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云南省年产焦煤约180万t,其中70万t是由大、中型的机焦炉生产的,其余的几乎都分布在滇东北地区的宣威、富源、曲靖、师宗等四县的一百多个矿点,用锅底圆窑、马槽形方窑和堆烧式的偏坡窑土法炼制的。土法炼焦结焦率低,一般仅为50％以下,资源浪费大。我国南方煤炭资源较少,适合炼焦的煤就更少。云南省炼焦煤大多是低灰、低硫的主焦煤,其赋存条件差,煤层薄,地质构造复杂,顶底板破碎,煤层倾角大,瓦斯含量高,因而开采成本高。由此看来土法
Yunnan Province, with an annual output of about 1.8 million tons of coking coal, 700,000 tons of which is produced by large and medium-sized coke ovens and almost all of the remaining are located in one of the four counties of Xuanwei, Fuyuan, Qujing and Shizong of northeast Yunnan More than a hundred mine point, with the bottom of the pot kiln, manger-shaped side kilns and heap-burning side slope refining local refining method. Indigenous coking coke rate is low, generally only 50% or less, a waste of resources. There are fewer coal resources in southern China and less coal is suitable for coking. Most of the coking coal in Yunnan Province is low-ash, low-sulfur main coking coal, which has poor mining conditions, thin coal seams, complex geological structures, top and bottom crushing, large coal seam inclination and high gas content, which results in high mining costs. In this light, Tufa