砂状氧化铝

砂状氧化铝半工业试验生产线的工艺设计

Technical Design of the Semi-industrial Prototyping Production Line for Sand-like Aluminum Oxide

自20世纪70年代Alcoa开发出以砂状氧化铝为吸附剂的干法脱氟技术，在全世界铝行业得到迅速推广和提高以后，砂状氧化铝的生产就成为氧化铝厂的主要研究方向。

Because the dry de-fluorination technology using sandy alumina as absorbent , developed by Alcoa in 1970s , has been spread and improved in aluminum industry in the whole world , the sandy alumina production has become one of the main trends in alumina refineries .

分解过程降温制度对产品砂状氧化铝强度及分解率的影响

The effection of the decomposition temperature in sandy alumina production

高固含铝酸钠溶液生产砂状氧化铝技术

Production of Sandy alumina by a High solid Content Precipitation

砂状氧化铝在铝电解中的应用及其生产技术探讨

Discussion on Application of sandy alumina in aluminium electrolysis and its processing technology

烧结法生产砂状氧化铝的理论与工艺研究

Study on the Fundamentals and Technology of Sandy Alumina Production by Sinter Process

两段法生产砂状氧化铝附聚过程的研究

Study of the agglomeration process in the sandy alumina production by two-stage method

种分生产砂状氧化铝的研究进展

Development of producing sand alumina in seed precipitation

砂状氧化铝比表面积的测定

Determination of specific surface area of sandy alumina

砂状氧化铝技改项目安全管理特性及措施

Safety Management Properties and Safety Measures for the Technical Innovation Projects of Sandy Alumina

烧结法生产砂状氧化铝

Producing of Sandy Alumina by Sintering Process

分级机在砂状氧化铝生产中的应用

Application of classifier in sandy alumina production

多结构控制策略在砂状氧化铝分解温度控制系统中的应用

Application of the multi-construction control strategy in the decomposition temperature control system for sand-shaped aluminium oxide

分解温度对砂状氧化铝生产有着重要影响。

It is important to control the temperature of the decomposition process in sandy alumina production .

为此，本文针对烧结法生产砂状氧化铝的理论和工艺展开了深入的研究。

Therefore the dissertation focuses on the theory and technology of sandy alumina production by Sinter process .

高浓度混合精液生产砂状氧化铝工艺技术的研究应用

Researches and application of process technology of production of sandy alumina to highly concentrated and re ned mixed solution

砂状氧化铝焙烧工艺制度的选择&兼谈三水铝石脱水相变的途径

SELECTION OF TECHNOLOGICAL REGIME FOR SANDY ALUMINA ROASTING & On the Route for Dewatering and Phase Changing of Gibbsite

而目前碳分精液间断式种分很难生产出砂状氧化铝。

On the other hand , it is quite difficult to produce sand alumina by discontinuous seed decomposition at present .

解决碳分氢氧化铝强度较低、细粒子含量较高的问题是烧结法生产砂状氧化铝的关键。

Poor product strength and excessive fine particle content are the main problems to be solved in sandy alumina production .

目前，烧结法生产的氧化铝普遍是粉状或中间状的氧化铝，达不到砂状氧化铝的要求，研究烧结法生产砂状氧化铝的工艺，具有非常重要的现实意义。

Now , the alumina produced by sintering process is powder or intermediate alumina that can not meet the sand alumina standard .

同时，本文认为实施连续晶种分解也是生产砂状氧化铝的重要途径，通过实验提出了连续种分的理想的工艺条件。

At the same time , it is also important to apply continuous seed decomposition in order to produce sand alumina . Reasonable process means are given by experiments .

本文介绍了对某厂处理一水硬铝石矿的拜耳法高浓度溶出液，经引进、消化，设计了一段分解生产砂状氧化铝新工艺。

In order to treat the high-concentration Bayer-process digestion solution of diaspore ore , one plant introduced , digested and designed a new process of producing sandy alumina with lst-stage precipitation technique .

砂状氧化铝由于具有独特的显微结构、粒度分布及强度，在节能与环境保护要求日益严格的铝电解工业得到广泛的应用。

With the increasingly strict requirement of energy saving and environmental protection , sandy alumina is used widely in the industry of aluminum electrolysis , because of its particularly microstructure , suitable size distribution and high strength .

随着电解铝工业环保及节能的需要，对氧化铝的物理化学性能提出了新的要求，需要粒度粗、强度高、比表面积大及流动性好的砂状氧化铝。

With the needs of industrial aluminum electrolysis environmental protection and energy saving , the new physical and chemical properties of alumina such as big size , high intension , big special surface and good fluidity are demanded .

本文根据砂状氧化铝分解温度控制系统中数学模型难于建立、控制精度要求高的特点，提出了多结构控制策略的基本思想和设计方法。

Abstract According to the difficulty of establishing mathematical model and the high requirement of control accuracy in the decomposition temperature control system for sand-shaped aluminium oxide , the basic idea and design method of multi-construction control strategy are presented .

实验室的研究结果进一步证明了这一机理，通过控制溶液的过饱和度，为新析出的晶核提供良好的长大条件，能有效避免大量细粒子的产生，从而获得所需的砂状氧化铝产品。

This mechanism is furthermore approved by the laboratory experimental result . Controlling the super-saturation of liquor could guarantee a better condition for the new nuclei to grow up and avoid generating much more fine particles effectively , which is required in sandy alumina production .

对氧化铝产品的质量要求越来越高，具有流动性好、易溶解、强度高、对氟化氢吸附能力强及颗粒均匀粗大等特点的砂状氧化铝在市场中占据了主导地位。

Therefore , the higher and higher quality alumina is needed . The sandy alumina occupies the leading position in the market because of its feature of good fluidity , sensitive dissolution , high intensity , strong absorptivity to HF , and big and well particle size distribution .