JP2016169426A - Apparatus and method for recovering metal smelting raw material from waste incineration ash and apparatus and method for recovering metal from waste incineration ash - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal smelting raw material recovery apparatus and method which can efficiently recover metal smelting raw materials of precious metals and valuable metals from incineration ash obtained by incinerating waste.SOLUTION: An apparatus for recovering metal smelting raw materials from waste incineration ash includes: a falling ash collecting device IIA that collects falling ash falling from a stoker 14 of a stoker-type waste incinerator I; a waste gasification melting device IV; a falling ash feeder III that supplies the falling ash to the waste gasification melting device IV; and a device V for recovering metals derived from the falling ash that cools molten metals discharged from the waste gasification melting device IV to obtain metals derived from the falling ash as metal smelting raw materials. The waste gasification melting device IV pyrolyzes, gasifies, and burns waste to melt ash and receives the supply of the falling ash from the falling ash feeder to melt the falling ash, and discharges molten slag and molten metals produced by melting of the ash of the waste and the falling ash.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a metal smelting raw material recovery apparatus and method from waste incineration ash and a metal recovery apparatus and method from waste incineration ash, and in particular, noble metals such as gold and silver from waste incineration ash, copper, lead , Apparatus and method for recovering metal smelting raw materials of valuable metals such as zinc, and metal recovery apparatus and method for recovering these precious metals and valuable metals, incineration of waste using a grate-type incinerator The present invention relates to a metal smelting raw material recovery technology and metal recovery technology from ash.

  The waste contains precious metals such as gold and silver, and valuable metals such as copper, lead and zinc.

  However, it is very difficult to recover precious metals and valuable metals from the incinerated ash once incinerated. The precious metals and valuable metals contained in the incineration ash are in a very small amount, and the processing cost is high to recover from a large amount of the incineration ash, which prevents the realization of the recovery process. Therefore, the present situation is that waste incineration ash is dumped even though it contains valuable resources.

  The present inventors pay attention to dust ash, which is ash that has fallen under the grate from the gap between the grate and the jet of combustion air during waste incineration using a grate-type incinerator. The properties of dust fall ash were analyzed.

<Dust falling ash analysis results>
Table 1 shows the results of fine analysis of the dust ash obtained by incinerating municipal waste in a grate-type incinerator. Table 1 is an example of the analysis result of the metal component content, and shows the content in 1 ton of dust fall ash.

  As is apparent from the analysis results shown in Table 1, the dust fall ash contains high concentrations of precious metals and valuable metals. Compared with the main ash discharged from the end of the grate, the content of copper and lead contained in the dust ash was very high, and the content of precious metals was found to be equivalent to ore. In the process in which the waste is incinerated while being transported on the grate, the metals contained in the waste are melted, and the droplets fall with the ash from the grate gap or the like and are contained in the dust ash.

  In this way, the amount of dust ash falling from the grate gap is very small compared to the main ash discharged from the end of the grate, but the dust ash contains gold, silver precious metals and It was found that valuable metals such as copper and lead were contained at a relatively high content. On the other hand, the main ash discharged from the end of the grate and occupying most of the incinerated ash has been found to have a remarkably low content of precious metals and valuable metals, which can be difficult to recover. all right.

  In the waste incineration process using a grate-type incinerator, the main ash and dust ash are not separated for a long time, but once collected in the same device such as an ash extrusion device or a water seal conveyor, It was transported to the ash pit and from there to a landfill site by trucks. In other words, the main ash and dust ash were mixed together and processed. In addition, the metal contained in the incinerated ash was also collected, but in that case, in the process of transporting to the ash pit, for example, recovery of iron by a magnetic sorter, recovery of aluminum by an aluminum sorter Etc. are only performed.

  Therefore, the present inventors have proposed a method for recovering noble metals and valuable metals from dust ash having a high content of noble metals and valuable metals as disclosed in Patent Document 1. That is, when incinerating waste in a waste incinerator equipped with a grate, dust ash falling from the grate gap and main ash discharged from the end of the grate are separated and collected, It was decided to collect valuable metals from the separated and collected dust ash.

JP 2003-286522 A

  According to Patent Document 1, dust fall ash separated and collected from main ash is sent to a metal smelting apparatus as it is, and precious metals and valuable metals are recovered by a known metal smelting process (Patent Document). 1, paragraph [0022]).

  The main component of dust fall ash is inorganic ash, which contains a lot of unburned organic matter and non-combustible matter. Thus, also in the method of Patent Document 1, dust fall ash contains many components other than noble metals and valuable metals, so that noble metals and valuable metals are more efficiently and economically produced from such dust fall ash. The technology to collect is required.

