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Process for processing, recycling and reusing chromic slag and waste water

A technology for chromium slag and waste water, which is applied to the improvement of process efficiency, multi-stage treatment of water/sewage, water/sludge/sewage treatment, etc. loss, etc.

Inactive Publication Date: 2012-10-03
唐翔
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  • Abstract
  • Description
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Problems solved by technology

[0009] 4. The process of this process is complicated and costly, and the purpose of harmless treatment of chromium slag cannot be achieved
[0010] Therefore, the currently used chromium slag treatment methods are operating at a loss, with high treatment costs and low treatment capacity, and the practical applicability of the chromium slag treatment technology is not high.

Method used

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Embodiment Construction

[0023] In order to perfect the invention technology, it becomes a scientific and technological productivity. On March 18, 2012, the chromium slag of the chromium salt enterprise Gansu Jinshi Chemical Co., Ltd. (the enterprise adopts the calcium-free roasting method to produce chromium salt) was processed three times according to the process flow, and the average value was obtained. show:

[0024] 1. All substances in chromium slag are extracted to produce a series of chemical products, and the comprehensive utilization rate is 99.0% (1% of which is ash powder). Calculated according to the products produced by processing 1 ton of chromium slag extracted substances, the finished product: Fe(OH) 3 220kg, Fe 2 o 3 310kg, Cr 2 o 3 、AI 2 o 3 and SiO 2 Mixture product 130kg, Mg(OH) 2 12kg, Cr(OH) 3 and AI(OH) 3 Mixture product 180kg, Na 2 SO 4 510kg.

[0025] 2. There is no secondary pollution in the whole process, and the treated wastewater is recycled and reused. There...

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PUM

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Abstract

The invention discloses a process for processing, recycling and reusing chromic slag and waste water; the chromic slag is dissolved by acid, and then hex-valent chromium specific treating agent is added so as to thoroughly remove chromic slag pollution and extract the substance from the chromic slag to directly make the substance into other substance series product. The 'three wastes' emissions and secondary pollution are avoided in the chromic slag processing process. The chromic slag processing capacity is high, the cost is low, the rate of multipurpose utilization is high; the product obtained by the chromic slag processing and recycling process is good in quality, high in value, and the demanded amount in market is large; in this way, the process has good economic benefit and social benefit and is cable of greatly prompting the development of circular economy.

Description

technical field [0001] The invention relates to a process for recycling and reusing chromium slag and waste water, which belongs to the technical field of extracting chemical substances from industrial chromium slag and waste water to directly produce industrial products, and is especially suitable for the treatment of chromium slag and waste water produced by chemical chromium salt enterprises. Background technique [0002] The treatment of chromium slag produced by chromium salt production enterprises is a worldwide problem, and both at home and abroad are committed to exploring new technologies and methods for chromium slag treatment. [0003] The original chromium slag treatment methods mainly adopt dry high-temperature detoxification and wet detoxification treatment, and these methods cannot directly extract substances from chromium slag to produce a series of products. [0004] Chromium slag dry high-temperature detoxification treatment method: one is kiln dry high-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C22B7/04C22B7/00C02F9/04
CPCY02P10/20
Inventor 唐翔
Owner 唐翔
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