RESEARCH METHODS OF FOAM PHOSPHOGYPSUM BLOCKS BASED ON PHOSPHORUS FERTILIZER WASTE

The materials needed for the production of foam phosphogypsum consist of gypsum, phosphogypsum waste, water, foaming agent. These materials must meet standards for use. Today, several methods of foam phosphogypsum production are common. Let's kill. In this method, first gypsum paste or phosphogypsum waste is prepared, then special foam prepared in a foam generator is added to it. The mixture in the concrete mixer is mixed with foam and a mixture of foam concrete is obtained, which later hardens to form foam phosphogypsum. This method can be called the most used and reliable. For this method, organic foaming agents, a mixture with improved components and special foam generators are usually used. Dry mineralization. In this method, a foam phosphogypsum mixture is obtained from a generator by combining low-performance foam with dry components. At the same time, a stable foam phosphogypsum mixture with a small amount of free water is formed. Small particles of the solid phase settle on the surface of foam bubbles. This method is used in continuous foam concrete production technology. For this method, SDO foam generator, foam foam generator and special mixers are used. Barotechnology. With this method, foam phosphogypsum is obtained under excess pressure of all raw material components. First, water with a foaming agent is poured into the stabilizer, then all additives are added. After that, the air is sent to the air mixer with a compressor and the internal pressure is created. Foam phosphogypsum mixture is produced in a foam mixer, sent under pressure from the mixer to the mold or monolithic construction. For this method, synthetic foaming agents and stabilizers are used