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A comprehensive utilization method of vanadium-containing stone coal

A vanadium stone and vanadium-based technology, applied in the field of comprehensive utilization of vanadium-containing stone coal, can solve the problem of unutilized carbon resources, achieve the effects of saving high-quality coal resources, improving utilization rate, and reducing emissions

Active Publication Date: 2019-01-04
湖北华威斯新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, vanadium-containing stone coal is mainly used as raw material for extracting vanadium pentoxide: add certain additives and adopt various roasting methods for oxidative roasting, slag is extracted by water leaching or dilute acid leaching, and vanadium pentoxide is extracted by conventional vanadium extraction process. The carbon resources in vanadium are not utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the preparation method of vanadium-based coal gasification catalyst

[0038] Bituminous coal gasification:

[0039] Blank control, raw material test results, volatile matter 31.09%, fixed carbon 52.73%, ash content 16.18%, calorific value: 6144 kcal, pulverize the above-mentioned bituminous coal to 80 mesh, add briquette binder 2% pressure ball for later use, at φ0 .8m single-stage gasifier for gasification.

[0040] 1. Conventional gasification of air + steam

[0041] a. Control the gas outlet temperature at 250°C and add coal 30kg / time

[0042] b. Furnace temperature is controlled at 950°C-1050°C

[0043] If the furnace temperature is lower than 950°C, turn the ash tray half a circle to one circle, if the furnace temperature is higher than 1050°C, adjust the saturated steam temperature to above 60°C, and control the saturated steam temperature to 50-55°C in normal operation

[0044] C. Before measuring the gas composition, measure the empty height of...

Embodiment 2

[0050] Embodiment 2: the preparation method of vanadium-based coal gasification catalyst

[0051] Use vanadium-containing 15% vanadium-containing steel slag, vanadium-containing 1.0% vanadium-containing stone coal, and add barium sulfate, in terms of mass percentage, vanadium-containing 15% vanadium-containing steel slag: vanadium-containing 1.0% vanadium-containing stone coal: barium sulfate=50:100 : 18, ingredients ball-milled to 80 mesh, oxidized and roasted at 920°C in a Φ1.8m×60m rotary kiln, and the roasted slag was ball-milled to -100 mesh. After testing, the new vanadium-based coal gasification catalyst contains 5.01% vanadium pentoxide.

[0052] Put the catalyst in a Φ0.8m single-stage gasifier with air + water vapor as the gasification agent, add 20kg of the catalyst pressure ball per ton of anthracite pulverized coal, and conduct a blank control test. After testing, the gas flow rate of the blank control increases by 30%. , CO content increased by 15%, CO 2 content...

Embodiment 3

[0055] The vanadium-containing stone coal is processed 400 tons per day, and the vanadium extraction factory with an annual output of 1,000 tons of vanadium pentoxide is produced. For this purpose, add 2% barium carbonate and oxidize and bake in a 2.8m×60m rotary kiln at 920°C. The industrial gas source of the rotary kiln is an industrial gas source that uses three φ2.8m single-stage gasifiers, uses lump bituminous coal with air + water vapor as the gasification agent, and produces industrial gas for the roasting of the rotary kiln. The roasted residue is leached and filtered with dilute sulfuric acid in three-stage countercurrent stirring, and the filtrate is extracted and separated with P204+tributyl phosphate+sulfonated kerosene, and the loaded organic phase is back-extracted with dilute sulfuric acid. Vanadium recovery by temperature sinking vanadium.

[0056] After technical transformation, the boiling roasting decarbonization section was cancelled, the vanadium-containi...

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Abstract

The invention specifically relates to a comprehensive utilization method for vanadium-bearing stone coal, belonging to the field of the coal chemical industry. According to the method, a certain amount of a vanadium-based coal gasification catalyst is added into the vanadium-bearing stone coal, a certain amount of coal is blended and a gasifying agent is used for gasification; produced coal gas is used as an industrial gas source; vanadic anhydride is extracted and recovered from gasification slag through a conventional vanadium leaching process; and vanadium-extracted leaching residues are used as a cement filler, so the purpose of comprehensive utilization is achieved. The comprehensive utilization method has the beneficial effects that 1, since the vanadium-bearing stone coal is blended with a certain amount of coal for catalysis of gasification, so the utilization rate of inferior coal is increased, and the scope of coal for gasification is enlarged; 2, coal resources in the vanadium-bearing stone coal is converted into exploitable energy, so high-quality coal resources are saved; and 3, since the vanadium-bearing stone coal is gasified instead of being roasted and gasification slag is subjected to vanadium extraction, an industrial gas source is provided, the flow of vanadium extraction process is simplified, production cost is reduced, and energy saving and emission reduction are realized because flue gas is reduced due to no roasting of the vanadium-bearing stone coal.

Description

technical field [0001] The invention belongs to the coal chemical industry, and in particular relates to a comprehensive utilization method of vanadium-containing stone coal. Background technique [0002] Vanadium-containing stone coal generally contains 0.6-1.0% vanadium pentoxide, less than 10% fixed carbon, ash content as high as 70-80%, and calorific value of only 800-1200 kcal, which is a low-quality coal. However, its reserves are huge, and the conversion of standard coal is 2.5 times the coal reserves ascertained in my country at present, and it is a potential energy resource. At present, vanadium-containing stone coal is mainly used as raw material for extracting vanadium pentoxide: adding certain additives and adopting various roasting methods for oxidative roasting, slag is extracted by water leaching or dilute acid leaching, and vanadium pentoxide is extracted by conventional vanadium extraction. The carbon resource of vanadium has not been utilized. Contents o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22
CPCY02P20/52
Inventor 杨秋良
Owner 湖北华威斯新能源科技有限公司