Method for producing barium sulfate from combination-process industrial ammonium chloride solid waste

A technology of solid waste and barium sulfate, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of waste of barium resources, polluted surface water, environmental pollution, etc., and achieves the effect of eliminating the hidden danger of environmental pollution and improving the economic benefits of enterprises

Inactive Publication Date: 2014-02-05
HUBEI SHUANGHUAN SCIENCE AND TECHNOLOGY STOCK CO LTD
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Problems solved by technology

At present, there are two ways to deal with the combined refined ammonium solid waste - barium sulfate mud: one is to dig pits and bury them in remote places. Under acidic conditions such as acid rain, barium sulfate mud will produce a large amount o

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  • Method for producing barium sulfate from combination-process industrial ammonium chloride solid waste

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Embodiment Construction

[0013] Using combined refined ammonium solid waste—barium sulfate mud as raw material, two-stage washing with solvents such as dilute hydrochloric acid and process water, two-stage pressure filtration, drying and crushing, to produce precipitated barium sulfate, which includes the following steps:

[0014] (1) The barium sulfate mud and dilute hydrochloric acid solution (hydrochloric acid concentration ≤ 25%) produced by the combined method of refined ammonium are stirred and washed in the pickling tank, and then press-filtered; the filtrate is returned to the pickling tank for recycling, and the filtrate in the pickling tank When it is neutral (PH value 6.5-6.8), the pumping refined ammonium production system is used to configure barium chloride solution.

[0015] (2) The filter cake and process water in step (1) are stirred and washed in the washing tank, and then press-filtered; the filtrate is returned to the washing tank for recycling, and when the filtrate in the washing ...

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Abstract

The invention relates to a method for producing barium sulfate from combination-process industrial ammonium chloride solid waste. The method comprises the following steps: (1) stirring and washing the combination-process industrial ammonium chloride solid waste, namely barium sulfate mud and a dilute hydrochloric acid solution in a pickling tank, then filter-pressing, and feeding filtrate to an industrial ammonium chloride production system to prepare a barium chloride solution when filtrate is recycled to be neutral, wherein the hydrochloric acid concentration is smaller than or equal to 25%; (2) stirring and washing a filter cake in the step (1) and process water in a rinsing bath, then filter-pressing, and feeding filtrate to the pickling tank to wash the barium sulfate mud when the filtrate is recycled to weak acidity; (3) drying and crushing the filter cake in the step (2), so as to obtain a precipitated barium sulfate product. By adopting the method, barium resources can be fully utilized; precipitated barium sulfate is produced in an attached manner; the economic benefits of an enterprise are improved; meanwhile, the solid waste barium sulfate mud in combination-process industrial ammonium chloride production can be thoroughly removed; a hidden danger of environmental pollution is also removed.

Description

technical field [0001] The invention relates to the technical field of refined ammonium (industrial ammonium chloride) solid waste treatment, in particular to a method for producing barium sulfate by using combined refined ammonium solid waste. Background technique [0002] The new process of combined method of refined ammonium is to produce industrial ammonium chloride (refined ammonium) by two-stage washing method. The first stage is mixed washing, that is, the mixed washing of agricultural ammonium chloride and ammonia mother liquor Ⅰ in the production of combined alkali; the second stage is Circulation washing, that is, washing with circulating mother liquor, in order to reduce the sulfate radical (SO 4 2- ), constantly adding BaCl configured in the circulating mother liquor 2 The solution generates barium sulfate precipitation to remove the sulfate radical in the circulating mother liquor. Carbonate (CO 3 2- ), adding BaCl 2 After the solution, barium carbonate pr...

Claims

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Application Information

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IPC IPC(8): C01F11/46
Inventor 张立武
Owner HUBEI SHUANGHUAN SCIENCE AND TECHNOLOGY STOCK CO LTD
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