Method for improving mixing ratio of burning ash in cement raw materials

A technology for incinerating ash and cement raw materials, applied in cement production, etc., to achieve the effects of reducing the content of harmful components, good experimental reproducibility, and low cost

Active Publication Date: 2011-01-05
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current research and reports, it is still rare to see a method aimed at increasing the blending ratio of incineration ash in raw meal under the premise of ensuring the stable operation of cement production and product quality

Method used

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  • Method for improving mixing ratio of burning ash in cement raw materials
  • Method for improving mixing ratio of burning ash in cement raw materials
  • Method for improving mixing ratio of burning ash in cement raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Step 1: Original Feature Analysis

[0037] A household waste incineration fly ash was taken from a place in Zhejiang Province, hereinafter referred to as fly ash 1#.

[0038] Fly ash from an industrial hazardous waste incineration was taken from a place in Zhejiang Province, hereinafter referred to as fly ash 2#.

[0039] A cement factory actually selects the following cement raw materials: limestone for calcareous raw materials, shale for clayey raw materials, copper slag for iron correction raw materials, and quartz sand for silicon correction raw materials.

[0040] The main components of the above-mentioned fly ash 1#, fly ash 2# and several cement raw materials are as follows:

[0041] Table 1 The main chemical components of incineration fly ash and cement raw materials

[0042]

[0043] Note 1 Alkali content according to Na 2 O+0.658K 2 O Calculated value representation;

[0044] It can be seen that the main components of fly ash 1# and 2# are both CaO-SiO ...

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Abstract

The invention provides a test method capable of effectively improving the mixing ratio of burning ash in cement raw materials. The method comprises the following steps of: analyzing original characteristics; performing washing pretreatment; firing ingredients to form clinker; and testing index and toxicity of the cement. The test method is designed completely aiming at a practical project, the raw materials are all the actual raw materials of a cement factory and the mixing ratio is also the actual production control ratio of the cement factory; the test method is well instructive to the project application; and on the premise of realizing stable operation of cement production and guaranteeing production quality, the test method greatly improves the mixing ratio of the burning ash in the cement raw materials. The whole test has the advantages of relatively a few involved large instruments, convenient operation, low cost and high test reproducibility.

Description

technical field [0001] The invention relates to the field of solid waste disposal, in particular to a method for increasing the mixing ratio of incineration ash in cement raw materials. Background technique [0002] In recent years, the internationally emerging solid waste cement kiln co-processing technology provides a new development direction for the realization of incineration ash treatment and resource utilization because it avoids the secondary treatment and turnover pollution of incineration ash. [0003] However, since the chlorine, sulfur, alkali and other components contained in the incineration ash are the incentives to cause the crust blockage in the cement kiln, it is easy to cause frequent production shutdown accidents, which greatly limits its application in cement production, especially chloride ions, cement The industry has a very strict limit (not more than 0.03%) for chloride ions in raw materials. In order to ensure that the content of harmful components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/28C04B7/38
CPCY02P40/10
Inventor 沈东升郑元格冯华军邓友华冯小晏郭梦婷陈应强徐栋张弛廖燕宋二喜
Owner ZHEJIANG GONGSHANG UNIVERSITY
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