  In view of the present situation, the present invention is a metal smelting raw material recovery apparatus and method that can efficiently and economically recover precious metals and valuable metals contained in dust falling ash generated when incinerating waste. An object of the present invention is to provide a metal recovery apparatus and method.

  In the present invention, when the waste is incinerated by the grate-type waste incinerator, the ash falling from the grate gap and the combustion air jet of the grate is called dust fall ash. Metals obtained by cooling the molten metal produced by melting the dust ash with waste ash with a waste gasification melting device, or the dust ash produced by melting with other ash by the ash melting device Metals obtained by cooling molten metals are called dust ash-derived metals. In addition, when incinerating waste in a grate-type waste incinerator, molten metal generated by melting main ash discharged from the end of the grate together with waste ash by a waste gasification melting device Metals obtained by cooling, or metals obtained by cooling the molten ash produced by melting the main ash together with other ash using an ash melting apparatus are referred to as main ash-derived metals.

  In the present invention, noble metals refer to gold, silver, platinum, palladium, rhodium, iridium, ruthenium, and osmium, and valuable metals refer to copper, zinc, lead, and aluminum.

  In the present invention, the above-mentioned problems are related to the metal smelting raw material recovery apparatus according to the following first to sixth inventions, the metal recovery apparatus according to the seventh invention, and the metal smelting raw material recovery method according to the eighth to tenth inventions. According to the third invention, the metal recovery method is solved by the fourteenth invention.

[Metal smelting raw material recovery equipment]
<First invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A waste gasification and melting device for gasifying and melting waste;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the waste gasification and melting device;
A dust ash-derived metal recovery device that cools the molten metal discharged from the waste gasification and melting device and obtains the dust ash-derived metal as a metal smelting raw material,
The waste gasification and melting device receives the supply of waste, pyrolyzes, gasifies and burns the waste, melts the ash, and receives the supply of dust ash from the dust ash supply device to melt the dust ash. An apparatus for recovering metal smelting raw material from waste incinerated ash, which discharges molten slag and molten metals generated by melting ash and dust ash of waste.

<Second invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
An ash melting device for melting ash;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the ash melting device;
A dust-falling ash-derived metal recovery device that cools the molten metal discharged from the ash melting device to obtain the dust-falling ash-derived metal as a metal smelting raw material,
The ash melting device is supplied with dust ash and other ash from the dust ash supply device, melts them, and discharges molten slag and molten metals. Smelting raw material recovery equipment.

  In this 1st invention and 2nd invention, it is preferable to have a dust fall ash carrying means for carrying dust fall ash from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or ash melting apparatus. .

<Third invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A main ash collector that collects main ash discharged from the end of the grate,
A waste gasification and melting device for gasifying and melting waste;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the waste gasification and melting device;
A main ash supply device that receives the main ash from the main ash collector and supplies it to the waste gasification and melting device;
There is a dust ash-derived metal recovery device that cools the molten metal discharged when only the dust ash is supplied as ash to the waste gasification melting device to obtain the metal from the dust ash as a metal smelting raw material. And
The waste gasification and melting device receives the supply of waste, pyrolyzes, gasifies and burns the waste, melts the ash, melts the fallen ash as ash, receives the fallen ash from the fallen ash supply device, Dust ash supply operation that discharges molten slag and molten metals generated by melting the ash and dust ash of waste, and the main ash from the main ash supply device as ash is melted and discarded Metal from waste incineration ash, which can be switched between molten slag generated by melting ash and main ash and main ash supply operation for discharging molten metals Smelting raw material recovery equipment.

<Fourth Invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A main ash collector that collects main ash discharged from the end of the grate,
An ash melting device for melting ash;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the ash melting device;
A main ash supply device that receives the main ash from the main ash collector and supplies it to the ash melting device;
Collecting dust ash-derived metals to cool the molten metal discharged when supplying the ash melting unit and other ash not containing main ash to obtain the metal from the dust ash as a metal smelting raw material Having a device,
The ash melting device receives dust ash from the dust ash supply device and receives other ash that does not contain main ash, melts the dust ash and other ash, and melts the dust ash and other ash. Dash ash supply operation that discharges slag and molten metals, and receives main ash from the main ash supply device and other ash not containing dust ash, melts the main ash and other ash, Smelting slag produced by melting ash and main ash supply operation for discharging molten metals can be switched to perform metal smelting raw material recovery equipment from waste incineration ash .

  In the third invention and the fourth invention, the dust ash conveying means and the main ash are conveyed to convey the dust ash from the place equipped with the grate-type waste incinerator to the place equipped with the waste gasification melting apparatus or the ash melting apparatus. It is preferable to have a main ash conveying means.

