Method for firing light ceramsite by utilizing river sludge and machine-made sand tailing mud

Abstract

The invention discloses a method for firing light ceramsite by utilizing river sludge and machine-made sand tailing mud, and relates to a preparation method of light ceramsite. The method solves the problem of environmental pollution caused by riverway sludge, machine-made sand tailing mud and other spoil, and the prepared product is green, environmentally friendly and high in additional value. The production process comprises the following steps: 1, pretreating river sludge and machine-made sand tailing mud; 2, drying the pretreated river sludge and machine-made sand tailing sludge; 3, mixing and preparing the dried river sludge, the machine-made sand tailing mud and an additive; 4, extruding the mixed material into a blank; and 5, sintering the ceramsite blank in a kiln. The light ceramsite is fired by taking river sludge and machine-made sand tailing mud as main raw materials. The environment pollution caused by the river sludge and the machine-made sand tailing mud is solved, resources are fully utilized, clay needed by traditional ceramsite preparation is replaced, land resources are effectively protected, and meanwhile the preparation cost is reduced. The fired light ceramsite has the characteristics of low water absorption, low density, high strength, good heat insulation effect and the like.

Description

technical field [0001] The invention relates to a firing method of lightweight ceramsite. Background technique [0002] The production process of machine-made sand inevitably produces a large amount of tailings. At present, the productivity of sand making equipment is between 15% and 35%, and no less than 4 billion tons of tailings will be produced nationwide every year. At present, more mature treatment technologies include roadbed backfilling and cement blending. These methods can treat about 50% of the tailings, and the remaining tailings can only be disposed of in landfills, which will cause natural disasters and waste of land resources. The other kind of raw material, river sludge, contains more impurities. Some bulky substances, hard substances, packaging bags and other impurities will cause damage to the sludge treatment device and affect its service life. At the same time, the cost of the existing sludge treatment device is relatively high, and the treatment effect ...

AI Technical Summary

Problems solved by technology

The current shortcomings are that the researched sludge firing ceramsite method basically uses machine-made sand tailings as a raw material additive, resulting in low sludge utilization; the fired ceramsite has problems such as high density and high water absorption. Greatly limit the application of ceramsite products and the development of ceramsite production enterprises