Ardealite ceramsite with good filler effect and preparation method of the ardealite ceramsite

Abstract

The invention discloses ardealite ceramsite with a good filler effect. The ardealite ceramsite is prepared from, by weight, 30-60 parts of ardealite, 5-10 parts of clay, 5-15 parts of calcium carbonate kaolin, 2-5 parts of shale and 2-8 parts of acorn powder, wherein the clay is powder formed by mixing with aluminum sol according to the mass ratio of 1:(0.4-0.8) and then grinding the mixture. Experiments prove that the ardealite, the clay, the calcium carbonate kaolin, the shale, the acorn powder and the clay are mixed and ground by adopting alumina sol, then mixing, granulation and firing areperformed to obtain the ceramsite, the tap density of the ceramsite is 380-450 kg / m<3>, and the numerical tube pressure reaches 11.8-13 MPa.

Description

technical field [0001] The invention relates to the technical field of filler ceramsite, in particular to a phosphogypsum ceramsite with good filler effect and a preparation method thereof. Background technique [0002] Phosphogypsum is the main solid waste in my country's phosphate fertilizer industry, and its main components are dihydrate gypsum and hemihydrate gypsum. According to incomplete statistics, the total annual discharge of phosphogypsum in my country exceeds 55 million tons on a dry basis, and the cumulative stockpiles are 250 million tons. With the development of high-concentration phosphate fertilizers in China, the discharge of phosphogypsum will increase, which not only causes serious environmental pollution, but also becomes a major problem facing the sustainable development of the phosphorus chemical industry. Therefore, it is urgent to effectively deal with phosphogypsum. [0003] Ceramsite has a rich pore structure and a large specific surface area, an...

AI Technical Summary

Problems solved by technology

[0005] Phosphogypsum is used as a raw material to prepare ceramsite. Although some technical personnel have made appropriate research, there are relatively few research techniques for preparing ceramsite with phosphogypsum as the main raw material. Most of them combine phosphogypsum with other materials. The waste slag is mixed, and in the mixing process, the amount of phosphogypsum added is very small, which makes it difficult to alleviate the stockpiling of phosphogypsum in the ceramsite preparation industry; and, due to the properties of phosphogypsum itself, phosphogypsum is used as the main raw material for preparation There are many problems with ceramsite, such as too much phosphogypsum, which can easily lead to poor bulk density and cylinder compressive strength of prepared ceramsite products, resulting in shortened service life of ceramsite used as filler in sewage treatment process, And it is easy to cause secondary pollution to sewage discharge treatment