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Harmless and comprehensive utilization method for vanadium-extraction liquid leached residue

A harmless, water immersion technology, applied in chemical instruments and methods, inorganic chemistry, phosphorus compounds, etc., can solve the problems of high energy consumption, re-recycling, etc.

Inactive Publication Date: 2012-07-04
HUAIHUA HONGFA RESOURCE COMPREHENSIVE UTILIZATIONTECH
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Problems solved by technology

[0009] However, the above-mentioned method of making bricks with stone coal slag has high energy consumption, and the valuable elements such as vanadium in the slag are not recovered again before making bricks, so there is a defect in the comprehensive utilization of resources

Method used

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Embodiment Construction

[0028] A method for harmless and comprehensive utilization of vanadium extraction water leaching slag, comprising the following steps:

[0029] 1. Inorganic acid leaching

[0030] The acidic leaching of vanadium extraction water leaching residue adopts tank leaching or heap leaching. During tank leaching, let the dilute acid solution with a concentration of 0.5-5% submerge the vanadium extraction water leaching slag placed in the tank, and release it every 10-24 hours to test the vanadium content of the leaching solution. The leachate with low vanadium content is returned to the tank for leaching, and the leachate with vanadium content that meets the concentration requirements is put into the finished product pool.

[0031] During heap leaching, the dilute acid of the above concentration is evenly sprayed on the ore heap through the spray system, and the leachate slowly passes through the ore heap and penetrates into the water leaching slag pellets and powder to make the aci...

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Abstract

The invention relates to a harmless and comprehensive utilization method for vanadium-extraction liquid leached residue (in particular, low-sodium roasted vanadium-extraction liquid leached residue). The method is characterized by comprising the following steps of: taking the vanadium-extraction liquid leached residue as a raw material, extracting the valuable elements, such as vanadium, aluminum, ferrum, phosphorus and the like by carrying out a series of treatments, such as acid leaching, ion exchange, stripping liquid purification, ammonium polyvanadate precipitation, ammonium polyvanadate pyrolysis, and aluminum-ferrum-phosphorus precipitation for a solution obtained after carrying out ion exchange, wherein the liquid leached residue can be harmless and can have chemical stability; and then, mixing the chemical stability with a limestone crushed material and cement, grinding, moistening by using water, then, briquetting, stripping and carrying out natural curing to form a baking-free brick which meets the requirements of the GB6566-2001 on decorative materials.

Description

technical field [0001] The invention relates to a harmless and comprehensive utilization method for vanadium extraction water leaching slag. Background technique [0002] Taking Huaihua City, Hunan Province as an example, there are currently 34 stone coal vanadium extraction plants in Huaihua City, more than 90% of which use low-sodium salt roasting method to produce vanadium pentoxide. About 1 million to 1.5 million tons of vanadium extraction solid waste will be produced every year, and the city needs to provide a valley storage capacity of 900,000 to 1.36 million cubic meters every year, making the lush valley a daunting tailings dam. Taking Wanfa Vanadium Industry Co., Ltd. and Xinhongda Vanadium Industry Co., Ltd. located in Chuanxi Township, Chenxi County as an example, since the content of vanadium pentoxide in the raw material stone coal is only 1.2-1.4%, the amount of leached slag is roughly the same as The amount of ingredients is comparable. During the productio...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B3/06C22B3/42C22B3/46C04B28/00C04B18/14C01B25/45C01F7/76C01G45/02C01G49/00C22B34/22
CPCY02P10/20Y02W30/91
Inventor 赵秦生舒德来
Owner HUAIHUA HONGFA RESOURCE COMPREHENSIVE UTILIZATIONTECH
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