石灰是制造矽酸盐水泥的一种主要原料,也是重要的建筑材料之一,它的用途极为广泛。我们厂每日生产水泥需石灰10吨以上,最初用山上的杂柴烧土窑(注一),每个月一个土窑可以生产石灰20多吨,成品率在90%以上。将窑身结构改变后烧煤(型式和现在的明火窑相似,仅无炉齿,烧窑方式是先点火后装窑),每个月一个窑可以生产石灰40多吨,但成品率降低了,仅为80%左右。根据这种情况,要保证每 Lime is a major raw material for the manufacture of phthalic acid cement, and it is also one of the important building materials. Its use is extremely extensive. Our factory needs more than 10 tons of lime per day for cement production. Initially, we use a hilly mixed wood-burning earth kiln (Note 1). Each earth kiln can produce more than 20 tons of lime every month, and the finished product rate is over 90%. After changing the structure of the kiln, the coal is burned (similar in style to the present open fire kiln. There are only no furnace teeth, and the kiln is ignited and then kiln installed). One kiln per month can produce more than 40 tons of lime, but the yield is reduced. Only about 80%. According to this situation, we must ensure that every