Method for treating arsenic in nonferrous smelting waste acid by jarosite slag collaborated by carbide slag

Abstract

The invention relates to a method for treating arsenic in nonferrous smelting waste acid by jarosite slag collaborated by carbide slag, belonging to the technical field of heavy metal pollution control. In the invention, the jarosite slag and the carbide slag are uniformly mixed, and ball milling is carried out until the particle size of the mixture is not more than 0.56 mu m to obtain mixed slag powder; the mixed slag powder and potassium permanganate are added into the nonferrous smelting waste acid to mix evenly, air is continuously introduced under the stirring condition, and oxidation dearsenization reaction is performed for 24 to 36 hours to obtain a solid-liquid mixture; the solid-liquid mixture is subjected to solid-liquid separation to obtain an arsenic-containing solid matter and filtrate, the arsenic-containing solid matter is stacked and treated, and the filtrate enters the next step of deep arsenic removal treatment. In the invention, the jarosite slag and the carbide slag are adopted to remove arsenic in the nonferrous smelting waste acid, so that the arsenic removal effect is excellent, the process operation is simple, the production cost is low, the amount of sludge generated after arsenic removal is small, and the problem of large sludge stockpiling is relieved.

Description

technical field [0001] The invention relates to a method for treating arsenic in non-ferrous smelting sewage acid with jarosite slag and calcium carbide slag, and belongs to the technical field of heavy metal pollution control. Background technique [0002] The jarosite method was developed in the 1960s after years of experimental research at the Reston Electric Zinc Plant of the Australian Electric Zinc Company, and is widely used in zinc smelting. my country is a big country of zinc production and consumption. More than 50% of the zinc smelters use the jarosite method to remove iron. This method will produce a large amount of jarosite slag in the process of smelting zinc. The annual slag production is about the zinc output half of. These waste residues are generally stored directly without proper treatment, causing great harm to the surrounding environment. The main elements of jarosite slag are Fe, S, and Zn, and it also contains As, Cd, Ga, In, and other elements, and t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the treatment method of polluted acid, the vulcanization method-lime iron salt method is widely used at present. Although this method has simple process and low disposal cost, its harmless disposal is not complete in practical application, and the amount of secondary hazardous waste residue Big

A large amount of difficult-to-handle and difficult-to-storage waste residues are stored in the environment, which not only easily releases toxic elements to pollute the environment, but also causes high hardness of the treated water, making it difficult to recycle, and the disposal cost of waste residues is expensive

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