Normal-temperature grinding production method for fine rubber powder

Abstract

The invention discloses a normal-temperature grinding production method for fine rubber powder. The method comprises the following process steps of: cutting a steel ring; separating a steel wire; crushing a tire; grinding in rubber; performing magnetic separation; coarsely separating fibers; finely grinding the rubber; separating the fibers again; grinding; and performing airflow separation treatment. The industrial method is the precedent of batch production of the fine rubber powder, and equipment investment in the whole production line is a half that of the conventional normal-temperature grinding method, and is approximately one eighth that of a low-temperature cryogenic grinding production line. The industrial production line has a compact structure, equipment is convenient to mount and maintain and has long service life, high rubber discharging rate, low power consumption and low noise, and various technical indexes are superior to those of more advanced air turbine expansion refrigeration rubber powder production technologies at present compared with those of rubber powder which is produced by a low-temperature cryogenic grinding method.

Description

technical field [0001] The present 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, there are still a large number of waste rubber products (including non-tire rubber products and tires) produced every year. 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. This is It is a common goal pursued by all countries in the world today. [0003] A variety of production methods have been developed for the treatment of waste rubber products, among which the traditional normal temperatu...

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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 refrigerant, and the freezing temperature is -196°C, and is crushed by impact machinery to obtain 0.075-0.30mm (200 mesh-48 mesh) Fine rubber powder with a fineness of 0.18-0.22mm (80 mesh to 60 mesh) is the main one, 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) times), and there are many difficulties in start-up, production, maintenance, management, etc.

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