Method for Improving Grade of Silver Concentrate Recovery by Flotation of Zinc Leach Slag
A technology of zinc leaching slag and silver concentrate, applied in flotation, solid separation and other directions, can solve the problems of waste of resources, loss, low grade of silver concentrate, etc., and achieve the effect of increasing the action time and reducing the loss.
Active Publication Date: 2016-09-28
HENAN YUGUANG ZINC IND
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Problems solved by technology
[0003] The existing system for recovering silver from zinc leaching slag by flotation, the average silver grade of the produced silver concentrate is 2000~2500g / t, the output (dry weight) is 20~25 tons per day, the grade of silver concentrate is low, and the daily loss The amount of zinc metal is about 5 tons, and there are also a lot of losses of other valuable metals, which is a serious waste of resources
Method used
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[0029] Such as figure 1 Shown, the method for improving zinc leach slag flotation recovery silver concentrate grade comprises the following steps:
[0030] Step 1), transport the acid leaching underflow from the zinc hydro-smelting leaching workshop to the thickener 1 in the silver flotation workshop, and the thickener 1 thickens the acid leaching underflow from the zinc hydro-smelting leaching workshop to produce Flotation raw ore;
[0031] Step 2), the flotation raw ore is continuously and stably transported to the raw ore high-level buffer tank 2 through the delivery pump, so as to ensure that the flotation raw ore entering the roughing flotation machine is stable and continuous, which is beneficial to flotation;
[0032] Step 3), the flotation raw ore in the raw ore high buffer tank 2 flows to the raw ore reagent mixing tank 3;
[0033] Step 4), add flotation reagents to raw ore reagent mixing tank 3, stir well, the flotation reagents are activated carbon, black medicine...
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The invention belongs to the field of metallurgy, in particular relates to a method for improving the grade of silver concentrate recovered through zinc leaching residue flotation in silver recovery through flotation from conventional zinc hydrometallurgy leaching residue. According to the method, activated charcoal, choosing black catching agent, Z-200, xanthate and No. 2 oil as flotation agents, adding a raw ore agents mixing agitation tank for agitating flotation raw ore and flotation agents, and enabling the flotation raw ore and the flotation agents to be mixed completely so as to improve the grade of silver concentrate recovered through zinc leaching residue flotation. The grade of silver concentrate produced through the method is improved from 2000-2500g / t to 5000-10000g / t, and the loss of zinc in silver content is reduced greatly.
Description
technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a method for improving the grade of silver concentrate recovered by flotation of zinc leaching slag, which is used for recovering silver by flotation from conventional zinc leaching slag. Background technique [0002] About 80% of the world's zinc is currently produced by wet methods. Most of the silver (0-300g / t) in the zinc concentrate is enriched in the zinc leaching slag (100-600g / tAg) after the roasting and leaching processes in the zinc hydrometallurgy process. Today, when resources are increasingly scarce and silver consumption is increasing day by day, recycling silver in zinc leaching slag is of great practical significance for rational utilization of the slag and increasing economic benefits of enterprises. [0003] The existing system for recovering silver from zinc leaching slag by flotation, the average silver grade of the produced silver concentrate is 200...
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IPC IPC(8): B03D1/018
Inventor 白四清姜仕发廉彩会赵波何意
Owner HENAN YUGUANG ZINC IND