JPH09143531A - Foaming depressant for converter slug utilizing recovered materials from pinball machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method which makes it possible to effectively reuse a ligneous material and a plastic material as foaming depressant for a converter slug at the industrial point of view with respect to the ligneous material and plastic material of used pinball machines which have been yearly increasing in number but for which an effective reuse method has not been attained thus far. SOLUTION: The foaming depressants for the converter slug are produced by press molding the ligneous and plastic-natured recovered materials classified through magnetic separation and gravity separation after the used pinball machines have been cracked to pieces. There is also a case where the foaming depressants are formed by press molding the ligneous and plastic-natured recovered materials after these materials are mixed with at least one kind to be selected among metallic oxides, raw dolomite, limestone, marble, crushed stones, blast furnace slug, converter slug, refractory powder, abrasive powder, waste oil, tar asbestos, paper making sludge and sludge which are equivalent to 1 to 70wt.% of the recovered materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood material and a plastic material recovered from a used pachinko machine for recycling as a forming sedative for converter slag.

[0002]

2. Description of the Related Art Conventionally, used pachinko machines are dismantled after being disassembled by a trader, but if the amount of broken products generated per pachinko machine is classified by material, on average,
Iron material 4 kg, non-ferrous metal material 2 kg, wood material 6 kg, ABS
(Acrylonitrile-butadiene-styrene copolymer resin) 5 kg, PC (polycarbonate) 1 kg.

Regarding these broken products, ferrous materials and non-ferrous metal materials are each recycled as metal scraps, but wood materials and plastic materials made of ABS and PC are about 6 pieces of broken product per pachinko machine.
Despite occupying 7% by weight, it is discarded or incinerated without being recycled.

On the other hand, a forming sedative for converter slag is added to the slag in the converter steelmaking in order to suppress the bubbling and overflow of the slag caused by CO gas at the end of the oxidation refining. (Japanese Patent Publication No. 52-26488, Japanese Patent Publication No. 57-39291, Japanese Patent Publication No. 63-61368, JP-A No. 7-14541
As for the sedative, as described in these publications, as the sedative, industrial wastes such as papermaking sludge or the incineration thereof are used instead of pine logs that have been used for a long time. It is provided with ash.

However, it is the current situation that wood materials and plastic materials recovered from used pachinko machines are used as foaming sedatives for converter slag for recycling.

[0006]

Although the number of pachinko machines used as easy-to-use entertainment is nationwide and the number of used pachinko machines is increasing with the increasing frequency of new model introduction, it is enormous.
According to the state of collection of waste products, there is a problem in that the wood material and the plastic material corresponding to the majority of about 67% by weight are not reused by recycling.

Another problem is that a process for effectively separating and recovering used wood and plastic materials from a used pachinko machine has not been established so that they can be adapted for recycling.

[0008]

In order to solve the above problems, the present invention collects wood materials and plastic materials from a used pachinko machine through a process of breaking-magnetic sorting-specific gravity sorting, and collecting them. The technical constitution of the present invention is to provide a method of reusing pressure forming to form a forming sedative of converter slag, and the technical constitution of the present invention is that after sorting a used pachinko machine, it is separated by magnetic sorting and specific gravity sorting. In a forming sedative of a converter slag using a recovered material from a pachinko machine, which is formed by press-molding a recovered material of a woody plastic material, the forming sedative is for the recovered material of the woody material and the plastic material, 1 to 70% by weight of metal oxides, raw dolomite, limestone, marble, slag, blast furnace slag, converter slag, refractory powder, abrasive powder, waste oil, tar, asbestos, paper sludge, sludge sludge At least selected from the group consisting of di 1
In some cases, the seeds are mixed and then pressure-molded.

With the above-mentioned technical constitution, the present invention uses wood materials and plastic materials of used pachinko machines, which have not been effectively reused as the number of years increases, as a forming sedative for converter slag. It provides a method that can be effectively reused in the industry, and since industrial waste is used as an additive for increasing the specific gravity, both contribute to the recycling and reuse of waste. is there.

In calming the forming of the converter slag, it is the most effective requirement to give a calorific value to the slag to reduce the viscosity of its surface. Therefore, the calorific value required for the calming agent is, for example, the above-mentioned value. Japanese Patent Publication Sho 63-6
According to the 1368 publication, it is pointed out that 5,000 kcal / kg or more is desirable.

Therefore, the wood and plastic materials recovered from the pachinko machine have a total calorific value of 5,000 kc.
Since it far exceeds al / kg, it is sufficiently useful as a forming sedative for converter slag.

Further, since the wood material and the plastic material generate a large amount of gas during combustion, this destroys the CO gas bubble wall forming the forming in the converter slag layer, and agitates the slag layer to generate gas. Since it promotes the release of the bubbles themselves, it can be said that this is also useful as a calming agent for forming.

The separation process from the used pachinko machine to the recovery of wood and plastic materials begins with the breaking of the pachinko machine body, separates the iron material by magnetic separation, and then separates the non-ferrous metal material, wood material, and plastic material by specific gravity selection. To
It shall be sorted according to the sorting corresponding to the specific gravity of each.

Since the plastic materials used in the pachinko machine are ABS and PC, both of which are heat-softening, the mixture of the wood material and the plastic material obtained as described above forms a binder by frictional heat generated at the time of pressurization. It can be molded without adding.

