Phosphogypsum non-sintered ceramsite light aggregate and preparation method thereof

A method of preparing a phosphogypsum non-sintered ceramsite light aggregate, wherein the method comprises the following steps:

• S1:
• putting phosphogypsum, mineral powder, and cement into a mixer according to a weight percentages and mixing uniformly;
• wherein the mixture has weight percentages of phosphogypsum 80-90%, mineral powder 3.3-10%, cement 6.5-10%;
• S2:
• granulating the uniformly mixed raw materials with adding water to produce phosphogypsum ceramsite balls, wherein a granulation equipment has an inclination angle of 60-82° , and the water is added at a rate of 1.25-1.5 L/min;
• the water has a weight of 17% of total weight of the mixture;
• S3:
• performing an initial setting and a final setting of the phosphogypsum ceramsite balls produced in S2 at 15-30° C.;
• wherein the initial setting time is 12-20 h and the final setting time is 24-36 h;
• curing for 14-28 days by using water immersion or continuous sprinkling water after the initial setting and final setting;
• S4:
• transferring the phosphogypsum ceramsite balls produced in S3 to a site with dust-proof facilities for stacking, and drying naturally until a moisture content of the phosphogypsum ceramsite balls is not more than 8%;
• S5:
• crushing the phosphogypsum ceramsite balls to a particle size of 10-40 mm to obtain the phosphogypsum non-sintered ceramsite balls light aggregate;
• S6:
• sieving and classifying the phosphogypsum non-sintered ceramsite balls light aggregate, and storing according to classification.