铝电解质温度间歇式在线测量

介绍了最新研制成功的一种测温装置。该装置是在线安装测温工作是间歇式的 ,测温动作是自动完成的 ,从而解决了铝电解质温度的测量问题 ,为开发以实现电解槽热平衡为目标的新一代控制软件 。

铝电解质温度和分子比的模糊专家控制

建立了一种新的模糊专家决策系统 ,用来解决一类复杂对象的控制问题。系统核心是基本模糊控制器和模糊专家决策规则。为了提高系统的鲁棒性 ,采用了基于可信度因子的不精确推理机制。以此专家系统为平台 ,开发了电解铝过程中氟化铝添加的模糊专家系统 ,控制电解质温度和分子比。实际应用表明 ,该模糊专家决策系统能满足控制要求 ,达到了节能降耗的目的。

基于CAN总线网络铝电解槽电解质温度装置的设计

介绍1种基于CAN总线网络铝电解槽电解质温度的装置设计,详细地阐述该装置的设计特点、系统组成及实现的功能。

网络式铝电解质测温装置的研究与应用

研究开发了一种网络式铝电解质温度检测装置 ,能直接将生产现场利用镍铬 -镍硅热电偶测得的温度数据进行自动存储 ,通过CAN总线网络方式从现场批量发送到上位机和相对应槽控箱上 ,实现数据的共享。本文介绍了这种测量铝电解槽电解质温度的专用装置的结构、特点、功能与应用效果。

Coupled heat/mass-balance model for analyzing correlation between excess AlF_3 concentration and aluminum electrolyte temperature

The influence of aluminum electrolyte component on its temperature is an important issue within the field of aluminum reduction with pre-baked cells. The characteristic correlation between excess AlF3 concentration and aluminum electrolyte temperature was explored through the modeling of heat and mass transfer processes in industrial pre-baked aluminum reduction cells. A coupled heat/mass-balance model was derived theoretically from the mass and energy balance of an electrolysis cell, and then was simplified properly into a practical expression. The model demonstrates that if environmental temperature and Al2O3 concentration keep constant, the excess AlF3 concentration decreases with the aluminum electrolyte temperature linearly and its decrease rate is dependent on the heat transfer property of aluminum electrolyte, side wall and cell shell. Secondly, experiments were conducted on site with two industrial cells in an aluminum electrolysis plant. Excess AlF3 concentration and aluminum electrolyte temperature were obtained simultaneously together with other parameters such as Al2O3, CaF2, MgF2 and LiF concentrations. Results show that the maximum absolute error between the tested value and the calculated value of excess AlF3 concentration using the proposed model is less than 2%. This reveals that the coupled heat/mass-balance model can appropriately characterize the correlation between excess AlF3 concentration and aluminum electrolyte temperature with good accuracy and practicability.

发明与专利

一种测量铝电解质温度和初晶温度的双传感器探头 一种测量铝电解质温度和初晶温度的双传感器探头，包括探头Ⅰ和探头Ⅱ，每个探头由一个温度传感器和一个保护套管组成：温度传感器的上部固定在保护套管内：其中探头Ⅰ的底部固定有一个取样室．取样室由中间槽和测量筒组成，中间槽内壁上方与探头Ⅰ的保护套管外壁相配合并吲定在一起：中间槽和测量简之间设有通道，探头Ⅰ的传感器通过该通道插入测量筒内。