<Fifth invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A gasification and melting device that receives the supply of dust ash from the dust ash collection device, pyrolyzes, gasifies and burns the unburned ash in the dust ash, melts the ash, and discharges molten slag and molten metal;
Metal from waste incineration ash, characterized by having a dust ash-derived metal recovery device that cools molten metal discharged from a gasification melting device and obtains metal from the dust ash as a metal smelting raw material Smelting raw material recovery equipment.

<Sixth Invention>
In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
An ash melting device that receives the supply of dust ash from the dust ash collection device, melts the dust ash, and discharges molten slag and molten metal;
It is made of metal from waste incinerated ash, characterized in that it has a dust ash-derived metal recovery device that cools molten metal discharged from the ash melting device to obtain metal ash-derived metal as a raw material for metal smelting Smelting raw material recovery equipment.

  In the fifth and sixth inventions, it is preferable to have a dust ash transporting means for transporting the dust ash from a place equipped with a grate-type waste incinerator to a place equipped with a gasification melting device or an ash melting device.

[Metal recovery equipment]
<Seventh invention>
Metal smelting raw material recovery device from waste incineration ash of one of the first invention to the sixth invention,
And a metal smelting device for smelting at least one of precious metals and valuable metals in response to metals derived from dust ash as a metal smelting raw material recovered by the metal smelting raw material recovery device. Metal recovery equipment from waste incineration ash.

[Metal smelting raw material recovery method]
<Eighth invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply the collected dust ash to a waste gasification and melting device,
The waste gasification and melting device receives the waste supply, pyrolyzes, gasifies and burns the waste, melts the ash, melts the fallen ash with the supplied dust ash, Discharging molten slag and molten metals produced by melting dustfall ash,
A method for recovering a metal smelting raw material from waste incinerated ash, wherein the molten metal discharged from a waste gasification and melting device is cooled to obtain a metal from the dust ash as a metal smelting raw material.

<Ninth Invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply the collected dust ash to the ash melting device,
In the ash melting device, the dust ash and other ash are supplied and melted, and the molten slag and molten metal generated by melting the dust ash and other ash are discharged,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from an ash melting device is cooled to obtain dust ash-derived metals as a metal smelting raw material.

  In the eighth and ninth inventions, it is preferable to transport the dust ash from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or ash melting apparatus.

<Tenth invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Collect the main ash discharged from the end of the grate,
Supply dust ash to waste gasification and melting equipment,
Supply main ash to waste gasification and melting equipment,
Waste gasification and melting equipment receives waste supply, pyrolyzes, gasifies and burns waste, melts ash, and receives dust fall ash to melt dust fall ash. Dust ash supply operation that discharges molten slag and molten metals generated by melting dust ash, and the waste supply, pyrolyzes, gasifies and burns waste, melts ash, The main ash is supplied to melt the main ash, and the main ash supply operation for discharging the molten slag and molten metal generated by melting the ash content of the waste and the main ash is performed,
Featuring dust ash-derived metal as a metal smelting raw material by cooling the molten metal discharged when only dust ash is supplied as ash to the waste gasification and melting device by performing the dust ash supply operation Metal smelting raw material recovery method from waste incineration ash.

<Eleventh invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Collect the main ash discharged from the end of the grate,
Supply dust ash to ash melting equipment,
Supply the main ash to the ash melting device,
In the ash melting device, other ash not containing main ash is received and molten slag and molten metals are generated by melting the dust ash and other ash and melting the dust ash and other ash. The dust ash supply operation that discharges the main ash and the other ash that receives the main ash and does not contain the dust ash, melts the main ash and other ash, and melts the main ash and other ash Switch between main ash supply operation to discharge slag and molten metal,
Performing the falling ash supply operation to cool the molten metal discharged when supplying the ash melting device with other ash not containing the dust ash and main ash to obtain the metal from the dust ash as the raw material for metal smelting Metal smelting raw material recovery method from waste incineration ash characterized by

  In the tenth invention and the eleventh invention, it is preferable to transport the dust ash and main ash from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or ash melting apparatus.

<Twelfth invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply dust ash to gasification and melting equipment,
The gasification and melting device is supplied with dust ash, pyrolyzes, gasifies and burns the unburned matter in the dust ash, melts the ash, discharges molten slag and molten metals,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from a gasification melting apparatus is cooled to obtain dust ash-derived metal as a metal smelting raw material.

