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A Combined Smelting and Smelting Process for Comprehensive Recovery of Vanadium, Aluminum, Potassium and Silicon in Vanadium-bearing Silica Shale

A combination of siliceous shale, dressing and smelting technology, applied in the direction of process efficiency improvement, silicate, alkaline earth metal silicate, etc., can solve the problems of not considering the recovery of other elements, waste of resources, and not considering the recycling of metals, etc. problems, to achieve the effect of reducing the amount of roasting treatment, saving production costs, and solving the discharge of tailings

Active Publication Date: 2019-03-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcification roasting process generally only considers the recovery of vanadium, and does not consider the recovery and utilization of other metals in stone coal, such as silicon, potassium, aluminum and other elements, resulting in a waste of resources
At the same time, because it does not take into account the recovery of other elements, when it is calcified and roasted, the quality of CaO used is generally only 6-8% of the ore mass
[0004] So far, there is no relevant report on the comprehensive recovery of vanadium, aluminum, potassium, and silicon in vanadium-bearing siliceous shale.

Method used

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  • A Combined Smelting and Smelting Process for Comprehensive Recovery of Vanadium, Aluminum, Potassium and Silicon in Vanadium-bearing Silica Shale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The raw material is siliceous vanadium-containing rock from a certain place in Shaanxi, the color is earthy yellow, and the main content of each component is V 2 o 5 : 0.65%, SiO 2 : 68.28%, CaO: 1.02%, Al 2 o 3 : 18.76%, K 2 O: 1.58%, Na 2 O: 0.08%, MgO: 0.65%, TFe: 3.00%.

[0039] (1) First crush and grind the siliceous vanadium-containing shale to -200 mesh and account for 45% fineness to obtain the ore pulp to be selected. The slurry to be selected is subjected to rough separation three times and desiliconization by two sweeps to obtain vanadium concentrate and Gangue; the mixed collector of dodecylamine and octadecylamine used in flotation, the collector is added in a ratio of 55g per ton of ore; sodium hexametaphosphate and fluorosilicic acid are used in flotation A mixture of sodium; the dispersant is added at a rate of 250g per ton of ore. The pH of the pulp to be selected is 5.

[0040] (2) Measure the amount of alumina and silicon dioxide in the vanadi...

Embodiment 2

[0047] The raw material is siliceous vanadium-containing rock from a certain place in Hunan, the color is gray, and the main content of each component is V 2 o 5 : 0.87%, SiO 2 : 67.55%, CaO: 0.77%, Al 2 o 3 : 15.64%, K 2 O: 1.12%, Na 2 O: 0.15%, MgO: 0.54%, TFe: 2.11%.

[0048] (1) First crush and grind the siliceous vanadium-containing shale to -200 mesh and account for 49% fineness to obtain the ore pulp to be selected, which is subjected to secondary roughing and three times of desiliconization to obtain vanadium concentrate and Gangue; the collector used for flotation is ether amine, and the collector is added at a rate of 70g per ton of ore; the mixture used for flotation is sodium hexametaphosphate and sodium fluorosilicate; the dispersant is charged per ton The ore is added in a ratio of 400g. The pH of the pulp to be selected is 5.

[0049] (2) measure the amount of alumina and silicon dioxide in the vanadium concentrate obtained in step 1, according to the mo...

Embodiment 3

[0056] The raw material is siliceous vanadium-containing rock from a certain place in Sichuan, the color is white, and the main content of each component is V 2 o 5 : 0.98%, SiO 2 : 66.75%, CaO: 0.34%, Al 2 o 3 : 18.53%, K 2 O: 1.33%, Na 2 O: 0.26%, MgO: 0.49%, TFe: 1.67%.

[0057] (1) First crush and grind the siliceous vanadium-containing shale to -200 mesh and account for 55% fineness to obtain the ore pulp to be selected, which is subjected to secondary roughing and three times of desiliconization to obtain vanadium concentrate and Gangue; the collector used for flotation is a mixture of dodecyltrimethylammonium chloride and dodecylamine, and the collector is added in a ratio of 68g per ton of ore; the used for flotation is fluosilicic acid Sodium; dispersant is added at a rate of 300g per ton of ore. The pH of the pulp to be selected is 3.

[0058] (2) Measure the amount of alumina and silicon dioxide in the vanadium concentrate obtained in step one, according to ...

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Abstract

The invention relates to the field of beneficiation and metallurgy with a function of comprehensively recovering valuable components such as vanadium, aluminum, potassium and silicon from the vanadium-containing siliceous shale as a raw material. The process comprises steps as follows: the low-grade vanadium-containing siliceous shale is taken as the raw material, firstly, the vanadium-containingsiliceous shale is desiliconized with a flotation method, vanadium ore concentrate is uniformly mixed with excessive limestone and sodium carbonate, a mixture is subjected to high-temperature roastingin a rotary kiln, and products such as potassium aluminate, potassium ferrite, calcium metavanadate, calcium orthosilicate, carbon dioxide and the like are obtained; the sintered products are dissolved in a dilute alkaline solution, after a dissolution solution is desiliconized and purified, carbon dioxide gas produced by the rotary kiln is introduced into a closed container for carbonization reaction, Al(OH)3 precipitates are separated out, a dealumination solution is subjected to hydrolytic precipitation under the acidic condition, coarse vanadium is obtained and dissolved with alkali, ammonium chloride is added, ammonium metavanadate is obtained, a final solution is a potassium-rich and sodium-rich solution and evaporated step by step, and potash and soda are obtained. According to theinvention, the problem of environmental pollution produced by stockpiling of stone coal leaching residues is solved completely.

Description

technical field [0001] The invention relates to the mineral processing and metallurgy field of comprehensively recovering valuable components of vanadium, aluminum, potassium and silicon from low-grade vanadium-containing siliceous shale as raw material. technical background [0002] Vanadium-bearing siliceous shale, referred to as stone coal, is a unique vanadium-bearing resource in my country. The main vanadium-containing minerals in vanadium-bearing siliceous shale are vanadium-containing muscovite and vanadium mica, and the gangue minerals mainly include quartz, feldspar, and calcite. This type of vanadium ore is extremely rich in reserves in my country, and there are many valuable components in the ore, such as vanadium, aluminum, potassium, etc., which have high comprehensive utilization value and excellent development prospects. The ore is characterized by low vanadium grade and high content of quartz and calcite. The cost of extracting vanadium by traditional smelti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B3/12C22B3/44C22B34/22C22B21/00C22B26/10C01B33/24
CPCY02P10/20
Inventor 王丽孙伟胡岳华张庆鹏刘润清高建德张烨纪斌
Owner CENT SOUTH UNIV
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