Flow of gas-liquid-solid system and its application in packed flotation column

A packed flotation column, which is packed with multiple board ripple packings, was described. Based on comprehensive steady state models, chemical reactor developed previously in chemical engineering subjects, have been extended to packed flotation column for mineral separation. The experimental results verify that tarts in series model is better than axially-dispersed plug flow model to describe flow pattern in the collection zone of column by RTD (residence time distribution), and the error of experimental data and calculated data of both models are 0. 07 % - 0. 1% and 0. 18 % - 0.45 % respectively. And, RTD of gas phase was also considered, results also show that gas in the whole column appears plug flow. The cleaning process through adding wash water in froth zone of column was described, and the effect of superficial air vdodty and superficial wash water vdocity on the cleaning action of froth zone were discussed. Flotation experiment for single column was conducted for phosphate ores. The recovery for P2Os was 85.8%, and the grade was 26.8%.     

互联网股泡沫不等于互联网泡沫

最近互联网股有点热闹,有人又认为是泡沫,互联网股出现泡沫是难免的,但这不等于互联网泡沫。互联网的基本面是好的。中国概念股近期全面下挫,纳斯达克中国指数单周下跌近9%,大部分的     

DIY 不到50元超强散热底座!

现在的本本性能越来越强,高清播放、玩游戏,即便就算是上网,也是有负荷地工作着。双核+独显用的时间一长,底部就感觉特别热,放在腿上简直就是受罪。再看看系统温度,老天!显卡核心90多度,这还不煮鸡蛋了?     

对油水乳浊液分离的研究

本文主要研究了操作条件的改变对分离效果的影响，在研究中还考察了NaCl和絮凝剂加入乳浊液后对分离过程产生的增效作用。得到了一个与实验数据相关联的数学方程，为估算油的去除率提供了一个有用的工具。在电浮选装置中采用不溶电极，为今后的分离技术提供了一个新思路。     

民用建筑设计中几个消防问题分析

分析了民用建筑设计中遇到的如I类地下汽车库泡沫喷淋流量,两个消防水池共用吸水管的连接方式,消防水池的保护距离等问题,提出解决办法,供消防设计参考。     

泡沫阻力因子和残余阻力因子预测模型

在均匀实验设计的基础上,通过spss软件,用逐步回归的方法拟合泡沫阻力因子和残余阻力因子与注入速度、渗透率、气液比、注入量和起泡剂浓度之间的关系式。     

Oxidation behaviors of Ni-Cr-Al superalloy foams at 1 000 ℃ in air

The oxidation behaviors of Ni-16Cr-xAl （x=4.5%, 9.0%, mass fraction） superalloy foams in air at 1000℃ were investigated. The effects of AI content on the resistance to high temperature oxidation were examined. The oxidation mechanisms of the foams were discussed. The results show that the resistance to the oxidation of the Ni-16Cr-xA1 based alloy at 1 000 ℃ increases with the content of A1 increasing from 4.5% to 9.0%. Complex oxide products are formed on the surface of the superalloy foams after the oxidation. Cr203 and A1203 are the predominant oxides for the scales of the foams with 4.5% A1 and 9% A1, respectively. Excellent high temperature oxidation resistance and superior pore conformation stability for the Ni-16Cr-xA1 based superalloy foam with 9% A1 can be mainly attributed to the formation of relatively continuous and protective A1203 oxides on the surface of the foam.     

细粒径磷矿中硅钙质脉石成分的浮选分离

采用反浮选法以油酸盐和烷基胺盐为捕收剂分别除去细粒径磷矿中的碳酸盐和硅质脉石以提高矿石的品位。结果表明:不管是对油酸盐反浮选捕收方解石,还是胺盐反浮选捕收硅石,增加体系的酸性都有利于提高矿石的品位,还能明显提高前者的P2O5回收率。增加捕收剂用量同样可提高矿石品位,但却减少了P2O5回收率。对于2种反浮选过程较适宜的捕收剂用量为0.5 kg/t。抑制剂的添加有利于提高2种反浮选的效果,优化后的抑制剂用量为3.5kg/t。     

金矿矿石可选性试验研究

对我国某金矿矿石进行浮选可行性试验研究,通过研究得到了精矿石粗选和精选的最佳工艺数据,为该矿山选厂设计提供了必要的浮选试验数据。     

泡沫玻璃窑炉温度控制系统的设计与应用

针对泡沫玻璃生产线窑炉温度控制的工艺要求,设计并应用了P L C温度控制系统、P I D控制算法。现场应用表明,该系统运行稳定可靠,设计先进,界面友好,控制精度高,具有较高的实用价值,从而保证了产品的质量,降低了能耗,提高了企业竞争力。