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Method for processing and utilizing electrolytic manganese waste residue

A technology of electrolytic manganese waste slag and pretreatment, applied in the direction of solid waste removal, etc., can solve the problems of reducing the utilization efficiency of manganese slag, achieve good economic benefits, low production cost, and easy operation

Inactive Publication Date: 2010-10-27
CHONGQING UNIV
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Problems solved by technology

Although in the above-mentioned treatment and utilization approach, the manganese element present in the electrolytic manganese waste residue in the form of manganese sulfate has been utilized, the useful substances such as ammonium sulfate present in the manganese residue have not been recovered, thereby reducing the manganese residue. usage efficiency

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  • Method for processing and utilizing electrolytic manganese waste residue

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Embodiment Construction

[0013] A method for processing and utilizing electrolytic manganese waste slag (refer to figure 1 ), the method includes the following steps.

[0014] a. Pretreatment of electrolytic manganese waste slag (washing): first dry the electrolytic manganese waste slag, grind, sieve, then mix the electrolytic manganese waste slag with water in a ratio of 1:5 to 8 according to the mass ratio, and stir at room temperature for at least After 60 minutes, stand still and press filter to obtain washing liquid and waste residue after washing—the waste residue is still used in building materials such as brick making and paving;

[0015] b. Manganese salt recovery: add ammonium carbonate in at least three batches to the above washing liquid, the molar ratio of the total amount of ammonium carbonate added to the manganese sulfate contained in the electrolytic manganese waste residue is 1.3:1; adjust the pH to 6.0-8.0 Finally, stir at room temperature for at least 50 minutes; then add floccula...

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Abstract

The invention relates to a method for processing and utilizing electrolytic manganese waste residue, which comprises the following steps of: the electrolytic manganese waste residue is washed so as toa water washing liquid; salvolatile and flocculating agent and polyacrylamide are added so as to obtain a manganous carbonate precipitation and a first filtrate; aluminium sulphate crystal and crystal modifier borax are added into the first filtrate so as to separate out dodecahydrate aluminium ammonium sulfate crystal. The method can convert manganous sulfate in the electrolytic manganese wasteresidue which is difficult to isolate a manganese element into the manganous sulfate which is convenient to isolate the manganese element, can convert the manganous sulfate which is difficult to isolate a nitrogen element into the dodecahydrate aluminium ammonium sulfate crystal which is convenient to isolate the nitrogen element. The method has the low manufacturing cost, is easy to operate and convenient for realizing the commercial process.

Description

technical field [0001] The invention relates to a method for processing and utilizing electrolytic manganese waste residue. Background technique [0002] Electrolytic manganese waste residue is the waste residue produced when manganese ore is used to manufacture manganese salt or metal manganese, that is, the waste residue obtained by pressure filtration and separation of manganese ore powder after sulfuric acid acid leaching, oxidation removal of aluminum / iron, and liquid ammonia neutralization. Its emissions are quite large. According to relevant statistical reports, at present, about 6-10 tons of waste residue will be produced for every ton of electrolytic manganese metal produced. The particles of these acid leaching waste residues are small and contain a certain amount of harmful elements. If they are allowed to be discharged, they will seriously pollute the environment; at the same time, electrolytic manganese production enterprises must requisition a large number of s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
Inventor 陶长元刘作华杜军李明艳刘仁龙孙大贵
Owner CHONGQING UNIV
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