Process for manufacturing xonotlite type calcium silicate heat insulation material

The invention relates to a process for manufacturing a xonotlite type calcium silicate heat insulation material. The heat insulation material comprises the following raw materials in percentage by weight: 2.3 to 2.7 percent of superfine quartz sand, 3 to 3.3 percent of active calcium hydroxide, 0.04 to 0.1 percent of silica sol, 0.3 to 0.5 percent of wollastonite, 0.1 to 0.3 percent of cotton fiber, 0.1 to 0.3 percent of glass fiber and 92 to 94 percent of water. The process comprises the following steps of: 1, raw material selection; 2, burdening; 3, slurry pre-reaction; 4, secondary addition; 5, active slurry synthesis of the xonotlite; 6, compression molding; and 7, drying, packing and warehousing. The heat insulation material has the advantages of light capacity, stable quality, high utilization rate of the raw materials, high finished product rate and the like.