Clean environment-friendly production technique of chromic oxide

A chromium trioxide, clean and environmentally friendly technology, applied in the direction of chromium trioxide, chromium oxide/hydrate, etc., can solve problems such as difficult industrialization, low efficiency, and environmental pollution, and achieve easy industrial scale production, improved production efficiency, and economical benefit-enhancing effect
CN102642869AInactive Publication Date: 2012-08-22HUNAN LIANZHI METALLURGY NEW MATERIAL
4 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN LIANZHI METALLURGY NEW MATERIAL
Publication Date
2012-08-22
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a clean environment-friendly production technique of chromic oxide. The invention mainly solves the technical problem that the existing production technique has a great impact on the environment, can not implement industrial production due to the immature production technique, or the like. The technical scheme is as follows: the technique comprises the following steps: mixing the main raw material carbon ferrochrome powder and the auxiliary material metal oxide powder, compacting, drying, carrying out a solid-solid metallurgical process at 500-1500 DEG C to convert chrome in the carbon ferrochrome into chromic oxide, cooling to obtain powder, and separating to obtain the chromic oxide. The invention solves the problem of environment pollution due to sexavalent chrome and calcium chromate in the prior art; and the production technique is simple, has obvious social benefit, can easily implement industrial large-scale production, greatly enhances the production efficiency, and obviously enhances the economic benefit.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a production process of metal chromium and chromium salt, in particular to a production process of chromium trioxide. Background technique

[0002] At present, the process of producing sodium chromate from chromite is the same in the front process of the joint production process of metal chromium and chromium salt, but the latter process is different. The post-process of the metal chromium system is mainly trivalent chromium, while the chromium salt system is all hexavalent chromium. If Cr is brought into the chromium salt system in the process, it will bring great difficulties to the production. The crystal color is deep, and the Glauber's salt is fine, black and sticky, which cannot be washed and dried. What's more, it will make it difficult to carry out normal production. Another example is "Research on the New Process of Producing Metal Chromium (Chromium Salt) with Ferrochrome" published in "Ferroalloy" (page 35-38, Issue...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More