CN102248615A - Production method of producing fine rubber powder by pulverizing at room temperature - Google Patents

Abstract

The production method for producing the fine rubber powder by normal temperature crushing adopts the following process steps: the industrial method creates a precedent for producing the fine rubber powder in batches, the equipment investment of the whole production line is 1/2 of the traditional normal-temperature crushing method, and the equipment investment is 1/8 of the low-temperature freezing and crushing production line. The industrial production line has compact structure, convenient equipment installation and maintenance, long service life, high glue yield, low power consumption and low noise, and compared with the glue powder produced by a low-temperature freezing and crushing method, the technical indexes of the industrial production line are superior to those of the prior advanced air turbine expansion refrigeration glue powder production technology.

Description

Production method of producing fine rubber powder by pulverizing at room temperature

technical field

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

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.

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 temperature freezing pulverization method are the most notable.

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 rubber powder with the same particle size is produced by two processes of fine crushing and fine crushing. 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.

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 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 and other aspects.

Contents of the invention

The purpose of the present invention is to provide an industrial method for producing fine rubber powder by crushing waste rubber products at normal temperature, especially a production method for producing fine rubber powder by crushing waste rubber tires at normal temperature.

The industrial method comprises the following steps:

1) Steel ring cutting: Cut the waste tires on the steel ring cutting machine to cut the tire seam bead ring; (has obtained a utility model patent, the patent number is ZL200820043072.4);

2) Steel wire separation: After the tire with the bead bead cut off is passed through the bead separator, the bead bead is separated from the tire (a utility model patent has been applied for, and the patent number is ZL201120168364.2);

3) For tire crushing, the whole tire that has broken away from the bezel wire ring is directly transported to the tire crusher (has obtained the utility model patent right, the patent number is ZL201020298420.X) for the first complete tire crushing. After the whole tire is crushed, the output is about 50mm×50mm block rubber, and the size of the output can be adjusted within a certain range by changing the roller screen of the crusher;

4) Crushing in the rubber: the bulk rubber material from step 3 is transported to the tire shredder (the utility model patent has been obtained, the patent number is ZL201020298434.1), and it is crushed again, and the moving knife is fixed on the machine body The fixed knife on the top crushes the material in a high-speed shearing manner, cuts off the steel wires and fibers that are distributed in the tire during manufacturing, and separates them from the rubber by shearing and tearing, and the rubber block is broken into about 6mm to 12mm colloidal particles. The size of the discharge particle size can be adjusted by changing the mesh size of the discharge screen;

5) Magnetic separation: The materials produced in the above steps are transported to the belt-type magnetic separator through the belt conveyor (a utility model patent has been applied for, the patent number is ZL201120161231.2). The belt-type magnetic separator relies on its strong magnetic force, Separation of steel wire mixed in the material;

6) Coarse fiber separation: Pass the material after magnetic separation in step 5 through a roller sieve to roughly separate the coarse fiber in the tire. Since the fiber content in the bias tire is too high, the treatment of the bias tire must pass Rotary roller sieve treatment, rough separation of crude fibers in bias tires, so that the use value of crude fibers can be improved and the inconvenience of subsequent processing caused by high fiber content can be solved;

7) Fine crushing of rubber: transport the coarsely sorted fiber material in step 6 to XJX-450 rubber fine crushing machine (has obtained utility model patent, patent number is ZL200520056431.6) for fine crushing. By adjusting the size of the discharge screen hole of the fine crusher, the rubber powder of 5 mesh to 15 mesh can be directly produced;

8) Fiber re-sorting: The materials produced in step 7 are transported to the linear vibrating screen with a belt conveyor for the second coarse fiber sorting to improve the quality of the rubber powder and ensure the purity of the rubber powder.

9) All the materials produced in step 8 that have undergone secondary fiber sorting are sent to the cyclone collector by wind force, and after being collected by the cyclone collector, they enter the QWF airflow sorting machine (the utility model patent has been obtained, and the patent number is ZL200320118550 .0). The rubber powder is finely separated from the rubber particles and fibers under the cross-flow of the rotor. After three times of fiber separation, the fiber content of the rubber powder can be guaranteed to be 0.1%, while the fiber content in the rubber powder stipulated by the state is less than 0.6% ( GB/T19208-2003);

10) Grinding, horizontal rubber grinding machine (applied for utility model patent, patent number ZL201120168579.4) cuts and grinds the 5-15 mesh rubber particles in step 11 to obtain 40-120 mesh fine rubber powder;

11) Airflow sorting treatment, the fine rubber powder of 40 mesh to 120 mesh obtained in step 12, and then through airflow sorting machine (has obtained the utility model patent right, the patent number is ZL200320118550.0) sorting treatment, to get Fine rubber powder with different specifications and particle sizes that still maintains the physical and chemical properties of the original rubber material.

