Method for preparing cement grinding aid by utilizing landfill leachate

A technology for cement grinding aid and landfill leachate, which is applied in the field of hazardous waste recycling, can solve the problems of increased production cost of cement grinding aid, achieve harmless treatment, promote recycling and save production costs Effect

Active Publication Date: 2019-05-28
SHANDONG ZHONGSEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main components of domestic cement grinding aids are chemical raw materials such as triethanolamine, and the use of these chemical raw materials will greatly increase the production cost of cement grinding aids

Method used

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  • Method for preparing cement grinding aid by utilizing landfill leachate
  • Method for preparing cement grinding aid by utilizing landfill leachate
  • Method for preparing cement grinding aid by utilizing landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] First, add 5.5Kg of sodium thiosulfate into 25.5Kg of water and stir. After completely dissolving, add 20Kg of landfill leachate and the filtrate after alkali reaction to it for stirring and homogenization, and then add 3Kg of consistency regulator, 1Kg Add the coupling agent into it and stir well, then add 20Kg of polyol into it and stir to dissolve, then add 15Kg of molasses to make it fully dissolved, and finally add 10Kg of stabilizer into it and stir evenly to get the finished cement grinding aid.

[0075] Take cement samples from different provinces, different cement manufacturers, and different varieties, and add the cement grinding aid respectively. The cement grinding aid prepared in Example 1 is added in a mass percentage of 0.05% in cement, according to GB / T17671-1999 " Cement mortar strength test method (ISO) method " carries out blending forming test, to verify this cement grinding aid to cement 3 days, 28 days compressive strength increasing effect, embodim...

Embodiment 2

[0080] First, add 6.0Kg of sodium thiosulfate into 23Kg of water and stir. After completely dissolving, add 20Kg of landfill leachate and the filtrate after alkali reaction to it for stirring and homogenization, and then add 4Kg of consistency regulator, 2Kg of Add the joint agent into it and stir well, then add 20Kg of polyol into it and stir to dissolve, then add 15Kg of molasses to make it fully dissolved, and finally add 10Kg of stabilizer into it and stir evenly to get the finished cement grinding aid.

[0081] Take cement samples from different provinces, different cement manufacturers, and different varieties, and add this cement grinding aid respectively. The cement grinding aid prepared in this embodiment 2 is added in a mass percentage of 0.05% in cement, according to GB / T17671-1999 " Cement mortar strength test method (ISO) method " carries out blending forming test, to verify this cement grinding aid to cement 3 days, 28 days compressive strength increasing effect, ...

Embodiment 3

[0086] First, add 7Kg of sodium thiosulfate into 23.5Kg of water for stirring, and after completely dissolving, add 20Kg of landfill leachate and the filtrate after alkali reaction into it for stirring and homogenization, and then add 3Kg of consistency regulator, 1.5Kg Add the coupling agent into it and stir well, then add 20Kg of polyol into it and stir to dissolve, then add 15Kg of molasses to make it fully dissolved, and finally add 10Kg of stabilizer into it and stir evenly to get the finished cement grinding aid.

[0087] Take cement samples from different provinces, different cement manufacturers, and different varieties, and add this cement grinding aid respectively. The cement grinding aid prepared in this embodiment 3 is added in a mass percentage of 0.05% in cement, according to GB / T17671-1999 " Cement mortar strength test method (ISO) method " carries out blending forming test, to verify this cement grinding aid to cement 3 days, 28 days compressive strength increas...

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Abstract

The invention provides a method for preparing a cement grinding aid by utilizing landfill leachate. The method comprises the following steps: firstly adding calcium hydroxide and/or sodium hydroxide according to a test situation, removing a peculiar smell, regulating pH (Potential of Hydrogen) value of the landfill leachate to be 11 to 13, then standing the landfill leachate for reacting, and thencarrying out filtration treatment on the landfill leachate after reaction, thus obtaining filter residue and filtrate; sequentially adding basic salt, the filtrate, a viscosity regulating agent, a coupling agent, polyol, molasses and a stabilizing agent into water, and stirring and dissolving until enabling the solution to be uniform, thus obtaining a finished product-the cement grinding aid. Under the situation that the adding amount of the cement grinding aid is 0.05 to 0.08 weight percent and under the situation that the yield is enabled to be essentially unchanged when a machine is groundby a cement component, the 3-day compression strength of cement can be increased to 3 to 7 MPa, and the 28-day compression strength of the cement can be increased to 5 to 10 MPa; not only the production cost of the cement grinding aid is reduced, but also resource utilization of the landfill leachate can be realized.

Description

technical field [0001] The invention relates to the technical field of recycling hazardous waste resources, in particular to a method for preparing cement grinding aids from landfill leachate. Background technique [0002] Landfill leachate is a liquid with high concentration of organic or inorganic components produced by the biochemical degradation such as compaction and fermentation during the process of stacking and landfilling garbage, and at the same time under the seepage of precipitation and groundwater. Long-term storage or disposal Improper use can easily pollute groundwater and farmland, and has been included in the "National List of Hazardous Wastes". At present, there are not many effective ways to deal with it in China, let alone reuse. [0003] my country's annual cement output is about 2 billion tons, accounting for more than 50% of the world's total cement production, and its output scale ranks first in the world. According to authoritative statistics, ever...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/10C04B103/52
Inventor 郭文倩彭立刚于吉涛唐樱燕
Owner SHANDONG ZHONGSEN TECH
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