摘要
研究陕西某地钾长石矿作为水泥生产原料,利用水泥煅烧时的高温使K2O挥发,进而收集作为钾肥,同时制得合格水泥熟料。本文主要研究了高温煅烧钾长石矿配制的水泥生料K2O的挥发率。研究结果表明:钾长石原矿中K2O的挥发率随着煅烧温度升高而升高,但相对挥发率较低,1450℃×2 h煅烧,挥发率小于10%。水泥配料中K2O的挥发率明显高于原矿的K2O的挥发率,经1350℃煅烧,水泥熟料中K2O挥发率高达89%以上。以钾长石为原料钾肥-水泥联产工艺K2O挥发再收集是可行的。
A potassium feldspar ore in Shaanxi is used as raw material to produce cement. During burning, K20 is volatile, and then collected as potash fertilizer meanwhile qualified cement clinker is produced. This paper mainly studies the K20 volatile rate by firing raw cement on high temperature. It is demonstrated that the evaporation rate of K20 in potassium feldspar ore increases along with the calcining temperature , but the elative volatility rate is low and volatilize rate is less than 10% by 1450 ~C x 2 h. The K20 evaporation rate in cement batching is significantly higher than in potassium feldspar ore. At 1350 ~C, the K20 evaporation rate of cement clinker is up to 89%. The conclusion is that it is viable to use potassium feldspar as raw material to realize potash-cement cogeneration by collecting the volatile K20.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第2期181-185,共5页
Bulletin of the Chinese Ceramic Society
基金
陕西省"13115"科技创新工程重大科技专项(2010 ZDKG-91)
关键词
钾长石
钾肥
水泥熟料
K2O挥发率
potassium feldspar
potash fertilizer
cement clinker
volatile rate of K2O
