冀东鞍山式磁铁矿磨矿动力学研究
发布时间：2019-05-01 07:05
【摘要】：通过对冀东鞍山式磁铁矿进行不同磨矿时间下磨矿产品粒度分布试验,研究其磨矿动力学行为。研究表明:通过对粒度范围内多个窄粒级动力学常数的曲线拟合,获得的磨矿动力学方程式对不同磨矿时间下筛上累积产物含量的预测精度较高;磨矿过程中,当磨矿细度大于1 mm时,冀东鞍山式磁铁矿磨矿动力学参数k值随磨矿粒度减小而变小的变化趋势与矿粒越细裂纹越少、磨矿越困难的规律是一致的,而当磨矿细度为-1+0.5 mm粒级时,存在对硬度较低、较易磨的磁铁矿和辉石的优先选择性粉碎,所以为避免过粉碎、节约磨矿成本,在该类矿石选矿时应采用阶段磨矿阶段选别工艺,将单体解离的磁铁矿及时选出。
[Abstract]:The grinding kinetic behavior of Anshan magnetite ore in eastern Hebei Province was studied by means of particle size distribution tests of grinding products at different grinding times. The results show that the obtained grinding kinetic equation can predict the cumulative product content on the screen at different grinding times by curve fitting of several narrow particle size kinetic constants within the grain size range. In the grinding process, when the grinding fineness is greater than 1 mm, the variation trend of the grinding dynamic parameter k of Anshan type magnetite in East Hebei Province decreases with the decrease of grinding grain size, and the law that the finer the grain crack is, the more difficult the grinding is. When the grinding fineness is-10.5 mm, there exists preferential grinding of magnetite and pyroxene, which have lower hardness and easier to grind. Therefore, in order to avoid over-crushing and save grinding cost, the grinding cost of magnetite and pyroxene is reduced. In the mineral processing of this kind of ore, the stage grinding stage separation process should be adopted, and the magnetite separated from the monomers should be selected in time.
【作者单位】： 华北理工大学矿业工程学院;河北省矿业开发与安全技术重点实验室;华北理工大学轻工学院;
【基金】：国家自然基金(51374087)
【分类号】：TD921.4;TD951
本文编号：2469102
[Abstract]:The grinding kinetic behavior of Anshan magnetite ore in eastern Hebei Province was studied by means of particle size distribution tests of grinding products at different grinding times. The results show that the obtained grinding kinetic equation can predict the cumulative product content on the screen at different grinding times by curve fitting of several narrow particle size kinetic constants within the grain size range. In the grinding process, when the grinding fineness is greater than 1 mm, the variation trend of the grinding dynamic parameter k of Anshan type magnetite in East Hebei Province decreases with the decrease of grinding grain size, and the law that the finer the grain crack is, the more difficult the grinding is. When the grinding fineness is-10.5 mm, there exists preferential grinding of magnetite and pyroxene, which have lower hardness and easier to grind. Therefore, in order to avoid over-crushing and save grinding cost, the grinding cost of magnetite and pyroxene is reduced. In the mineral processing of this kind of ore, the stage grinding stage separation process should be adopted, and the magnetite separated from the monomers should be selected in time.
【作者单位】： 华北理工大学矿业工程学院;河北省矿业开发与安全技术重点实验室;华北理工大学轻工学院;
【基金】：国家自然基金(51374087)
【分类号】：TD921.4;TD951
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