Flaring-type rotary kiln for vanadium extraction of stone coal

Abstract

The invention relates to a flaring-type rotary kiln for vanadium extraction of stone coal. The technical scheme adopted by the invention is as follows: a left flaring-section kiln body, a straight barrel-section kiln body and a right flaring-section kiln body of a kiln body (3) are of an overall structure; a material outlet (9) is formed at a position adjacent to the left end of the kiln body (3), and a material inlet (1) is formed at a position adjacent to the right end of the kiln body (3); the left end of the interior of the kiln body (3) is coaxially and fixedly provided with a sleeve-type burner (10), and the center of the end face of the right end of the kiln body (3) is provided with a fume outlet (2); the excircle of the straight barrel-section kiln body is provided with a first jockey pulley group (6) and a second jockey pulley group (4); the first jockey pulley group (6) is mounted on a foundation platform (8) by virtue of a rotation pair (7); a bracket of the second jockey pulley group (4) is articulated with a piston rod of a hydraulic cylinder (5). The flaring-type rotary kiln has the characteristics of regulating the inclination angle of the central line of the rotary kiln, improving the preheating capability and heating capability of the rotary kiln, enabling the temperature distribution of the burning zone of the rotary kiln to be uniform and achieving high low-price vanadium conversion rate.

Description

technical field [0001] The invention belongs to the technical field of rotary kilns, in particular to a flared rotary kiln for extracting vanadium from stone coal. Background technique [0002] Oxidation and roasting of stone coal in a rotary kiln is one of the key links for vanadium extraction, and most traditional rotary kilns are straight cylindrical. When stone coal is roasted in a rotary kiln, the physical and chemical changes involved in the stone coal and the heat transfer process in the kiln are very complicated. The temperature distribution in the roasting zone and the oxidation distribution in the kiln are uneven, and it is difficult to achieve the expected preheating capacity of the rotary kiln. And heating capacity, which is not conducive to the oxidation of low-priced vanadium, resulting in insufficient roasting reaction of stone coal materials, thus affecting the quality of roasting. [0003] "A rotary kiln for extracting vanadium from stone coal" (CN101762153...

AI Technical Summary

Problems solved by technology

When stone coal is roasted in a rotary kiln, the physical and chemical changes involved in the stone coal and the heat transfer process in the kiln are very complicated. The temperature distribution in the roasting zone and the oxidation distribution in the kiln are uneven, and it is difficult to achieve the expected preheating capacity of the rotary kiln. And heating capacity, which is not conducive to the oxidation of low-priced vanadium, resulting in insufficient roasting reaction of stone coal materials, thus affecting the quality of roasting

[0003] "A rotary kiln for extracting vanadium from stone coal" (CN101762153A) patented technology and "A variable diameter rotary kiln" (CN202853343U) patented technology, both have a three-stage variable diameter structure, but the kiln body of the rotary kiln with this structure It is directly fixed on the foundation platform according to a certain inclination angle, which cannot complete the function of adjusting the inclination angle of the center line of the kiln body, and cannot control the moving speed of the material from the entrance to the exit, which limits the effect of vanadium extraction in the rotary kiln

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