Closed type production line device and method for crushing aluminum oxide crusted blocks

Abstract

The invention discloses a closed type production line device and a method for crushing aluminum oxide crusted blocks. In the invention, materials are crushed primarily on a production line, so that the feeding particle size is less than or equal to 300 millimeters, the discharging particle size is less than or equal to 1 millimeter, a standard discharging particle size which can only be reached by performing secondary and tertiary crushing is reached, the production efficiency is increased, the consumption is lowered, and aluminum oxide crusted blocks are recycled in time; and automatic running of the entire production line is controlled through an electric control system, so that dust purification in the crushing process is realized simultaneously. The closed type production line device consists of a mechanical part and an electric control part, wherein the mechanical part consists of a crusher, an iron remover, a conveyer, a raw material cabin, a gate valve, a vibratory feeder, a pulverizing mill, an air locking discharge valve, a coarse powder separator, a cyclone dust collector, a circular fan, a bag type dust collector, an exhaust fan, iron removers and a finished product cabin. The method for crushing the aluminum oxide crusted blocks comprises feeding, pulverizing, material separating, air replenishing, material and dust collecting and material storing in sequence. The device and the method are safe, environmentally-friendly and efficient, and energy is saved.

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 a closed-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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