Due to the adoption of advanced normal temperature crushing process and the adoption of new series of special equipment in this industrial method: steel ring cutting machine, bead separator, tire crusher, rubber shredder, rubber fine crusher, belt type magnetic separator, horizontal rubber Grinding machine; adopting the process design of steel wire removal and multiple fiber removal, it can completely remove the steel wire and fiber in the tire, and the performance of the fine rubber powder produced is similar to that of raw rubber, which is better than that of reclaimed rubber powder produced by other processes. It is suitable for the production of any rubber products, highway paving, waterproof building materials, etc.

The outstanding effects of the present invention are: this production method creates a precedent for batch production of fine rubber powder, the equipment investment of the whole production line is 1/2 of the traditional room temperature grinding method, and the equipment investment is about 1/8 of the low-temperature freezing grinding production line. The production line has a compact structure, easy installation and maintenance, long service life, high glue output rate, low power consumption, and low noise. Compared with the rubber powder produced by the low-temperature freezing crushing method, the technical indicators are better than the more advanced air turbine expansion at present. Production technology of refrigeration rubber powder;

After cutting off the inner ring of the tire, the main steel wire is removed, the power of the equipment required for crushing is small, and the service life of the tool is long;

This production method has low energy consumption and less labor. The production line with an annual output of 3,000 tons consumes 582 degrees of electricity per ton of rubber powder, while the low-temperature freezing method is 900 degrees. The total production cost is 1/5 of the low-temperature freezing and pulverizing method;

The grinding machine has the advantages of compact overall structure, small vibration and low noise. It can grind rubber powder from 5-15 mesh to 120-40 mesh. Its product quality is high, and the particle size and working temperature are automatically adjusted by electric glue monitoring;

There are many varieties and narrow particle size distribution, which can be adjusted arbitrarily according to the needs;

The utilization rate of raw materials is high, and the steel wire and fiber in the tire can be completely recycled;

The production environment is good, the air level is 2, the noise is 55 decibels, and there is no waste water and dust.

Description of drawings

Accompanying drawing is process flow chart of the present invention

Detailed ways:

See accompanying drawing, its production method is:

1) Steel ring cutting: Cut the waste tires on the steel ring cutting machine to cut the tire seam bead ring; (A utility model patent has been applied for, and the patent number is ZL200820043072.4)

2) Steel wire separation: After the tire with the bead bead cut off is passed through the bead separator, the bead bead is separated from the tire (a utility model patent has been applied for, and the patent number is ZL201120168364.2);

3) For tire crushing, the whole tire that has broken away from the bezel wire ring is directly transported to the tire crusher (has obtained the utility model patent right, the patent number is ZL201020298420.X) for the first complete tire crushing. After the whole tire is crushed, the output is about 50mm×50mm block rubber, and the size of the output can be adjusted within a certain range by changing the roller screen of the crusher;

4) Crushing in the rubber: the bulk rubber material from step 3 is transported to the tire shredder (the utility model patent has been obtained, the patent number is ZL201020298434.1), and it is crushed again, and the moving knife is fixed on the machine body The fixed knife on the top crushes the material by high-speed shearing, cuts off the steel wires and fibers that are distributed in the tire during manufacturing, and separates them from the rubber by shearing and tearing, and the rubber block is broken into about 6mm to 12mm colloidal particles. The size of the discharge particle size can be adjusted by changing the mesh size of the discharge screen;

5) Magnetic separation: The materials produced in the above steps are transported to the belt-type magnetic separator through the belt conveyor (a utility model patent has been applied for, the patent number is ZL201120161231.2). The belt-type magnetic separator relies on its strong magnetic force, Separation of steel wire mixed in the material;

6) Coarse fiber separation: Pass the material after magnetic separation in step 5 through a roller sieve to roughly separate the coarse fiber in the tire. Since the fiber content in the bias tire is too high, the treatment of the bias tire must pass Rotary roller sieve treatment, rough separation of crude fibers in bias tires, so that the use value of crude fibers can be improved and the inconvenience of subsequent processing caused by high fiber content can be solved;

7) Fine crushing of rubber: transport the coarsely sorted fiber material in step 6 to XJX-450 rubber fine crushing machine (has obtained utility model patent, patent number is ZL200520056431.6) for fine crushing. By adjusting the size of the discharge screen hole of the fine crusher, the rubber powder of 5 mesh to 15 mesh can be directly produced;

8) Fiber re-sorting: The materials produced in step 7 are transported to the linear vibrating screen with a belt conveyor for the second coarse fiber sorting to improve the quality of the rubber powder and ensure the purity of the rubber powder.

