Integral leaching detoxication and landfill treatment method of chromium slag

A treatment method, chromium slag technology, applied in the direction of solid waste removal, etc., can solve the problems of slow progress, unsatisfactory treatment effect, high treatment cost, etc., and achieve the effect of eliminating environmental pollution

Inactive Publication Date: 2012-10-31
LIAONING SING HORN GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have failed to realize the resource utilization of chromium in chromium slag, and the treatment cost is high, the progress is slow and the treatment effect is not ideal.

Method used

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  • Integral leaching detoxication and landfill treatment method of chromium slag
  • Integral leaching detoxication and landfill treatment method of chromium slag
  • Integral leaching detoxication and landfill treatment method of chromium slag

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Embodiment Construction

[0025] specific implementation

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, the present invention provides a kind of chromium slag leaching detoxification and landfill integrated processing method, wherein, comprises the following steps:

[0028] 1) Construct a detoxification pool on the ground: excavate a landfill pool of a corresponding size on the ground according to the amount of chromium slag to be treated, set an anti-seepage layer on the wall of the landfill pool, and set an outward diversion tank in the landfill pool diversion system;

[0029] 2) Transporting the chromium slag to be treated to the detoxification pool, and adding water to the detoxification pool, the chromium slag leaches hexavalent chromium and / or combines hexavalent chromium in the water, and the water added at this time becomes the leachate;

[0030] 3) Recover the leaching solution through the div...

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Abstract

The invention discloses an integral leaching detoxication and landfill treatment method of chromium slag. The method comprises the steps of: 1) creating a detoxication pool on the ground: arranging an impermeable layer on the wall surface of a landfill pool, and arranging a flow guide system for guiding the flow outwards in the detoxication pool; 2) conveying the chromium slag to be treated in the detoxication pool, adding water in the detoxication pool, enabling the chromium slag to leach out hexavalent chromium and/or compound hexavalent chromium in the water, and the added water becomes lixivium; 3) recycling the lixivium through the flow guide system, adding water in the detoxication pool to perform circular percolation until the chromium slag is soaked for 5 months, adding alkali sulfide in the detoxication pool to reduce the hexavalent chromium if the content of the hexavalent chromium in the lixivium is not larger than 0.5-1g/L, and executing the detoxication reaction; and 4) burying and closing the detoxication pool after the detoxication treatment. The method disclosed by the invention treats the chromium slag through the integral leaching detoxication and landfill treatment technology, so that the method is an efficient chromium slag treatment having no secondary pollution and capable of really recycling the chromium resource.

Description

technical field [0001] The invention relates to a treatment method for chromium slag, in particular to a treatment method which can eliminate the toxicity of chromium slag and utilize hexavalent chromium in chromium slag after detoxification and landfilling. Background technique [0002] Chromium slag is a toxic waste slag discharged during the production process of chromium salt and ferroalloy industries. Hexavalent chromium (Cr(VI)) in chromium slag is listed as one of the eight most harmful chemical substances to the human body, and is an internationally recognized three It is one of the carcinogenic metals and one of the 129 key pollutants recognized by the US EPA. Foreign developed countries mainly start from the reform of chromium salt production process, reduce the amount of slag discharge and the residual chromium in slag, or adopt the method of solidification and safe disposal to landfill. However, since my country began to produce chromium salts in 1958, it has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B1/00
Inventor 董达王德纯柳卓刘顺朱守国王宝良张志祥
Owner LIAONING SING HORN GROUP CO LTD
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