黄金矿山矿图制作中品位表的自动生成

利用AutoCAD强大的二次开发功能实现黄金矿山矿图品位表等各种明细表的绘制 ,不仅操作简单 ,而且表格美观。

某铁矿表外低品位矿与高品位矿配矿试验研究

为进一步充分合理地利用矿山资源,特别是有效利用低品位表外矿(品位约15%～18%),提高TFe、TiO2回收率,延长矿山开采年限,同时降低开采、运输以及选别成本,利用表外低品位矿与高品位矿合理配矿,通过预选粗粒抛尾工艺,获得了较好的技术指标。通过该工艺的实施,可以将废弃低品位表外矿变废为宝,提高了资源综合利用率,符合国家产业政策;同时也降低了采剥成本及运输成本。

浅谈城门山铜矿贫化率和损失率计算及管理工作

通过分析和计算矿石贫化率和损失率,利用盈亏点品位来优化该二率指标并综合回收低品位表外矿,为企业创造了巨大的经济效益。

室雅无须大

年初,我探访了一个普通的广州人的家。当我一踏进他家门,便立即被屋里的宽敞、明亮、别具特色的装修、柔和的色彩、极有个性的摆设吸引了。 主人用广味极浓的普通话介绍着这个令他自豪的家。他的布置方式虽然违背了厅房的一些设计原则,但还是相当合理地利用了房内的空间。 这套房子只有40平方米,原是一厅一房。

Relationship between process mineralogical characterization and beneficiability of low-grade laterite nickel ore

Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite,serpentine and chromite was studied on the basis of process mineralogy.The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic oxidized ore,with the main valuable elements of Ni,Co and Cr and the main mineral components of limonite,serpentine,chromite,etc.There is no independent carrier mineral of Ni and Co in the raw ore,and the occurrence states of Ni and Co are relatively dispersed.For the limonite in laterite nickel mine,the nickel bearing magnetite concentrate with nickel grade of 1.98%and recovery rate of 88.42%can be obtained by reduction roasting magnetic separation process.For the serpentine in laterite nickel mine,the cobalt bearing concentrate with Co grade of 0.17%and recovery rate of 23.17%can be obtained by positive and reverse flotation process.A chromium concentrate containing 35.17%Cr_(2)O_(3) and a recovery of 33.42%can be obtained by using the combined process of coarse and fine classification and gravity and magnetic.

An active pipe-embedded building envelope for utilizing low-grade energy sources

An active pipe-embedded building envelope, which is an external wall or roof with pipes embedded inside, was presented. This structure may utilize the circulating water in the pipe to transfer heat or coolth inside directly. This kind of structure is named ＂active pipe-embedded building envelope＂ due to dealing with the thermal energy actively inside the structure mass by circulating water. This structure not only deals with thermal energy before the external disturbance becomes cooling/heating load by using the circulating water, but also may use low-grade energy sources such as evaporative cooling, solar energy, and geothermal energy. In the meantime, this structure can also improve the indoor thermal comfort by tempering the internal wall surface temperature variation due to the thermal removal in the mass. This work further presents the thermal performance of this structure under a typical hot summer weather condition by comparing it with that of the conventional external wall/roof with numerical simulation. The results show that this pipe-embedded structure may reduce the external heat transfer significantly and reduce the internal wall surface temperature for improving thermal comfort. This work also presents the effects of the water temperature and the pipe spacing on the heat transfer of this structure. The internal surface heat transfer may reduce by about 2.6 W/mE when the water temperature reduces by 1℃ as far as a brick wall with pipes embedded inside is concerned. When the pipe spacing reduces by 50 mm, the internal wall surface heat flux can also reduce by about 2.3 W/m2.

采样设计数据处理与直方图的自动实现

为在采样设计时，做好矿石不同类型、不同品位区间样品的统计工作，笔者用采样设计数据处理系统实现了若干区间品位统计表、统计直方图的自动生成。本文对此进行了分析和说明。