<Thirteenth invention>
In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply dust ash to ash melting equipment,
In the ash melting device, the dust ash is supplied and melted, discharging molten slag and molten metals,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from an ash melting device is cooled to obtain dust ash-derived metals as a metal smelting raw material.

  In the twelfth and thirteenth inventions, it is preferable to transport the dust fall ash from a place equipped with a grate-type waste incinerator to a place equipped with a gasification melting apparatus or an ash melting apparatus.

[Metal recovery method]
<14th invention>
In addition to the metal smelting raw material recovery method from the waste incineration ash according to one of the eighth to thirteenth inventions, noble metals and valuable metals received from the dust ash-derived metals as the recovered metal smelting raw material A method for recovering metal from waste incineration ash, characterized by smelting at least one of them.

As described above, the present invention collects dust ash from the grate of a waste incinerator that contains more precious metals and valuable metals than main ash, and gasifies and melts the dust ash into waste gas. In the waste gasification melting furnace of the equipment, the waste is melted together with the ash generated by pyrolysis, the molten slag and molten metal discharged from the waste gasification melting furnace are cooled, and the slag is separated to drop the dust. Since the ash-derived metal is obtained and the dust ash-derived metal is recovered as a metal smelting raw material, the following effects are produced.
(1) Unburned organic matter in the dust ash is burned in the waste gasification melting furnace, and the ash and incombustibles (ceramic pieces, glass pieces, etc.) melt and move to slag. The dust ash-derived metal obtained by cooling the molten metal is high in the content of precious metals and valuable metals, and the quality thereof is increased, so that it has high value as a metal smelting raw material, and the selling price becomes high.
(2) Since zinc and lead contained in dust ash are volatilized and discharged to the outside of the waste gasification and melting furnace along with exhaust gas, the dust ash-derived metals become repellents during copper smelting The content of zinc and lead is lowered, and the value as a copper smelting raw material is increased.
(3) Zinc and lead volatilized from the dust fall ash will solidify from the gaseous state, adhere to the dust and move to the molten fly ash, and will be collected by the dust collector provided downstream of the waste gasification melting furnace. The content of zinc and lead in the molten fly ash becomes high, and the value becomes high when the molten fly ash is reduced to the base as a raw material for smelting zinc and lead.
(4) Recycling dust ash as a raw material for smelting precious metals and valuable metals by using dust ash-derived metals obtained by melting and cooling together with ash generated by pyrolyzing waste. As a result, compared to recycling dust ash as it is, precious metals and valuable metals are concentrated, increasing the value as a metal smelting raw material and improving profits when sold to recycling companies To do. The recovery of precious metals and valuable metals in waste incineration, in recycling, it is possible to reduce the overall CO ₂ emissions.

  Also, the dust ash is melted together with other ash in the ash melting device, the molten slag and molten metal discharged from the furnace are cooled, the slag is separated to obtain the dust ash-derived metal, and the dust ash-derived metal Since the kind is recovered as a metal smelting raw material, the same effects as described above can be obtained.

  Also, only the dust ash is melted in the gasification melting device or ash melting device, the molten slag and molten metal discharged from the furnace are cooled, the slag is separated to obtain the dust ash-derived metals, and the dust ash When recovering the derived metal as a raw material for metal smelting, the dust ash-derived metal obtained by melting only the dust ash has a very high content of precious metals and valuable metals, and the above effects are achieved. You can play higher.

It is a whole structure outline figure of the device of the present invention. It is a block diagram which shows the connection relationship with another apparatus using the waste incinerator and waste gasification melting furnace which concern on one Embodiment of this invention. It is a perspective view which shows the structure of the grate of a waste incinerator.

  Based on FIG. 1, the outline structure is demonstrated about the metal smelting raw material collection | recovery apparatus and the metal collection | recovery apparatus from the waste incineration ash of one Embodiment of this invention. In this embodiment, dust ash collected from a plurality of grate-type waste incinerators can be collectively processed and supplied to a metal smelting apparatus.

  In FIG. 1, a dust fall ash collection device IIA is connected to each of the three grate-type waste incinerators I shown in the figure, and the dust fall ash is collected from each dust fall ash collection device IIA to obtain one dust fall ash. The waste gasification melting furnace (or ash melting furnace of the waste gasification melting apparatus IV) is sent to the waste gasification melting furnace IV (or the ash melting furnace IV of the ash melting apparatus IV) by the supply device III. The ash melting furnace of the melting device IV) melts the dust ash and discharges the molten metal, and cools the molten metal with the dust ash-derived metal recovery device V to obtain the dust ash-derived metal as a metal smelting raw material. After that, each apparatus is connected so that the obtained dust fall ash-derived metals are smelted by the metal smelting apparatus VI to obtain precious metals and valuable metals. Metal smelting raw material recovery equipment from waste incineration ash is grate type waste incinerator I, dust ash collection equipment IIA, dust ash supply equipment III, waste gasification melting equipment IV waste gasification melting furnace (Or ash melting furnace of ash melting device IV) and metal recovery device V from dust fall ash, and the metal recovery device from waste incinerated ash has a metal smelting device VI added to the metal smelting raw material recovery device Configured.

