High temperature reduced type composite fire coal sulfur fixing agent and preparation method thereof

The invention discloses a high temperature reduced type composite fire coal sulfur fixing agent and a preparation method thereof. The agent comprises a main agent, an auxiliary agent and water, wherein the weight percentage of the main agent CaO is 40 to 70 percent, the weight percentage of the auxiliary agents FeCl2, NaCl, Na2CO3 and triethanolamine respectively is 10 to 15 percent, 1to 5percent, 5 to 10 percent and 10 to 40 percent and the weight of the water is the sum of the weight of the main agent and auxiliary agents. When the agent is prepared, firstly the solids of the main agent andthe auxiliary agents are prepared into powders sieved through a 100-mesh sieve, CaO is hydrolyzed into Ca(OH)2 at a ratio of 1 to 1, Ca(OH)2 is dried and baked in a baking oven for 2 hours at a temperature of 5 DEG C more or less than 100 DEG C and is left for cooling, FeCl2, NaCl, Na2CO3 and triethanolamine are added in the cool Ca(OH)2 and the mixture is uniformly mixed, water having a same weight with the mixture is ad