Chemical nitridation catalyst

The invention relates to a chemical nitridation catalyst which comprises the following components in proportion: 5 to 15 percent of calcium carbonate, 12 to 25 percent of sodium carbonate, 3 to 5 percent of calcium oxide, 10 to 30 percent of calcium chloride, 15 to 38 percent of ammonium chloride, 5 to 10 percent of rare earth carbonate and 10 to 15 percent of rare earth chloride. The seven compounds are uniformly mixed and put into a stainless steel pipe; two ends are plugged and locked by aluminium silicate fiber felts and spot-welded on the stainless steel pipe by stainless steel wafers; and the chemical nitridation catalyst is packaged every 200 grams and 300 grams. Discharged waste gas is reduced by about more than 52.5 kilograms, so that the environment is improved. The chemical nitridation catalyst is short in nitridation time and good in nitridation effect; electric energy is saved; a nitridation layer tissue is relatively thinned and dispersed; and the brittleness level, the nitride level and the loo