Manufacturing method of foaming generation suppression member and recycling processing method of waste tire

Abstract

To provide a foaming generation suppression member being a novel and excellent steel subsidiary material from a waste tire, and provide a technique capable of recycling by easily separating rubber and a wire piece as single bodies.SOLUTION: A foaming generation suppression member is obtained by a step (first step) of subjecting a waste tire to a shearing coarse crusher to obtain a mixture of coarse crushed objects of a rubber piece, a wire piece and a wire piece attached with rubber, and a step (second step) of subjecting the mixture of coarse crushed objects obtained in the first step to a shearing fine crusher and then to a magnetic separator to separate the objects into fine crushed objects of a rubber piece and a wire piece, wherein the fine crushed objects of the rubber piece and the wire piece obtained in the second step are mixed and compressed by 1:0.5 to 2.0 (weight ratio).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a forming generation inhibitor and recycled products using rubber pieces and wire pieces obtained by crushing and separating rubber, wire, etc. contained in waste tires.

Background Art

[0002] In today's automobile society, a large amount of tires are produced and consumed. Conventionally, most of these waste tires are cut in some way and the rubber part is used as fuel. In addition, the rubber is recycled as recycled rubber and the wire is recycled as iron material. However, the effective utilization and recycling of waste tires have not advanced sufficiently.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] Therefore, the present invention aims to further promote the effective utilization of waste tires. The waste tires are crushed and separated for each constituent material, and each constituent material is mixed and compressed at a certain ratio to be used as a by-material (forming generation inhibitor) for a blast furnace, or each separated constituent material can be recycled as a single raw material.

Means for Solving the Problems

[0005] In order to solve the above problems, the present inventor has intensively studied and developed the present invention with the following configuration. [1] A step of subjecting waste tires to a shearing coarse crusher to obtain a mixture of each coarse crushed material of rubber pieces, wire pieces, and wire pieces with rubber attached (the first step); a step of subjecting the mixture of each coarse crushed material obtained in the first step to a shearing fine crusher and then a magnetic separator to separate it into each fine crushed material of rubber pieces and wire pieces (the second step); and a method for producing a forming generation inhibitor, characterized in that each fine crushed material of rubber pieces and wire pieces obtained in the second step is mixed and compressed at a ratio of 1 to 0.5 to 2.0 (weight ratio) to form a forming generation inhibitor. [2] A step of subjecting waste tires to a shearing coarse crusher to obtain a mixture of rubber pieces with sides of 4 to 8 cm, wire pieces with lengths of 4 to 10 cm, and wire pieces with lengths of 4 to 10 cm with rubber attached (the first step); a step of subjecting the mixture obtained in the first step to a shearing fine crusher and then a magnetic separator to separate it into rubber pieces with sides of 0.3 to 5 cm and wire pieces with lengths of 0.3 to 5 cm (the second step); and a method for producing a forming generation inhibitor, characterized in that the rubber pieces with sides of 0.3 to 5 cm and the wire pieces with lengths of 0.3 to 5 cm obtained in the second step are mixed and compressed at a ratio of 1 to 0.5 to 2.0 (weight ratio) to form a forming generation inhibitor. [3] A step of subjecting waste tires to a single-shaft shearing coarse crusher to obtain a mixture of rubber pieces with sides of 4 to 8 cm, wire pieces with lengths of 4 to 10 cm, and wire pieces with lengths of 4 to 10 cm with rubber attached (the first step); a step of subjecting the mixture obtained in the first step to a shearing fine crusher and then a magnetic separator to separate it into rubber pieces with sides of 0.5 to 3 cm and wire pieces with lengths of 0.5 to 3 cm (the second step); and a method for producing a forming generation inhibitor, characterized in that the rubber pieces with sides of 0.5 to 3 cm and the wire pieces with lengths of 0.5 to 3 cm obtained in the second step are mixed and compressed at a ratio of 1 to 0.8 to 1.2 (weight ratio) to form a forming generation inhibitor.

