Necking-type rotary kiln for vanadium extraction of stone coal

Abstract

The invention relates to a necking-type rotary kiln for vanadium extraction of stone coal. The technical scheme adopted by the invention is as follows: a left necking-section kiln body, a straight barrel-section kiln body and a right necking-section kiln body of a kiln body (3) are of a coaxial 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 necking-type rotary kiln for vanadium extraction of stone coal has the characteristics of prolonging the burning time of materials in the rotary kiln, regulating the inclination angle alpha of the central line of the rotary kiln and improving the low-price vanadium conversion rate.

Description

technical field

[0001] The invention belongs to the technical field of rotary kilns, in particular to a necking type 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 complex, and the material stays in the rotary kiln for a short time, resulting in insufficient roasting reaction of the stone coal material, which is not conducive to The oxidation of low-valent vanadium affects the quality of roasting.

[0003] The patented technology of "a rotary kiln for extracting vanadium from stone coal" (CN101762153A) and the patented technology of "a rotary kiln with variable diameter" (CN202853343U) both have a three-stage variable diameter st...

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