摘要
采用“两段式”焙烧新工艺，即利用悬浮态焙烧技术在预反应器中脱除辉钼矿精矿中的大部分硫，然后在回转窑内脱除残余硫，在试验室模拟悬浮态装置中考察焙烧温度、焙烧时间等参数对脱硫效果的影响以及钼精矿的预反应过程。结果表明，相对于焙烧时间而言，焙烧温度对残硫量的影响相对较小；在脱硫率≤80％时，绝大部分氧化钼以MoO2形式存在，不会产生MoO3大量升华损失的情况；在焙烧温度700～780℃、物料停留时间1～3S时，悬浮态焙烧技术可以实现50％以上的表观脱硫率；相对于堆积态焙烧，脱硫效率大大提高。
The pre-reaction process of molybdenite and effects of roasting temperature and time on desulfu- rization rate of molybdenite in simulated suspension roasting device in laboratory were studied by ＂two-sta- ges roasting process＂, i. e. , most of the sulfur was removed in device by suspension roasting and the resid- ual sulfur was removed in rotary kiln. The results show that with the desulfurization rate of ≤80%, the majority generation is MOO2. In suspension pre-reaction test device, the apparent desulfurization rate of molybdenite is above 50% in conditions of suspension roasting temperature of 700-780℃, and remaining time of 1 - 3 s. The desulfurization efficiency is greatly improved compared to accumulation roasting process.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2013年第9期36-40,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家科技支撑计划项目(2012BAA08B00)
关键词
辉钼矿
悬浮态焙烧
预反应
表观脱硫率
molybdenite
suspension roasting
pre-reaction
apparent desulfurization rate