[0006] [4]A step of subjecting waste tires to a shearing crusher and a magnetic separator to separate them into rubber pieces with sides of 4 to 8 cm, wire pieces with lengths of 4 to 10 cm, and wire pieces with lengths of 4 to 10 cm with rubber attached (the first' step), and a step of subjecting the wire pieces with lengths of 4 to 10 cm with rubber attached obtained in the first' step to a shearing fine crusher and a magnetic separator to separate them into rubber pieces with sides of 0.5 to 3 cm and wire pieces with lengths of 0.5 to 3 cm (the second' step), wherein the rubber pieces with sides of 0.5 to 3 cm are used as recycled rubber raw materials and the wire pieces with lengths of 0.5 to 3 cm are used as recycled iron raw materials. A recycling method for waste tires is characterized by this. [5]A step of subjecting waste tires to a single-shaft shearing crusher and a magnetic separator to separate them into rubber pieces with sides of 4 to 8 cm, wire pieces with lengths of 4 to 10 cm, and wire pieces with lengths of 4 to 10 cm with rubber attached (the first' step), and a step of subjecting the wire pieces with lengths of 4 to 10 cm with rubber attached obtained in the first' step to a shearing fine crusher and a magnetic separator to separate them into rubber pieces with sides of 0.5 to 3 cm and wire pieces with lengths of 0.5 to 3 cm (the second' step), wherein the rubber pieces with sides of 0.5 to 3 cm are used as recycled rubber raw materials and the wire pieces with lengths of 0.5 to 3 cm are used as recycled iron raw materials. A recycling method for waste tires is characterized by this. [6]A forming generation inhibitor produced by compression molding a mixture of rubber pieces obtained by crushing waste tires and wire pieces obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1:0.5 to 2.0 (weight ratio). A forming generation inhibitor is characterized by this. [7]A forming generation inhibitor produced by compression molding a mixture of rubber pieces with sides of 0.3 to 5 cm obtained by crushing waste tires and wire pieces with lengths of 0.3 to 5 cm obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1:0.5 to 2.0 (weight ratio). A forming generation inhibitor is characterized by this. [8]A forming generation inhibitor produced by compression molding a mixture of rubber pieces with sides of 0.5 to 3 cm obtained by crushing waste tires and wire pieces with lengths of 0.5 to 3 cm obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1:0.8 to 1.2 (weight ratio). A forming generation inhibitor is characterized by this.

Effects of the Invention

[0007] According to the present invention, it is possible to provide a forming generation inhibitor, which is a novel and excellent by-product for steelmaking, from waste tires, and it is also possible to easily separate rubber and wire pieces into individual components for recycling use.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0009] Next, embodiments of the present invention will be described. In the present invention, first, waste tires are subjected to a shearing coarse crusher to obtain a mixture of (1) rubber pieces, (2) wire pieces, and (3) wire pieces with rubber attached, each being a coarsely crushed product. Next, the mixture of the above-mentioned coarsely crushed products is subjected to a shearing fine crusher and then a magnetic separator to separate them into fine crushed products of rubber pieces and wire pieces. Thereafter, the fine crushed products of rubber pieces and wire pieces are mixed and compressed at a ratio of 1 to 0.5 to 2.0 (by weight) to obtain a forming generation inhibitor. During compression, pressurized heat is generated, causing the surface layer of the rubber pieces to be semi-molten and serve as a binder to fuse the wire pieces, thereby forming a molded product. At this time, a small amount of binder components (for example, resin components, silica gel, water glass, etc.) may be added for compression molding.

