Method for preparing pore gradient self-cleaning water permeable brick from coal gangue ceramsite

Abstract

The invention relates to the field of preparation of coal gangue water permeable bricks, in particular to a method for preparing a pore gradient self-cleaning water permeable brick from coal gangue ceramsite. Coal gangue is used as a main raw material, low-temperature glass frit powder is used as a binder, oxides such as zinc oxide are used as photocatalysts, and sodium carboxymethyl cellulose with the concentration of 0.2% is used as a pelletizing auxiliary agent to prepare the coal gangue ceramsite water permeable brick. Wherein the adding amount of the low-temperature glass frit powder is 5%, the sintering temperature is 1250 DEG C, and the heat preservation time is 30 min. The water permeable brick obtained by the invention is relatively good in performance, the water absorption rate is 8.79%, the compressive strength is 4.22 MPa, the porosity is 12.38%, and the water permeability coefficient is 2.33 * 10 <-2 >.

Description

technical field [0001] The invention relates to the field of preparation of coal gangue permeable bricks, in particular to a method for preparing pore gradient self-cleaning permeable bricks from coal gangue ceramsite. Background technique [0002] Coal mining and processing will produce a large amount of solid waste—coal gangue, which is one of the industrial solid wastes with the largest annual discharge and cumulative accumulation in my country. Its main component is Al 2 o 3 , SiO 2 , also contains a certain amount of Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O.P 2 o 5 , SO 3 And trace rare elements (gallium, vanadium, titanium, cobalt, etc.), these components determine its broad application prospects in the building materials industry. The utilization of coal gangue in the market mainly includes: ① recovery of coal and pyrite, ② use in power generation, ③ manufacture of building materials, ④ bio-fertilizer. [0003] At present, coal gangue is mainly used in the product...

AI Technical Summary

Problems solved by technology

There are relatively few manufacturers producing gangue-type permeable bricks, and the technology is not perfect enough

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