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Resource utilization method for chrome sludge of vanadium extraction waste water treatment sediment

A water treatment and resource utilization technology, applied in the field of solid waste treatment and resource utilization, can solve the problem of lack of low-cost resource utilization methods, and achieve the effect of improving resource utilization efficiency, short process and cost saving

Active Publication Date: 2018-09-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of low-cost, low-pollution resource utilization methods

Method used

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  • Resource utilization method for chrome sludge of vanadium extraction waste water treatment sediment
  • Resource utilization method for chrome sludge of vanadium extraction waste water treatment sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for resource utilization of chrome sludge precipitated by vanadium extraction wastewater treatment, comprising the following steps:

[0030] (1) 250g of vanadium extracting wastewater water treatment precipitated chromium sludge is placed in a muffle furnace for high-temperature roasting, during the roasting process, sodium salt and vanadium remaining in the chromium sludge of vanadium extracting wastewater undergo sodium roasting reaction again to obtain 53g of chromium sludge Roasted product, wherein, Cr in the roasted product 2 o 3 Content 66wt.%; Among them, the high-temperature calcination temperature is 1000 ℃, and the high-temperature calcination time is 2 hours;

[0031] (2) the roasted product is placed in a beaker, water is added, stirred and washed at normal temperature, and the solid-liquid separation obtains the roasted product after washing liquid and washing, and the mass concentration of vanadium in the washing liquid is C V =1.69g / L, reuse af...

Embodiment 2

[0036] A method for resource utilization of chrome sludge precipitated by vanadium extraction wastewater treatment, comprising the following steps:

[0037] (1) the chromium mud that 500g extracts vanadium waste water water treatment precipitation is placed in muffle furnace high-temperature roasting, during roasting, sodium salt and vanadium remaining in the chromium mud of vanadium extracting waste water take place sodiumization roasting reaction again, obtain 110g Roasted product, wherein, Cr in the roasted product 2 o 3 Content 63.1wt.%; Among them, the high-temperature calcination temperature is 800 ℃, and the high-temperature calcination time is 2 hours;

[0038] (2) The roasted product is placed in a beaker, water is added, stirred and washed at 80° C., solid-liquid separation is obtained to obtain the washing liquid and the roasted product after washing, and the mass concentration of vanadium in the washing liquid is C V =1.66g / L, reuse after treatment, the roasted p...

Embodiment 3

[0042] A method for resource utilization of chrome sludge precipitated by vanadium extraction wastewater treatment, comprising the following steps:

[0043] (1) The chrome mud that 1000g extracts vanadium waste water treatment precipitation is placed in muffle furnace high-temperature roasting, during roasting, sodium salt and vanadium remaining in the chrome mud of vanadium extracting waste water take place sodium roasting reaction again, obtain 230g Roasted product, wherein, Cr in the roasted product 2 o 3 Content 62.5wt.%; Among them, the high-temperature calcination temperature is 1000 ℃, and the high-temperature calcination time is 0.5h;

[0044](2) The roasted product is placed in a beaker, water is added, stirred and washed at 100° C., solid-liquid separation is obtained to obtain the washing liquid and the roasted product after washing, and the mass concentration of vanadium in the washing liquid is C V =1.63g / L, return to the vanadium precipitation process after tre...

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Abstract

The invention provides a resource utilization method for chrome sludge of vanadium extraction waste water treatment sediment and belongs to the technical field of solid waste treatment and resource utilization. The method includes the steps that (1) the chrome sludge of the vanadium extraction waste water treatment sediment is roasted at a high temperature of 400-1000 DEG C for 0.5-5 h, sodium salt and vanadium remaining in the chrome sludge of vanadium extraction waste water generate a sodium salt roasting reaction again in the roasting process, and a roasted product is obtained; (2) water which is 2-10 times the mass of the roasted product is added into the roasted product, stirring washing is carried out for 0.5-3 h, solid and liquid separation is conducted, and the roasted product obtained after washing is deep green chromium sesquioxide powder; (3) a binding agent is added into the deep green chromium sesquioxide powder, briquetting and drying are carried out, and chromium sesquioxide particles with the effective grain size being larger than or equal to 3 mm are obtained; and (4) chromium containing steel is produced by taking the chromium sesquioxide particles as raw materials. According to the method, high value-added vanadium and chromium resources in the chromium sludge are recycled at low cost, so that remarkable economic benefits, social benefits and environmental benefits are generated.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and in particular relates to a method for resource utilization of chromium sludge precipitated by vanadium extraction wastewater treatment. Background technique [0002] Vanadium is known as the metal "vitamin", and is widely used in metallurgy, chemical industry and other industries, as an alloy additive and a catalyst in organic chemical industry. At present, the production process of its main product vanadium pentoxide is mostly sodium roasting process. The main process of this process is: vanadium slag crushing-sodium roasting-water leaching vanadium extraction-leaching solution purification-acid ammonium salt vanadium-melting decomposition, and finally Obtained flake vanadium pentoxide. This process produces a large amount of highly polluted acidic vanadium extraction wastewater containing a large amount of heavy metals, and the total chromium, hexaval...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B34/32C22B34/22
CPCC22B1/02C22B7/001C22B34/22C22B34/32
Inventor 薛向新方得安苗威程功金滕艾均杨松陶
Owner NORTHEASTERN UNIV
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