[0010] Preferred specific steps are as follows. That is, as shown in the flow sheet (for forming inhibitor) of Figure 1, In the first step, waste tires are subjected to a shearing coarse crusher (preferably a single-shaft shearing coarse crusher) to obtain a mixture of rubber pieces with sides of 4 to 8 cm and wire pieces with a length of 4 to 10 cm with rubber attached. Next, as a second step, the mixture obtained in the first step is passed through a shear shredder and then a magnetic separator to separate it into rubber pieces with sides of 0.3 to 5 cm and wire pieces with lengths of 0.3 to 5 cm. Then, as a second step, the rubber pieces with sides of 0.3 to 5 cm and the wire pieces with lengths of 0.3 to 5 cm obtained in the second step are mixed and compressed at a ratio of 1 to 0.5 to 2.0 (by weight) to form a foaming generation inhibitor.

[0011] As the waste tires used in the present invention, all waste tires such as waste passenger car tires, waste truck tires, and waste motorcycle tires can be used. The shredder is preferably a shear type, and particularly preferably a single-shaft type. Also, a coarse shredder and a fine shredder are used. First, the waste tire is coarsely shredded and then finely shredded. Here, when the mixture of (1) rubber pieces, (2) wire pieces, and (3) wire pieces with rubber attached that first came out of the coarse shredder is passed through the fine shredder, it becomes a mixture of (1) rubber pieces and (2) wire pieces. That is, when the (3) wire pieces with rubber attached generated by coarse shredding are passed through the fine shredder, the rubber attached to the wire pieces is peeled off from the wire pieces, and it becomes a state separated into rubber pieces and wire pieces. Therefore, when the mixture is passed through a magnetic separator, it is almost completely separated into only rubber pieces and wire pieces. Note that as the magnetic separator that attracts iron wires by magnetic force, any of a belt conveyor type, a hanging type, a drum type, etc. may be used.

[0012] By the way, in a blast furnace, operations such as melting metal ore, reducing agent, solvent, etc. at high temperature and removing impurities are carried out. At this time, bubbles are generated on the surface of the melt (slag), and a phenomenon called foaming occurs. Foaming increases the surface area of the melt and the reaction rate, but if it becomes excessive, the melt may overflow or the bubbles may burst and scatter, resulting in a dangerous state. To avoid this, a forming inhibitor is put into the blast furnace to moderately suppress forming.

[0013] Conventionally, as forming inhibitors, paper sludge, which is industrial waste, artificial marble chips, etc. have also been used, but waste tires have not been used. In the present invention, by using waste tires as raw materials and specifying the mixing ratio of rubber pieces and wire pieces and then compressing and molding them, a forming inhibitor of excellent quality can be provided. That is, as a result of tests, it was found that the forming inhibitor produced according to the present invention is of excellent quality without being inferior compared to other commercially available products.

[0014] Next, the flow sheet of FIG. 2 shows the process of crushing and magnetic separating waste tires to almost completely separate them into rubber pieces and wire pieces for recycling. That is, when waste tires are put into a coarse crusher, a mixture of "rubber pieces, wire pieces, rubber-wire pieces (wire pieces with rubber attached)" is obtained, but when that mixture is put into a fine crusher, it becomes a mixture of almost two types, rubber powder and wire pieces. Therefore, if that two-type mixture is put into a magnetic separator (magnetic separator), it can be easily separated into rubber pieces and wire pieces and provided.

Claims

1. A step of subjecting waste tires to a shearing crusher to obtain a mixture of each crushed product of rubber pieces, wire pieces, and wire pieces with rubber attached thereto (first step); a step of subjecting the mixture of each crushed product obtained in the first step to a shearing crusher and then to a magnetic separator to separate them into each crushed product of rubber pieces and wire pieces (second step); and a step of mixing and compressing each crushed product of rubber pieces and wire pieces obtained in the second step at a ratio of 1:0.5 to 2.0 (by weight) to obtain a forming generation inhibitor, characterized in that it is a method for producing a forming generation inhibitor.