Next, in the second aspect of the invention, an additive corresponding to 1 to 70% by weight of the recovered material in the first aspect of the invention is added with metal oxides, raw dolomite, limestone, marble, meteorite, blast furnace slag. , At least one of converter slag, refractory powder, abrasive powder, waste oil, tar, asbestos, papermaking sludge, and sludge sludge is added for pressure molding.
These additives are for ensuring the weight of the forming sedative molding, and when the sedative is put into the converter, it breaks through the slag surface layer and helps to reach the inside of the slag. As a result, the type and amount can be selected according to the viscosity of the slag.

Among the additives, the inorganic ones impart a hammering force to the slag layer at the time of charging as the specific gravity of the molded body increases, and the organic ones likewise increase the specific gravity, as well as the combustion gas and the calorific value. It will contribute to the calming of forming.

Further, these additives basically reuse industrial waste.

The amount of the additive used is 1 to 70 with respect to the recovered material.
The reason why the content is set to% by weight is that the effect of the additive is difficult to be recognized when the content is less than 1% by weight, and the content becomes excessive when the content exceeds 70% by weight to reduce the forming sedative effect of the recovered material.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION In carrying out the present invention, equipment and devices having special specifications are not required in all steps, and conventional products can be used as they are.

That is, as for the breaking of the used pachinko machine, either a twin-screw breaking machine or a single-screw breaking machine can be applied, and a compound breaking with the former as the primary and the latter as the secondary may be adopted.

The crushed product may be sent to the magnetic separator as it is, but if pre-processing is carried out, for example, by passing through a 10 mm sieve and passing under the sieve, the processing in the next step becomes smooth.

The magnetic separator may be either a drum type or a belt type, and the remainder of the separated iron material is a non-ferrous metal material (zinc, brass, copper wire), wood material, plastic material by a gravity sorter. Be subdivided into

A general-purpose inclined plate selection type is useful as a specific gravity sorter.

The mixture of the wood material and the plastic material finally obtained through the above steps is an embodiment in which fine particles, grains and powders are mixed, but this is as it is or the above-mentioned additives are selectively added. And press-mold it into an arbitrary shape.

A usual pressure molding machine for powder or granules or an extrusion molding machine can be applied to the pressure molding, and heating is not particularly required.

The shape and size of the molded body are not particularly limited, but in order to increase the reaction area in the converter slag layer, the shape is preferably cylindrical or polygonal with a through hole. , For dimensions,
An outer diameter of 50 m, which is commonly used from the viewpoint of handling
It can be said that those having a height of m and a height of 35 mm are preferable.

Further, the moisture content of the molded product after molding is not limited, but if the thermal conditions of the carrier system in practical use are extremely severe, the moisture content after molding is 20% by weight to prevent softening or ignition of the molded product. In some cases, it is preferable to add it within the range of not exceeding%.

The reason why the upper limit of the water content after forming is set to 20% by weight is that consideration is given to the shape retention of the formed body and the influence on the steel bath in the converter.

[0029]

【Example】

[Example 1] A used pachinko machine was coarsely crushed by a biaxial shear crusher to obtain coarse crushed pieces and lumps having a maximum size of about 150 mm.

Next, this was subjected to secondary crushing by a uniaxial shear crusher, the crushed product was sieved with a 10 mm mesh sieve, the sieve was returned to the crusher again, and the under sieve was sent to a belt type magnetic separator to separate and remove the iron material. did.

The remaining non-magnetic material is non-ferrous metal material made of zinc, brass, copper wire, wood material made of beech, lauan, ABS,
Since it is a mixture of plastic materials made of PC and their specific gravities are known, they were easily separated by a specific gravity difference type sorting device, and wood materials were collected as a group of plastic materials.

In this recovered product, the wood material was needle-shaped or strip-shaped, and the plastic material was fine-grained or strip-shaped.

The wood material and the plastic material thus obtained are pressed by a powder-granular molding press to obtain a diameter of 50 mm × 35 mm.
Was molded into a cylindrical shape to obtain a forming sedative for converter slag.

[Embodiment 2] A papermaking sludge 30 is used in comparison with the recovered wood material and plastic material 100 shown in Embodiment 1.
% And 5% by weight of magnesia-based refractory powder, and mixed, and then pressure-molded by an extrusion molding machine into a pseudo octagonal column with a through side of 50 mm on the opposite side, 35 mm in width and 12 mm in diameter, and having a through hole of φ12 mm. And

When 40 kg / CH was added to the forming slag of a 200-t converter, the products of the present invention shown in Examples 1 and 2 all calmed down 1 minute after the addition.
The sedative effect was very good.

[0036]

The present invention is embodied in the form described above and has the following effects.

That is, a method for industrially effectively reusing the woody materials and plastic materials of used pachinko machines, which have not been effectively reused as the number of years increases, can be effectively used as a forming sedative for converter slag. Furthermore, since industrial waste is used as an additive for increasing the specific gravity, both contribute to the recycling and reuse of waste.

Claims (2)

[Claims] 1. A magnetic sorting machine after crushing a used pachinko machine,
Forming sedative for converter slag that uses recovered material from a pachinko machine, which is formed by press-molding recovered wood plastic material that has been sorted through specific gravity sorting. 2. After the used pachinko machine is broken, magnetic sorting,
1 to 70% by weight of the collected wood and plastic materials that have been separated through the specific gravity sorting, metal oxides, raw dolomite, limestone, marble, meteorite, blast furnace slag,
At least one selected from converter slag, refractory powder, abrasive powder, waste oil, tar, asbestos, papermaking sludge, sludge sludge
Forming sedative for converter slag that uses recovered material from a pachinko machine, which is formed by mixing seeds and pressing.