Stale refuse residue powder and fly ash ceramsite and manufacturing method thereof

Abstract

The invention relates to stale refuse residue powder and fly ash ceramsite and a manufacturing method thereof. Materials, proportion and manufacturing process flow are included. The stale refuse residue powder and fly ash ceramsite comprises, by weight, 47%-56% of stale refuse powder, 34%-47% of fly ash and 6-10% of coal dust. The manufacturing process flow is that the stale refuse powder with the grain size smaller than 20mm is dried and screened through a 0.6mm square hole screen, and screen residue particles are levigated and screened through the 0.6mm square hole screen; the stale refuse powder, the fly ash and the coal dust which have the gain sizes of smaller than 0.6mm are respectively calculated; after dry mixing of the stale refuse powder, the fly ash and the coal dust for 1min, 1 / 3 of water is added, wet mixing is performed for 2min, the mixed wet powder is fed into a pelletizing tray, water is added to perform pelletizing, and the ceramsite raw material balls are placed in a double-layer continuous type ceramsite sintering kiln to be roasted, are taken out of the kiln to be cooled and undergo crushing separation. The stale refuse residue powder and fly ash ceramsite and the manufacturing method of the ceramsite have the advantages that materials are selected scientifically, the proportion is reasonable, the waste utilizing rate of the stale refuse residue powder and the fly ash is high, and the ceramsite meets the requirements of Lightweight Aggregate and Part 1 of Test Method thereof: Lightweight in the national standard.

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 an old garbage slag powder and fly ash using old garbage slag powder and fly ash as the main raw materials and coal powder as the secondary raw material. 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 original landfill has now become an urban area, ...

AI Technical Summary

Problems solved by technology

At first, I mistakenly thought that the old garbage slag powder with a particle size of less than 20mm was organic soil, which could be used as garden or agricultural fertilizer. Old garbage slag powder with a particle size of less than 20mm contains harmful substances such as nitrates and heavy metals, which seriously pollute soil and groundwater resources. According to authoritative agency testing: 1 ton of garbage pollutes at least 5 tons of groundwater; the second is from the physical form. The stale garbage slag powder with a particle size of less than 20mm contains crushed stones, sand, bricks, hard plastic blocks, broken glass, broken ceramics, broken cinders, broken plastics, various metals, etc., accounting for 48% of the total. Sieve with a 0.6mm square hole sieve, and the sand content in the powder at the bottom of the sieve accounts for 49%, which is not suitable for the growth of plants and crops at all, and is very harmful to the soil.

[0004] At present, under the situation that the country is vigorously developing circular economy, there are more ways to comprehensively utilize high-quality fly ash, but for low-quality fly ash with high loss on ignition (loss on ignition greater than 15%), cement plants, Concrete commercial mixing plants, building materials enterprises and other units, because the loss on ignition is too high, do not meet the requirements of the national standard "Fly Ash Used in Cement and Concrete" GB / T1596, out of helplessness, they still use landfill processing, we should actively look for a new way of utilization

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