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Method for extracting vanadium pentoxide from Stone-like coal vanadium ore and special device for the same

An extraction and mineral powder technology, applied in the field of extracting vanadium pentoxide, can solve the problems of low extraction rate, low yield and low conversion rate of stone coal vanadium ore, so as to accelerate the oxidative conversion speed and conversion rate, and improve the oxidation rate. Conversion rate, the effect of improving acid-dissolving ability

Inactive Publication Date: 2007-10-17
古丈大盈矿业有限公司
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  • Abstract
  • Description
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Problems solved by technology

The traditional method of extracting vanadium from stone coal, such as the sodium method (also known as sodium salt roasting and sodium vanadate water immersion method), has defects such as low yield and polluting the environment, and its use is limited
At present, people use blank roasting, calcification roasting, intermediate salt method and other methods to solve the environmental pollution caused by chlorine gas and hydrogen chloride gas in the process of vanadium extraction from stone coal, but the conversion rate is not high, SO 2 Difficulty in the treatment of pollution and ammonia nitrogen-containing wastewater, insufficient process automation, low yield, etc., it is difficult to promote the use in actual production
For example, Chinese invention patent application 200610031913.5 discloses a method for extracting vanadium pentoxide from stone coal vanadium ore. The process uses slaked lime as a sulfur fixation agent and NH 3 -N wastewater absorbent to reduce SO 2 and NH 3 -N waste water pollution, but the extraction rate of stone coal vanadium ore is not high, and the three wastes (waste gas, waste water and waste residue) in the vanadium extraction process of stone coal vanadium ore have not been comprehensively treated and recycled.

Method used

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  • Method for extracting vanadium pentoxide from Stone-like coal vanadium ore and special device for the same
  • Method for extracting vanadium pentoxide from Stone-like coal vanadium ore and special device for the same
  • Method for extracting vanadium pentoxide from Stone-like coal vanadium ore and special device for the same

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Experimental program
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Effect test

Embodiment 1

[0045] Example 1 Extraction and preparation of vanadium pentoxide

[0046] The extraction and preparation of high-purity vanadium pentoxide by adopting a method for extracting vanadium by fluidized bed oxidation transition acid leaching comprises the following steps:

[0047] 1. Stone coal mine 6940kg (of which the vanadium content is 0.545%, equivalent to V 2 o 5 The average content is 0.97%). After column milling, sieve the mineral powder with a particle size of -60 mesh, wherein the mineral powder with a particle size of -200 mesh is not less than 30%;

[0048] 2. After the ore powder is introduced into the fluidized bed from the feed port, it enters the high-temperature oxidation zone at 900°C after preheating at 600°C. The high-temperature oxidation zone is equipped with multiple steps. After cooling in the cooling zone, it enters the receiving bin from the discharge port to obtain slag powder after oxidation transformation treatment. The leaching rate is 78%, which is ...

Embodiment 2

[0066] Example 2 Fluidized bed conversion acid leaching extraction method for extracting vanadium

[0067] Stone coal vanadium ore 6940kg (0.46% vanadium content is equivalent to V 2 o 5 Average content is 0.82%), and preparation method is with embodiment 1.

[0068] See Table 1 for the proportions of vanadium in different valence states in stone coal mines before and after fluidized bed oxidation transformation treatment. The recovery rate is 69%, which is 61% higher than the leaching rate without fluidized bed oxidation treatment. The total direct recovery rate is 60.16%, the total recovery rate is 63.78%, and the purity of the obtained vanadium pentoxide is 99.35%. See Table 2 for other test results.

Embodiment 3

[0069] Embodiment 3 Preparation of vanadium pentoxide

[0070] Stone coal vanadium ore 6940kg (wherein vanadium content 0.48%), preparation method is the same as embodiment 1, the test result of gained vanadium pentoxide product is referring to table 2.

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Abstract

The present invention relates to a process for extracting vanadic anhydride from a stone coal and its special-purpose equipments. By utilizing ebullated bed conversion type acid dip extraction vanadium abstraction process, the present invention improves extraction yield of vanadium and quality of vanadic anhydride, and at the same time, actively controls three wastes, effectively promotes cycling and reutilization of three wastes and reaction by-products, is characterized by its high product quality, low primary materials consumption, low energy consumption, high yield, environmental protection, economy and omni-process automation and the like, and possesses pronounced economic benefit and social benefit compared with the existing vanadium extraction technic.

Description

technical field [0001] The invention relates to a method for extracting vanadium pentoxide from stone coal vanadium ore and special equipment thereof. Background technique [0002] Vanadium is a rare metal with a high melting point and has many excellent properties. It is an important industrial raw material and is widely used in metallurgy, chemical industry and other industries. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing, but my country's vanadium ore resources are scattered and of low grade, mainly including vanadium-titanium magnetite symbiotic with iron and titanium, and symbiotic with carbon stone coal vanadium ore. It is said that the vanadium reserves in my country's current stone coal vanadium mines are almost equivalent to the vanadium reserves of other vanadium-containing minerals that have been identified in the world, that is, the vanadium reserves of China's stone coal vanadium mines are com...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/06C22B3/26C22B1/14C22B3/08C22B3/20C22B3/44
CPCY02P10/20
Inventor 江祥民付京龙陆正军王胜同
Owner 古丈大盈矿业有限公司
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