Green and High Efficiency Preparation of Silicon Fertilizer with Blast Furnace Slags
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摘要:
针对高炉熔渣含大量显热及粉煤灰中二氧化硅含量高的特点，进行高温炉熔渣混合加入粉煤灰制备高效硅肥研究。粉煤灰与熔渣按7.76：92.24质量比加入，经混合水淬后得到硅肥中有效硅含量最高，且随高炉熔渣温度升高，硅肥中有效硅含量提高，高炉熔渣温度为1 550℃，制备出高效硅肥有效硅含量达到22.4%，并提出高炉熔渣协同粉煤灰直接绿色制备高效硅肥技术。
Abstract:In view of the high content of silica in fly ash and abundant heat in blast furnace slag, high efficiency silicon fertilizer was prepared by mixing blast furnace slag with fly ash directly. When the fly ash and blast furnace slag were mixed with a mass ratio of 7.76:92.24, the effective silicon content in silicon fertilizer was highest after the condition of quenching. With increasing slag temperature, the effective silicon content in silicon fertilizer increased, and the effective silicon content of silicon fertilizer can reach up to 22.4% at the slag temperature of 1 550℃. Finally, the preparation technology for high efficiency silicon fertilizer with blast furnace slag and fly ash was raised.
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Key words:
- blast furnace slag /
- heat recovery /
- fly ash /
- silicon fertilizer
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表 1 高炉渣、粉煤灰化学成分及有效硅含量 /%
Table 1. Chemical composition of raw materials and effective silicon content
原料 CaO SiO2 Al2O3 MgO K2O 有效硅含量 高炉渣 43.03 35.92 11.99 5.35 0.62 15.14 粉煤灰 1.67 57.19 32.40 0.46 1.01 - 
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表 2 高炉渣和粉煤灰化学组成
Table 2. Chemical composition of blast furnace slag and fly ash
序号 R(碱度) 水淬高炉渣/g 粉煤灰/g a 1.20 100.00 0 b 1.09 98.39 1.61 c 0.98 92.24 7.76 d 0.89 86.74 13.26 e 0.82 81.79 18.21
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