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A resource utilization method of chrome sludge precipitated by vanadium extraction wastewater treatment

A technology of water treatment and resource utilization, which is applied in the field of solid waste treatment and resource utilization, can solve the problems of lack of low-cost resource utilization methods, and achieve the effects of improving resource utilization efficiency, reducing environmental pollution, and shortening the process

Active Publication Date: 2019-05-14
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A resource utilization method of chrome sludge precipitated by vanadium extraction wastewater treatment
  • A resource utilization method of chrome sludge precipitated by vanadium extraction wastewater treatment

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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 chrome mud that 500g extracts vanadium waste water water treatment precipitation is placed in the muffle furnace high-temperature roasting, in the roasting process, sodium salt and vanadium remaining in the chrome 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 r...

Embodiment 3

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

[0043] (1) 1000g of vanadium extracting waste water treatment precipitated chrome sludge is placed in a muffle furnace for high-temperature roasting, during the roasting process, the sodium salt and vanadium remaining in the chromium sludge of vanadium extracting waste water undergo sodium roasting reaction again to obtain 230g of 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 prec...

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Abstract

A resource utilization method for chromium mud precipitated by vanadium extraction wastewater treatment belongs to the technical field of solid waste treatment and resource utilization. The method is as follows: (1) The chromium mud precipitated by the treatment of vanadium extraction wastewater is roasted at a high temperature of 400°C to 1000°C for 0.5 to 5 hours. During the roasting process, the sodium salt and vanadium remaining in the chromium mud of the vanadium extraction wastewater are sodiumified again. Roasting reaction to obtain a roasted product; (2) Add water 2 to 10 times the mass of the roasted product to the roasted product, stir and wash for 0.5 to 3 hours, and separate the solid and liquid. The washed roasted product is dark green chromium trioxide powder. body; (3) Add a binder to the dark green chromium trioxide powder, make blocks, and dry to obtain chromium trioxide particles with an effective particle size ≥3 mm; (4) Use the chromium trioxide particles as raw material to produce chromium-containing steel. This method recovers high value-added vanadium and chromium resources in chromium mud at a lower cost, thus producing obvious economic, social and environmental benefits.

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 Patents(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 LIAONING