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Sewage treatment material on basis of coal gasification fine residues and method for preparing sewage treatment material
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A technology of sewage treatment and coal gasification, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to enhance hydration cementation, improve interface bonding performance, and increase material strength Effect
Active Publication Date: 2019-05-10
CHANGAN UNIV
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Problems solved by technology
[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a sewage treatment material based on coal gasification fine slag and its preparation method, using industrial waste coal gasification fine slag as the main raw material to solve the probl
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Embodiment 1
[0030] A sewage treatment material based on coal gasification fine slag, prepared according to the following steps:
[0031] Step 1: Weigh 80g of coal gasification fine slag and 20g of ultra-fine Portland cement, add the above-mentioned raw materials weighed into the mixing pot, and mechanically stir for 5min at a speed of 30r / min to obtain a mixture; add the mixture to granulate In the machine, carry out screw extrusion granulation to obtain the primary material;
[0032] Step 2, put the initial material into a standard curing room with a temperature of 20°C and a relative humidity of 96%, the curing time is 28 days, the drying temperature is 100°C, and the drying time is 3 hours, and the sewage treatment material is obtained.
Embodiment 2
[0034] A sewage treatment material based on coal gasification fine slag, prepared according to the following steps:
[0035] Step 1, weigh 80g of coal gasification fine slag, 20g of superfine Portland cement and 2g of bentonite, add the above-mentioned raw materials weighed into a mixing pot, and mechanically stir for 8min at a speed of 32r / min to obtain a mixture; Put it into the granulator, carry out screw extrusion granulation, and get the initial material;
[0036] Step 2, put the initial material into a standard curing room with a temperature of 20°C and a relative humidity of 96%, the curing time is 28 days, the drying temperature is 100°C, and the drying time is 4 hours, and the sewage treatment material is obtained.
Embodiment 3
[0038] A sewage treatment material based on coal gasification fine slag, prepared according to the following steps:
[0039] Step 1, weigh 85g of coal gasification fine slag, 15g of superfine Portland cement, 2g of bentonite, 0.15g of chopped glass fiber and 0.15g of polycarboxylate superplasticizer, and add the above-mentioned raw materials weighed into the mixing pot, With a rotating speed of 35r / min, mechanically stir for 10 minutes to obtain a mixture; put the mixture into a granulator, and carry out screw extrusion granulation to obtain a raw material;
[0040] Step 2, put the initial material into a standard curing room with a temperature of 20°C and a relative humidity of 96%, the curing time is 28 days, the drying temperature is 105°C, and the drying time is 3.5 hours to obtain the sewage treatment material.
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Abstract
The invention discloses a sewage treatment material on the basis of coal gasification fine residues and a method for preparing the sewage treatment material. The sewage treatment material comprises raw materials including the coal gasification fine residues, superfine cement, bentonite, chopped glass fibers and water reducing agents. The method includes mixing the raw materials with one another toobtain mixtures; carrying out screw extrusion and granulation on the mixtures to obtain primary materials; curing and drying the primary materials to obtain the sewage treatment material. The sewagetreatment material and the method have the advantages that waste residues obtained after coal is gasified are used as main raw materials for the sewage treatment material, accordingly, sewage can be efficiently treated by the sewage treatment material, waste can be turned into wealth, and the sewage treatment material and the method are green and ecological and have environmental protection and economic benefits; the coal gasification fine residues do not contain heavy metal ions as compared with fly ash and coal gangue, and accordingly secondary pollution on water bodies can be prevented; hydration and settling effects of the ultrafine cement are realized, accordingly, hydration and settling effects of the sewage treatment material can be enhanced, the interface bond performance of the sewage treatment material can be enhanced, and the strength of the sewage treatment material can be improved.
Description
technical field [0001] The invention relates to the research field of water pollution prevention and control engineering, in particular to a sewage treatment material based on coal gasification fine slag and a preparation method thereof. Background technique [0002] my country is a country with a large population, but there is a serious shortage of water resources, making the per capita water resources at a relatively low level in the world. In recent years, with the continuous improvement of my country's industrialization and urbanization level and the continuous development of modern agriculture, the discharge of industrial and agricultural wastewater and urban domestic sewage has continued to increase, and the problem of water pollution has become increasingly serious. A large amount of sewage is directly discharged into rivers, lakes and seas without treatment, resulting in serious deterioration of water quality. The chemical oxygen demand, heavy metals, arsenic, cyanid...
Claims
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Application Information
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