Stale refuse slag powder and stale refuse plastic sludge sand ceramsite and manufacturing method thereof

Abstract

The invention relates to a stale refuse slag powder and stale refuse plastic sludge sand ceramsite and a manufacturing method thereof. Materials, material proportions and manufacturing technological process of the ceramsite are as follows: the material proportions of the ceramsite are as follows: 55-75% of stale refuse slag powder, and 25-45% of stale refuse plastic sludge sand. The manufacturing technological process of the ceramsite comprises the following steps of: drying the stale refuse slag powder with a particle size of less than 20mm, enabling the stale refuse slag powder to pass through a 0.6mm square hole screen, levigating screened residue slag particles, and enabling a levigated product to pass through the 0.6mm square hole screen; and respectively metering sludge sand obtained through carrying out separation on sludge water (obtained through carrying out water washing on stale refuse plastics) through a sludge water separator and the stale refuse slag powder with a particle size of less than 0.6mm, carrying out granulation by using a roll extruder, drying obtained raw ceramsite particles by using waste heat, feeding the raw ceramsite particles into a rotary sintering kiln to carry out high-temperature sintering, and drawing an obtained product out of the kiln to cool. The ceramsite is characterized in that the material selection is scientific and the material preparation is reasonable, the waste utilization ratios of the stale refuse slag powder and the stale refuse plastic sludge sand are high, and the ceramsite meets the requirements of GB / T17431.1 in the 'Lightweight Aggregates and Its Test Methods-Part 1: Lightweight Aggregates'.

Description

technical field [0001] The invention relates to multiple technical fields of environmental protection, resource comprehensive utilization and building material manufacturing, and specifically relates to a kind of old garbage slag powder and old garbage plastic which use old garbage slag powder as the main raw material and old garbage plastic sludge sand as the secondary raw material. Sludge sand ceramsite and its manufacturing method. Background technique [0002] Since the reform and opening up, the Chinese government has attached great importance to the treatment and management of urban waste, prohibiting waste incineration and casual disposal, and adopts centralized landfills for disposal. Landfills are generally selected in the suburbs far from the city center. More than 30 years have passed, my country's national policy of reform and opening up has achieved shocking development, especially the rapid urbanization process, the city continues to extend outwards, the origin...

AI Technical Summary

Problems solved by technology

[0008] A kind of stale garbage slag powder, stale garbage plastic sludge sand ceramsite and the manufacturing method thereof of the present invention comprise stale garbage slag powder, stale garbage plastic sludge sand; About 1 / 3 of the total amount is the largest category, with a moisture content of about 35.2% and a dry bulk density of about 895Kg / m 3 From the physical point of view, the stale garbage slag powder with a particle size of less than 20mm contains gravel, sand, bricks, hard plastics, broken glass, broken ceramics, broken cinders, broken plastics, etc., with a square of 0.6mm Sieve through a hole sieve, containing crushed stones, coarse sand, broken bricks, broken tiles, hard plastics, broken glass, broken ceramics, broken coal cinders, broken plastic pieces, etc., accounting for about 48% of the total. The powder material accounts for about 52%, and the sand content in the bottom powder material accounts for about 49%. The sand content is about 60.1%; the stale garbage plastic sludge sand contains about 1.7% of waste plastic debris, about 15.2% of fine sand, about 2% of light plant debris, and about 81.1% of soil content. The dry bulk density of garbage plastic sludge sand powder is 690kg / m 3 Although the stale garbage powder after treatment has the chemical composition and physical properties of ceramsite alone, there are two major defects: one is that it is difficult to form balls or granulate due to its more organic plant powder and less silicon material The second is that the silicon dioxide and aluminum oxide contained in it are insufficient, resulting in low strength of the formed ceramsite, and some will form powder balls

Images