A kind of inorganic environmental protection board and preparation method thereof

Abstract

The application relates to an inorganic environmental protection board and a preparation method thereof, and relates to the technical field of environmental protection boards. The inorganic environmental protection board comprises: 30-50 parts of coal gangue, 2-6 parts of cement, 0.2-0.4 parts of a reinforcing agent, and 6- parts of an aqueous curing agent 10 parts; the preparation method includes: dissolving the solidifying agent in water to form a solidifying agent aqueous solution according to the mass ratio of 2-4:100; taking 30-50 parts of coal gangue, 2-6 parts of cement, and 0.2 parts of reinforcing agent by weight ‑0.4 part and 6‑10 parts of the curing agent aqueous solution, mixed uniformly to obtain a mortar-like mixture; after injecting the mortar-like mixture into a grid mold and smoothing, press-molding to obtain a prefabricated board; after natural curing of the prefabricated board, an inorganic Eco-friendly sheet. In the present application, using coal gangue as the main raw material, the compound speed of coal gangue and cement is accelerated by the curing agent aqueous solution, and the solidification molding time is shortened, and the strength of the board is increased by the reinforcing agent, which not only increases the utilization rate of coal gangue, but also reduces the production cost of the board. Moreover, the formed sheet has high flexural and compressive strength.

Description

technical field [0001] The present application relates to the technical field of environmental protection boards, in particular to an inorganic environmental protection board and a preparation method thereof. Background technique [0002] Coal gangue is the solid waste discharged from the coal mining process and coal washing process. 2 O 3 and SiO 2 . At present, the accumulation of coal gangue in my country is more than 3.5 billion tons, accounting for more than 40% of the total industrial solid waste discharge in China. If the coal gangue is not used, it will not only occupy a large area of ​​land, but also the sulfide escape or leaching in the coal gangue will pollute the atmosphere, farmland and water bodies. [0003] In the related art, in the process of producing environmentally friendly plates with raw coal gangue and construction waste as the main raw materials, various organic and inorganic auxiliary materials need to be added, and then the plates are produced b...

AI Technical Summary

Problems solved by technology

However, due to the strength requirements of the formed board, the proportion of gangue added is low, and the utilization rate of gangue is not high. In addition, because the raw materials contain organic matter, there are limitations in combustibility, flexural strength and compressive strength, and The cost is also higher