Aged garbage slag powder haydite and manufacturing method thereof

Abstract

The invention relates to an aged garbage slag powder haydite and a manufacturing method thereof. The aged garbage slag powder haydite comprises 86-90% of aged garbage powder and 10-14% of coal powder. The technical process comprises the following steps: drying aged garbage slag powder with particle size of smaller than 20mm, passing through a 0.6mm square mesh sieve, milling the sieve residues, passing through the 0.6mm square mesh sieve, respectively measuring the aged garbage powder with particle size of less than 0.6mm and coal powder, carrying out dry mixing for about 1 minute, adding 1 / 3 of water, carrying out wet mixing for about 2 minutes, sending the mixed wet aged garbage powder into a pelletizing disk, adding water for pelletization, roasting the aged garbage slag powder haydite fresh pellets in a double-layer continuous haydite sintering kiln, discharging, cooling, crushing and separating. The invention has the advantages of reasonable mixture ratio, extremely high utilization ratio of aged garbage slag powder, low water absorptivity of the haydite, low cost and high strength; and the haydite satisfies the requirements in Chinese standard 'Light-weight Aggregate and Test Method thereof, Part 1: Light-weight Aggregate' GB / T17431.1.

Description

technical field [0001] The invention relates to the technical fields of environmental protection, comprehensive utilization of resources and building materials manufacturing, in particular to a kind of stale garbage slag powder ceramsite using stale garbage slag powder with a particle size of less than 20 mm as the main raw material and coal powder as the secondary raw material and its manufacturing method. Background technique [0002] Since the reform and opening up, the government of our country has attached great importance to the treatment and management of urban waste, prohibiting waste incineration and random disposal, and adopting the method of centralized landfill. More than 20 years later, my country's national policy of reform and opening up has achieved great development that shocks the world. In particular, the process of urbanization is extremely fast, and the city continues to expand outward. The original landfill is now an urban area, and the former must be r...

AI Technical Summary

Problems solved by technology

At first, it was mistakenly thought that it could be used as a garden or agricultural fertilizer, but later it was found that there were two major problems: first, from the perspective of chemical composition, the stale garbage slag powder with a particle size of less than 20mm contains harmful chemicals such as nitrates and heavy metals, which are harmful to the environment. Soil and groundwater resources are seriously polluted. According to authoritative organizations, 1 ton of garbage pollutes at least 5 tons of groundwater. Second, from the perspective of material form, stale garbage powder with a particle size of less than 20mm contains gravel, sand, bricks, and hard plastics. Crushed glass, broken ceramics, broken cinders, broken plastics, various metals, etc., accounted for 48% of the total, sieved with a 0.6mm square hole sieve, and the sand content of the powder at the bottom of the sieve accounted for 49%. It is not suitable for the growth of plants and crops at all, and it is very harmful to the soil

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