  Hereinafter, each component apparatus in FIG. 1 will be described with reference to FIG. The metal smelting raw material recovery device from the waste incineration ash of this embodiment shown in FIG. 2 includes a grate-type waste incinerator I, and a dust ash collection device IIA and a main ash collection device IIB connected thereto. Ash collection device II, ash supply device III, waste gasification and melting device IV and dust ash-derived metal recovery device V. Metal recovery device from waste incinerated ash is metal smelting raw material recovery The equipment further has a metal smelting equipment VI, and each equipment is as follows.

The dust ash A1 collected from the grate-type waste incinerator is sent to the waste gasification and melting furnace of the waste gasification and melting device IV, where it is supplied with the waste and melted together with the waste ash. After the molten metal and molten slag are discharged and cooled, the metals and slag are separated and separated, and the dust ash-derived metals are recovered as a metal smelting raw material, and further supplied to the metal smelting equipment VI. Precious metals and valuable metals are recovered from the dust fall ash A1.
<Grate-type waste incinerator>
The grate-type waste incinerator I is a furnace in which the waste supplied on the grate is incinerated while being transferred on the grate. That is, the waste W input from the input hopper 11 is continuously supplied onto the grate 14 of the incinerator main body 13 by the dust supply device 12 and is combusted and incinerated while being transferred on the grate 14. The

  First, in the drying area on the grate 14, the waste W inputted from the charging hopper 11 rises while being dried by the combustion air (indicated by arrows in the figure) blown from below the grate 14 and the radiant heat in the furnace. It is heated and ignited, then transferred to the combustion zone for combustion, and further transferred to the post-combustion zone for ashing. Most of the incinerated ash (main ash) of the waste W thus combusted and incinerated is discharged from the ash discharge portion 15 at the end of the downstream side of the grate 14, and this main ash A2 is discharged as ash. It is discharged from the section 15 and collected by a main ash collector IIB described later.

  As shown in FIG. 3, the grate 14 includes a fixed grate 14A and movable grates 14B and 14C arranged on the upstream side (left side in the figure) and the downstream side (right side in the figure). It is configured such that it is inclined with respect to the floor at a predetermined upward angle and is alternately stacked in the furnace length direction. Each of the fixed grate 14A and the movable grate 14B, 14C has a combustion air jet port 17 formed on the front surface (the end surface on the downstream side), and air is jetted from the jet port 17 into the furnace. .

  The fixed grate 14A is fixed to the hearth by a fixed girder 16A, and the front and rear movable grates 14B and 14C are coupled to the mountain-shaped movable girder 16B and 16C and supported slidably on the hearth. The movable girders 16B and 16C are driven by a hydraulic cylinder (not shown) to reciprocate the movable grate 14B and 14C in the tilt direction. By reciprocating the movable grate 14B, 14C in the tilt direction, the waste W and the incinerated ash are transferred downstream while being inverted and stirred.

<Dust falling ash collection device>
A hopper 21 is provided directly below the grate 14, and this hopper 21 also serves as a wind box for blowing combustion air (indicated by an arrow in the figure) from below the grate 14. In the direction). The dust falling ash collection device IIA has this hopper 21, and the dust falling ash A 1 that falls from the gap of the grate 14 and the combustion air outlet 17 (see FIG. 3) as indicated by the white arrow in FIG. It is collected and stored by the hopper 21. In the illustrated example, four hoppers 21 are provided, and each hopper 21 is provided with a damper 22 at a lower portion thereof. Furthermore, a transport conveyor 24 for transporting the dust ash A <b> 1 to the dust ash storage tank 23 is provided below the hoppers 21. The conveyor 24 can be a scraper conveyor or a screw conveyor.

