JP2015147985A - Apparatus and method for recovering/treating valuable metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for recovering/treating valuable metals, in each of which recycling of noble metals can be facilitated, deterioration of durability of a first treatment furnace due to superheating can be prevented and risks of generation of dioxin or ignition of incineration ash can be prevented beforehand.SOLUTION: The apparatus for recovering/treating valuable metals includes: a first treatment furnace 10; a second treatment furnace 21a for burning a gasified and volume-reduced material; a third treatment furnace 21b for burning combustible pyrolysis gas; a water seal type conveyor 30 for cooling/conveying incineration ash 2c of noble metal scraps 2a; temperature measuring means 17 for measuring the inside temperature of the second treatment furnace; water spraying means 18 for spraying water toward a discharge port of the first treatment furnace; control means 20 for actuating the water spraying means 18 so that the inside temperature of the second treatment furnace is kept within a predetermined range. When the inside temperature measured by the temperature measuring means 17 becomes equal to or higher than the predetermined temperature, cooling water is sprayed toward the inside of the second treatment furnace 21a by the water spraying means 18 so that the inside temperature of the second treatment furnace is kept within the predetermined range.

Description

  The present invention relates to an apparatus and method for recovering valuable metals, and more specifically, an electronic component containing valuable metals such as copper, gold, and platinum, for example, electronic boards such as personal computers and mobile phones, or OA equipment. The present invention relates to a valuable metal recovery processing apparatus and method for recovering valuable metals from precious metal scraps recovered from waste OA scraps that have been crushed and magnetically selected.

  In recent years, electronic parts manufacturers that manufacture personal computers, office automation equipment, mobile phones, etc., and products that use electronic parts such as electronic boards and scraps generated from industries continue to increase year by year. These scraps contain copper used as electrical conductors and precious metals such as gold, silver, platinum, and palladium used for contacts and plating films, etc. These valuable metals can be recovered by recycling resources. It is extremely important from the viewpoint of resource recycling. Therefore, these scraps (hereinafter referred to as “precious metal scrap”) are recycled by various methods.

  As a method of recycling precious metal scrap, for example, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2003-64425), a method of charging and processing copper smelting with a copper concentrate in a smelting furnace in copper smelting, , Method of obtaining precious metal by dissolving precious metal scrap in chemicals by dissolving the organic material, burning precious metal scrap in a combustion furnace to make it incinerated, and processing the incinerated one in flash furnace or converter There is a method of obtaining a precious metal by doing.

  In Patent Document 1, since the conventional method of treating precious metal scrap by burning it in a combustion furnace is continuously performed until it is put into a rotary kiln that is a combustion furnace and discharged, there is a risk that precious metal scrap will be burned out. Because there is a problem such as requiring a large space in the processing equipment, precious metal scrap is burned at 400 ° C in a pretreatment furnace with a rotation / mixing mechanism to make it ash and then incinerated by sandy powder. Proposals have been made.

  On the other hand, as a combustion treatment furnace in which a rotary kiln and a stoker furnace are combined, there are, for example, Patent Document 2 (JP-A-10-267239) and Patent Document 3 (JP-A-9-159131).

  Moreover, in patent document 4 (Unexamined-Japanese-Patent No. 2009-222288), precious metal scrap is thermally decomposed and gasified, and the gasification volume reduction thing which is the residue after gasifying is further combusted in a 2nd processing furnace. Thus, there has been proposed a precious metal scrap processing method and apparatus for recycling precious metals by using incinerated ash containing precious metals as an intermediate raw material of a copper smelter.

JP 2003-64425 A Japanese Patent Laid-Open No. 10-267239 JP 9-159131 A JP 2009-222288 A

However, in the conventional processing method and processing apparatus, SiO ₂ , CaO, Al ₂ O ₃ , Cu, Fe, etc. contained in the precious metal scrap melt when the furnace temperature of the rotary kiln that is the first combustion furnace exceeds 1000 ° C. This may cause clinker. When the clinker grows, it becomes a large lump and adheres to the rotary kiln exit and to the stoker furnace grate, hindering the movement of the gasification volume to the stalker furnace and the movement of the stoker furnace grate. There is a risk that inconveniences such as reduction of the operation efficiency due to forced removal work occur. Further, when the ash is continuously collected by the conveyor and the clinker falls as a large lump, the conveyor may be clogged or damaged, and the operation may be interrupted.

  Moreover, in the conventional processing method and processing apparatus, the processing ash is collected by the recovery box. However, since the recovery by the recovery box is a batch type, the processing ash is continuously used for more efficient operation. It is preferable that it can be recovered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a valuable metal recovery apparatus and method that can suppress the generation of clinker to maintain proper operation and can continuously recover treated ash.

  In order to solve the above problems, the present invention according to claim 1 is a first processing furnace for pyrolyzing and gasifying precious metal scrap containing valuable metals such as copper, gold, and platinum, and a first processing furnace. Was generated in the first treatment furnace, and the second treatment furnace further combusting the gasification volume reduction material, which is the residue after gasifying the metal scrap in the first treatment furnace Measures the temperature in the second processing furnace in a valuable metal recovery processing device that is equipped with a third processing furnace that completely burns combustible pyrolysis gas and combustion exhaust gas generated in the second processing furnace Measured with a thermometer, a temperature measuring means, a watering means provided in the second processing furnace, for cooling the inside of the second processing furnace by spraying cooling water toward the discharge port of the first processing furnace The watering means is activated when the measured temperature exceeds the specified temperature, Characterized in that a control means for holding the degree in a predetermined range.

  In order to solve the above-mentioned problem, the present invention described in claim 2 is the valuable metal recovery processing apparatus according to claim 1, wherein the temperature measuring means includes a second measuring device near the outlet of the first processing furnace. It is arranged in a processing furnace.

  In order to solve the above-mentioned problem, the present invention described in claim 3 is the valuable metal recovery processing apparatus according to claim 1 or 2, wherein the first processing furnace is a kiln and the watering means is at the center of the kiln. It is characterized by spraying cooling water toward it.

  In order to solve the above-mentioned problem, the present invention described in claim 4 is a processing ash that is combusted by the second processing furnace in the valuable metal recovery processing device according to any one of claims 1 to 3. It is characterized by comprising a water-sealed conveyor that continuously conveys and recovers the water while cooling in the water tank.

  In order to solve the above-mentioned problems, the present invention according to claim 5 is characterized in that noble metal scrap recovered from electronic parts including valuable metals such as copper, gold and platinum is thermally decomposed by heating in a first processing furnace. Gasification and gasification, and the gasified reduced volume that is the residue after gasification is burned in the second treatment furnace connected to the discharge port of the first treatment furnace, and the treated ash after the combustion treatment is In the recovery process for valuable metals, which is recovered as valuable metal-containing soot and gasified combustible pyrolysis gas is completely combusted in the third processing furnace, the temperature in the second processing furnace is measured by the temperature measuring means. When the temperature in the furnace measured by the temperature measuring means becomes a predetermined temperature or higher, the cooling water is sprayed into the second processing furnace by the watering means and held in a predetermined range. To do.

  In order to solve the above-mentioned problem, the present invention according to claim 6 is the method for recovering valuable metal according to claim 5, wherein the temperature measurement by the temperature measuring means is performed in the vicinity of the outlet of the first processing furnace. The temperature in the second processing furnace is measured, and when the temperature reaches 980 ° C. or higher, at least the furnace is sprinkled by spraying cooling water toward the outlet of the first processing furnace by watering means. The internal temperature does not exceed 1000 ° C.

  In order to solve the above-mentioned problems, the present invention according to claim 7 is the method for recovering valuable metals according to claim 5 or 6, wherein the treated ash burned in the second processing furnace is a water-sealed conveyor. It is characterized by continuously transporting and collecting while cooling in the water tank.

  According to the valuable metal recovery processing apparatus and method according to the present invention, the temperature in the second processing furnace for burning the gasification reduced product, which is a residue after gasifying the metal scrap, is measured by the temperature measuring means. When the temperature exceeds a predetermined temperature, the water spraying means is operated and the cooling water is sprayed toward the discharge port of the first processing furnace to cool the inside of the second processing furnace. Since the temperature is maintained within a predetermined range, the generation of clinker can be suppressed. This eliminates the need for clinker removal work and prevents a decrease in operating efficiency, and also has the effect of not inhibiting the movement of the gasification and volume reduction material to the stalker furnace and the movement of the grate of the stalker furnace. .

  Further, according to the valuable metal recovery processing apparatus and method according to the present invention, since the grown clinker is not likely to fall as a large lump, the treated ash can be continuously recovered without damaging the conveyor. There is an effect.

It is a block diagram of one Embodiment of the collection processing apparatus of the valuable metal which concerns on this invention. It is a longitudinal cross-sectional view of a rotary kiln, a stoker furnace, and a secondary combustion furnace. It is a block diagram which shows the structure of furnace cooling. It is a flowchart of one Embodiment of the collection processing method of the valuable metal which concerns on this invention. It is a flowchart which shows the temperature control in a rotary kiln. It is a flowchart which shows the temperature control of a secondary combustion furnace.

  Hereinafter, a valuable metal recovery processing apparatus and method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of a valuable metal recovery processing apparatus according to the present invention. The illustrated valuable metal recovery processing apparatus 1 (hereinafter referred to as “processing apparatus 1”) generally includes a rotary kiln 10 as a first processing furnace, a stoker furnace 21a as a second processing furnace, and a third processing furnace. The secondary combustion furnace 21b which is a processing furnace is provided.

  The rotary kiln 10 is provided with a cylindrical horizontal rotary furnace 11, provided with an input port 12 for supplying precious metal scrap 2 a on one end surface, and provided with an exhaust port 13 on the opposite end surface. ing. The rotary furnace 11 is arranged so as to be slightly inclined toward the discharge port 13 and can be rotated by a motor (not shown). A burner 14 is disposed in the vicinity of the inlet 12, and a fuel such as heavy oil is burned to blow out a flame toward the inside of the furnace, thereby heating the inside of the furnace. In addition, since the gasification by thermal decomposition of the metal scrap 2a proceeds continuously, it is not always necessary to use the burner 14, but when the furnace temperature is lowered, the burner 14 is used to keep the furnace at a high temperature. A cooling water spray nozzle 15 for spraying cooling water into the furnace is disposed in the vicinity of the inlet 12, and a thermometer 15 a for measuring the furnace temperature is attached in front of the furnace wall of the rotary furnace 11. Yes. The operations of the cooling water spray nozzle 15, the thermometer 15a, and the burner 14 are controlled by a control device 20, which will be described later, as shown in FIG. When incinerating general industrial waste or the like, the furnace temperature is generally kept at a high temperature of 800 ° C. or higher. In the present invention, the precious metal scrap 2a is not burned, but will be described later. As described above, the precious metal scrap 2a is pyrolyzed and gasified by maintaining the temperature in the furnace at 550 to 650 ° C. while preventing free air from entering the furnace. The precious metal scrap 2a charged into the furnace from the charging port 12 gradually moves toward the discharge port 13 while being stirred in a high temperature atmosphere, and is thermally decomposed to reduce combustible pyrolysis gas and gasification. It becomes the contents 2b.

  Here, the precious metal scrap 2a to be charged into the rotary kiln 10 is pulverized to a predetermined size by a pulverizer (not shown) and stored. It is cut out and is put into the rotary furnace 11 through the bucket conveyor 5 and the charging chute 7. Further, the charging method into the rotary furnace 11 may be quantitative cutout using a crane bucket or the like.

  The end surface of the rotary furnace 11 on the discharge port 13 side is connected to the stalker furnace 21a, and the gasification volume-reduction product 2b discharged from the discharge port 13 is referred to as a grate (stoker: hereinafter referred to as “grate”) of the stalker furnace 21a. ) 22 and 22, the pyrolysis gas is introduced into the secondary combustion furnace 21 b as the third processing furnace. The rotary kiln 10 of the rotary kiln 10 according to the present invention has a shorter length than a general one. Specifically, the length of the rotary kiln 11 is 1.5 to 2 times the inner diameter when compared with the inner diameter. It is a rotary furnace 11 of 5 times short type. Moreover, the rotational speed of the rotary furnace 11 is configured to be able to be rotated in a range of at least 0.1 to 0.5 rpm by a speed reducer (not shown), and by processing at such a rotational speed, the precious metal scrap 2a It is possible to prevent a short pass and to carry out thermal decomposition by holding about 40 in the rotary furnace 11.

  In addition, the sealing member 16 is firmly inserted into the connecting portion between the rotary furnace 11 and the stoker furnace 21a so that free air does not enter. The seal member 16 is a ring-shaped packing member. The seal member 16 is pressed by a seal ring (not shown) to urge the seal member 16, and even when the seal member 16 is worn by the rotation of the rotary furnace 11, the gaps are sequentially formed. Filling always ensures a complete seal. As a result, the air ratio with respect to the precious metal scrap 2a in the rotary furnace 11 is kept at 0.45 or less to promote thermal decomposition.

  The stalker furnace 21a is a combustion furnace that performs a combustion process on the gasified volume-reduced material 2b supplied onto the grate 22, 22 while blowing air from the lower side of the grate 22, 22, and radiant heat from the furnace wall or flame. Or incineration of the gasified volume-reduced product 2b by contact heat transfer with combustion gas. A part of the grate 22, 22 is moved by a hydraulic cylinder 25, and the gasification volume reducing substance 2b is combusted while being sequentially transferred to the downstream side by the grate 22, 22. In addition, although the grate 22,22 is arrange | positioned horizontally, you may incline. Thereby, the gasification volume-reduction thing 2b discharged | emitted from the rotary furnace 11 falls on the grate 22,22 of the stoker furnace 21a, and is combusted, moving to a downstream side one by one. Meanwhile, air is sent from below the grate 22 and 22 to promote complete combustion of substances other than the noble metal contained in the gasification-reduced product 2b. The incinerated ash 2c after combustion is recovered while being cooled as a valuable metal-containing soot by a water-sealed conveyor 30 disposed on the lower side. In addition, the gasified and reduced material 2 b spilled from the grate 22, 22 is also collected by the water-sealed conveyor 30 on the lower side of the grate 22, 22.

  The water-sealed conveyor 30 is a conveyor that cools and conveys the burned incineration ash 2c and the gasification reduced material 2b spilled from the grate 22, 22, and is a sprocket disposed at both ends in the housing 31. The chain 34 spans 33a and 33b, and a plurality of scrapers 32 and 32 attached to the chain 34. The housing 31 is provided with a watertight water-sealed portion 31a in which cooling water is stored, and reliably cools the incinerated ash 2c that has been subjected to combustion processing and the gasified and reduced product 2b that has spilled from the grate 22, . A water absorption nozzle 37 is disposed on the upper side of the water sealing portion 31a, and a drainage nozzle 38 is disposed on the lower side of the housing 31, so that the cooling water is circulated effectively. Further, the housing 31 is inclined so that the discharge side is positioned higher than the water surface of the cooling water, and the incinerated ash 2c and the like cooled by the water-sealed conveyor 30 are further conveyed to a predetermined place by the transfer conveyor 39. It has become so. The incineration ash 2c and the like are cooled so that the temperature of at least the incineration ash 2c and the like is about 100 ° C. or lower by appropriately adjusting the conveyance speed and the like. Thereby, the incinerated ash 2c is continuously collected and prevented from burning out again. The recovered incinerated ash 2c is used as an intermediate raw material of a copper smelter, for example, so that the precious metal contained in the precious metal scrap is recycled.

  On the other hand, the combustible pyrolysis gas generated by pyrolyzing the precious metal scrap 2a is introduced into the secondary combustion furnace 21b located at the upper part of the stoker furnace 21a, and the burner 24 provided in the secondary combustion furnace 21b. Is completely burned. Further, the combustion exhaust gas generated when the gasification-reduced product 2b is incinerated in the stoker furnace 21a is also sent to the secondary combustion furnace 21b and completely combusted with the pyrolysis gas. Here, it is known that generation of dioxins in an incinerator can be suppressed by decomposing dioxins and their precursors at a high temperature by performing stable complete combustion. Therefore, combustion of pyrolysis gas is performed at a temperature of 900 ° C. or higher.

  A thermometer 17 is disposed in the stoker furnace 21 a near the outlet of the rotary furnace 11, and a watering device 18 for spraying cooling water toward the discharge port 13 of the rotary furnace 11 is provided. As in the cooling water spray nozzle 15 and the thermometer 15a described above, the operation of the thermometer 17 and the water spray device 18 is controlled by the control device 20 as shown in FIG. For example, when it is detected that the temperature of the thermometer 17 installed in the stoker furnace 21 a exceeds 980 ° C., the control device 20 operates the watering device 18 to supply cooling water toward the discharge port of the rotary furnace 11. It sprays and it controls so that the temperature in the stoker furnace 21a does not exceed at least 1000 degreeC. Thereby, it is possible to prevent the clinker from adhering to the rotary furnace 11 or to the grates 22 of the stoker furnace 21a described later. The control device 20 can be configured by a known computer that processes a program stored in a storage medium by a central processing unit. And the exhaust gas after burning pyrolysis gas is sent to the cooling tower 40 connected with the secondary combustion furnace 21b by the flue 31.

  The cooling tower 40 is provided with a plurality of nozzles 41 for spraying the cooling water. The cooling water is ejected from the nozzles 41 and sprayed toward the exhaust gas carried through the flue 31 to reduce the exhaust gas. Cool at once so that the temperature is 80 ° C. or lower. It is said that de novo synthesis, which is one of the causes of dioxin generation, is most likely to occur at around 300 ° C., and the generation of dioxins is suppressed by allowing it to pass at once without staying in the temperature range for a long time. The exhaust gas cooled to 80 ° C. or lower is washed with an alkaline washing liquid in the washing tower 45 and further conveyed to the mist cot rel 50 through the duct 32. The exhaust gas is exhausted through the exhaust duct 33 in a completely detoxified state after dust and mist are removed by the mist cot rel 50. In addition, although the processing apparatus 1 which combined the rotary kiln and the stoker furnace was demonstrated as preferable embodiment, it is not limited to this, For example, a 1st processing furnace is set to said kiln type gasification melting furnace, flow A bed type gasification melting furnace, a shaft furnace gasification melting furnace, or the like can be used. In addition to the above-described stoker furnace, a fluidized bed furnace or the like can also be used.

  Next, the valuable metal recovery processing method according to the present invention will be described together with the operation of the processing apparatus 1 described above. FIG. 4 is a flowchart of an embodiment of the valuable metal recovery processing method according to the present invention.

  First, the precious metal scrap 2a is preliminarily pulverized and stored in a predetermined size by a crusher (not shown). Through the rotary furnace 11 of the rotary kiln 10 which is the first processing furnace (step S1).

  The temperature inside the rotary furnace 11 is previously set to 550 to 650 ° C. by the burner 14, and the precious metal scrap 2 a introduced from the inlet 12 is prevented from entering free air in such a high temperature atmosphere. However, it is thermally decomposed by holding for about 40 minutes, and becomes a combustible pyrolysis gas and a gasification volume-reduction product 2b (step S2). Even if the burner 14 is extinguished in the rotary furnace 11, the thermal decomposition of the noble metal scrap 2a proceeds continuously, so that the temperature in the furnace is maintained at 550 to 650 ° C. The temperature in the furnace is always monitored by a thermometer 15a provided in the rotary furnace 11, and the temperature in the furnace is controlled as follows. That is, as shown in FIG. 5, when the noble metal scrap 2a is thrown into the rotary kiln 10, the thermal decomposition of the noble metal scrap 2a proceeds continuously (step S10). When the furnace temperature measured by the thermometer 15a deviates from 550 to 650 ° C. (step S11) and the furnace temperature is 650 ° C. or higher (step S12), the control device 20 is cooled. The water spray nozzle 15 is operated to spray cooling water into the rotary furnace 11 to cool the inside of the furnace (step S13). If the furnace temperature reaches 550 to 650 ° C. due to the cooling water spraying, the cooling water spraying is terminated and the process is maintained (step S15). On the other hand, when the furnace temperature is 550 ° C. or lower, the control device 20 ignites the burner 14 (step S14) to raise the furnace temperature. If the furnace temperature reaches 550 to 650 ° C. due to ignition of the burner 14, the burner 14 is stopped and the process is maintained (step S15).

