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Method for calcining cement by taking carbide slag as raw material

A calcium carbide slag and calcination technology, which is applied in the field of calcined cement, can solve the problems of low utilization rate of carbide slag, consumption of carbide slag, and small consumption of carbide slag, so as to achieve resource utilization, reduce pollution, and alleviate the shortage of mineral resources. Effect

Inactive Publication Date: 2017-08-11
HWASU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbide slag has made some progress in the application of other fields, the amount of carbide slag used is relatively small, and it is difficult to consume all the generated carbide slag
There are also some manufacturers in existing enterprises that use carbide slag instead of limestone to produce cement, but the amount of carbide slag used is relatively small, so the utilization rate of carbide slag is not high, and it is impossible to realize efficient recovery of carbide slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for calcining cement with calcium carbide slag as raw material, comprising the following steps: 1) After mixing calcium carbide slag, limestone, and clay, they are put into a mixer and stirred evenly; the calcium carbide slag, limestone, and clay are mixed in a mass ratio of 7 ;2:1;

[0029] 2) Mix 14 parts of glutinous rice and 135 parts of water, and heat at 95°C for 46 minutes, put the mixture into a filter device for filtration, and take the filtrate;

[0030] 3) Stir sodium alginate, slaked lime, and chitosan at 20°C for 30 minutes, add 0.9 parts of acetic acid and stir the mixture for 50 minutes, add 9 parts of fiber gypsum, and stir the mixture for 17 minutes. After adding 0.9 parts of sodium hydroxide to adjust the pH value to 6.5, and stirring the mixture at 45°C for 20 minutes, add the filtrate filtered in step 2), and stir at 60°C for 37 minutes; The mass ratio of sodium alginate, slaked lime and chitosan is 3:4:1;

[0031] 4) Stir and mix the reac...

Embodiment 2

[0042] A method for calcining cement with calcium carbide slag as raw material, comprising the following steps: 1) After mixing calcium carbide slag, limestone, and clay, they are put into a mixer and stirred evenly; the calcium carbide slag, limestone, and clay are mixed in a mass ratio of 7 ;2:1;

[0043] 2) Mix 18 parts of glutinous rice and 130 parts of water, and heat at 110°C for 30 minutes, put the mixture into a filter device for filtration, and take the filtrate;

[0044] 3) Stir sodium alginate, slaked lime, and chitosan at 40°C for 20 minutes, add 1.5 parts of acetic acid and stir the mixture for 30 minutes, add 14 parts of fiber gypsum, and stir the mixture for 12 minutes. After adding 1.2 parts of sodium hydroxide to adjust the pH value to 5.5, and stirring the mixture at 55°C for 10 minutes, add the filtrate filtered in step 2), and stir at 65°C for 31 minutes; The mass ratio of sodium alginate, slaked lime and chitosan is 3:4:1;

[0045] 4) Stir and mix the re...

Embodiment 3

[0056] A method for calcining cement with calcium carbide slag as raw material, comprising the following steps: 1) After mixing calcium carbide slag, limestone, and clay, they are put into a mixer and stirred evenly; the calcium carbide slag, limestone, and clay are mixed in a mass ratio of 7 ;2:1;

[0057] 2) Mix 15 parts of glutinous rice and 132 parts of water, and heat at 99°C for 41 minutes, put the mixture into a filter device for filtration, and take the filtrate;

[0058] 3) Stir sodium alginate, slaked lime, and chitosan at 27°C for 25 minutes, add 1.2 parts of acetic acid and stir the mixture for 36 minutes, add 11 parts of fiber gypsum, and stir the mixture for 15 minutes. After adding 1 part of sodium hydroxide to adjust the pH value to 5.5, and stirring the mixture at 53°C for 18 minutes, add the filtrate filtered in step 2), and stir at 60°C for 36 minutes; The mass ratio of sodium alginate, slaked lime and chitosan is 3:4:1;

[0059] 4) Stir and mix the reacti...

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Abstract

The invention relates to a method for calcining cement by taking carbide slag as a raw material. The method comprises the following steps: 1) mixing and stirring carbide slag, limestone and clay; 2) mixing sticky rice and water, filtering, and taking the filtrate; 3) stirring sodium alginate, slaked lime, chitosan, acetic acid and fibrous plaster, regulating the pH value and stirring, adding the filtrate in the step 2, and stirring; 4) uniformly stirring and centrifuging the mixtures in the step 1) and the step 3), adding the carbide slag, stirring, performing compression molding, calcining and grinding; 5) stirring, centrifuging and drying the carbide slag with concentrated sulfuric acid and water, adding clay, starch and water for stirring, performing suction filtration, drying and grinding; and 6) mixing gypsum, herbal refined resins, tung oil and water, adding the materials in the steps 4) and 5) as well as auxiliary materials for uniformly stirring, calcining, grinding, thereby obtaining the Portland cement. According to the method disclosed by the invention, cement clinker is calcined by utilizing the carbide slag, and large-scale recycling of the carbide slag is realized.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for calcining cement using carbide slag as a raw material. Background technique [0002] Carbide slag is the industrial waste produced by the production of polyvinyl chloride by the acetylene method. In 2005, the discharge of carbide slag in my country exceeded 14 million tons, and the amount of carbide slag accumulated over the years exceeded 100 million tons. With the increase of the stock and annual discharge of carbide slag, long-term stacking pollutes the environment and occupies land resources, which has restricted the sustainable development of PVC production enterprises, and the effective utilization of carbide slag has become increasingly urgent. Although carbide slag has made some progress in the application of other fields, the amount of carbide slag used is relatively small, and it is difficult to consume all the generated carbide slag. There are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/36C04B7/42
CPCC04B7/24C04B7/36C04B7/424C04B7/427C04B7/428Y02P40/10
Inventor 丘永桂李毅王小勇王明钦魏昭辉
Owner HWASU
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