离心式选粉机的高效改造

1改造原因和动机 我厂有4台φ3.5m型离心式选粉机,生料制备、水泥制成各2台,选粉一直在45%～50%之间的较低水平徘徊.循环负荷过大,导致磨机时产不高,φ2.2m×6.5m磨机,生料时产在20t/h左右,水泥时产在14t/h左右.近几年来,我厂一直在探索如何改进影响离心式选粉机选粉效率的几个主要因素(选粉机理及选粉机内部结构).经过科学分析、论证和研究,比较和借鉴旋风式选粉机机理的优点,进行了简单易行的旋风选粉的高效改造.     

废镍触媒的综合利用

本文采用酸溶，除渣，分离及蒸发浓缩，冷却，过滤等操作步骤从废镍触媒中回收有实用价值的硫酸镍，硫酸镁晶体，其回收率分别为75％和90％，经济效益也比较好。     

废镍触媒的综合利用

本文采用酸溶,除渣,分离及蒸发浓缩,冷却,过滤等操作步骤从废镍触媒中回收有实用价值的硫酸镍,硫酸镁晶体,其回收率分别为75%和90%,经济效益也比较好.     

有机酸化学清洗在化肥厂的应用

论述了有机酸在化肥装置上化学清洗的原理,介绍了有机酸化学清洗的工艺流程和工艺参数。     

Computer-aided design and experimental investigation of a hydrodynamic device: the microwire electrode

The development and application of a new electrochemical device using a computer-aided design strategy is reported. This novel design is based on the flow of electrolyte solution past a microwire electrode situated centrally within a large duct. In the design stage, finite element simulations were employed to evaluate feasible working geometries and mass transport rates. The computer-optimized designs were then exploited to construct experimental devices. Steady-state voltammetric measurements were performed for a reversible one-electron-transfer reaction to establish the experimental relationship between electrolysis current and solution velocity. The experimental results are compared to those predicted numerically, and good agreement is found. The numerical studies are also used to establish an empirical relationship between the mass transport limited current and the volume flow rate, providing a simple and quantitative alternative for workers who would prefer to exploit this device without the need to develop the numerical aspects.     

改善Se—Cu系钢铁常温发黑剂的使用效果

论述Se-Cu钢铁常温发黑剂在推广使用中遇到的一些问题，作了理论探讨，提出相应对策，并研制了HD钢铁常温发黑剂和新型防锈钝化水。     

铝合金中镁的快速测定

本文介绍了一种快速测定铝合金中镁含量的方法，不需分离和采用DDTC，过程简单，快速准确度较高。     

SR型工程流量计在煤气出厂计量中的应用

煤气出厂流量的准确测量是老大难问题。出厂煤气计量不准确会给企业和用户带来巨大经济损失,因此,准确计量煤气出厂流量是煤气生产厂迫切需要解决的问题。     

近距离下部煤层回采巷道合理位置确定

为研究燕子山矿近距离下部煤层回采巷道的布置,通过理论计算对上部4号煤层4216、4218双侧采空遗留区段煤柱建立力学模型,明晰遗留区段煤柱主应力差在其底板的传递规律;应用FLAC3D数值软件模拟上部区段遗留煤柱在底板不同深度垂直应力、水平应力及主应力差的分布特征,分析了主应力差与应力降低区因素对巷道合理内错距离的影响。结果表明,巷道应布置于低主应力差环境,避开主应力差峰值区域,下煤层水平距离上部煤柱边缘30 m位置时,垂直应力接近原岩应力,平均主应力差值小于1.24 MPa,且主应力差变化率较低;最终确定下煤层工作面回采巷道采用内错30 m布置。现场实践证明,在该错距下巷道围岩变形较小,能够保证矿井安全、高效生产。