  In the process where the waste W is incinerated while being transported on the grate 14, the dust ash A 1 falls from the gaps in the grate 14 and the combustion air outlet 17. In the process of incineration of the waste W, the metals contained in the waste W are melted, and the droplets are dripped into the lower layer of the incineration ash, and the combustion air jet 17 of the grate 14 and the fire It falls with the ash from the lattice gap, and the dust falls ash A1 contains metals. The fallen dust ash A1 is stored in the hopper 21 immediately below the grate 14. The dust ash A1 dropped and stored in the hopper 21 of the dust ash collection device IIA is dropped onto the transport conveyor 24 when the damper 22 is opened, and is transported and stored in the dust ash storage tank 23 by the transport conveyor 24. . If there is a difference in the content of precious metals and valuable metals contained in the dust ash for each grate area, separate the dust ash from the high content area from the dust ash in other areas. May be collected. That is, for example, the dust ash from the grate in the dry region and the combustion region may be separately collected from the dust ash from the grate in the post-combustion region.

  The porosity of the grate 14 is a ratio of the total opening area of the combustion air injection port of the grate to the total area of the grate hearth, and is preferably 2% or more and 7% or less, and the porosity is as described above. By setting, valuable metals and the like can be recovered economically. If the porosity is less than 2%, the amount of dust ash generated is significantly reduced, and the content of valuable metals is also reduced, so that most of the valuable metals are contained in the main ash, and the porosity is also low. This is because if the amount is more than 7%, the amount of dust ash generated increases, and the content of valuable metals decreases, so the effect of recovering the metal from the dust ash is reduced.

<Main ash collector>
The main ash collector IIB is located below the ash discharge part 15 of the waste incinerator I, receives the fall of the main ash A2, and cools the main ash A2 by, for example, a water seal type. 25, and a main ash storage tank 26 that receives and stores the main ash from the main ash cooling processing device 25. The main ash A2 discharged from the ash discharge unit 15 of the waste incinerator I is put into a water-sealed main ash cooling treatment device 25, whereupon the main ash A2 is appropriately cooled, and then ash such as a pusher is used. The main ash A2 is discharged from the main ash cooling treatment device 25 by a take-out device (not shown), conveyed to the main ash storage tank 26, and stored. Thus, the dust ash A1 is stored in the dust ash storage tank 23, and the main ash A2 is stored in the main ash storage tank 26.

<Dust falling ash conveying means, main ash conveying means>
In this embodiment, the dust ash storage tank 23 is provided with a dust ash transport means 71 and the main ash storage tank 26 is connected with a main ash transport means 72, and the dust ash A1 and the main ash A2 are respectively described below. The waste gasification and melting device IV is used. The dust ash conveying means 71 and the main ash conveying means 72 are configured such that when both the waste incinerator I and the waste gasification and melting apparatus IV are provided close to each other on the same site, It may be tied, and when it is remote, a transportation means such as a truck may be used. Further, the dust ash conveying means 71 and the main ash conveying means 72 are not essential in the present invention, and the dust ash A1 and the main ash A2 are supplied to the waste gasification and melting apparatus IV directly or by another means, respectively. It may be like this.

  The dust ash A1 accommodated in the dust ash storage tank 23 is sent to a waste gasification and melting furnace of a waste gasification and melting apparatus IV described later, where it is supplied together with the waste and melted together with the waste ash, After the molten metals and molten slag are discharged and cooled, the metals and slag are separated and separated, and the dust ash-derived metals are supplied to the metal smelting apparatus VI described later as a metal smelting raw material, and the dust ash A1 Noble metals and valuable metals are recovered from

<Waste gasification and melting equipment>
The waste gasification and melting apparatus IV used in the embodiment of the present invention supplies waste, dust ash and main ash as treatment objects, pyrolyzes, gasifies and burns the waste, and waste ash and dust fall. A shaft furnace type waste gasification melting furnace 40 for melting ash or ash content of waste and main ash, and peripheral devices thereof are provided.

  In the waste gasification and melting furnace, the waste is supplied and thermally decomposed, gasified and burned to melt the ash, and the collected dust ash is supplied to melt and drop the dust ash. Dust ash supply operation that discharges molten slag and molten metal generated by melting ash and dust ash of the waste, and pyrolysis, gasification, combustion of the waste upon supply of waste, A main ash supply operation that melts and receives the collected main ash, melts the main ash, and discharges molten slag and molten metals generated by melting the ash and main ash of the waste Switch between and. A schematic configuration of the shaft furnace type waste gasification melting furnace 40 used in the waste gasification melting apparatus IV and its peripheral devices will be described.

  In the shaft furnace type waste gasification and melting furnace 40 used in an embodiment of the present invention, the waste gasification and melting furnace 40 has a waste, dust ash or main ash, and fuel as a processing object. 40A for introducing limestone as a component adjusting material for the coke and slag to be generated into the furnace, and a gas exhaust for discharging the gas in the furnace to the outside of the furnace. An outlet 40B is provided. Further, an outlet 40C for discharging molten slag and molten metals is provided at the bottom of the waste gasification melting furnace 40.

