近年来 ,我国化肥行业面临严峻形式 ,不少企业陷入困境。因此 ,如何从国情出发 ,因地制宜 ,加快原料、产品、资本及营销结构调整 ,迎接日益严峻的挑战是化肥企业必须认真思考的问题。制氨原料有天然气、石脑油、渣油、石油焦和煤炭等 ,但其生产工艺和成本各不相同。从技术经济 In recent years, China’s fertilizer industry is facing a grim situation, many enterprises in trouble. Therefore, starting from the actual conditions of our country, we must speed up the adjustment of raw materials, products, capital and marketing structure in response to the actual situation and meet the increasingly serious challenges that fertilizer companies must seriously consider. Ammonia raw materials are natural gas, naphtha, residual oil, petroleum coke and coal, but its production technology and cost vary. From the technical economy