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Through the sintering pot test, the effects of coke breeze ratio, sinter mixture moisture, sinter mixture basicity and material bed depth on NO_x emission were studied. The results show that reducing the ratio of coke breeze is beneficial to reducing NO_x emission under the condition of certain sintering time and not affecting the quality of sinter. At the same time, adopting low moisture and deep bed sintering can also achieve the purpose of reducing NO_x emission. The basicity of sinter mixture has little effect on NO_x emission.