Sintering kiln

The invention specifically discloses a sintering kiln which comprises a furnace body, an oxygen inlet is formed in the bottom of the furnace body, a gas separation assembly is arranged above the furnace body, and the gas separation assembly comprises a draught fan communicating with the furnace body, a steam-water separator connected with the draught fan and a micro powder adsorption collector connected with the steam-water separator. The micro powder adsorption collector is communicated with the furnace body; the fan is communicated with the steam-water separator through a first pipeline, the first pipeline is vertically communicated with a second pipeline, the second pipeline is communicated with the furnace body, and the diameter of the first pipeline is larger than that of the second pipeline. According to the design of the sintering kiln, the returned oxygen keeps excellent cleanliness and high temperature, meanwhile, the oxygen in the kiln can be adjusted to flow uniformly, and the problems of product p