation solution is pumped to the first leaching tank, and quantitative calcined sand is added. A pH meter is installed at the overflow of the first leaching tank to automatically adjust the flow rate of the oxidizing solution. The pulp in the first leaching tank overflows into the second leaching tank, the zinc oxide in the calcined sand is completely dissolved, and the div...

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Abstract

The invention provides a process for smelting zinc with a wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling at two stages, belonging to the technical field of non-ferrous metal smelting. The process comprises the following steps of neutral leaching, acid leaching at the first stage, acid leaching at the second stage, pre-neutralizing, settling vitriol and pickling to obtain zinc metal with a high recovery rate. The total recovery rate of zinc metal is 94.45%. The loss of valuable metal in iron vitriol slag is less, the recovery rate of metal is high, and the pollution of vitriol slag to the environment is improved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and relates to a wet zinc smelting process, in particular to a two-stage high-temperature, high-acid-low-pollution jarosite iron removal-jaosite slag pickling wet zinc smelting process. [0002] Background technique [0003] Zinc production technology is divided into pyrometallurgy and hydrometallurgy. Currently 80% of zinc is produced by wet methods. The main methods of zinc hydrometallurgy include conventional leaching, hot acid leaching, pressure leaching of zinc concentrate, atmospheric pressure leaching of zinc concentrate, and direct leaching of zinc oxide ore. In the past, one of the main disadvantages of hydrometallurgy has been the low zinc recovery. At present, the zinc hydrometallurgy technology has been greatly developed, mainly in terms of improving the recovery rate and comprehensive utilization of raw materials, mechanization and automatic control of the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20C22B3/08
CPCY02P10/20
Inventor 张鸿烈杨斌张得秀柳忠宝马学强
Owner BAIYIN NONFERROUS GROUP
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