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Method for producing portland cement by using acetylene sludge

A technology of Portland cement and carbide slag, which is applied in the field of building materials, can solve the problems of low utilization rate of carbide slag and the inability to realize high-efficiency recovery of carbide slag, so as to achieve resource utilization, reduce pollution, and alleviate the shortage of mineral resources. Effect

Inactive Publication Date: 2017-07-25
HWASU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when using calcium carbide slag to produce cement clinker, the amount of calcium carbide slag added is relatively small, so the utilization rate of carbide slag is not high, and there are certain defects in the production method, and the efficient recovery of carbide slag cannot be realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for producing Portland cement by utilizing carbide slag, comprising the following steps: 1) mixing calcium carbide slag, limestone, and clay at a mass ratio of 5:0.8:0.6, and putting them into a mixer for uniform stirring;

[0028] 2) Put 14 parts of glutinous rice into the grinding device to grind into powder, add 135 parts of water, and heat at 95°C for 46 minutes, add 5 parts of rice wine and stir, put the mixture in the fermentation device and ferment for 7 minutes ;

[0029] 3) Stir and mix the reaction mixture after step 1) and the reaction mixture after step 2), put the mixture into a centrifuge for centrifugation for 14 minutes, add carbide slag, gypsum, ginkgo grass paste and mix Stir; after the mixture is pressed into shape, put it into a calciner for calcination, then take it out of the furnace for cooling, and pulverize it with a pulverizer; the mass ratio of the calcium carbide slag, gypsum, and ginkgo grass paste is 40:3:8; the calciner The tempe...

Embodiment 2

[0040] A method for producing Portland cement by utilizing carbide slag, comprising the following steps: 1) mixing calcium carbide slag, limestone, and clay at a mass ratio of 5:1.2:0.4, and putting them into a mixer for uniform stirring;

[0041] 2) Put 18 parts of glutinous rice into the grinding device to grind into powder, add 130 parts of water, heat at 110°C for 30 minutes, add 8 parts of rice wine and stir, put the mixture in the fermentation device for 5 minutes ;

[0042] 3) Stir and mix the reaction mixture after step 1) and the reaction mixture after step 2), put the mixture into a centrifuge for centrifugation for 17 minutes, add carbide slag, gypsum, ginkgo grass paste and mix Stir; after the mixture is pressed into shape, put it into a calciner for calcining, then take it out of the furnace for cooling, and pulverize it with a pulverizer; the mass ratio of the calcium carbide slag, gypsum, and ginkgo grass paste is 35:5:8; the calciner The temperature is 500°C; ...

Embodiment 3

[0053] A method for producing Portland cement by using carbide slag, comprising the following steps: 1) mixing calcium carbide slag, limestone, and clay at a mass ratio of 5:0.9:0.5, and putting them into a mixer for uniform stirring;

[0054] 2) Put 14-18 parts of glutinous rice into the grinding device to grind into powder, add 132 parts of water, heat at 98°C for 30 minutes, add 6 parts of rice wine for stirring, put the mixture into the fermentation device for fermentation 6 minutes;

[0055] 3) Stir and mix the reaction mixture after step 1) and the reaction mixture after step 2), put the mixture into a centrifuge for centrifugation for 14 minutes, add carbide slag, gypsum, ginkgo grass paste and mix Stir; after the mixture is pressed into shape, put it into a calciner for calcining, then take it out of the furnace for cooling, and pulverize it with a pulverizer; the mass ratio of the calcium carbide slag, gypsum, and ginkgo grass paste is 35:3:8; the calciner The temper...

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Abstract

The invention relates to a method for producing portland cement by using acetylene sludge. The method comprises the following steps: (1) mixing the acetylene sludge, limestone and clay, and evenly stirring; (2) grinding 14-18 parts of glutinous rice, then adding water and rice wine into the ground glutinous rice, stirring and fermenting; (3) evenly stirring the product of the step (1) and the product of the step (2), centrifuging, then adding the acetylene sludge, gypsum and gingko herb paste into the centrifuged mixture, and stirring; molding the mixture by pressing, then calcining, cooling, and crushing; (4) acidizing the acetylene sludge, taking out the acidized acetylene sludge, and crushing; then, mixing the crushed acetylene sludge with the clay and coal, carrying out suction filtration on the obtained mixture, adding diluted hydrochloric acid and then stirring, carrying out suction filtration, drying, and crushing; (5) mixing seaweed paste, starch and natural gum, then adding water into the obtained mixture, evenly stirring, sequentially adding the mixture obtained in the step (3) and the mixture obtained in the step (4) and stirring, adding a fire-proofing agent and activated carbon into the obtained mixture, evenly stirring, calcining, and grinding to obtain the portland cement. According to the method, cement clinker is calcined by using the acetylene sludge instead of limestone, so that the large-scale resourceful treatment of the acetylene sludge is realized.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for producing portland cement by utilizing carbide slag. 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. Research on other application technologies of calcium carbide slag has also made progress, such as replacing lime to desulfurize flue gas in thermal power plants, using it to produce silicon-calcium boards and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/42
CPCC04B7/24C04B7/428Y02P40/10
Inventor 罗炳文邹成磊魏昭辉张艳明陈群涛李毅
Owner HWASU
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