  Above the waste gasification and melting furnace 40, a waste supply device 41A, a coke supply device 41B, a limestone supply device 41C for supplying waste such as municipal waste, coke and limestone are switched between dust fall ash and main ash. The ash supply device 41D to be supplied is disposed, and coke, limestone, dust ash or main ash ash supplied from each of the supply devices 41B to 41D is transported by a transport conveyor (not shown), and is disposed of as waste. The waste from the supply device 41A is put into the furnace from the charging port 40A at the top of the furnace.

  The ash supply device 41D has a dust ash hopper and a main ash hopper (both not shown), collected from the grate-type waste incinerator I by the dust ash collection device IIA and transported by the dust ash transport means 71. The dust ash thus collected and the main ash collected by the main ash collector IIB and conveyed by the main ash conveying means 72 are supplied to the dust ash hopper and the main ash hopper, respectively. Below the dust ash hopper and the main ash hopper, a valve or a damper is provided, and the dust ash and the main ash are switched by opening and closing and supplied to the conveyor and supplied to the waste gasification and melting furnace.

    A secondary combustion chamber 42 is connected to the gas discharge port 40B, and combustible gas generated by pyrolyzing waste is burned. The secondary combustion chamber 42 is provided with an air blowing port 42A for blowing air for secondary combustion. The secondary combustion chamber 42 is provided adjacent to a boiler 42C that recovers heat from the combustion gas obtained by burning the combustible gas in the secondary combustion chamber 42.

  To the boiler 42C, a temperature reducing tower 43A for cooling exhaust gas discharged from the boiler 42C after heat recovery and a dust collector 43B for removing fly ash in the exhaust gas are connected in order, and the exhaust gas from the temperature reducing tower 43A to the dust collector 43B is connected. A harmful substance removing device 43C for removing harmful substances from the exhaust gas and detoxifying the exhaust gas is connected to the conduit for guiding the exhaust gas. In the temperature reducing tower 43A, the cooling water is sprayed on the exhaust gas so that the exhaust gas is treated at the appropriate temperature by the harmful substance removing device 43C. The harmful substance removing device 43C sprays activated carbon adsorbent that adsorbs harmful substances such as powder alkali agent and dioxins for neutralizing acidic gas in the exhaust gas into the conduit. The dust collector 43B can be applied to various types of dust collection. For example, a bag filter or the like is used, and fly ash, powdered alkaline agent reaction product, activated carbon adsorbent in the exhaust gas is collected and rendered harmless. Exhaust gas is discharged. In the dust collector 43B, exhaust gas from which fly ash and the like are removed and made harmless by the dust collector 43B is connected to the chimney 62 via the blower 61 and is released to the atmosphere.

  The dust collector 43B is supplied with a fly ash treatment device 44A that receives fly ash removed from the exhaust gas and detoxifies the fly ash by a heavy metal elution suppression process and the like, and detoxified fly ash. The fly ash storage tank 44B to store is connected in order. The fly ash stored in the fly ash storage device 44B is supplied to the metal smelting device 52 as a source reduction to recover valuable metals such as zinc and lead.

  On the other hand, in the shaft furnace type waste gasification melting furnace 40, the internal space in the furnace is divided into four regions in the vertical direction, and from below, the coke packed bed A, the moving bed B, the gasification bed C, A free board portion D is formed.

  In the waste gasification melting furnace 40, the coke packed bed A is provided with a main tuyere 40D and the gasification layer C is provided with a sub tuyere 40E, respectively, and oxygen-containing gas is blown into the furnace. Oxygen-enriched air is blown from the main tuyere 40D provided in the coke packed bed A in the lower part of the furnace, and air is blown from the sub tuyere 40E provided in the gasification layer C.

  When coke is introduced into the waste gasification melting furnace 40 having the main tuyere 40D and the sub tuyere 40E, the coke descends to the lower part of the furnace, and the oxygen-enriched air blown from the main tuyere 40D. As a result, the coke is combusted, and the generated high-temperature combustion gas becomes a heat source for thermal decomposition of waste, and further, a heat source for melting ash. In addition, air is blown into the gasification layer C from the sub tuyere 40E, the waste is dried, and then pyrolyzed and partially oxidized to gasify the combustible component.

  In the free board portion D formed in the space above the gasification layer C, a part of the pyrolysis gas (combustible gas) generated by pyrolyzing the waste is partially burned to bring the inside of the furnace to a predetermined temperature. maintain.

