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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, which is applied in the field of cement clinker production, can solve the problems of water environment pollution, heavy waste water pollution prevention and control tasks, etc. Effect

Inactive Publication Date: 2008-01-02
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

[0066] The present embodiment can adopt the black raw material production process, select secondary limestone (the content of GaO is 47.50%), pyrite (Fe 2 o 3The content is 26%), coal gangue, anthracite (5900 kcal / kg of calorific value) raw material, the following embodiments of the grade (ingredient content) of raw material are identical. The specific implementation scheme is as follows:

[0067] Mix and grind 76% limestone, 2% pyrite, 11% coal gangue, and 11% anthracite on a dry basis to form a black raw meal so that the fineness of the sieve through a 0.08mm sieve is no more than 10 %, sent to the ball-forming tray to add papermaking waste water to become black raw meal balls, wherein the weight of papermaking waste water added is 12% of the total weight of black raw meal balls. Then it is put into the vertical kiln and calcined to a partially molten state, and finally the clinker is discharged from the bottom of the kiln and cooled to normal temperature. After analyzing...

Embodiment 2

[0076] Embodiment 2 (preferred embodiment)

[0077] The production process of this embodiment is the same as that of Embodiment 1, but the ratio of raw materials is different. Select secondary limestone, pyrite, coal gangue, and anthracite raw materials, and the specific implementation methods are as follows:

[0078] Mix and grind 78% limestone, 2.5% pyrite, 10.5% coal gangue, and 9% anthracite on a dry basis to form a black raw meal so that the fineness of the sieve through a 0.08mm sieve is no more than 10 %, sent to the ball forming disc to add papermaking wastewater into black raw meal balls, wherein the weight of papermaking wastewater added is 13% of the total weight of black raw meal balls. Then put into the shaft kiln and calcined to a partially molten state, finally discharge the clinker from the bottom of the kiln, and cool to normal temperature, detect by the same method as Example 1, and all indicators are qualified. The comparison results of various indicators ...

Embodiment 3

[0087] The production process of this embodiment is the same as that of Embodiment 1, but the ratio of raw materials is different. Select secondary limestone, pyrite, coal gangue, and anthracite raw materials, and the specific implementation methods are as follows:

[0088] Mix and grind 79% limestone, 2.0% pyrite, 8.5% coal gangue, and 10.5% anthracite on a dry basis to make black raw meal, so that the fineness is no more than 10% through a 0.08mm sieve , sent to the ball-forming disc and add papermaking waste water to become black raw meal balls, wherein the weight of adding papermaking waste water is 12% of the black raw meal ball gross weight. , then put into the shaft kiln and calcined to a partially molten state, finally discharge the clinker from the bottom of the kiln, and cool to normal temperature, detect by the same method as Example 1, and all indicators are qualified. The comparison results of various indicators of the clinker produced before and after the use of...

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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 a method for producing Portland cement clinker and ordinary Portland cement by using papermaking wastewater instead of domestic water or groundwater. Background technique [0002] The paper industry is a traditional large water user and one of the important sources of water pollution. With the development of the economy, enterprises are increasingly facing the shortage of water resources and the shortage of raw materials. On the other hand, water pollution is becoming more and more serious. At present, my country's papermaking industry's wastewater discharge and COD discharge rank first among all types of industrial discharges in my country, and the papermaking industry has the most serious pollution to the water environment. In recent years, through unremitting efforts from many parties, the papermaking industry has achieved certain results in ...

Claims

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Application Information

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