9) All the materials produced in step 8 that have undergone secondary fiber sorting are sent to the cyclone collector by wind force, and after being collected by the cyclone collector, they enter the QWF airflow sorting machine (the utility model patent has been obtained, and the patent number is ZL200320118550 .0). The rubber powder is finely separated from the rubber particles and fibers under the cross-flow of the rotor. After three times of fiber separation, the fiber content of the rubber powder can be guaranteed to be 0.1%, while the fiber content in the rubber powder stipulated by the state is less than 0.6% ( GB/T19208-2003);

10) Grinding, horizontal rubber grinding machine (applied for utility model patent, patent number ZL201120168579.4) cuts and grinds the 5-15 mesh rubber particles in step 9 to obtain 40-120 mesh fine rubber powder;

11) Airflow sorting treatment, the 40 mesh to 120 mesh fine rubber powder obtained in step 10, and then go through the airflow sorting machine (the utility model patent right has been obtained, the patent number is ZL200320118550.0), and the obtained Fine rubber powder with different specifications and particle sizes that still maintains the physical and chemical properties of the original rubber material.

The production line of this industrial method can also be used for the recovery of rubber products other than tires, such as tapes, rubber hoses, rubber shoes, wires and cables, industrial rubber parts, rubber sheets, etc.; the tires mentioned in this industrial method include automobile tires (car tires) , truck tires, heavy truck tires, tractor tires and rickshaw tires, etc. It is well known that tires are synthesized from natural rubber, rubber such as styrene-butadiene rubber, butadiene rubber, isoprene rubber, butyl rubber, ethylene-propylene rubber, and the like. As various vehicle tires are different, for example, car tires are basically made of all-synthetic rubber, while truck tires are mainly made of natural rubber. In order to ensure the quality of fine rubber powder and meet the needs of various users for fine rubber powder products, the collected waste non-tire rubber products and waste tires are removed from dirt and impurities, and are sorted and stacked according to different rubber varieties, and stored for later use.

Claims (1)

1. normal temperature pulverization produces the production method of fine rubber powder, is characterized in that: 1) Steel ring cutting: Cut the waste tires on the steel ring cutting machine to cut the bead wire ring of the tire; 2) Steel wire separation: After the tire with the cut bead wire ring passed through the bead separator, the bead wire ring is separated from the tire; 3) Tire crushing: The whole tire that has broken away from the bezel wire ring is directly sent to the tire crusher. After the whole tire is crushed, the output is about 50mm×50mm block rubber. The size of the output can be changed by changing the crusher. The circular rolling screen can be adjusted within a certain range; 4) Crushing in the rubber: the bulk rubber material from step 3 is transported to the tire shredder for crushing again, and the material is crushed by high-speed shearing by the moving knife and the fixed knife fixed on the machine body, and the tire is crushed. The steel wires and fibers clothed in it are cut off during manufacturing, and they are separated from the rubber by shearing and tearing, and the rubber blocks are broken into rubber particles of about 6mm to 12mm; the size of the output particle size can be adjusted by changing the output screen. The size of the hole is adjusted; 5) Magnetic separation: the materials produced in the above steps are transported to the belt-type magnetic separator through the belt conveyor, and the belt-type magnetic separator separates the steel wire mixed in the material with its strong magnetic force; 6) Coarse fiber separation: Pass the material after magnetic separation in step 5 through a roller sieve to roughly separate the coarse fiber in the tire. Since the fiber content in the bias tire is too high, the treatment of the bias tire must pass Rotary roller sieve treatment, rough separation of crude fibers in bias tires, so that the use value of crude fibers can be improved and the inconvenience of subsequent processing caused by high fiber content can be solved; 7) Fine crushing of rubber: transport the material with coarsely sorted fibers in step 6 to the XJX-450 rubber fine crusher for fine crushing; by adjusting the size of the discharge screen hole of the fine crusher, 5 mesh to 15 mesh can be directly produced rubber powder; 8) Fiber re-sorting: the materials produced in step 7 are transported to the linear vibrating screen with a belt conveyor for the second coarse fiber sorting to improve the quality of the rubber powder and ensure the purity of the rubber powder; 9) Send all the materials produced in step 8 after secondary fiber sorting to the cyclone collector by wind, and then enter the QWF airflow sorter after being collected by the cyclone collector. The rubber particles and fibers are finely separated, and after three fiber separations, the fiber content of the rubber powder can be guaranteed to be 0.1%, while the fiber content in the rubber powder stipulated by the state is less than 0.6% (GB/T19208-2003); 10) Grinding, the horizontal rubber grinder cuts and grinds the 5-15 mesh rubber particles in step 9 to obtain 40-120 mesh fine rubber powder; 11) Airflow sorting treatment, the 40-mesh-120-mesh fine rubber powder obtained in step 10, and then through the airflow sorting machine (has obtained the utility model patent right, the patent number is ZL200320118550.0) sorting treatment, to get Fine rubber powder with different specifications and particle sizes that still maintains the physical and chemical properties of the original rubber material.