Thermal-insulating, oxidizing and cooling device used in vanadium extraction from stone coal and using method of device

Abstract

The invention relates to a thermal-insulating, oxidizing and cooling device used in vanadium extraction from stone coal and a using method of the device, and the device belongs to the technical field of vanadium extraction. The thermal-insulating, oxidizing and cooling device comprises a secondary air fan, a screening chute, a thermal-insulating and oxidizing segment, a heat compensation system, a cooling segment, a vibrating discharge device and a chain-slat conveyor, wherein the screening chute is supported on a beam at the upper part of the thermal-insulating and oxidizing segment in an inclined way and an angle of 25 degrees is formed between the screening chute and the horizontal surface, the thermal-insulating and oxidizing segment is arranged under the screening chute, the cooling segment is arranged below the thermal-insulating and oxidizing segment; the cooling segment is directly communicated with the thermal-insulating and oxidizing segment in a welded way, the lower end of the cooling segment is connected with the vibrating discharge device through bolts; conveying equipment, namely the chain-slat conveyor is arranged at a 350mm part below the vibrating discharge device; the heat compensation system is arranged 300mm above the connection part of the thermal-insulating and oxidizing segment and the cooling segment; the heat compensation system is connected with the thermal-insulating and oxidizing segment through flange bolts; the secondary air fan is introduced into the cooling segment (5) through an air pipeline; and the air pipeline of the secondary air fan (1) is connected with the cooling segment (5) through flange bolts. The thermal-insulating, oxidizing and cooling device and the using method of the device have the advantages of solving the problems such as insufficient oxidizing atmosphere and short thermal insulation time in stone mine calcination.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction, and in particular relates to a heat preservation, oxidation and cooling device for extracting vanadium from stone coal and a use method thereof. Background technique [0002] Vanadium is a rare, weak and viscous transition metal. It is an important strategic substance. With the increase of vanadium demand, vanadium extraction from stone coal appears in China. The key to extract vanadium from stone coal is to extract trivalent vanadium from stone coal To convert into pentavalent vanadium, the traditional process adopts shaft kiln roasting. Due to uneven roasting temperature, insufficient oxygen atmosphere, and time cannot be accurately controlled, the conversion efficiency of trivalent vanadium into pentavalent vanadium in stone coal is low. The transformation of trivalent vanadium in stone coal into pentavalent vanadium requires a specific oxidation atmosphere, suitable temperature an...

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Problems solved by technology

[0003] The object of the present invention is to provide a heat preservation, oxidation and cooling device for extracting vanadium from stone coal and its use method, so as to solve the problems of short heat preservation time, insufficient oxidation atmosphere, insufficient oxidation and low conversion rate of trivalent vanadium in stone coal roasting

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