Closed cycle preparation new process of zinc sulfate and zinc oxide

A closed-circuit cycle, zinc sulfate technology, applied in the direction of zinc sulfate, zinc oxide/zinc hydroxide, etc., can solve the problems of large water consumption, environmental protection, waste liquid discharge, etc., achieve water balance, eliminate pollution, and reduce production costs Effect

Active Publication Date: 2017-05-31
宁夏京成天宝科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

Both have the problems of waste liquid discharge, large water consumption per unit product, and environmental protection.

Method used

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Embodiment Construction

[0017] The specific embodiment of the present invention is as follows.

[0018] A new closed-loop preparation process of zinc sulfate and zinc oxide. The main production process of this process is divided into liquid preparation, product preparation, and waste liquid treatment processes.

[0019] 1. Liquid preparation system process: This process consists of medium acid leaching, oxidative iron removal of leachate, oxidative manganese removal, and replacement impurity removal processes. The medium acid leaching refers to medium acid leaching with sulfuric acid. The medium acid leaching solution is filtered, the filtrate is oxidized to remove iron and manganese by oxidation, and the zinc powder is replaced once and twice to replace impurity elements such as copper and cadmium, and finally a qualified zinc sulfate solution is obtained.

[0020] 2. Product preparation system process: It is composed of zinc sulfate preparation sub-system process and zinc oxide preparation sub-sys...

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PUM

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Abstract

The invention discloses a closed cycle preparation new process of zinc sulfate and zinc oxide, and belongs to the field of chemical engineering. The new process comprise a liquid preparing system procedure, a product preparation system procedure and a waste liquid treatment system procedure, wherein the liquid preparing system procedure is composed of the procedures of medium-acid leaching, oxidation for iron removal and oxidation for manganese removal of leaching agent, and replacement for impurity removal; the product preparation system procedure is composed of a preparation subsystem of zinc sulfate and a preparation subsystem of zinc oxide; the waste liquid treatment system procedure is composed of treatment procedures of generated waste liquid such as zinc sulfate separated mother liquid produced in the preparation sub-system of the zinc sulfate, an ammonium sulfate or sodium sulfate solution and basic zinc carbonate cleaning liquid produced in the preparation sub-system of the zinc oxide. The original production lines of singly producing the zinc sulfate and the zinc oxide are integrated and transformed into a closed cycle production system, the wastewater zero discharge is realized, the vicious circle of pollution-treatment-secondary pollution is avoided; the production of three-waste is controlled from the source so as to prevent the environment pollution, and the production cost is lowered, and the economic benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a new closed-loop preparation process of zinc sulfate and zinc oxide. Background technique [0002] Zinc sulfate is a needle-like or powdery white or yellow crystal, which is produced by reacting zinc-containing raw materials with sulfuric acid. It is easily soluble in water and acid, and easy to absorb moisture and agglomerate. Wide range of uses, mainly used in medicine-emetic, industry-mining, feed-additive, agriculture-zinc supplement, food and other industries. Zinc oxide is white powder or hexagonal crystal, hardly soluble in water, soluble in acid and strong alkali, odorless and tasteless, turns yellow when heated, and returns to white after cooling. Widely used in plastics, rubber, paint, food and other industries. [0003] At present, the production of zinc sulfate solution generally adopts the sulfuric acid method, and its technological process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01G9/06
CPCC01G9/02C01G9/06
Inventor 季群
Owner 宁夏京成天宝科技有限公司
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