Preparation method of ceramisite filter material for water treatment

Abstract

The invention provides a preparation method of a ceramisite filter material for water treatment, comprising the following steps: naturally air-drying sewage sludge and water supply sludge; respectively grinding and smashing clay and the air-dried water supply sludge and sewage sludge, and filtering by using a sieve after smashing; detecting the percentage contents of SiO2, Al2O3, Fe2O3, CaO, MgO, K2O, Na2O and organic matters in the clay, the water supply sludge and the sewage sludge: detecting the following chemical components in powder after mixing, and if a following ratio is not reached, adding absent substances, so that a mixture meets a certain ratio as follows; adding water in the mixture, stirring until a sticky state is formed, and then putting into a ball forming mill for ball forming, wherein the addition amount of the water is 36-44 percent of the weight of the mixture; putting a pellet at a cool and ventilated place, and naturally drying for 24h; putting the pellet into a muffle furnace, adjusting the temperature to 395-405 DEG C, and preheating for 10min; heating up for firing, and keeping a constant temperature for 20min after the in-furnace temperature of the muffle furnace is increased to 1200 DEG C; after completely firing the ceramisite filter material, taking out the ceramisite filter material, and naturally cooling to room temperature.

Description

technical field [0001] The invention relates to a preparation method of ceramsite filter material. Background technique [0002] With the development of society and the continuous expansion of city scale, the amount of treated water in urban waterworks and sewage treatment plants is also increasing, and more and more water supply sludge and sewage sludge are produced. At present, a considerable part of sludge is mainly Some traditional methods are still used for treatment and disposal, including sanitary landfill, sea reclamation, incineration and so on. Landfill needs to occupy a large amount of land, so it is obviously not suitable for large-scale promotion; while discharge into the sea will harm the marine ecosystem and cause pollution without borders. The United States and EU countries have already banned sludge discharge into the sea; Higher, and prone to air pollution problems such as dioxin, so it is subject to greater restrictions. However, some other resource tech...

AI Technical Summary

Problems solved by technology

However, at present, the raw materials of domestic manufacturers to produce ceramsite are still mainly clay, the cost is high, and fertile land needs to be excavated