石灰石粒度对生料易烧性的影响

Influence of limestone particle size on raw meal burnability

控制生料中石灰石的不同比例的80μm筛余量和不同比例的200μm筛余量,在相同的试验条件进行生料易烧性试验,以研究石灰石粒度与易烧性的定量关系。实验研究表明:(1)随着石灰石颗粒80μm和200μm筛余量的增加,生料易烧性变差。(2)w(f-CaO)为1.50%时,石灰石颗粒80μm及200μm的筛余量分别是18.73%及2.07%,即80μm筛余量每增加1.00%,w(f-CaO)值就增加0.04%~0.06%;200μm筛余量每增加0.50%,w(f-CaO)值就增加0.20%~0.60%,因此,在生产中,必须严格控制200μm筛余量。(3)由杨德尔方程计算得到,w(f-CaO)为1.50%时石灰石的临界半径为60μm。

80μm sieve residue and 200μm sieve residue of limestone in raw material were controlled at different proportions, and raw meal burnability was tested under the same experimental condition to study the quantitative relationship between particle size and burnability. The result reveals as follows:(1) with the increase of 80 μm and 200 μm residue, burnability of limestone gets bad.(2) when w(f-CaO) is 1.5%, 80μm and 200μm sieve residue is 18.73% and 2.07%; and every 1.00% increase of 80μm sieve residu is related to 0.04%~0.06% increase of w(f-CaO), and every 0.50% increase of 200 μm sieve residue related to 0.20%~0.60% increase of w(f-CaO), so in real production, we should control 200 μm sieve residue strictly.(3) Derived from the Yang Deer Equation, when w(f-CaO) value is 1.5%, critical radius of limestone is 60 μ.