Micro-pore filtration and purification stone and preparation method thereof

Abstract

The invention relates to a micro-pore filtration and purification stone and a preparation method thereof. The micro-pore filtration and purification stone is prepared from the following raw materials in parts by weight: 70-85 parts of sand, 14-20 parts of mineral powder, 1-2 parts of binder powder and 1.656-1.84 parts of water, wherein the melting point of sand is greater than that of mineral powder, and binder powder is a water-soluble binder. The preparation method comprises the following steps: (1) uniformly stirring the sand, the mineral powder and the binder powder, adding water and mixing and stirring the mixture, so as to obtain mixed slurry; (2) placing the mixed slurry into a mould for molding, so as to obtain a stone blank; and (3) firing the stone blank to enable the stone blank to be molded and generate structure holes through which liquid or gas can pass, so as to obtain the micro-pore filtration and purification stone. According to the micro-pore filtration and purification stone, both a liquid working medium and a gas working medium can be filtered; the micro-pore filtration and purification stone is high in strength, corrosion-resistant and high-temperature-resistant; the stone can be prepared into various applicable shapes according to filtration requirements and is high in universality, strong in adsorbability and high in impurity removing efficiency; and the pore size can be adjusted.

Description

technical field [0001] The invention relates to the field of liquid or gas filtration and purification, in particular to a microporous filtration purification stone and a preparation method thereof. Background technique [0002] The filter medium refers to any porous material that allows the working medium to pass through and intercepts solid particles or liquid droplets in it to achieve the purpose of separation or purification. Commonly used filter media in industry are: (1) Woven materials, filter cloth and filter screens woven from natural or synthetic fibers, metal wires, etc., are the most commonly used filter media in industrial production. Such materials are cheap, easy to clean and replace, and the minimum particle size that can be retained is 5-65 μm; (2) Porous solids, including bisque, sintered metal or glass, or porous solids bonded by plastic fine powder plastic tubes etc. The minimum particle size that can be intercepted by this type of material is 1-3 μm, a...

AI Technical Summary

Problems solved by technology

For aquaculture and gas filtration and purification, porous solids are mostly used. Currently, such filter media on the market are mostly made of ceramic materials. Due to the material properties of ceramic powder itself, its particle size is small, and the gap between particles The pores are tight, and the ceramic powder melted at high temperature will make almost all the gaps bond together. The pore range of the filter medium formed is difficult to control, and it is difficult to prepare filter media of different sizes. Therefore, ceramic materials are usually used. The pore size range of the product is small, basically distributed between 1-10μm, the range of filtration and purification is narrow, it is impossible to purify sewage of various water qualities, and its filtration and purification effect is not high