2. A step of subjecting waste tires to a shearing crusher to obtain a mixture of rubber pieces having a size of 4 to 8 cm square, wire pieces having a length of 4 to 10 cm, and wire pieces having a length of 4 to 10 cm with rubber attached thereto (first step); a step of subjecting the mixture obtained in the first step to a shearing crusher and then to a magnetic separator to separate them into rubber pieces having a size of 0.3 to 5 cm square and wire pieces having a length of 0.3 to 5 cm (second step); and a step of mixing and compressing the rubber pieces having a size of 0.3 to 5 cm square and the wire pieces having a length of 0.3 to 5 cm obtained in the second step at a ratio of 1:0.5 to 2.0 (by weight) to obtain a forming generation inhibitor, characterized in that it is a method for producing a forming generation inhibitor.

3. A step of subjecting waste tires to a single-shaft shearing crusher to obtain a mixture of rubber pieces having a size of 4 to 8 cm square, wire pieces having a length of 4 to 10 cm, and wire pieces having a length of 4 to 10 cm with rubber attached thereto (first step); a step of subjecting the mixture obtained in the first step to a shearing crusher and then to a magnetic separator to separate them into rubber pieces having a size of 0.5 to 3 cm square and wire pieces having a length of 0.5 to 3 cm (second step); and a step of mixing and compressing the rubber pieces having a size of 0.5 to 3 cm square and the wire pieces having a length of 0.5 to 3 cm obtained in the second step at a ratio of 1:0.8 to 1.2 (by weight) to obtain a forming generation inhibitor, characterized in that it is a method for producing a forming generation inhibitor.

4. A step of subjecting waste tires to a shearing crusher and a magnetic separator to separate them into rubber pieces having a size of 4 to 8 cm square, wire pieces having a length of 4 to 10 cm, and wire pieces having a length of 4 to 10 cm with rubber attached thereto (first' step); and a step of subjecting the wire pieces having a length of 4 to 10 cm with rubber attached thereto obtained in the first' step to a shearing crusher and a magnetic separator to separate them into rubber pieces having a size of 0.5 to 3 cm square and wire pieces having a length of 0.5 to 3 cm (second' step), characterized in that the rubber pieces having a size of 0.5 to 3 cm square are used as recycled rubber raw materials and the wire pieces having a length of 0.5 to 3 cm are used as recycled iron raw materials in a recycling treatment method for waste tires.

5. A step of subjecting waste tires to a single-shaft shearing crusher and a magnetic separator to separate them into rubber pieces with sides of 4 to 8 cm, wire pieces with lengths of 4 to 10 cm, and wire pieces with lengths of 4 to 10 cm having rubber attached thereto (the first' step), and a step of subjecting the wire pieces with lengths of 4 to 10 cm having rubber attached thereto obtained in the first' step to a shearing fine crusher and a magnetic separator to separate them into rubber pieces with sides of 0.5 to 3 cm and wire pieces with lengths of 0.5 to 3 cm (the second' step), wherein the rubber pieces with sides of 0.5 to 3 cm are used as recycled rubber raw materials and the wire pieces with lengths of 0.5 to 3 cm are used as recycled iron raw materials. A recycling method for waste tires is characterized by this.

6. A forming generation suppressing material produced by compression molding a mixture of rubber pieces obtained by crushing waste tires and wire pieces obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1 to 0.5 to 2.0 (weight ratio). The forming generation suppressing material is characterized by this.

7. A forming generation suppressing material produced by compression molding a mixture of rubber pieces with sides of 0.3 to 5 cm obtained by crushing waste tires and wire pieces with lengths of 0.3 to 5 cm obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1 to 0.5 to 2.0 (weight ratio). The forming generation suppressing material is characterized by this.

8. A forming generation suppressing material produced by compression molding a mixture of rubber pieces with sides of 0.5 to 3 cm obtained by crushing waste tires and wire pieces with lengths of 0.5 to 3 cm obtained by crushing waste tires, wherein the mixing ratio of the rubber pieces to the wire pieces is 1 to 0.8 to 1.2 (weight ratio). The forming generation suppressing material is characterized by this.

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