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System for producing chromium salt series products by sodium, carbon and heat circulation system

A series of products and heat technology, applied in the direction of chromate/dichromate, chromium oxide/hydrate, electrolytic components, etc., can solve the problem that the products cannot be combined together, and the chromate products cannot be cleaned and recycled. Production and other issues to achieve the effect of enhancing competitiveness and sustainable development potential, contributing to sustainable development and reducing production costs

Inactive Publication Date: 2018-06-01
SICHUAN YINHE CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process is limited to the production of red alum and sodium products and resource recycling, but it cannot combine the full range of mainstream chromium salt products, and fails to realize the thorough cleanliness and resourceful production of chromium salt products

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  • System for producing chromium salt series products by sodium, carbon and heat circulation system

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0023] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0024] figure 1 Show a kind of sodium of the present invention, carbon, the system that heat cycle system produces chromium salt series product, comprises:

[0025] A sodium chromate production subsystem, which includes: an oxidation reactor, an oxidizing liquid flash evaporator, and an oxidizing liquid solid-liquid separator connected in sequence through a delivery pipeline; the liquid phase outlet of the oxidizing liquid solid-liquid separator is connected to chromic acid The sodium solution storage tank, the solid phase outlet is connected to the iron oxide powder drying devi...

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Abstract

The invention discloses a system for producing chromium salt series products by a sodium, carbon and heat circulation system. The system comprises a sodium chromate production subsystem, a sodium bichromate production subsystem, a chromium oxide production subsystem and a crystalline chromic anhydride production subsystem. According to the system, raw materials ferrochromium are fed, part of sodium salt is supplemented, and the four subsystems are arranged, therefore, chromium series main products including sodium chromate, sodium bichromate, chromium oxide and crystalline chromic anhydride are obtained, and heat produced in exothermic reaction of the four subsystems is supplied to material concentration and drying of the whole system; circulation use of carbon and sodium in the subsystemsis realized on the basis of carbon dioxide and sodium carbonate as supports, so that real closed-cycle type green ecological production mode of chromium salt industry is realized by the whole systemfor producing the chromium salt series products by the sodium, carbon and heat circulation system.

Description

technical field [0001] The invention belongs to the field of preparation of chromium salt chemical series products, in particular to a system for producing chromium salt series products with a sodium, carbon and heat circulation system. production of liquid or solid products. Background technique [0002] As an important strategic metal resource in the world, chromium products occupy an important position in modern material manufacturing, national defense and civil use. They are widely used and are listed as one of the eight most competitive resource raw materials. According to statistics, chromium products are closely related to 10% of the national economy's industrial products. Chromium salt series products mainly include sodium chromate, sodium red alum, chromic anhydride, chromium trioxide, etc. During the production of chromium salt series products, a large amount of toxic wastes such as chromium slag and Glauber’s salt are produced in the traditional production proces...

Claims

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Application Information

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IPC IPC(8): C01G37/14C01G37/02C25B1/22C25B9/08C25B9/19
CPCC25B1/22C01G37/02C01G37/14C25B9/19
Inventor 陈宁董明甫李逢彬黄先东
Owner SICHUAN YINHE CHEM
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