包钢石灰石型碱性球团试验研究

Experimental Study on Basic Pellet with Limestone of Baotou Steel

针对白云鄂博铁精矿的特殊性,研发出了配加75%白云鄂博铁精矿的低还原膨胀率的石灰石型碱性球团矿,建议包钢链篦机—回转窑—环冷机工艺生产碱性球团矿膨润土配比为1.5%~1.8%,碱度为1.15±0.05,石灰石配比为3.5%~3.8%,摸索了碱性球团矿获得良好的抗压强度、矿物组成及冶金性能的工艺制度,可为包钢链篦机—回转窑—环冷机生产碱性球团矿提供技术支持。

The basic pellet with limestone and low reduction expansion rate added 75% Bayan Obo iron concentrate is researched and developed aiming at the special nature of Bayan Obo iron concentrate. It is suggested that the proportion of bentonite is 1.5%~1.8%, alkalinity is 1.15±0.05 and proportion of limestone is 3.5%~3.8% for producing basic pellet with the process of chain grate machine-rotary kiln-ring cooler of Baotou Steel as well as explored the basic pellet is with such process system as good compressive strength, mineral composition and metallurgical properties, which could provide the technical supports for producing it with chain grate machine-rotary kiln-ring cooler of Baotou Steel.