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Necking-type rotary kiln for vanadium extraction of stone coal

A technology of rotary kiln and necking type, which is applied in the field of rotary kiln, can solve the problems that the residence time of stone coal particles cannot be guaranteed, the inclination angle cannot be adjusted, and the effect of vanadium extraction in rotary kiln is limited, so as to prolong the oxidation roasting time and roasting The effect of time, roasting reaction stability

Active Publication Date: 2015-06-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 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 Oxidation of low-valent vanadium, which 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 structure, but this structure cannot ensure that the stone coal particles There is enough residence time in roasting, and the kiln body of the rotary kiln is directly fixed on the foundation platform according to a certain inclination angle, which cannot realize the function of adjusting the inclination angle, which limits the effect of vanadium extraction in the rotary kiln

Method used

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  • Necking-type rotary kiln for vanadium extraction of stone coal

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Experimental program
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Effect test

Embodiment 1

[0022] A shrinking type rotary kiln for vanadium extraction from stone coal. The structure of the rotary kiln is as follows figure 1 Shown: including kiln body 3 , sleeve burner 10 , first supporting roller group 6 and second supporting roller group 4 . The kiln body 3 is composed of a left necking section kiln body, a straight barrel section kiln body and a right necking section kiln body. The left necking section kiln body, the straight barrel section kiln body and the right necking section kiln body are coaxial overall structures. The kiln body in the left necking section is in the shape of a truncated cone, the kiln body in the straight barrel section is of equal diameter, and the kiln body in the right necking section is in the shape of a truncated cone.

[0023] A material outlet 9 is provided near the left end of the kiln body in the left necking section, and a material inlet 1 is provided near the right end of the kiln body in the right necking section. The projectio...

Embodiment 2

[0029] A shrinking type rotary kiln for vanadium extraction from stone coal. Except following technical parameter, all the other are with embodiment 1.

[0030] The center distance L between the first supporting wheel set 6 and the second supporting wheel set 4 5 =(0.75~0.80)L 2 ;

[0031] The working stroke of the hydraulic cylinder 5 is L 4 =(0.11~0.20)L 5 ;

[0032] The ratio of the maximum diameter to the minimum diameter of the kiln body in the left necking section is 2R 1 : 2R 2 =(0.75~0.80):1;

[0033] The ratio of the length to the maximum diameter of the kiln body in the left necking section is L 1 : 2R 1 =(1.45~1.50):1;

[0034] The ratio of the length of the straight section kiln body to the diameter of the straight section kiln body is L 2 : 2R 2 =(6~7):1;

[0035] The ratio of the maximum diameter to the minimum diameter of the kiln body in the right necking section is 2R 3 : 2R 2 =(0.75~0.80):1;

[0036] The ratio of the length to the maximum diam...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/22C22B34/22
Inventor 王兴东幸福堂黄毫军王晶侯宇
Owner WUHAN UNIV OF SCI & TECH
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