Technology for preparing ceramic tile from high-volume municipal water supply plant sludge

Abstract

The invention discloses a technology for preparing a ceramic tile from high-volume municipal water supply plant sludge, and belongs to the field of solid waste recycling and building material production in environmental engineering. The technology comprises the following steps of: uniformly mixing 38 to 42 mass percent of municipal water supply plant dewatering sludge powder (dry weight) with a certain grain size, 38 to 42 mass percent of kaolin and 16 to 24 mass percent of potassium feldspar powder, adding water which is about 20 percent based on the dry weight of the total material, uniformly mixing, and storing for certain time in a constant-temperature environment; and performing compression molding under certain pressure, raising the temperature from room temperature to 1,200 DEG C by a certain method and keeping temperature for one hour, and naturally cooling to the room temperature to obtain the finished product. Through detection, the main technical indexes meet the related national standard. By the technology, the water supply plant sludge is effectively utilized, and other brick production raw materials are substituted; and the technology has good environmental benefit and certain economic benefit.

Description

technical field [0001] The invention relates to a technology for recycling solid waste and production of building materials, in particular to a technology for preparing ceramic bricks from sludge from a high-volume urban water supply plant. Background technique [0002] With the continuous expansion of the city scale, the problem of sludge discharge in urban water supply plants has gradually emerged. The treated dewatered sludge is basically disposed of by landfill or incineration. Incineration technology and equipment are complicated, energy consumption is high, cost is high, and there is a problem of air pollution; landfill not only occupies a large amount of fields, but also pollutes groundwater and river water resources. And some foreign researchers have conducted relevant research on the toxicity of dewatered sludge from water supply plants. Studies have shown that aluminum precipitates will cause secondary pollution to the environment, especially the aqueous solution ...

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Problems solved by technology

In the above research, in the process of using water supply plant sludge to prepare bricks, construction aggregates, abrasives, ceramic industry raw materials, etc., the dosage is generally low, and the strength of the finished product is not high, and there is no domestic ceramic brick related to water supply plant sludge patent

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