Iron depositing method of high acid and high iron solution goethite during zinc hydrometallurgy

A technology for hydrometallurgy of zinc and goethite, applied in the direction of improvement of process efficiency, etc., can solve the problems of high zinc content, impact on iron resource utilization, low iron grade, etc., and achieve improved leaching rate, simple operation, and high iron slag grade high effect
CN102010994AInactive Publication Date: 2011-04-13ZHUZHOU SMELTER GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHUZHOU SMELTER GRP
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides an iron depositing method of high acid and high iron solution goethite during zinc hydrometallurgy, comprising the following steps: a) carrying through oxidization leaching for zinc concentrate ore by using a sulphuric acid contained solution; b) reducing the leaching liquid by the zinc concentrated ore; c) pre-neutralizing the reduced liquid until pH value is 1.5-2.5, and generating a supernatant and a base flow via solid and liquid separation; d) carrying through goethite iron depositing for the generated supernatant, wherein after iron is deposited, liquid and solid are separated; the overflow is returned into a purification process; a part of the base flow is returned to a first iron depositing reactor as a seed crystal, and the rest base flow is discharged outwardly. The method provided by the present invention, iron is deposited in a form of goethite by using a high acid and high iron solution generated during zinc refining procedure; the grade of iron slag is high; and emissions of waste residues, waste gas and waste water are not increased.
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Description

technical field

[0001] The invention relates to the field of metal smelting, in particular to a method for precipitating iron from goethite in a high-acid and high-iron solution in a zinc hydrometallurgy process. Background technique

[0002] Since the 1970s, zinc hydrometallurgy technology has developed rapidly. Compared with zinc pyrometallurgy, zinc hydrometallurgy has the advantages of good working conditions, environmental protection, easy continuous production, automation, large-scale, and convenient comprehensive recycling. Used in new smelters.

[0003] In the traditional zinc hydrometallurgy process, zinc concentrate needs to be boiled and roasted to obtain zinc calcine and sulfur dioxide flue gas. Although the flue gas after dust collection is used for acid production, the tail gas after acid production still contains a certain amount of sulfur dioxide. , causing air pollution. With the continuous development of zinc hydrometallurgy technology, the direct leachin...

Claims

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