新型粉煤灰基絮凝剂的制备及应用

通过正交试验设计,发现在粉煤灰中加入少量硫铁矿烧渣和固体氯化钠,在１００℃左右的温度下用电镀厂盐酸酸洗废液搅拌浸取２－３小时,即制得集物理吸附与化学絮凝作用于一身的粉煤灰基絮凝剂。此絮凝剂用于不同废水的处理,其处理效果良好。     

Modeling and kinetics study of microwave heat drying of low grade manganese ore

During the industrial-scale smelting process of manganese ore, blast may occur due to the high moisture content of the ore, and drying pretreatment of the manganese ore is needed in the aspects of safety. In the present paper, microwave drying experiments were conducted under different particle size distributions and different microwave power conditions to explore the basic theory of microwave drying characteristics and kinetics of manganese ore, and the experimental data were fitted and analyzed by using thin-layer drying dynamics model. Results indicated that with the increase of the particle size and the microwave power of the manganese ore, the microwave drying rate increased, and accompanied with a promoting on the drying efficiency. For describing the microwave drying process of manganese ore, diffusion approach model was adopted among the commonly used thin-layer drying kinetic models. Based on Fick's second law, it can be seen that the surface diffusion coefficient increased from 4.27 × 10⁻¹³ m²/s to 8.24 × 10⁻⁸ m²/s with the increase of particle size from a particle size range of 0.012–0.095 mm to a particle size range of 4.2–5.0 mm. Clearly, the particle size has a significant influence on microwave drying efficiency.     

动载下矿岩-充填体能量传递规律及破坏特性

为研究嗣后充填采矿矿柱爆破回采时相邻胶结充填体内能量传递规律及破坏特性,利用霍普金森压杆装置,对矿岩与不同配比充填体组合试件进行单轴冲击实验。实验结果表明:能量传递过程中,大部分能量以反射波形式消散;随着应变率增加,吸能密度增大。同等吸能密度下,应变率■;冲击荷载下矿岩破碎形态呈简单块状。充填体破碎情况为,随应变率增加,呈块状分布减少,呈粉末状增多。当应变率在60 s^(-1)左右时,ZH330较ZH250与ZH180,充填体粉末状明显减少;计算充填体平均粒径与分形维数发现,随应变率增大,平均粒径减小,分形维数增加。实验研究对嗣后充填采矿矿柱回采爆破参数选择及胶结充填体保护具有一定意义。     

含砷金矿石工艺矿物学特征及其应用

通过典型实例分析,对含砷金矿石的工艺矿物学特征及应用进行了探讨,对金矿石除砷具有重要意义．     

对云南中低品位磷矿选矿的认识和建议

在磷精矿的富集中,提出了:中低品位胶磷矿浮选精矿品位富集与镁、硅及其他杂质脱除存在数量关系β=α+1.3×k1+0.42×k2+1.5%。     

矾山磷矿采用新型选矿设备和常温捕收剂

矾山磷矿属磁铁磷灰石大型矿山，可以综合回收磷精矿和铁精矿．由于近几年浮选药剂、工艺和设备的研制和改进，矾山磷矿选矿厂施工设计时选用了ＳＦ、ＪＪＦ型浮选机组和油隔离泵输送尾矿浆，并用Ｈ（９０７）、ＡＷ－０２常温捕收剂代替了氧化石蜡皂，都取得了节能、降耗的效果。     

磷石膏综合利用技术进展

本文介绍了在磷矿石生产磷酸时副产磷石膏的综合利用途径:提取镧系元素、作建筑材料以及制取硫酸联产水泥。建议我国制订磷石膏综合利用规划,开发综合利用新技术。     

低品位铜矿生产氧化铜的工艺研究

介绍一抑利用复杂组份的低品位铜矿生产氧化铜产品的工艺。此工艺适应的原料广泛，能充分利用铜矿资源，生产技术指标稳定，操作方便等特点。     

Electrochemical properties of apatite and other minerals of Zambian phosphate ores in aqueous solution

A microelectrophoresis technique was used to study the electrochemical properties of apatite, quartz and hornblende from Chilembwe phosphate ore;and apatite, calcite and magnetite from Kaluwe phosphate ore. The tests were conducted in distilled water and the water near the source of the phosphate ores under study.The apatite from Chilembwe gave an isoelectric point (i.e.p.) value of pH 6 in distilled water while in Mankwala Dam water the i.e.p. was of pH 4. Quartz and hornblende were negatively charged throughout the entire pH range studied in both cases. Apatite from Kaluwe showed an i.e.p. value of pH 3.8 while calcite and magnetite had i.e.p. values of pH 6.1 and 4.1 in distilled water, respectively. However, in Kaluwe water the i.e.p. of calcite shifted to pH 8.8 resulting in a charge reversal on either side of the i.e.p. There was no marked difference in the i.e.p. values of apatite and magnetite in Kaluwe water from those in distilled water. Comparison of zeta potential-curves for different apatites showed that they exhibit different i.e.p. values because of their variable composition.     

我国玻纤用叶蜡石和高岭土开发现状

叶蜡石是我国E玻璃纤维生产的主要原料.主要矿区在东南沿海的浙江、福建两省、目前已有三家专有矿粉厂加工生产,另有桐乡巨石、泰山玻纤集团自己的石粉加工厂,足可满足全国玻纤用量,2005年再扩展到60万t玻纤产量也能保证供给,而且还有正在开发的高岭土粉准备为玻纤生产服务.关键是各矿粉厂、玻纤厂如何选择优质叶蜡石粉保证长期、稳定的供贷渠道,以及如何注意矿粉的合理搭配使用,保证池窑拉丝的正常进行.