Coal gasification furnace slag cementing material assisted and excited by coal chemical strong salt wastewater and preparation method thereof
A technology for coal gasification slag and cementitious materials, which is applied in solid waste management, climate sustainability, sustainable waste treatment, etc., can solve problems such as land occupation, environmental pollution, etc. and low operator requirements
Inactive Publication Date: 2021-09-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
[0004] In order to solve the above-mentioned problems in the prior art, the present invention provides a coal gasification slag cementitious material and a preparation method for auxiliary excitation of coal chemical concentrated salt wastewater, and provides a new method for the comprehensive utilization of industrial solid waste such as coal gasification slag , to solve the problem of land occupation and environmental pollution caused by coal gasification slag stacking
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Embodiment
[0029] The preparation of the coal gasification slag cementitious material assisted by the concentrated salt wastewater of the coal chemical industry includes the following steps:
[0030] Coal gasification slag powder, cement, flaky sodium hydroxide and mixing water are mixed to obtain the cementitious material, wherein the consumption of each raw material used in Examples 1 to 5 is as shown in Table 1:
[0031] Table 1
[0032]
[0033]
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Abstract
The invention discloses a coal gasification furnace slag cementing material assisted and excited by coal chemical strong salt wastewater and a preparation method thereof, and belongs to the technical field of comprehensive utilization of industrial solid wastes. The cementing material comprises the following raw materials: a solid raw material, an alkali activator and mixing water; the solid raw material is coal gasification furnace slag and cement; and the mixing water comprises water and coal chemical industry concentrated salt wastewater in a weight ratio of (0-3): 1; and the cementing material is obtained by mixing the coal gasification furnace slag, the alkali activator, the cement and the mixing water. The cementing material prepared by the invention is high in compressive strength, especially high in early strength; the coal gasification furnace slag is used as a main raw material, so that the problems of land occupation and environmental pollution caused by coal gasification furnace slag discharge are solved, and positive environmental benefits are achieved; and popularization and application of the cementing material can effectively reduce the usage amount of the cement-based inorganic cementing material, so that consumption of resources and energy in cement production is reduced, and environmental protection is facilitated.
Description
technical field [0001] The invention belongs to the technical field of comprehensive utilization of industrial solid waste, and in particular relates to a coal gasification slag cementitious material and a preparation method for auxiliary excitation of coal chemical concentrated salt wastewater. Background technique [0002] Coal gasification slag is industrial solid waste discharged in the process of coal chemical industry. The new coal chemical industry uses coal as raw material and transforms it into petroleum or petrochemical products through chemical deep processing, mainly including coal-to-oil, coal-to-olefin, coal-to-oil Natural gas, coal to ethylene glycol, coal to dimethyl ether, etc. The rapid increase in demand for energy such as oil and natural gas has resulted in the production of a large amount of coal gasification slag, accompanied by the generation of coal chemical concentrated salt wastewater. If these waste residues and waste water cannot be effectively d...
Claims
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IPC IPC(8): C04B28/04C04B18/06C04B22/00
CPCC04B28/04C04B18/065C04B22/0046C04B2201/50C04B22/062Y02W30/91
Inventor 吴锋李辉白云马旭东
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY