JP2006075755A - Method for treating car shredder dust - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for treating car shredder dust by which generation of dioxin is suppressed, adhesion of tar and generation of coking is prevented from occurring, and the installation cost, running/maintenance cost or the like is lowered and economical. <P>SOLUTION: A reforming chamber having a supply port of water and/or steam, an oxidizing agent supply port, and a gas discharge port is installed and also a rotating retort 21 made of a metal, almost all surrounded with the reforming chamber 25, and having a plurality of gas discharge holes in the circumferential face is installed. Treatment of car shredder dust is carried out by supplying the dust to the retort for heating and dry distillation; mixing a combustible gas and an oxidizing agent in the reforming chamber; and heating the rotating retort by heat generated by the partial combustion of the combustible gas for the heating and dry distillation. At this time, the oxygen concentration in the reforming chamber is controlled to be 15% by volume or lower and water and/or steam in a weight 0.2 to 3.0 times as much as the weight of organic components is supplied. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for treating car shredder dust, and more specifically, comprises heating and carbonizing car shredder dust generated by dismantling of an automobile to decompose it into a combustible gas and a carbonized mixture, and then reforming the combustible gas. The present invention relates to a method for treating car shredder dust in which generation of dioxins is suppressed.

  Car shredder dust that remains at the end of car dismantling includes fiber, hard and soft, foamed plastics, rubber, cloth / paper / wood, coated conductors, and other miscellaneous items, and is difficult to recycle as parts and materials. It is a waste, and if it is incinerated, it may generate harmful substances such as dioxins. For this reason, recovery of fuel gas and non-ferrous metals such as copper are considered by dry distillation treatment of car shredder dust, and the use of the resulting gas as a heat source for power generation is considered the most practical method. ing.

For example, as a method for treating waste such as car shredder dust, a pyrolysis furnace heated from the outside with high-temperature combustion gas obtained by burning fuel and air is used, and the waste is heated and dry-distilled in an air-blocked state. Pyrolysis process that decomposes into combustible gas and carbonized mixture, gas reforming process that introduces the obtained combustible gas into the gas reformer to lighten heavy components in the combustible gas, combustible There has been proposed a waste treatment method comprising a gas purification step for purifying harmful components such as dust and dioxins contained in gas.
JP 2000-202419 A

  However, it is difficult to say that the above-described waste treatment method sufficiently suppresses the generation of dioxins and the like. And when combustible gas is transferred to a lightening treatment process, there exists a problem that adhesion of a tar part and coking generate | occur | produce on piping. In order to solve this problem, the piping or the like must be heated to 500 to 600 ° C., and an electric heater or the like is required. Furthermore, there is a need for a gas reforming device for lightening the fuel for heating the pyrolysis furnace from the outside and the obtained heavy combustible gas. As a result, there arises a problem that equipment costs and operation / maintenance costs increase.

  The present invention has been made in view of the above circumstances, and its purpose is to suppress the generation of dioxins, to prevent tar content and coking, and to reduce equipment costs, operation and It is an object of the present invention to provide an economical car shredder dust processing method with reduced maintenance costs.

  As a result of various studies, the inventor has developed a gasification furnace including a reforming chamber and a metal rotating retort that is surrounded by the reforming chamber and has a plurality of vent holes on its peripheral surface. Used, supplying car shredder dust to a metal rotating retort, heating and distilling, mixing flammable gas ejected from multiple vent holes and oxidizer in the reforming chamber, and by partial combustion of flammable gas When heating and distilling car shredder dust by heating a metal rotating retort with heat generation, the oxygen concentration in the reforming chamber is controlled below a specified amount, and a specified amount of water and / or steam is reformed in the reforming chamber. Surprisingly, it has been found that the above object can be easily achieved.

  The present invention has been completed on the basis of the above findings, and the gist of the present invention is that the car shredder dust is heated and distilled to decompose it into a combustible gas and a carbonized mixture, and then reforms the combustible gas. In the method for treating shredder dust, a reforming chamber having a water and / or steam supply port, an oxidant supply port, and a gas discharge port, and a plurality of the reformer chamber being surrounded by the reforming chamber and having a plurality of peripheral surfaces Use a gasification furnace equipped with a metal rotating retort with a vent hole, a car shredder dust supply device connected to one end of the metal rotating retort, and a sorter provided at the other end via a discharge device Carshredder dust is supplied to a metal rotating retort and heated to dry distillation, and then mixed with combustible gas and oxidant injected from the vent hole in the reforming chamber. Then, the heating and dry distillation is performed by heating the metal rotating retort with heat generated by partial combustion of the combustible gas. At this time, the oxygen concentration in the reforming chamber is controlled to 15% by volume or less, and further reforming is performed. The present invention resides in a method for treating car shredder dust, characterized in that water and / or steam is supplied in an amount of 0.2 to 3.0 times the amount of organic components in the car shredder dust in the chamber.

  According to the present invention, it is possible to suppress the generation of dioxins, and to obtain a gas with high utility value as a heat source for power generation, without causing tar adhesion or coking to pipes. Furthermore, the fuel required for carrying out heating dry distillation can be remarkably reduced. In addition, it eliminates the need for a gas reformer for reducing the weight of pyrolysis gas and an electric heater to prevent the adhesion of tar and the occurrence of coking, reducing equipment costs, operating and maintenance costs, etc. I can do it.

  Hereinafter, a method for treating car shredder dust according to the present invention will be described with reference to the drawings. FIG. 1 is a view for explaining a car shredder dust processing apparatus according to the present invention. FIG. 2 is an explanatory diagram of the use of the exhausted gas for power generation. FIG. 3 is a diagram for explaining another use of the exhausted gas for power generation. FIG. 4 is a diagram for explaining another use of the exhausted gas for power generation.

  First, a processing apparatus for car shredder dust used in the present invention will be described with reference to FIG. The car shredder dust treatment apparatus is largely modified by a reforming chamber (25) having a water and / or steam supply port (251), an oxidant supply port (252), and a gas discharge port (253). A gasification furnace (20) which is constituted by a metal rotation retort (21) which is surrounded by a quality chamber (25) and which has a plurality of vent holes (H) on its peripheral surface, and a metal rotation retort (21 ) Is connected to one end of a car shredder dust (D), and a sorter (80) is provided at the other end via a discharge device (not shown). .

  The reforming chamber (25) constituting the gasification furnace (20) is normally a fixed type, and water and / or steam supply ports (251) are provided on the car shredder dust supply device side of the reforming chamber (25). ) And an oxidant supply port (252), and a gas discharge port (253) is provided on the discharge device side.

  Most of the metal rotating retort (21) is surrounded by the reforming chamber (25), and the front and rear ends of the metal rotating retort (21) are front and rear hoods ( 22) and (23) are enclosed. A plurality of venting pipes (H) communicating with the reforming chamber (25) are provided on the peripheral surface of the metal rotating retort (21). The gas vent pipe (H) has a straight cylindrical shape protruding toward the metal rotary retort (21) so that the solid content of the metal rotary retort (21) does not fall into the reforming chamber (25). However, a cylindrical shape whose tip is bent in an L shape, preferably an L-shaped tube whose tip extends to a substantially central axis of the metal rotating retort (21), etc., can be mentioned later. As described above, the heavy combustible gas obtained in the metal rotating retort (21) can pass through, but the solid content such as the carbonized mixture is configured not to fall into the reforming chamber (25). If there is, it is not limited to this.

  As the metal rotating retort (21), a metal rotary kiln can be usually used.

  The supply device (10) is for supplying the car shredder dust (D) crushed by the crusher into the metal rotating retort (21). The sorter (80) is for sorting non-ferrous metals such as copper scrap contained in the carbonized mixture (C) obtained by heating carbonization. The gasification furnace (20) used in the present invention includes a crusher (not shown) for crushing the car shredder dust (D), a rotary cooler (not shown) for indirectly cooling the carbonized mixture (C), and a carbonized mixture. You may provide the magnetic separator (illustration omitted) etc. which isolate | separate the iron content contained in (C). If necessary, a reforming device (not shown) for further reforming the combustible gas discharged may be provided.

  Next, the utilization of the discharged gas for power generation will be described with reference to FIGS. A power generation facility (90) shown in FIG. 2 recovers sensible heat of exhausted gas and generates steam to generate a waste heat recovery boiler (91), a steam turbine (92) driven by the obtained steam, and a generator (93). The combustible gas (G2) discharged from the waste heat recovery boiler (91) is purified by the refining device (30) and stored in the gas holder (94).

  The power generation facility (190) shown in FIG. 3 recovers steam by recovering the sensible heat of the gas engine (191), the generator (192), and the exhaust gas using the combustible gas (G2) from the gas holder (94) as fuel. A waste heat recovery boiler (193) to be generated, a steam turbine (194) driven by the obtained steam, and a generator (195) are provided. The power generation facility (290) shown in FIG. 4 includes an air compressor (291), a gas turbine (292) that uses gas from the gas holder (94) as fuel, a generator (293), and exhaust gas from the gas turbine (292). A waste heat recovery boiler (294) that recovers sensible heat to generate steam, a steam turbine (295) driven by the obtained steam, and another generator (296) are provided.

  Next, a method for treating car shredder dust according to the present invention will be described. The treatment method of the present invention uses the gasification furnace described above, supplies car shredder dust to a metal rotating retort, heats and distills, mixes a combustible gas and an oxidant in a reforming chamber, and combustible. When performing the heating and dry distillation by heating a metal rotating retort with heat generated by partial combustion of gas, the oxygen concentration in the reforming chamber is controlled to 15% by volume or less, and further, car shredder dust is contained in the reforming chamber. This is a method of supplying 0.2 to 3.0 times by weight of water and / or steam with respect to the amount of organic components therein.

  First, the car shredder dust (D) is supplied from the supply device (10) to the metal rotating retort (21). In the metal rotating retort (21) heated from the outside, combustible gas (G1) and carbonized mixture (C) are generated by heating and dry distillation of the car shredder dust (D). The generated combustible gas (G1) is jetted into the reforming chamber (25) from the gas vent hole (H) provided on the peripheral surface of the metal rotating retort (21). The ejected combustible gas (G1) includes an oxidant (OG) supplied from the oxidant supply port (252) and water and / or steam supplied from the supply port (251) in the reforming chamber (25). At the same time, at least a portion of the combustible gas is combusted, and a water gasification reaction occurs to lighten and reform the combustible gas (G1). And metal rotation retort (21) is heated by the partial combustion of the above-mentioned combustible gas, and the above-mentioned heating dry distillation is performed.

  Car shredder dust, which is the object to be treated of the present invention, is waste that remains at the end of car dismantling, including fiber, hard and soft, foamed plastics, rubbers, cloth, paper, wood, coated conductors, and other miscellaneous items Is included.

  Examples of the oxidizing agent used in the present invention include oxygen gas or oxygen-containing gas, and specific examples include air, oxygen, and oxygen-enriched air. Note that “at least a part of combustion” and “partial combustion” include complete combustion of combustible gas.

  In the present invention, the oxygen concentration in the reforming chamber is controlled to 15% by volume or less, and further 0.2 to 3.0 times by weight of water in the reforming chamber with respect to the amount of organic components in the car shredder dust. It is important to supply steam and / or steam.

  The amount of the oxidant supplied from the oxidant supply port (252) to the reforming chamber (25) is adjusted to control the oxygen concentration in the reforming chamber (25) to 15% by volume or less. If the oxygen concentration in the reforming chamber (25) exceeds 15% by volume, a large-volume gasification furnace is required, which is not economical.

  In particular, when the proportion of the organic component in the car shredder dust in the absolutely dry state is 50% by weight or more, the oxygen concentration in the reforming chamber (25) is usually 5% by volume or less, preferably 3% by volume or less, more preferably. Is 1% by volume or less. When the proportion of the organic component in the car shredder dust in the absolutely dry state is less than 50% by weight, the oxygen concentration in the reforming chamber (25) is usually 5 to 15% by volume, preferably 7 to 15% by volume, more preferably Is 10-15% by volume.

  In order to suppress the generation of dioxins in the reforming chamber (25), it is necessary to completely burn the combustible gas. Therefore, generation of dioxins can be suppressed by increasing the amount of oxidant supplied to the reforming chamber (25) and completely burning the combustible gas. However, when the proportion of the organic component in the car shredder dust increases, naturally the amount of combustible gas also increases, and the amount of oxidant and the amount of steam supplied also increase. As a result, a large volume metal rotating retort and a reforming chamber are required, which is not economical.

  Therefore, when the proportion of the organic component in the car shredder dust in the absolutely dry state is 50% by weight or more, the amount of combustible gas required to supply the amount of heat necessary for heating and dry distillation of the car shredder dust is combusted. And most combustible gas is discharged from the gas outlet (253) without being burned, lightened or reformed, and completely burned in a combustion furnace (not shown) newly provided in a later process. Alternatively, lightening or reforming is performed by a reformer (not shown). Therefore, the amount of the oxidant supplied to the reforming chamber (25) is an amount required for combustion of the combustible gas to supply the amount of heat necessary for heating and dry distillation of the car shredder dust, 25) is such an amount that the oxygen concentration is usually 5% by volume or less.

  When the proportion of the organic component in the car shredder dust in the absolutely dry state is less than 50% by weight, the generated combustible gas is completely burned in the reforming chamber (25). Therefore, the amount of the oxidant supplied to the reforming chamber (25) is an amount required to completely burn the combustible gas, and the oxygen concentration in the reforming chamber (25) is usually 5 to 15 volumes. %.

  The amount of water and / or steam supplied into the reforming chamber (25) is 0.2 to 3.0 times by weight, preferably 1.0 to 3.0 times the amount of organic components in the car shredder dust. Weight times. When the amount of water and / or steam is less than 0.2 times by weight, it is difficult to suppress the generation of dioxins, and the concentration of dioxins in the exhaust gas discharged from the gas discharge port (253) increases. . When the amount of water and / or steam exceeds 3.0 times by weight, a large-volume gasifier is required, which is not economical.

  By supplying water and / or steam (S), the combustible gas in the reforming chamber (25) causes a water gas reaction, and the combustible gas (G1) is lightened and reformed. Furthermore, even if the configuration and properties of the car shredder dust (D) fluctuate, the amount of water gas reaction and the heat generation associated therewith are changed by increasing or decreasing the amount of water and / or steam (S) supplied to the reforming chamber (25). Since the amount and the heating amount can be easily adjusted, the operation can be stabilized without running out of control and discharged from the metal rotating retort (21) with insufficient heating and dry distillation, The metal rotating retort (21) is not excessively heated.

  Further, since the gas is diluted by water introduced into the reforming chamber (25) and / or steam from the steam (S), polymerization and tarification of the combustible gas (G2) are suppressed, and the combustible gas The tar and coke are gasified by the lightening, and the coking progress speed on the inner surface of the reforming chamber (25) is suppressed. Therefore, the light flammable gas (G2) discharged from the reforming chamber (25) does not cause tar adhesion or coking on the piping in the middle of being transported to the refining device (30). As a result, the burden of piping heating equipment and operation and maintenance is greatly reduced, and purification becomes easier.

  The amount of water and / or steam (S) supplied to the reforming chamber (25) is controlled by a control system (40) that maintains the outer surface temperature of the metal rotating retort (21) within a predetermined temperature range. This operation stabilization control includes heat generation due to partial combustion of heavy combustible gas (G1) and endothermic (vaporization and heating) due to water gas reaction with water and / or steam from steam (S). Is used). The stabilization of operation is not only the supply amount of water and / or steam (S), but also the supply amount of oxidant (OG) to the reforming chamber (25), oxidation to the metal rotating retort (21). It is also possible to adjust the supply amount of the agent (OG) and the supply amount of the car shredder dust dust (D).

  In the present invention, the temperature in the reforming chamber (25) is usually 600 to 750 ° C., preferably 600 to 650 ° C., and the temperature in the metal rotating retort (21) where car shredder dust is heated and distilled is Usually, it is 450-550 degreeC, Preferably it is 500-550 degreeC. The pressure in the reforming chamber (25) is adjusted so that the heavy combustible gas (G1) generated in the metal rotating retort (21) can be ejected into the reforming chamber (25). It is kept slightly lower than the gas pressure in the retort (21). In the reforming chamber (25), the heavy combustible gas (G1) is mixed with the oxidant (OG) and partially burned, mixed with the steam (S) and converted into water gas, and is generated along with the reaction. Heat is transmitted from the outside of the metallic rotating retort (21) to the car shredder dust (D). The gas (G2) in the reforming chamber (25) is discharged from the gas discharge port (253).

  The oxygen concentration in the metal rotating retort (21) is usually 3% by volume or less, preferably 1% by volume or less, more preferably 0.5% by volume or less. When the oxygen concentration exceeds 3% by volume, it becomes difficult to suppress the generation of dioxins, and the concentration of dioxins in the exhaust gas becomes high.

  Car shredder dust is usually heated and distilled in an air-blocked state, and the oxygen concentration in the metal rotating retort (21) is 0% by volume. However, when oxygen is contained in the raw car shredder dust, it may be present as oxygen gas in the combustible gas (G1) in the metal rotating retort (21) due to thermal decomposition during heating and dry distillation. is there. And when the temperature in metal rotation retort (21) is higher than the ignition temperature of combustible gas (G1), produced | generated oxygen gas burns combustible gas (G1) for the oxygen equivalent (partial combustion) Let

  When the temperature in the metal rotating retort (21) is lower than the ignition temperature of the combustible gas (G1), the oxygen concentration is not 3 because the oxygen gas is not consumed by the combustion of the combustible gas (G1). May exceed volume%. In this case, the temperature in the metal rotating retort (21) is made higher than the ignition temperature of the combustible gas (G1), and the oxygen gas is consumed by partial combustion of the combustible gas (G1). It is preferable that the oxygen concentration in the rotating retort (21) is 3% by volume or less.

  Due to the partial combustion in the metal rotary retort (21), tar and coke adhering to the inner surface of the metal rotary retort (21) are also burned. Note that although it is small, the amount of heat transmitted from the outside of the metallic rotating retort (21) is reduced by the amount of heat generated by partial combustion in the metallic rotating retort (21). Therefore, the temperature of the metal rotating retort (21) can be kept low, the burden on it (heat resistance of the material) is reduced, and the use of a material with low heat resistance becomes possible. Further, the combustible gas (G1) generates tar and coke in the metal rotating retort (21) by dilution with steam and other gases generated by the partial combustion and / or water gas reaction with steam. In addition to being suppressed, the coking progress rate is suppressed, and the continuous operation period can be extended.

  According to the present invention, the heat necessary for gasifying the car shredder dust (D) in the metal rotating retort (21) is sufficiently covered by the partial combustion of the heavy combustible gas (G1) in the reforming chamber (25). Therefore, the refined and expensive fuel is almost unnecessary. Moreover, a carbonized mixture containing a light flammable gas (G2) and a useful nonferrous metal (G2) that can be easily handled and stored from the car shredder dust (D) and can also be used as a fuel for gas turbines, boilers, etc. C) is obtained.

  Since the carbonized mixture (C) discharged from the metal rotating retort (21) is not melted and easily collapses, non-ferrous metals such as copper wire scraps that have not been oxidized in a reducing atmosphere are treated with wind and water. It can be easily collected by a sorter (80) using a specific gravity difference such as straw. Moreover, since sulfur and chlorine are fixed to ash in the carbonized mixture (C), the amount of sulfur and chlorine contained in the light combustible gas (G2) is very small. HCl generated from vinyl chloride resin and the like is contained in the light flammable gas (G2), but is easily absorbed and removed by the basic solution, so that the flammable gas (G2) is easily purified and discharged. The problem of environmental pollution caused by is solved at once.

  In FIG. 2, since the gas exhausted from the reforming chamber (25) is at a high temperature, the sensible heat is recovered to obtain steam regardless of flammability and nonflammability, and is used for power generation. For example, in the waste heat boiler (91), steam is generated using the sensible heat of the gas discharged from the reforming chamber (25), the steam turbine (92) is driven, and power is generated by the generator (93). . When the gas discharged from the reforming chamber (25) is flammable, the sensible heat is recovered and purified, and then stored in the gas holder (94). The obtained electric power can be effectively used for, for example, car dismantling work in which the load electric power fluctuates drastically, and the power cost can be reduced.

  In FIG. 3, the combustible gas (G2) stored in the gas holder (94) is used as fuel, the gas engine (191) is driven, and the generator (192) generates electric power. Then, steam is generated by the waste heat recovery boiler (193) using the sensible heat of the exhaust gas obtained from the gas engine (191), the steam turbine (194) is driven, and power is generated by the generator (195). .

