共查询到20条相似文献,搜索用时 15 毫秒
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介绍了对氰化系统氰渣压滤机进行反洗改造和在实际生产中的应用情况,重点对反洗水量及反洗时间进行了分析和说明. 相似文献
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1 引言 济宁二号煤矿南、北翼带式输送机机头部分都设置在主井煤仓上口处,由于设备几乎满负荷运转,假如一台设备在生产中出现故障,则须立即上井检修,我矿以前采取的措施是在硐室拱顶设置工字钢梁和三角架,用电动葫芦吊起设备,将其运到有轨道的带式输送机的另一侧,因而,在工作中必须拆掉输送机支架的4条支腿,并将设备上的冷却管路及线缆等拆下. 相似文献
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袁子钢 《有色金属(矿山部分)》2008,60(4)
6月26日,湖南柿竹园有色金属有限责任公司控股的"湖南铋业有限责任公司"在郴州市经济开发区揭牌成立,湖南省国资委、郴州市委、市政府、湖南有色控股集团等政府与单位的领导出席揭牌成立仪式,中国钨业协会、北京矿冶研究总院等49家单位发来贺电.湖南铋业有限责任公司注册资本1.5亿元人民币. 相似文献
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Understanding the characteristics of drawing body shape is essential for optimization of drawing parameters in longwall top coal caving mining.In this study,both physical experiments and theoretical analysis are employed to investigate these characteristics and derive a theoretical equation for the drawing body shape along the working face in an inclined seam.By analyzing the initial positions of drawn marked particles,the characteristics of the drawing body shape for different seam dip angles are obtained.It is shown that the drawing body of the top coal exhibits a shape-difference and volume-symmetry characteristic,on taking a vertical line through the center of support opening as the axis of symmetry,the shapes of the drawing body on the two sides of this axis are clearly different,but their volumes are equal.By establishing theoretical models of the drawing body in the initial drawing stage and the normal drawing stage,a theoretical equation for the drawing body in an inclined seam is proposed,which can accurately describe the characteristics of the drawing body shape.The shape characteristics and volume symmetry of the drawing body are further analyzed by comparing the results of theoretical calculations and numerical simulations.It is shown that one side of the drawing body is divided into two parts by an inflection point,with the lower part being a variation development area.This variation development area increases gradually with increasing seam dip angle,resulting in an asymmetry of the drawing body shape.However,the volume symmetry coefficient fluctuates around 1 for all values of the seam dip angle variation,and the volumes of the drawing body on the two sides are more or less equal as the variation development volume is more or less equal to the cut volume.Both theoretical calculations and numerical simulations confirm that the drawing body of the top coal exhibits the shape-difference and volume-symmetry characteristic. 相似文献
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我叫李学义,是山东丰源煤电股份有限公司赵坡煤矿运搬工区上井口翻罐笼处的一名拥车工。我的小腿上有一块10厘米长的伤疤,那是我心中永远的痛。 相似文献
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中国人民银行于2011年2月8日晚间突然宣布:自2011年2月9日起上调金融机构人民币存贷款基准利率,金融机构一年期存贷款基准利率分别上调0.25个百分点,这是自金融危机以来中国第三次加息。 相似文献
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大冶公司稀贵金属厂采用半湿法工艺处理铜电解阳极泥,对四种从氯化银中提取银的方法进行了比较研究,从直收率、质量等方面考虑,选择了水合肼还原法,银转化率>99%,银回收率>98.6%. 相似文献
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矿浆中的难免离子对黄铜矿和方铅矿浮选的影响 总被引:3,自引:0,他引:3
通过分析去离子水浸泡矿石后矿浆中的难免离子组成,研究矿浆中发生变化较大的Ca2 ,Mg2 ,Fe2 ,Fe3 ,Cu2 ,Zn2 和AP 等离子对黄铜矿和方铅矿浮选的影响.发现这些金属离子在用乙基硫胺酯做捕收剂的体系中对黄铜矿的浮选基本没有影响,而对方铅矿浮选的影响分成3类,起活化作用的Cu ,起抑制作用的Al3 ,Fe2 ,Zn2 ,和Cu2 以及基本不起作用的Mg2 和Ca2 .对阳离子的抑制机理进行了探讨. 相似文献