  The rotary furnace 11 is a short type kiln whose length is 1.5 to 2.5 times the internal diameter and shorter than a normal one, and is 0.1 to 0.5 rpm at the time of thermal decomposition of the precious metal scrap 2a. The precious metal scrap 2a is kept in the rotary furnace 11 for about 40 minutes to perform sufficient thermal decomposition. The gasification volume-reduction product 2b is gradually moved in the direction of the discharge port 13 by the rotation of the rotary furnace 11 and a slight inclination thereof, and is discharged onto the grates 22 and 22 in the stoker furnace 21a which is the second processing furnace. The On the other hand, combustible pyrolysis gas is introduced into the secondary combustion furnace 21b located at the upper part of the stoker furnace 21a.

  Next, the metal scrap 2a pyrolyzed by the rotary kiln 10 is sent to the stoker furnace 21a as a gasification reduced volume 2b, and moves downstream while being further burned on the grate 22,22. In the meantime, air is sent from below the grate 22 and 22 to promote complete combustion of combustible substances other than noble metals contained in the gasification-reduced product 2b (step S3). At this time, as shown in FIG. 6, in order to measure the temperature in the stoker furnace 21a in which the gasification volume reduction material 2b (step S20) thrown into the furnace is subjected to combustion treatment, it is arranged near the outlet of the rotary furnace 11. When the in-furnace temperature measured by the thermometer 17 exceeds 980 ° C. (step S21), the controller 20 operates the sprinkler 18 to spray cooling water toward the outlet of the rotary furnace 11 (step S22). Then, the temperature in the stoker furnace 21a is maintained so as not to exceed at least 1000 ° C. (step S23). The incinerated ash 2c after combustion is dropped as a valuable metal-containing soot on a water-sealed conveyer 30 that stores cooling water in an interior disposed on the lower side, and is continuously conveyed by a plurality of scrapers 32 and 32 and collected. (Step S4). Since the incinerated ash 2c is cooled to 100 ° C. or less by the water-sealed conveyer 30, it is reliably prevented that the incinerated ash 2c comes into contact with the air and reburns. And the precious metal contained in precious metal scrap is collect | recovered and recycled by using the collect | recovered incineration ash 2c as an intermediate raw material of a copper smelter, for example.

  On the other hand, the combustible pyrolysis gas is combusted at a temperature of 900 ° C. or higher by the burner 24 of the secondary combustion furnace 21b (step S5). Since the precious metal scrap 2a is not burned in the rotary furnace 11 of the rotary kiln 10 but burned as combustible pyrolysis gas in the secondary combustion furnace 21b, the progress of deterioration due to overheating of the rotary furnace 11 is prevented, Suppression of the production of dioxins and their precursors is achieved. The exhaust gas after burning the pyrolysis gas is sent to the cooling tower 40 communicated with the secondary combustion furnace 21b through the flue 31, and the cooling water is sprayed from the plurality of nozzles 41 so that the temperature is 80 ° C. or less. (Step S6). In this way, the generation of dioxins is suppressed by passing through a temperature zone around 300 ° C., which is said to be most likely to generate de novo synthesis, which is one of the causes of dioxin generation.

  Then, the exhaust gas cooled to 80 ° C. or lower is subjected to alkali cleaning by the cleaning tower 45 and is transported to the mist cot rel 50. After the dust and mist are removed, the exhaust gas is exhausted in a completely harmless state (step S7). ).

