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A method and device for roasting low-quality coal to extract vanadium and pure oxygen

A low-quality coal, pure oxygen technology, applied in the direction of improving energy efficiency, improving process efficiency, waste heat treatment, etc., can solve the problems of waste heat resources, insufficient combustion, incomplete oxidation, etc., to improve combustion temperature and reduce emissions. Smoke loss, the effect of promoting oxidative combustion

Active Publication Date: 2018-04-06
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing vanadium extraction technology by oxidative roasting generally suffers from insufficient combustion and incomplete oxidation
At the same time, high-temperature waste heat cannot be efficiently utilized, wasting waste heat resources

Method used

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  • A method and device for roasting low-quality coal to extract vanadium and pure oxygen
  • A method and device for roasting low-quality coal to extract vanadium and pure oxygen

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Embodiment Construction

[0017] The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:

[0018] Such as Figure 1-2 As shown, a device used in a method for extracting vanadium from low-quality coal and roasting with pure oxygen includes an oxygen system 18, an oxygen preheating system 17, a hot oxygen pressure regulating system 21, a roasting furnace 3, and a dust collector 12 connected in sequence.

[0019] The top of the roasting furnace 3 is provided with a storage bin 1 and a feeding device 2, the interior of the roasting furnace 3 is provided with a grate 4, the interior of the furnace wall of the roasting furnace 3 is provided with a water-cooled jacket 8, and the lower part of the water-cooled jacket 8 is provided with a jacket water The inlet 9 and the upper part of the water-cooling jacket 8 are provided with a jacket water outlet 10, and the jacket water outlet is externally connected to a steam-water separator.

[0020] The bot...

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Abstract

The invention relates to a method for roasting low-quality coal to extract vanadium and pure oxygen. Pure oxygen is alternately blown into the roaster through two oxygen inlets at the bottom of the roaster, and the low-quality coal inside the roaster is burned in the uniformly flowing oxygen. Fully oxidize the III-valence vanadium in the low-quality coal; the high-temperature flue gas produced by the roaster preheats the pure oxygen before entering the roaster to promote oxidative combustion; the radiant heat of the roaster furnace is used to produce water vapor; the invention makes the roaster The oxygen inside flows evenly, and the combustion is complete, ensuring that the valence III vanadium in the low-quality coal is completely oxidized to the valence V vanadium which is soluble in acid. The radiant heat generated by oxidation and roasting in the furnace is effectively recycled to achieve the purpose of saving energy and reducing consumption.

Description

technical field [0001] The invention relates to the production field of vanadium extraction from low-quality coal, which mainly exists in the form of isomorphic vanadium in the silicate lattice with a carbon content of <30%, and particularly relates to a method and device for extracting vanadium from low-quality coal and roasting with pure oxygen . Background technique [0002] The technical difficulty of vanadium extraction from low-quality coal is to oxidize the vanadium with valence III in the ore to high-valence vanadium with valence V as much as possible. The production process for vanadium extraction from low-quality coal mainly depends on the presence of vanadium in the ore. If the vanadium in low-quality coal mainly exists in the form of adsorption, the wet process can be used to extract vanadium, and the low-quality coal can be directly leached with acid or alkali solution to dissolve vanadium in the form of various vanadate ions; If the vanadium in low-quality ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22F27D17/00
CPCC22B1/02C22B34/22F27D17/004Y02P10/20Y02P10/25
Inventor 胡建江门传政唐宇李欢谢国威李晓堂毕仕辉
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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