In FIG. 4, when the gas discharged from the reforming chamber (25) is flammable, the gas engine (191) or the gas turbine (292) is driven using the flammable gas (G2) directly as fuel. Then, power is generated by the generator (293). Then, steam is generated in the waste heat recovery boiler (294) using the sensible heat of the exhaust gas obtained from the gas engine (191) or the gas turbine (292), the steam turbine (295) is driven, and the generator ( 296).

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the summary is exceeded.

Example 1:
Car shredder dust (ASR) remaining at the end of car dismantling as a raw material was processed in the following manner using the processing apparatus shown in FIG.

  The above raw materials are supplied from the supply device (10) to the metal rotating retort (21), steam is supplied from the supply port (251) to the gasification furnace (20), and the oxidant supply port (252) is gasified. It supplied to the furnace (20) and heat-distilled. Table 1 shows the operating conditions of the gasifier (20), and Table 2 shows the composition of the exhaust gas from the gas outlet (253).

  The dust concentration, nitrogen oxide concentration, sulfur oxide concentration, hydrogen chloride concentration, and dioxin concentration in Table 2 were measured by the following methods.

  (1) The dust concentration was determined according to the method described in JIS Z 8808.8. (2) The nitrogen oxide concentration was determined according to the method described in JIS K 0104.4.2. (3) The sulfur oxide concentration was measured in accordance with the method described in JIS K0103.6.1. (4) The hydrogen chloride concentration was determined according to the method described in JIS K 0107.6.2. The concentration of dioxins was determined according to the method described in the “Manual for Standard Measurement and Analysis of Dioxins in Waste Disposal” (Environmental Maintenance Division, Department of Health and Welfare, February 1997).

The figure explaining the processing device of car shredder dust Diagram explaining the use of discharged gas for power generation Diagram explaining another use of exhausted gas for power generation A diagram explaining other uses of discharged gas for power generation

Explanation of symbols

10: Supply device
20: Gasification furnace 21: Metal rotating retort 22: Hood 23: Hood 25: Reforming chamber 30: Refiner 40: Control system 80: Non-ferrous metal sorter 90: Power generation equipment 91: Waste heat recovery boiler 92: Steam Turbine 93: Generator 94: Gas holder 190: Power generation equipment 191: Gas engine 192: Generator 193: Waste heat recovery boiler 194: Steam turbine 195: Generator 251: Supply port 252: Oxidant supply port 253: Gas discharge port 290 : Power generation equipment 291: Air compressor 292: Gas turbine 293: Generator 294: Waste heat recovery boiler 295: Steam turbine 296: Generator C: Carbonized mixture D: Car shredder dust G1: Heavy combustible gas G2: Light combustible Gas H: Gas vent hole OG: Oxidizing agent S: Water and / or steel

Claims (6)

  A water and / or steam supply port and an oxidant supply port in a method for treating a car shredder dust comprising reforming a combustible gas after heating and carbonizing the car shredder dust to decompose it into a combustible gas and a carbonized mixture And a reforming chamber having a gas exhaust port, and a metal rotating retort, most of which is surrounded by the reforming chamber and having a plurality of vent holes on its peripheral surface. Using a gasifier equipped with a shredder dust supply device and a sorter at the other end via a discharge device, supplying car shredder dust to a metal rotating retort, heating and dry distillation, reforming chamber Combustible gas jetted from the vent hole and oxidant are mixed, and the metal rotating retort is heated by heat generated by partial combustion of the combustible gas. In this case, the oxygen concentration in the reforming chamber is controlled to 15% by volume or less, and further, the amount of organic components in the car shredder dust is 0.2% in the reforming chamber. A method for treating car shredder dust, characterized by supplying water and / or steam in an amount of up to 3.0 times by weight.   The method for treating car shredder dust according to claim 1, wherein the oxygen concentration in the metal rotating retort is controlled to 3% by volume or less.   The method for treating car shredder dust according to claim 1, wherein the exhaust gas discharged from the reforming chamber is used for power generation.   The method for treating car shredder dust according to claim 3, wherein a part of the sensible heat of the gas discharged from the reforming chamber is recovered to produce steam for driving the steam turbine.   The method for treating car shredder dust according to claim 3, wherein the exhaust gas discharged from the reforming chamber is used as a fuel for a gas engine or a gas turbine.   The method for treating car shredder dust according to claim 1, wherein non-ferrous metal is sorted from the carbonized mixture by a sorter.