  As described above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the specific embodiments described in detail, and is within the scope of the gist of the present invention described in the claims. Needless to say, various modifications and changes are possible.

DESCRIPTION OF SYMBOLS 1 Recovery processing apparatus of valuable metal 2a Precious metal scrap 2b Gasification volume reduction 2c Incineration ash 3 Hopper 4 Bread conveyor 5 Bucket conveyor 10 Rotary kiln 11 Rotary furnace 12 Input port 13 Outlet port 14 Burner 15 Coolant spray nozzle 15a Thermometer 16 Seal Member 17 Thermometer 18 Watering nozzle 20 Control device 21a Stoker furnace 21b Secondary combustion furnace 22 Grate (stoker)
24 Burner 25 Hydraulic cylinder 30 Water-sealed conveyor 31 Housing 31a Water-sealed portion 32 Scraper 34 Chain 37 Water supply nozzle 38 Drain nozzle 39 Transfer conveyor 40 Cooling tower 41 Nozzle 45 Washing tower 50 Mist cotrel

Claims (7)

A first processing furnace that thermally decomposes and gasifies precious metal scrap containing valuable metals such as copper, gold, platinum, and the like, and is connected to an outlet of the first processing furnace; A second treatment furnace for further combustion treatment of a gasification-reduced material that is a residue after gasifying the metal scrap; a combustible pyrolysis gas generated in the first treatment furnace; and the second treatment furnace In the recovery processing device for valuable metals, comprising a third processing furnace that completely burns the combustion exhaust gas generated in
Temperature measuring means for measuring the temperature in the second processing furnace;
Sprinkling means that is provided in the second processing furnace and cools the inside of the second processing furnace by spraying cooling water toward the discharge port of the first processing furnace,
Control means for operating the watering means when the temperature measured by the thermometer is equal to or higher than a predetermined temperature to maintain the furnace temperature in a predetermined range;
A valuable metal recovery treatment apparatus comprising: In the valuable metal recovery processing apparatus according to claim 1,
The valuable metal recovery processing apparatus, wherein the temperature measuring means is arranged in the second processing furnace in the vicinity of the discharge port of the first processing furnace. In the valuable metal recovery processing apparatus according to claim 1 or 2,
The valuable metal recovery processing apparatus, wherein the first processing furnace is a kiln, and the watering means sprays cooling water toward the center of the kiln. In the valuable metal collection | recovery processing apparatus of any one of Claim 1 to 3,
An apparatus for recovering valuable metals, comprising a water-sealed conveyer that continuously conveys and recovers the treated ash burned by the second processing furnace in a water tank. Gasification and volume reduction, which is the residue after the precious metal scrap recovered from electronic parts containing valuable metals such as copper, gold and platinum is pyrolyzed and gasified by heating in the first processing furnace Combustion treatment of the product in a second treatment furnace connected to the discharge port of the first treatment furnace, the treated ash after the combustion treatment is recovered as valuable metal-containing soot, and gasified combustible heat In the method for recovering valuable metals by completely burning the cracked gas in the third processing furnace,
The temperature in the second processing furnace is measured by the temperature measuring means, and when the temperature in the furnace measured by the temperature measuring means is equal to or higher than a predetermined temperature, the water is sprayed into the second processing furnace. A method for recovering valuable metals, characterized in that cooling water is sprayed and held in a predetermined range. In the method for recovering valuable metals according to claim 5,
The temperature measurement by the temperature measuring means measures the temperature in the second processing furnace in the vicinity of the discharge port of the first processing furnace, and when the temperature becomes 980 ° C. or higher. A method for recovering valuable metals, wherein at least the temperature in the furnace does not exceed 1000 ° C. by spraying cooling water toward the discharge port of the first processing furnace by the watering means. In the method for recovering valuable metals according to claim 5 or 6,
A method for recovering valuable metals, wherein the treated ash burned in the second processing furnace is continuously conveyed and recovered while being cooled in a water tank of a water-sealed conveyor.

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