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Vertical pulverizing and drying device

A vertical and grinding technology, applied in the field of vertical grinding and drying devices, can solve the problems of clogging of grinding rollers, unable to solve the content of carbide slag, etc., and achieve the effect of ensuring discharge that meets the standard

Inactive Publication Date: 2012-08-29
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can adapt to different humidity (12%-18%) calcium carbide slag by increasing the temperature of the gas entering the grinding mill, it still cannot solve the problem of grinding roller clogging caused by excessive calcium carbide slag content

Method used

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  • Vertical pulverizing and drying device
  • Vertical pulverizing and drying device
  • Vertical pulverizing and drying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 , 2 The vertical drying and grinding device shown includes a raw material pre-drying system and a raw material grinding device 1 , and the raw material pre-drying system includes a flue gas duct, a sloping plate feed box and an oscillating device 4 .

[0021] The flue gas duct includes: a flue gas introduction pipeline 11, a flue gas export pipeline 2 and an airflow speed increaser 5, and the airflow speed increaser can ensure a constant flow rate of the flue gas entering the feed box.

[0022] The sloping plate feeding box is provided with raw material feeding hopper 3, vibrating screen 7 and five sloping plates 8 from top to bottom. The shaft is also connected with five parallel inclined plates in the inclined plate type feeding box, and the raw material on the inclined plates 8 is kept at a constant speed through the high-frequency oscillation of the oscillation device 4 .

[0023] The five-fold slanted plate arrangement greatly prolongs the contac...

Embodiment 2

[0029] The device is the same as in Example 1, the raw meal for grinding is cement mixed raw meal, the aperture diameter of the vibrating screen is selected as 0.25 cm, the folding plate material is stainless steel with good heat transfer performance, and the processing flow is the same as in Example 1.

[0030] The water content of cement mixed raw meal is low after pressure filtration, so the 0.25cm vibrating sieve is used to split the press-filtered cement mixed raw meal. Difference. The moisture content of the pre-dried calcium carbide slag is reduced from about 25% to meet the requirements of vertical grinding (about 18%); the dust removal rate of flue gas reaches more than 95%.

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Abstract

The invention discloses an improved vertical pulverizing device suitable for pulverizing high-humidity raw cement materials. The device comprises a raw material pre-drying system and a raw material pulverizing device, wherein the raw material pre-drying system comprises a flue gas guide pipe, an oblique plate type feed tank and oscillating equipment; the flue gas guide pipe comprises a flue gas introduction pipeline, a flue gas delivery pipeline and an airflow speed increaser; a raw material feeding hopper, an oscillating screen and a plurality of oblique plates are arranged in the oblique plate type feed tank; and a bag type dust removal device is connected in back of the raw material pre-drying system. Pre-drying and pulverizing of the raw materials are organically combined by increasing the raw material pre-drying system, so that the vertical drying and pulverizing capacities are greatly promoted.

Description

technical field [0001] The invention relates to the technical field of cement raw meal grinding and drying, in particular to a vertical grinding and drying device suitable for cement raw meal with relatively high humidity. technical background [0002] Vertical mill drying technology is a traditional vertical mill widely used in the field of cement raw meal and clinker grinding and drying, especially in the process of producing cement clinker by wet grinding and dry burning. It is favored by technicians because it has a large adaptability range (≤15%) to the comprehensive moisture content of the raw meal to be ground. However, when the raw material to be ground is a calcareous raw material with a high mixing ratio (>50%) and a high moisture content (>35%) after dehydration, the comprehensive moisture content of 15% cannot meet the needs, and forced grinding will lead to Accidents of sticking of grinding rollers, reduction of grinding efficiency or even grinding stoppa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/52
Inventor 汪美贞冯华军陈应强沈东升宋二喜张弛廖燕
Owner ZHEJIANG GONGSHANG UNIVERSITY
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