复杂含银砷硫化铜矿浮选试验对比研究

针对云南某含银砷的硫化铜矿,查明了化学多元素、矿物组成、嵌布粒度和单体解离度等工艺矿物学特性,对比了混合浮选和等可浮选两种方案的选别指标。结果表明,在原矿铜、砷、银品位分别为0.41%、1.82%、16.24g/t条件下,等可浮选方案获得了铜品位为22.11%,铜回收率为66.32%的铜精矿,其中砷含量为0.45%,银品位和银回收率为438.48g/t、33.21%;混合浮选方案获得了铜品位为20.14%,铜回收率为75.14%的铜精矿,其中砷品位为0.81%,银品位和银回收率分别为413.75g/t、38.98%。混合浮选方案比等可浮选方案获得的选别指标要好,但砷含量较高。由此可以看出,铜精矿中砷品位与铜、银回收率呈同步升降关系。     

某钨铜多金属共生矿资源综合利用研究

针对某钨铜矿脉石成分以磁黄铁矿、含硅矿物及萤石为主,精矿品位难以提高的难题,采用"铜硫混选-铜硫分离"流程,配合高效浮选药剂的研发,在原矿铜、银品位分别为0.382%和12.33g/t的情况下,获得了铜品位21.75%,铜回收率89.39%,银含量442.35g/t,银回收率56.33%的含银铜精矿。与此同时,在原矿WO_3品位为0.181%的情况下,采用"磁选抛尾-常温钨粗选-加温钨精选"流程,配合高效钨捕收剂GY-10的使用,获得了WO_3品位为62.04%,WO_3回收率为71.98%的钨精矿,实现了钨铜共生矿资源的综合利用。     

Comparative Analysis of Experiment Treating Benzene and CEES by Pulse Corona Plasma

Based on an experiment treating benzene and 2-chloroethyl ethyl sulfide （CEES） by pulse corona induced-plasma, the simiarities and differences found in the experimental data and analytical results are analyzed in a comparative manner in this paper. The theory applied is also discussed.     

Experiment and Analysis on the Treatment of Gaseous Benzene Using Pulsed Corona Discharge Plasma

An experiment and analysis on removal of gaseous benzene by pulse corona inducedplasma is presented in this article. Important parameters effecting removal efficiency have been investigated, such as pulse peak voltage, pulse frequency, gas inlet concentration, gas flow rate and reactor temperature. The result shows that the removal efficiency increases with the increase in pulse peak voltage, pulse frequency and reactor temperature, but decreases in the rise of gas inlet concentration and gas flow rate. On the condition of Vp = 36 kV, f = 80 Hz, C = 1440 mg/m^3 and Q = 640 ml/min, the largest removal efficiency is 98%. Finally, the reacted products are qualitatively analysed and the reaction processes are deduced in combination with plasma-chemistry theory.     

热带果树的风采:油梨

油梨(Persea americana),樟科油梨属植物,又名鳄梨、酪梨、牛油果。多年生常绿乔木,实生树高10～20米,嫁接树高约10米,经济寿命为40～50年。主根深,侧根垂直分布,多在地表1米以内,没有根毛,根尖有根菌共生。树体主干明显,直立,树皮较厚,灰褐色或深褐色。枝条开展,松脆易断,呈暗褐色,光滑无毛。单叶互生,革     

原油蒸馏塔汽液负荷软仪表的开发及应用

开发了原油蒸馏塔内部汽液负荷软测量的通用软件，在软件的开发过程中，重点考虑了原油蒸馏塔的一般性特点和工程实用性，并采用了模块化结构，因而所开发的软仪表对这一类塔的计算具有很大的通用性和可移植性，该软件已在一个复杂的常压塔上进行了实施，在线结果满足工业控制的要求。