Alumina crust block crushing process and production line thereof

Abstract

The invention relates to an alumina crust block crushing process and a production line thereof. According to the invention, a jaw crusher is used for carrying out rough crushing upon alumina crust blocks with large particle sizes; a primary material produced by rough crushing is delivered to a material chamber; material delivered from the material chamber is delivered into a vibration feeder; the material is uniformly fed into a grinder by using the vibration feeder; the material is subjected to secondary grinding and crushing in the grinder; grinded material with particle size smaller than 10mm<3> is discharged from the grinder, and the material with particle size larger than 10mm<3> is continued to be grinded until the requirement is reached; the produce with the required particle size is delivered into a vibration sieve through a bucket elevator, and is sieved into three materials, which are a material with particle size below 1mm<3>, a material with particle size of 1-8mm<3>, and a material with particle size higher than 8mm<3>; the crushed materials are respectively delivered into a 1mm<3> finished product chamber and a 1-8mm<3> finished product chamber; the material with the particle size higher than 8mm<3> is delivered into the grinder through a pipe and is re-crushed. All devices of the process are provided with bag filters, such that production discharge reaches a national environment-protection requirement.

Description

Technical field [0001] The invention relates to a process and production line for crushing alumina crust blocks, in particular to a process and production line for 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 increased 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; The production capacity has reached 12.5 million tons. With the rapid growth of my country's electrolytic aluminum production, the alumina crusts left by electrolytic aluminum enterprises in production have also increased. However, the current research and development status of the domestic alumina crust block crushing process is limited to the rectification and improvement of individual equipment. For example, there are a lot of researches on mills, classifiers, dus...

AI Technical Summary

Problems solved by technology

[0003] 1. Use the crusher to crush the alumina crusts into the required particle size, convey the crushed alumina particles to the screen for filtration through the conveyor, and crush the unfiltered large particles with the crusher and then screen until The crushed alumina particles can pass through the screen, that is, the current multi-stage crushing; but 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. Use Raymond mill to grind alumina crust into powder, but there are problems of low efficiency and poor material control, which are mainly reflected in (1). When the hardness of alumina crust is high, Raymond mill The grinding speed is too slow, and the Raymond mill itself wears seriously; (2), when the water content of the alumina crust is large, it is easy to stick in the Raymond mill, and it is also easy to block during the feeding and conveying process , resulting in a reduction in the production capacity of the Raymond mill; (3), when the fineness of the alumina crust block is required to be high, the Raymond mill has a small grinding capacity; (4), before the alumina crust block is ground When mixed with fine powder, it needs to be sieved once in advance; otherwise, these fine powders are easy to adhere to the Raymond mill and affect the transportation of the ground material; (5), the structure of the Raymond mill itself, the hammer head, the jaw plate The wear resistance of the Raymond mill determines the grinding capacity of the Raymond mill to a certain extent, so it is difficult to adapt to the development requirements of large industries

[0007] This shows that the above-mentioned existing alumina crust block crushing process and its production line obviously still have inconvenience and defects in processing methods and use, and need to be further improved urgently

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable processing method for general processing methods that can solve the above-mentioned problems. This is obvious. It is a problem that relevant industry players are eager to solve

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