Environment-friendly ceramsite and preparation method thereof

Abstract

The invention discloses environment-friendly ceramsite and a preparation method thereof, belonging to the technical field of waste treatment and building materials. The environment-friendly ceramsiteis prepared from the following raw materials in parts by mass: 35-60 parts of lake sludge, 25-45 parts of cow dung and 10-25 parts of hearth ash. The preparation method comprises the specific following steps: mixing the lake sludge and the cow dung according to a certain ratio and carrying out uniform stirring to obtain sludge slurry; then according to a certain proportion, weighing the hearth ash, adding the hearth ash into the sludge slurry, and carrying out uniform stirring so as to obtain mixed slurry; then subjecting the mixed slurry to hermetic aging for 24 hours under the condition of aroom temperature; pouring the aged mixed slurry into a granulator to prepare raw material particles; putting the prepared raw material particles into a rotary kiln, carrying out preheating for a period of time, and conducting sintering according to a certain temperature schedule; and performing air cooling to room temperature so as to obtain the environment-friendly ceramsite with a particle sizeof 20-38 mm, a density grade of 400-600, stacking density of 296-523 kg/m<3>, cylinder compressive strength of 2.2-3.5 MPa, a one-hour water absorption rate of 7.8-10.0% and a heat conductivity coefficient of 0.35-0.54 W/(m.K). According to the invention, the recycling of wastes such as the lake sludge, the cow dung and the hearth ash is realized, environmental pollution is reduced, and the production cost of building materials is reduced.

Description

technical field [0001] The invention belongs to the technical field of waste treatment and building materials, and in particular relates to an environment-friendly ceramsite and a preparation method thereof. Background technique [0002] In the Yangtze River Delta, when farmers raise cattle, these cattle produce a lot of cow dung, but because the cow dung is difficult to rot, they often pile up a large amount of cow dung. In addition, the rural people here use straw and cotton stalks every day. The straw is used to boil water and cook three meals, thus producing a large amount of stove ash, which is taken out and piled up in front of and behind houses. Because the particles are so small, it floats everywhere when the wind blows, polluting the air, and when it rains, the stove ash still It will flow into rivers and pollute the limited fresh water quality on the earth. Therefore, wastes such as cow dung and stove ash have caused great troubles to the local environment. [000...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an environment-friendly ceramsite and a preparation method thereof. It uses lake sludge, stove ash and cow dung as raw materials, and undergoes processes such as crushing, weighing, mixing, stirring, aging, pressing, preheating, sintering, and cooling to prepare The particle size is 20-38mm, the density grade is 400-600, and the bulk density is 296-523kg / m 3 , The cylinder compressive strength is 2.2-3.5MPa, the 1-hour water absorption rate is 7.8-10.0%, and the thermal conductivity is 0.35-0.54W / (m·K). The ceramsite realizes the beneficial utilization of waste, solves the problem of waste pollution, and reduces Environmental pollution, with good social and economic benefits