Method for crushing producing fineness rubber powder under normal temperature

Abstract

The invention relates to a method for producing fine rubber powder by grinding under normal temperature, which adopts the following processes: trimming of steel rings, separation of steel wires, crushing of tires, grinding in the rubber, magnetic selection and separation, rough selection of fibers, finely grinding of the rubber, reselection of the fibers, magnetic reselection, spiral transportation, grinding and airflow selection. The industrial method initiates the precedent of the production of the fine rubber power in batch and the investment of equipment in a whole production line is a half investment of the traditional grinding method under the normal temperature while the investment of the equipment is one eighth of the investment of freezing grinding production line under low temperature. The industrial production line has the advantages of compact structure, convenient arrangement and maintenance of the equipment, long service, life, high rate of rubber output, low power consumption and low noise. Compared with rubber powder index of the freezing grinding production method under the low temperature, each technical index excels current the advanced technology for producing the rubber powder by expansion cooling of air turbines.

Description

Technical field: [0001] The invention relates to the technical field of waste rubber product treatment methods, more specifically to a production method for producing fine rubber powder by crushing waste rubber products under normal temperature conditions, especially the production method of fine rubber powder produced by crushing waste tires under normal temperature conditions production method. Background technique: [0002] At present, a large number of waste rubber products (including non-tire rubber products and tires) are produced every year, and a large number of waste tires and waste rubber products need to be disposed of. The disposal of these wastes can neither pollute the environment, but also be able to be recycled and reused. A common goal pursued by all countries in the world. [0003] A variety of production methods have been developed for the treatment of waste rubber products, among which the traditional normal temperature pulverization method and low tempe...

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Problems solved by technology

[0004] The traditional room temperature pulverization method uses secondary rolling to produce rubber powder with a particle size of 0.31-1.4mm (48 mesh to 15 mesh); the other is the room temperature continuous pulverization method (called CTC technology) developed by Kobe Steel in Japan. The two processes of fine crushing and fine crushing produce the rubber powder with the same particle size as above. The disadvantages of the above method are that the particle size of the rubber powder is large, which cannot meet the requirements of users, the output is low, the production cost is high, the quality of the rubber particles is unstable, and it is difficult to adapt to the requirements of industrial production.

[0005] Low-temperature freezing and crushing method, such as USP4863106, the low-temperature freezing and crushing method disclosed in USP4863106, 5368040, adopts liquid nitrogen as a refrigerant, and the freezing temperature is -196 ° C. It is crushed by impact machinery to obtain fine particles of 0.075-0.30 mm (200 mesh-48 mesh). Fine rubber powder with a high density, mainly 0.18-0.22mm (80 mesh to 60 mesh), but this method is expensive in equipment, large in investment (5 times that of the normal temperature pulverization method), and high production cost (5 times that of the normal temperature method) ), and there are many difficulties in start-up, production, maintenance, management, etc.

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