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Method for extracting vanadium by using vanadium-containing stone coal power generation ash with sensible heat and low energy consumption

A low energy consumption, vanadium ore technology, applied in the field of nonferrous metallurgy, can solve the problems of energy waste, slag sensible heat waste, direct utilization without mentioning, etc., and achieve the effect of reducing energy consumption and simple process

Inactive Publication Date: 2013-09-11
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the slag coming out of the fluidized fluidized furnace is generally around 800°C. In the prior art, in order to crush the stone coal slag and leaching it with acid or alkali, the slag needs to be cooled by a slag cooling machine, so that the inherent sensible heat of the slag is wasted and cannot The temperature of the soot is still above 200°C after the dust collection treatment. The above-mentioned existing technologies for extracting vanadium from stone coal power generation ash do not mention the direct use of its inherent sensible heat, resulting in energy waste and increased grinding. fine process steps

Method used

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  • Method for extracting vanadium by using vanadium-containing stone coal power generation ash with sensible heat and low energy consumption

Examples

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Effect test

Embodiment 1

[0035] Place 100 kg of overflow slag with a temperature above 200°C and a particle size of about 60 mesh and a temperature of about 800°C and a particle size below 8 mm in a closed reaction vessel at a ratio of about 30:100, and add 30 kg of concentrated sulfuric acid. Soak and ripen for 2 hours, then add water and stir for leaching. The leaching residue was filtered, washed, dried, and sent for sample analysis. The leaching rate of vanadium pentoxide in the slag was 43.7%.

Embodiment 2

[0037]Place 100 kg of overflow slag with a temperature above 200°C and a particle size of about 60 mesh and a temperature of about 800°C and a particle size below 8 mm in a closed reaction vessel at a ratio of about 50:100, and add 50 kg of concentrated sulfuric acid. Soak and ripen for 3 hours, then add water and stir for leaching. The leaching residue was filtered, washed, dried, and sent for sample analysis. The leaching rate of vanadium pentoxide based on the slag was 60.7%.

Embodiment 3

[0039] Place 100 kg of overflow slag with a temperature above 200°C and a particle size of about 60 mesh and a temperature of about 800°C and a particle size below 8 mm in a closed reaction vessel at a ratio of about 50:100, and add 50 kg of concentrated sulfuric acid. Soak and ripen for 10 hours, then spray water for leaching. The leaching residue was filtered, washed, dried, and sent for sample analysis. The leaching rate of vanadium pentoxide in the slag was 70.7%.

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Abstract

The invention discloses a method for extracting vanadium by using vanadium-containing stone coal power generation ash with sensible heat and low energy consumption. Through controlling the granularity of vanadium-containing stone coal to be below 8mm in advance, vanadium is directly leached from stone coal ash after being used for combustion power generation by adopting a method of similar dump leaching of concentrated sulfuric acid without being cooled, crushed and ground. According to the method, the sensible heat of the vanadium-containing stone coal power generation ash is fully utilized, the process is simplified, the energy consumption is reduced, and carbon and vanadium resources of the stone coal are comprehensively utilized.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, in particular to a method for extracting vanadium by using vanadium-containing stone coal. Background technique [0002] At present, the raw material for producing vanadium pentoxide is mainly the vanadium slag produced in the smelting process of vanadium-titanium magnetite. my country's vanadium-titanium magnetite is mainly concentrated in Panzhihua, Sichuan and Chengde, Hebei. In addition to vanadium-titanium magnetite deposits in my country, there are also huge vanadium-containing stone coal resources, and stone coal is also a unique vanadium resource in my country. It is estimated that the total reserves of vanadium in my country's stone coal are nearly 200 million tons (in V 2 o 5 Calculated), about 2.7 times the total vanadium reserves in vanadium-titanium magnetite, exceeding the sum of vanadium reserves in other countries in the world. With the development of my cou...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B7/00
CPCY02P10/20
Inventor 蒋训雄范艳青张登高汪胜东冯林永蒋伟刘巍赵磊
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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