Core-shell structure silt solidification unsintered ceramisite and preparation method thereof

Abstract

The invention discloses a core-shell structure silt solidification unsintered ceramisite and a preparation method thereof. The core-shell structure silt solidification unsintered ceramisite is composed of a core material and a shell material, wherein the core material is compose of, by weight percentage, 13.00-13.49% of phosphate, 11.46-12.27% of overburnt magnesium oxide, 3.07-5.52% of coal ash,3.05-3.68% of silica fume, 33.12-32.51% of dried silt, 0.012-0.025% of light particles, 3.052-3.078% of borax, 1.22-1.23% of naphthalene water reducer and 29.44-30.67% of water; the shell material iscomposed of, by weight percentage, 44.90-48.79% of ordinary Portland cement, 5.10-9.04% of silica fume, 0.51-0.60% of sodium carbonate, 0.51-0.60% of sodium sulfate, 0.005-0.006% of HPMC (hydroxy propyl methyl cellulose), 1.015-3.624% of acrylic emulsion, 1.02-1.20% of naphthalene water reducer and 36.14-45.92% of water. The core-shell structure silt solidification unsintered ceramisite is prepared through core material balling, shell material coating and heating curing. Meanwhile, the core-shell structure silt solidification unsintered ceramisite is green, energy-efficient, low in water absorbency, good in degree of sphericity and simple in process and avoids the shortcomings of high energy consumption and emission of sintered ceramisites and high manufacturing prices and maintenance costof a rotary kiln.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a core-shell structure solidified silt unfired ceramsite and a preparation method thereof. Background technique [0002] Silt will damage the lake ecosystem and affect shipping. If the dredged silt cannot be used as a resource, it will cause secondary environmental pollution. At present, an important way to use silt as a resource is as a raw material for the production of ceramsite. [0003] Chinese patent 2018105188782 discloses a method of using fly ash, water plant sludge, paper mill sludge, and sewage plant sludge mixed with water in a certain proportion to form balls, and multi-stage heating to make fly ash sludge ceramsite. It is beneficial to solve the sludge waste treatment. Chinese invention 2018106632639 discloses a method of making aluminum sludge ceramsite by drying, preheating, sintering and cooling using raw materials such as aluminum sludge, glass pow...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned deficiencies, the object of the present invention is to provide a core-shell structure solidified silt burn-free ceramsite and its preparation method to solve the environmental pollution, water absorption and energy consumption problems of silt ceramsite

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