Open circuit production line device and method for crushing aluminum oxide crusting block

Abstract

The invention discloses an open circuit production line device and an open circuit production line method for crushing an aluminum oxide crusting block. A material is processed through primary crushing of a production line, so the granularity of the fed material is less than or equal to 300mm, the granularity of the discharged material is less than or equal to 1mm, the standard granularity of the discharged material which can be reached through secondary crushing and tertiary crushing is reached, the production efficiency is improved, the consumption is reduced, and an aluminum oxide crust is recycled timely at the same time. Failures and maintenance are reduced, the labor intensity of workers is reduced, and the time and the production cost are saved. The device consists of a mechanical part and an electric control part, wherein the mechanical part consists of a crushing machine, an iron remover, a conveyor, a raw material cabin, a plugboard valve, a vibration feeding machine, a flour mill, a locked wind discharging device, a crude powder separator, a dust collector, a fan and a finished product cabin. The method for crushing the aluminum oxide crusting block sequentially comprises the following steps of: material feeding, flour milling, material separation, gas exhausting and material storage. The structure is simple, the method is simple and quick, the energy is saved, the efficiency is high, and the device and the method are safe and environment-friendly.

Description

technical field [0001] The invention relates to a device and a method of a crushing production line, in particular to a device and a method of an open-circuit production line for crushing alumina crust blocks. Background technique [0002] In recent years, the electrolytic aluminum industry has developed rapidly. Statistics show that since 2001, the domestic demand for electrolytic aluminum has grown at a rate of 1 million tons per year; by the end of 2003, the production capacity of electrolytic aluminum had reached 8.34 million tons; by 2008, electrolytic aluminum The production capacity has reached 12.5 million tons. With the rapid growth of electrolytic aluminum production in my country, the amount of alumina crusts left over by electrolytic aluminum enterprises in production has also increased. However, the research and development status of domestic alumina crust crushing technology is limited to the rectification and improvement of individual equipment. For example, ...

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Problems solved by technology

However, in this process, the equipment failure rate is high, the maintenance cost is high, and the liner of the crushing equipment is not wear-resistant, which reduces the operation rate of the equipment.

During the operation of the whole system, the dust of the materials is relatively large, the site environment cannot meet the environmental protection requirements, and the working environment of the workers is poor.

[0004] 2. Raymond mill crushing process: Raymond mill is used to grind alumina crusts into powder, but there are problems of low efficiency and poor material control, which are mainly reflected in 1. When the hardness of alumina crusts is high , the grinding speed of the Raymond mill is too slow, and the wear of the Raymond mill itself is also serious; 2. When the water content of the alumina crust is large, it is easy to adhere in the Raymond mill, and it is also easy to be damaged during the feeding and conveying process. 3. When the grinding fineness of the alumina crust block is required to be high, the Raymond mill’s grinding capacity is small; 4. The alumina crust block is doped before grinding When there is fine powder, it needs to be sieved once in advance; otherwise, these fine powders are easy to adhere in the Raymond mill and affect the transportation of the ground material; 5. The structure of the Raymond mill itself, the wear resistance of the hammer head and the jaw plate To a certain extent, it determines the grinding capacity of Raymond mill, so it is difficult to adapt to the development requirements of large industries

[0005] According to the above, because the electrolytic aluminum enterprises generally adopt the outdated processing technology of alumina crusts, the processing efficiency of the above method is low, the equipment failure rate is high, the degree of automation is low, the workload of equipment maintenance and repair is large, and the labor intensity of workers is high. Moreover, factors affecting large-scale industrial production such as the destruction of the environment of the electrolysis workshop; the output of alumina crusts is much higher than the recovery volume, forming a large backlog, resulting in transportation and storage costs, crushing and processing costs of alumina crusts, and The maintenance cost of the equipment used is extremely high, so there is an urgent need for a crushing process of alumina crust block and its production line suitable for large-scale industrial production

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