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Method for preparing ceramsite from acidic vanadium extraction tailings

A technology for extracting vanadium tailings and acidity, which is applied in the field of preparation of ceramsite from acidic vanadium extraction tailings, which can solve the problems of complex composition of magnetite tailings, secondary pollution, and many organic components, and achieve good economic benefits and application Foreground, efficient recovery, simple operation effect

Active Publication Date: 2021-03-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many solid wastes often have acid residues and various valuable metal components. If they are directly used, not only will there be safety risks, but it will also cause waste of resources.
[0004] CN 102617097A discloses a non-fired ceramsite with vanadium extraction tailings from stone coal as the main raw material and its preparation method. The raw material components of the unfired ceramsite include tailings from stone coal vanadium extraction, fly ash, solid alkali Activator, cement, quicklime, gypsum and water, first mix the tailings of stone coal vanadium extraction and solid alkali activator, and grind to prepare a prefabricated material, then add the fly ash, cement, quicklime, Gypsum and water are stirred evenly to obtain a mixture, which is obtained by aging after pelletizing and autoclaving. However, this method does not carry out early recovery treatment of vanadium extraction tailings, etc., which may still cause pollution problems, and the raw materials Not all scrap, but multiple products, relatively high cost
[0005] CN 106673690A discloses a magnetite or vanadium-titanium magnetite tailings sand expanded ceramsite and a preparation method thereof. The preparation raw materials include magnetite tailings sand, domestic garbage, river sludge, sewage sludge, loess, and the magnetic The composition of iron ore tailings is complex, and the recovery of valuable components has not been carried out. Moreover, various raw materials contain many organic components, and the loss during the calcination process is large, which is easy to cause secondary pollution

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  • Method for preparing ceramsite from acidic vanadium extraction tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a method for preparing ceramsite from acidic vanadium extraction tailings, the process flow chart of the method is as follows figure 1 shown, including the following steps:

[0063] (1) Slurry leaching the acid tailings after vanadium extraction from the stone coal vanadium ore, the pH value of the acid tailings is 0.3, the temperature of the slurry leaching is 25° C., and the time is 3 hours, and the leaching solution and leaching residue are obtained by filtering;

[0064] (2) The leaching solution obtained in step (1) is subjected to adsorption treatment, the temperature of the adsorption treatment is 25° C., the adsorbent used is a cation exchange resin, and the adsorption completion liquid obtained after the adsorption treatment is returned for slurry leaching; the adsorbent completes the adsorption Afterwards, use a concentration of 0.02mol·L -1 The NaOH solution is used for desorption, the adsorbent after desorption is recycled, and the ...

Embodiment 2

[0069] This embodiment provides a method for preparing ceramsite from acidic vanadium extraction tailings, said method comprising the following steps:

[0070] (1) Slurry leaching the acid tailings after vanadium extraction from the stone coal vanadium ore, the pH value of the acid tailings is 1.5, the temperature of the slurry leaching is 45° C., and the time is 4 hours, and the leaching solution and leaching residue are obtained by filtering;

[0071] (2) The leaching solution obtained in step (1) is subjected to adsorption treatment, the temperature of the adsorption treatment is 35° C., the adsorbent used is a cation exchange resin, and the adsorption completion liquid obtained after the adsorption treatment is returned for slurry leaching; the adsorbent completes the adsorption Afterwards, use a concentration of 0.03mol·L -1 The KOH solution is used for desorption, the adsorbent after desorption is recycled, and the solution after desorption is used to prepare vanadium pr...

Embodiment 3

[0076] This embodiment provides a method for preparing ceramsite from acidic vanadium extraction tailings, said method comprising the following steps:

[0077] (1) Slurry leaching the acid tailings after vanadium extraction from the stone coal vanadium ore, the pH value of the acid tailings is 2.8, the temperature of slurry leaching is 55° C., and the time is 6 hours, and the leachate and leaching residue are obtained by filtering;

[0078] (2) The leaching solution obtained in step (1) is subjected to adsorption treatment, the temperature of the adsorption treatment is 45° C., the adsorbent used is a chelating resin, and the adsorption completion liquid obtained after the adsorption treatment is returned for slurry leaching; the adsorbent completes the adsorption Afterwards, use a concentration of 0.05mol·L -1 The ammonia solution is desorbed, the desorbed adsorbent is recycled, and the desorbed solution is used to prepare vanadium products;

[0079] (3) Perform 5-stage coun...

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Abstract

The invention provides a method for preparing ceramsite from acidic vanadium extraction tailings, and the method comprises the following steps of: carrying out slurrying leaching and liquid-solid separation on the acidic vanadium extraction tailings to obtain a leaching solution and leaching residue, and carrying out adsorption treatment on the obtained leaching solution; and washing and neutralizing the leaching residue, mixing the obtained neutralized residue with auxiliary materials, and conducting granulating and roasting to obtain a ceramsite product. According to the method, high-efficiency recovery of valuable metal vanadium is realized through slurrying leaching of the acidic vanadium extraction tailings and adsorption; the leaching residue is washed and neutralized and then prepared into ceramsite together with the auxiliary materials, so that harmlessness and recycling of various solid wastes are realized; the method is simple to operate and low in cost, the technological process is clean and environmentally friendly, and good economic benefits and application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization, and relates to a method for preparing ceramsite from acidic vanadium extraction tailings. Background technique [0002] Vanadium is an important strategic metal, which is widely used in chemical industry, metallurgy, aerospace, battery and other industries in the form of metal, alloy or compound. At present, vanadium-containing ores are mainly vanadium-titanium magnetite. In addition, vanadium-uranium ore, bauxite, phosphate rock, carbonaceous shale, petroleum combustion ash, and spent catalysts can all be used as resources for recovering vanadium. Because the grade of vanadium is generally low, the production of vanadium products will produce a large amount of acidic vanadium-containing waste residue. For example, 1 ton of vanadium pentoxide product produced by stone coal vanadium ore will produce 100-150 tons of acidic vanadium extraction tailings. At present, most Vanadium ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B33/132C04B33/135C22B7/00C22B3/04C22B34/22C22B3/24
CPCC04B33/138C04B33/1322C04B33/1352C04B33/1324C04B33/132C22B7/006C22B34/22C22B3/24C04B2235/3217C04B2235/3272C04B2235/3208C04B2235/3206C04B2235/3201C04B2235/3218C04B2235/442C04B2235/77Y02P10/20Y02P40/60
Inventor 裴丽丽董玉明刘宏辉宋春光张红玲徐红彬
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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