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Air inducing and purging system for titanium concentrate drying

A technology of ilmenite concentrate and induced air, which is applied in the direction of drying solid materials, drying gas arrangement, non-progressive dryer, etc., can solve the problems of increasing equipment load, reducing production efficiency, and high moisture content, preventing hardening and submitting to drying. The effect of efficiency

Active Publication Date: 2021-12-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium concentrate has a large specificity and slides along the inner wall after entering the drying rotary kiln. The particle size is fine and the moisture content is high. At the feed end, it is easy to harden on the flue gas return pipe and the inner wall of the drying rotary kiln, increasing equipment load and reducing production efficiency.

Method used

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  • Air inducing and purging system for titanium concentrate drying
  • Air inducing and purging system for titanium concentrate drying
  • Air inducing and purging system for titanium concentrate drying

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Experimental program
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specific Embodiment

[0027] In order to improve the indirect drying efficiency of titanium concentrate, the present invention provides a system and method for solving the hardening of titanium concentrate in the flue gas return pipe and the inner wall of the drying equipment, and accelerating the indirect drying rate. The compaction problem of the flue gas return pipe and the inner wall of the drying equipment is solved, and the drying efficiency is increased by more than 20%.

[0028] The method proposed by the present invention to solve the hardening of titanium concentrate in the flue gas return pipe and the inner wall of the drying equipment, and to speed up the indirect drying rate is as follows:

[0029]1. By adding a butterfly valve between the outlet of the flue gas induced draft fan and the chimney, the flue gas distribution ratio is adjusted through the opening of the butterfly valve, part of which is introduced into the rotary kiln as purge gas, and the rest is released through the chimn...

Embodiment 1

[0037] In the laboratory simulation of the drying process of titanium concentrate, the moisture content of the titanium concentrate feed is 8.9%, and the on-site flue gas is replaced by air heated to 93°C. When the purger is not added, the average hourly output of titanium concentrate is 51kg / h. The moisture content of the final titanium concentrate is 0.49%; the inner wall of the dry 1000kg titanium concentrate rotary kiln is hardened with 14.7kg of titanium concentrate. The on-site flue gas is replaced by air heated to 93°C, and when the purge is added, the output of titanium concentrate reaches 62.1kg / h, and the inner wall of the rotary kiln for drying 1000kg titanium concentrate is smooth without hardening. Yield increased by 20.78%.

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Abstract

The invention discloses an air inducing and purging system, particularly discloses an air inducing and purging system for titanium concentrate drying, and belongs to the technical field of design and manufacturing of metallurgical raw material production equipment. The air inducing and purging system for titanium concentrate drying can effectively prevent the titanium concentrate from hardening, and therefore the titanium concentrate drying efficiency is improved. The air inducing and purging system comprises an induced draft fan, a pressurizing assembly and a purging mechanism, the gas input end of the purging mechanism which is arranged in a rotary kiln and corresponds to the position of a flue gas main pipe is connected with the pressurizing assembly, and the gas input end of the pressurizing assembly is connected with the gas output end of the induced draft fan. In the drying process of the titanium concentrate, the titanium concentrate entering the rotary kiln through a discharging pipe is dispersed and suspended under the cooperation of the pressure gas output by the purging mechanism, and the titanium concentrate located on the inner wall of the rotary kiln and the outer side wall of the flue gas main pipe is separated from the corresponding side wall under the cooperation of the pressure gas output by the purging mechanism.

Description

technical field [0001] The invention relates to an induced air purging system, in particular to an induced air purging system for drying titanium concentrate, and belongs to the technical field of design and manufacture of metallurgical raw material production equipment. Background technique [0002] Titanium concentrate is obtained by enriching the tailings of iron-containing composite iron ore after iron selection as raw material. It has: the overall particle size is fine, but the thickness is uneven, and the proportion of particles smaller than 200 mesh (0.074mm) reaches 75%. % or more; the material has high moisture and is easy to agglomerate. The actual moisture entering the dryer during the production process is generally ~ 9%, but the highest can reach 12 ~ 13%; the specific gravity is large, and the true specific gravity reaches 4.30t / m3; poor fluidity, etc. features. [0003] The titanium slag produced by smelting titanium concentrate in an electric furnace is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B11/02F26B11/04F26B21/14F26B25/00F26B25/02F26B25/04
CPCF26B11/028F26B11/0477F26B21/14F26B25/005F26B25/02F26B25/04Y02P10/20
Inventor 齐建玲李占军刘功国樊河雲
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP