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Method for preparing calcium chloride by using waste stone powder and waste diluted hydrochloric acid

A technology of waste stone powder and calcium chloride, which is applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve the problems of stone powder reuse and waste of resources, etc., to alleviate environmental pressure , solve direct emissions and reduce energy consumption

Inactive Publication Date: 2017-05-31
伊犁南岗化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing calcium chloride by using waste stone powder and waste dilute hydrochloric acid, so as to solve the waste of resources proposed in the above-mentioned background technology, and the problem that the reuse of stone powder cannot be effectively solved

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  • Method for preparing calcium chloride by using waste stone powder and waste diluted hydrochloric acid

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Embodiment 1

[0021] A method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid, including raw material preparation, filtration, decolorization treatment, product crystallization and drying treatment steps, the method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid is specific Proceed as follows:

[0022] S1: Preparation of raw materials: Add waste stone powder to waste dilute hydrochloric acid solution, and keep stirring until completely dissolved to form a mixed solution, add a regulator to the mixed solution to adjust the pH value of the mixed solution to 8, so that iron and magnesium impurities form hydrogen Oxides are then precipitated out, and the regulator is milk of lime, and in the process of adding the regulator, continuous stirring is required so that the regulator is completely fused in the mixed solution;

[0023] S2: Filtration: filter the mixed solution in a filter device to obtain a bro...

Embodiment 2

[0028] A method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid, including raw material preparation, filtration, decolorization treatment, product crystallization and drying treatment steps, the method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid is specific Proceed as follows:

[0029] S1: Raw material preparation: Add waste stone powder to waste dilute hydrochloric acid solution, and keep stirring until completely dissolved to form a mixed solution, add a regulator to the mixed solution to adjust the pH value of the mixed solution to 9, so that iron and magnesium impurities form hydrogen Oxides are then precipitated out, and the regulator is milk of lime, and in the process of adding the regulator, continuous stirring is required so that the regulator is completely fused in the mixed solution;

[0030] S2: Filtration: filter the mixed solution in a filter device to obtain a brownis...

Embodiment 3

[0035] A method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid, including raw material preparation, filtration, decolorization treatment, product crystallization and drying treatment steps, the method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid is specific Proceed as follows:

[0036] S1: Raw material preparation: Add waste stone powder to waste dilute hydrochloric acid solution, and keep stirring until it is completely dissolved to form a mixed solution. Add a regulator to the mixed solution to adjust the pH value of the mixed solution to 8.5, so that iron and magnesium impurities form hydrogen Oxides are then precipitated out, and the regulator is milk of lime, and in the process of adding the regulator, continuous stirring is required so that the regulator is completely fused in the mixed solution;

[0037] S2: Filtration: filter the mixed solution in a filter device to obtain a...

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Abstract

The invention discloses a method for preparing calcium chloride by using waste stone powder and waste diluted hydrochloric acid, belonging to the technical fields of resource recycling comprehensive utilization and building material environmental protection. The method comprises the steps of preparing raw materials, filtering, carrying out decoloring treatment, carrying out product crystallization and carrying out drying treatment. The method for preparing the calcium chloride by using the waste stone powder and the waste diluted hydrochloric acid concretely comprises the following steps: S1, preparing raw materials; S2, filtering; S3, carrying out decoloring treatment; S4, carrying out product crystallization; S5 carrying out drying treatment. The method adopts the waste stone powder and the waste diluted hydrochloric acid as the raw materials, so that energy consumption is reduced, the problem of direct discharge of waste acid liquor is solved, the environmental stress is relieved, and the environmental pollution is avoided; the prepared calcium chloride is high in content and short in preparation period; therefore, the method is suitable for centralized manufacturing of a factory and increases the economic benefit.

Description

technical field [0001] The invention relates to the technical field of resource recycling and comprehensive utilization and environmental protection of building materials, in particular to a method for preparing calcium chloride by using waste stone powder and waste dilute hydrochloric acid. Background technique [0002] In today's world, energy, resources and environmental protection have always been the central issues of the chlor-alkali industry. In order to accelerate the development of the chlor-alkali industry, it is not only necessary to rely on advanced technology, but also to reproduce the existing technology, improve methods, expand channels, reduce production costs, reduce energy consumption, and finally realize the improvement of economic benefits. [0003] Stone powder is the stone powder produced by stone processing factories in the process of producing stone. Because it cannot be properly treated, a large amount of stone powder is piled up and buried, which no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/24
CPCC01F11/24
Inventor 吴佩阮新民顾建家王保杰李昌建解德君
Owner 伊犁南岗化工有限责任公司