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Method for producing potland cement clinker and portland cement using paper making waste water

A technology for Portland cement and papermaking wastewater, applied in the field of Portland cement clinker and Portland cement production, can solve the problems of water environmental pollution and heavy wastewater pollution prevention and control tasks, and achieve improved flammability and good environmental protection Significance and economic benefits, the effect of getting angry quickly

Inactive Publication Date: 2006-08-23
朱建伟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's paper industry wastewater discharge and COD discharge rank first among all kinds of industrial emissions in my country, and the paper industry has the most serious pollution to the water environment. In recent years, through unremitting efforts from many parties, the paper industry has achieved certain results in the prevention and control of water pollution. However, at present, about 50% of the wastewater from the paper industry has not been treated up to the standard, and the task of wastewater pollution prevention and control is still quite heavy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In this embodiment, black raw meal production technology can be used, and secondary limestone (the content of GaO is 47.50%), pyrite (Fe 2 O 3The content is 26%), coal gangue, anthracite (calorific value 5900 kcal / kg) raw materials, the grade (component content) of the raw materials is the same as in the following examples. The specific implementation scheme is as follows:

[0065] The dry basis weight composition is 76% limestone, 2% pyrite, 11% coal gangue, 11% anthracite, mixed and ground into black raw meal, so that its fineness is to pass through a 0.08mm sieve and the remainder is not more than 10 %, the paper-making wastewater is added to the ball-forming tray to form a black raw meal ball, and the weight of the paper-making wastewater added is 12% of the total weight of the black raw meal ball. Then it is put into the vertical kiln for calcination to a partially molten state, and finally the clinker is discharged from the bottom of the kiln and cooled to room temper...

Embodiment 2

[0071] Embodiment 2 (the best embodiment)

[0072] The production process of this embodiment is the same as that of embodiment 1, and the ratio of raw materials is different. The raw materials of secondary limestone, pyrite, coal gangue and anthracite are selected, and the specific implementation methods are as follows:

[0073] The dry basis weight composition is 78% limestone, 2.5% pyrite, 10.5% coal gangue, and 9% anthracite, mixed and ground into black raw meal, so that the fineness is to pass through a 0.08mm sieve and the remainder is not more than 10 %, sent to the ball-forming tray to add the paper-making wastewater into black raw meal balls, wherein the weight of the paper-making wastewater added is 13% of the total weight of the black raw meal balls. Then put it into the vertical kiln to be calcined to a partially molten state, and finally unload the clinker from the bottom of the kiln, and cool it to room temperature. According to the same method as Example 1, all the i...

Embodiment 3

[0079] The production process of this embodiment is the same as that of embodiment 1, and the ratio of raw materials is different. The raw materials of secondary limestone, pyrite, coal gangue and anthracite are selected, and the specific implementation methods are as follows:

[0080] The dry basis weight composition is 79% limestone, 2.0% pyrite, 8.5% coal gangue, 10.5% anthracite, mixed and ground into black raw meal, so that its fineness is not more than 10% through a 0.08mm sieve. , Send to the ball-forming tray and add the paper-making wastewater to form a black raw material ball, wherein the weight of the paper-making wastewater added is 12% of the total weight of the black raw material ball. , Then put it into the vertical kiln to be calcined to a partially molten state, and finally unload the clinker from the bottom of the kiln, and cool it to room temperature. According to the same method as Example 1, all the indicators are qualified. The comparison results of various i...

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PUM

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Abstract

The present invention provides a method of producing Portland cement clicker and Portland cement with papermaking waste water. Limestone in 75-81 wt%, pyrite in 1.8-3.2 wt%, coal gangue in 8-12 wt% and anthracite in 9-11 wt% are mixed and ground into black raw material; the black raw material is added with papermaking waste water in 10.5-14 wt% and produced into black raw material pellet; and the black raw material pellet is calcined in kiln to partial molten state, discharged from the kiln bottom and cooled to normal temperature to obtain the Portland cement clicker. The Portland cement clicker in 79-82 wt%, gypsum in 5-6 wt% and mixed material in 13-15 wt% are mixed and milled to obtain the Portland cement. By means of utilizing the lignin, polypentose and other fuel, sulfide and water in papermaking waste water, the present invention has lowered power consumption, water saving and other advantages.

Description

Technical field [0001] The invention relates to a method for producing cement clinker by using industrial wastewater, in particular to a method for producing Portland cement clinker and Portland cement by using papermaking wastewater instead of domestic water or groundwater. Background technique [0002] The paper industry is a traditional big water user and one of the important sources of water pollution. With the development of the economy, enterprises are increasingly facing the problem of water shortages and raw materials. On the other hand, water pollution is becoming more and more serious. At present, the discharge of wastewater and COD in my country's paper industry ranks first in the discharge of various industries in my country. The paper industry has the most serious pollution to the water environment. In recent years, through unremitting efforts, the paper industry has made certain achievements in water pollution prevention and control. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/42
Inventor 朱建伟陶志远
Owner 朱建伟
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