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高村铁矿是马钢新设计的露天矿山,设计年产量500万吨。采场境界近似椭圆,南北长约1500米,东西宽约1200米。地势东北高,西南低。地表水的流向由东北向西南,地下水的流向和地面一致。地下水位也是北高南低,由 50米到 20米,个别地方 7米,平均地下水位 21米。需用机械排水的地表汇水面积为1,400,640米~2。地面一般标高 30米。该矿三面靠山,初期开采就要进入凹 相似文献
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Microstructure of electrodeposited RE-Ni-W-P-SiC composite coating 总被引:12,自引:3,他引:9
1 INTRODUCTIONThecompositeelectroplatingtechniqueasanewfunctionalplatingmethodisattractingpeople’satten tions,especiallytherehasbeenarapiddevelopmentintherecenttensofyears.Furthermore,mostcom positetechniqueshavebeenusedinindustries[1~ 6 ].Rareearth(RE)elem… 相似文献
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由于风向作用,使山坡自山脊被分成两部分:迎雨坡面和背雨坡面。迎雨面受雨点多,汇水量亦大。背雨面受雨点少,汇水量小,但在以往的一些资料里只提到这种现象,却没有进行定量分析,为了便于量的研究,现举例说明以上的问题: 相似文献
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Ni-W-P composite coatings reinforced by Ce O2 and Si O2 nano-particles on the surface of common carbon steels, were prepared by double pulse electrodeposition. The crystallization course was characterized by phase structures, crystallinity, grain sizes and microstructures. The results indicate that as-deposited composite coating is amorphous. Whereas it turns into the crystalline structure with 98.25% crystallinity, and Ni3 P, Ni2 P and Ni5P2 alloy phases precipitate from structures at 400 °C. Thereafter, Ni2 P and Ni5P2 metastable alloy phases turn into Ni3 P stable alloy phase at 500 °C. The crystallization course of the composite coating has finished when being heat-treated at 700 °C. The average sizes of Ni grains increase with the rise of heat treatment temperature from400 °C to 700 °C. Ce O2 and Si O2 nano-particles deposited into Ni-W-P alloys can delay the crystallization course and habit the growth of alloy phases. 相似文献
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硬锌真空蒸馏富集锗、铟的研究 总被引:1,自引:0,他引:1
锗、铟常赋存于铅,锌矿中。硬锌是火法冶炼铅锌过程中的副产物,其主要成分是铅、锌,常含锗、铟等。为综合回收其中的有价金属,用真空炉蒸馏出锌和锌铅合金,使锗、铟富集蒸馏残渣中,即得到锗(铟)精矿。硬锌真空蒸馏,在真空度66~106Pa,温度1000℃,恒温蒸馏40~100min,锗在残渣中的富集比为10.63~1520倍,直收率9726%~94.09%,铟的富集比大于9.5倍,直收率大于90%;电能消耗为1490~2000kWh/t硬锌。 相似文献