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针对广西大厂锡石多金属硫化矿矿石,分别进行JK落重冲击破碎和传统颚式挤压破碎,再对两种破碎产物分别进行磨矿试验,并利用破碎能量模型,研究两种破碎方法对锡石多金属硫化矿破碎能耗的影响,并在Bond破碎功指数基础上,提出落重冲击破碎能耗模型。结果表明:与传统颚式挤压破碎相比,落重冲击破碎产物在细粒级中分布比重较小,在粗粒级中分布比重较大,且其产物形状比较均匀,多呈立方体状,而颚式挤压破碎产物形状比较杂乱,多呈针片状。一定磨矿时间内,磨矿时间与磨矿能耗呈正比例关系,JK落重冲击破碎产物的单位磨矿能耗低,两者最大能耗比为2.547倍,这说明对锡石多金属硫化矿采用冲击破碎方式更有利于节能降耗。
Aiming at the Cassiterite polymetallic sulphide ores in Dachang, Guangxi, the JK drop impact crushing and the traditional jaw crushing were respectively carried out. The two crushed products were respectively ground for grinding tests. The crushing energy models were used to study the crushing methods On the Cassiterite polymetallic sulfide ore crushing energy consumption, and based on the Bond broken work index, put forward the falling weight impact crushing energy model. The results showed that compared with the traditional jaw crushing, the falling weight of the impact crushed products in the fine-grained distribution of small proportion, coarse grained level in the distribution of a larger proportion, and the product shape is more uniform, mostly cubic-shaped, The jaw crushing product shape more messy, mostly needle-shaped. During a certain grinding time, the grinding time is directly proportional to the energy consumption of grinding. The energy consumption per unit of JK drop impact crushing products is low, the maximum energy consumption ratio of the two is 2.547 times, Mine using impact crushing more conducive to energy saving.