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Starting process of wet zinc-making system

A technology of hydrometallurgy and start-up method, which is applied in the direction of photographic process, instrument, photographic auxiliary process, etc., which can solve the problems of large gap between drive-up flow and design flow, high financial cost and start-up cost, and long start-up cycle time, etc., to achieve The driving time is short, which is conducive to the control of the driving process and the effect of fast product

Inactive Publication Date: 2008-07-30
HENAN YUGUANG ZINC IND
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Problems solved by technology

This method is limited by the dilution heat of sulfuric acid and water and the heat of reaction between sulfuric acid and zinc calcine, the start-up cycle time is long, and the difference between the start-up flow rate and the design flow rate is large, making it difficult to control the system, which is not conducive to production control after start-up
At the same time, the longer the start-up cycle of a new enterprise, the higher the financial cost and start-up cost

Method used

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  • Starting process of wet zinc-making system
  • Starting process of wet zinc-making system

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Embodiment Construction

[0011] exist figure 1 In the leaching system 3, dilute sulfuric acid solution is first prepared with sulfuric acid 1 and water 2, and zinc calcined sand 4 from zinc concentrate treatment is added to produce a zinc sulfate solution containing zinc (called supernatant 5) , because the heat of reaction between sulfuric acid 1 and water 2 and the heat of reaction between sulfuric acid 1 and zinc calcined sand 4 are relatively large, the concentration of dilute sulfuric acid solution should not be too high at one time. Zinc extraction (to increase the concentration of zinc ions), according to the conditions of each system, it generally takes 3 to 4 cycles to complete the zinc extraction task of the hydrometallurgy zinc smelting system, and produce a qualified zinc sulfate solution containing zinc (supernatant 5). Sent to the clean liquid system 6, and then sent to the electrolysis system 7 after being processed by the clean liquid system 6, the product zinc ingots 8 and waste liqui...

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Abstract

The starting process of new wet zinc-making system includes: compounding dilute water solution of sulfuric acid solution of concentration 150-250 g / l in the electrolytic system while dissipating the dilution heat of sulfuric acid with the cooling device of the electrolytic system, feeding the dilute solution to the waste liquid storage tank, pumping the dilute solution to the leaching tank in the leaching system to produce leaching reaction with zinc calcine to obtain zinc sulfate solution, purifying the zinc sulfate solution in the purifying system, electrolysis in the electrolysis system to produce zinc ingot and waste liquid, and returning the waste liquid to the leaching system to complete cycle and starting. The starting process has the advantages of short time, easy control and low cost.

Description

technical field [0001] The invention relates to a start-up method for a new wet zinc smelting system. Background technique [0002] At present, newly-built zinc hydrometallurgy enterprises start-up mostly use sulfuric acid in the leaching process industry to directly produce liquid, cyclically extract zinc, produce qualified new liquid and send it to electrolysis production, and send leaching to leaching after the waste liquid produced in electrolysis production. This method is limited by the dilution heat of sulfuric acid and water and the heat of reaction between sulfuric acid and zinc calcine, the start-up cycle time is long, and the difference between the start-up flow and the design flow is large, which makes it difficult to control the system and is not conducive to production control after start-up. At the same time, the longer the start-up period for a new enterprise, the higher the financial cost and start-up cost. Contents of the invention [0003] In order to o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C25C1/16
CPCY02P10/20
Inventor 刘西峰姜士发倪恒发
Owner HENAN YUGUANG ZINC IND
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