Sintered brick prepared by utilizing paper mill sludge and preparation method thereof

Abstract

The invention discloses a sintered brick prepared by utilizing paper mill sludge and a preparation method thereof. The sintered brick is formed by the following components in part by weight: 7 parts of clay, 2 parts of coal gangue and 1 part of sludge. The preparation method comprises the following steps of (1) crushing and filtering the coal gangue, and feeding into a coal gangue feeder; (2) crushing and filtering the clay, and feeding into a clay feeder; (3) fully mixing the sludge, the processed coal gangue and the processed clay through a distributor according to a fixed proportion to prepare a raw material, and blank forming, drying and sintering the mixed raw material to prepare a finished product. The applicant finally discovered the mixed proportion of 7 to 2 to 1 through a number of research experiments and trial production and continuous compressive strength detection of bricks, so that the compressive strength of the bricks meets the national standard, the product quality is high, some products reach the level of products of the same kind in advanced countries, the market is broadened, and the application surface is gradually enlarged. Not only is the difficult problem of sludge treatment of a paper mill solved, but also the consumption of the clay and the coal gangue caused by traditional sintered bricks is avoided.

Description

technical field [0001] The invention relates to the recycling technology of paper mill sludge, in particular to a sintered brick prepared by papermaking sludge and a preparation method thereof. Background technique [0002] With the development of the paper industry and the construction of pollution prevention and control facilities, the sludge generated after the papermaking wastewater is treated by the treatment facilities has become a new source of pollution. Except for part of the sludge that is comprehensively utilized, the rest is disposed of in sanitary landfills. A large amount of land needs to be buried every year, which wastes land resources and produces secondary pollution. Papermaking sludge is a biological solid waste, which not only contains a large amount of cellulose organic matter and plant nutrients such as nitrogen, phosphorus, and potassium, but also contains trace amounts of heavy metals and pathogenic bacteria. According to this characteristic, paperma...

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Problems solved by technology

The above-mentioned sludge treatment method needs to effectively separate the various components inside the sludge, and the cost is high, so it is not suitable for promotion in all regions

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