Study On The Design Of Circulation Fluidized Bed Hydrated Alumina Calcining System

The alumina plays important role to development of Chinese economy as the industrial raw materials, and the alumina of Chinese production no matter in quantity, or quality can't meet market's demands, so a large amount of alumina must be imported from international market every year, however, the domestic alumina production costs occupies the front row of the world. It's an important subject of roast industry that how to improve the quality of alumina production and reduce consumption. In this paper the roast way of the civil and international was analyzed and compared firstly, and three main kinds of technological processes in the world at present were summarized, a basic method of theoretical research of the calcine system was given. Finally the corresponding research work was processed based on the research way. In this paper calcine flow and particle movement has analyzed firstly, so it's clear that the dehydration course of wet supplies and every single role in system of equipment; the distributions of supplies and energy were given through calculating the supplies and energy balance to the system which has offered the basis on the systematic design. Then the paper analyzed the principle and characteristic of capital equipment of system such as preheating water extractor, the main roast stove, cyclone separator, and the structure characteristic of equipments and the rule of particle movement were given, thus, the paper researched and discussed the size design of every equipment in terms of engineering design detailedly, the influence of system induced by operated parameters were analyzed and discussed at the same time. This paper developed a design platform for Hydrated Alumina Circulation Fluid Bed Calcining System (HA-CFB-CS) connection the project reality. This platform can analyze and calculate the balance of supplies and energy, the size of single equipment and resistance time of the system, it is the first one domestic design platform of the alumina roast, and has been applied to GuiYang Aluminium Magnesium Design and Research Institute for assistant design of roast system already. The platform has the characteristics of easily install, friendly interfaces, convenience operation, exactly calculating, which can supervise the system design. Finally, the thesis summarized the whole work and put forward to further researches.