<Dust falling ash-derived metal recovery device>
The dust ash-derived metal recovery device V has a granulated water tank, a sorting device, and a dust ash-derived metal storage tank described below. A granulated water tank 45 located below is connected to the tap outlet 40C provided at the lower part of the waste gasification melting furnace 40. The granulated water tank 45 has a conveying section (not shown) that rises obliquely from the bottom of the water tank. A discharge tube hangs from the upper end of the water slag and molten metals that fall from the tap 40C. The slag and metals that have been granulated by cooling with granulated water are transported by the transport unit, and dropped and discharged from the discharge tube.

  A sorting device 46 that separates and sorts metals and slag is disposed below the discharge cylinder of the granulated water tank 45. The sorting device 46 is not limited in its type, but for example, a type using buoyancy and magnetic force can be used.

  Connected to the sorting device 46 are a slag storage tank 47 for storing slag, a dust ash-derived metal storage tank 48 and a main ash-derived metal storage tank 49. As described above, since the metals and slag are sorted in the sorting device 46, the metals are stored in the dust ash-derived metal reservoir 48 or the main ash-derived metals reservoir 49, and the slag is the slag reservoir 47. It is stored in.

  As for the metal generated by cooling the molten metal, the ash supply device 41D provided in the upper part of the waste gasification melting furnace 40 switches between supply of dust ash and supply of main ash as described above. In response to the operation, the sorting device 46 separates and sorts the dust ash-derived metals from the slag during the period during which the dust ash is being supplied. The main ash-derived metal from the sorting device 46 is stored in the main ash-derived metal storage tank 49 during the period in which the main ash is supplied in the tank 48.

<Metal smelting equipment>
The metal smelting device VI has a dust ash-derived metal smelting device 51, and the dust ash-derived metal stored in the dust ash-derived metal storage tank 48 is transferred to the dust ash-derived metal smelting device 51. Supplied to recover precious metals and valuable metals using dust ash-derived metals as smelting raw materials. It is also possible to trade from a company operating the waste gasification and melting apparatus IV to a metal smelting company operating the metal smelting apparatus VI so as to sell dust ash-derived metals as a smelting raw material.

  Further, the fly ash stored in the fly ash storage device 44B is supplied to the metal smelting device 52 as a source reduction to recover valuable metals such as zinc and lead.

<Waste gasification and melting treatment and ash supply method>
In such a waste gasification melting furnace 40, the dust ash from the dust ash storage device 23 connected to the grate-type waste incinerator I, and the main ash from the main ash storage tank 26, respectively, a dust ash transport means 71. Then, the main ash conveying means 72 conveys the ash supply device 41D of the waste gasification melting furnace 40 to the ash supply device 41D, and the ash supply device 41D is switched into the furnace of the waste gasification melting furnace 40.

  In the waste gasification and melting furnace 40, the waste is supplied and thermally decomposed, gasified and burned to melt the ash, and the collected dust ash is supplied and the dust ash is melted. Dust ash supply operation that discharges molten slag and molten metal produced by melting ash and dust ash of waste, and pyrolysis, gasification, combustion, and ash Supply of the main ash that melts the main ash, melts the main ash, and discharges molten slag and molten metal generated by melting the ash and main ash of the waste Switching between driving is performed.

  In the waste gasification and melting furnace, the waste, coke, limestone and dust ash or main ash from each supply device 41 </ b> A to 41 </ b> D pass through a charging port 40 </ b> A provided in the upper part of the gasification and melting furnace 40, respectively. It is put into the furnace. Instead of supplying dust ash by the ash supply device 41D, the dust ash is put into a waste pit for storing waste, and the dust ash is supplied from the waste pit together with the waste to the waste supply device 41A by a crane or the like. The dust fall ash may be thrown into the gasification melting furnace 40 together with the waste. Oxygen-enriched air is blown into the furnace from the main tuyere 40D and air is blown into the furnace from the sub tuyere 40E.

  The coke put into the furnace descends to the lower part of the furnace, and the coke is burned by the oxygen-enriched air blown from the main tuyere 40D to provide a heat source for melting the waste ash and dust ash or main ash. Providing a heat source that raises the generated hot combustion gas and heats it for pyrolysis of waste.

  Waste introduced from the inlet 40A accumulates in the furnace to form a gasification layer C of the waste, and passes through the moving bed B from the coke packed bed A at the lower part of the furnace and rises at high temperature. It is heated by the gas and air blown from the sub tuyere 40E, dried and then pyrolyzed. Combustion gas containing combustible gas generated by pyrolysis rises, a part of the combustible gas is combusted in freeboard part D, maintains the inside of the furnace at a predetermined temperature, and harmful substances and tar generated by pyrolysis It is used so that the process which decomposes | disassembles a part may be given. The gas that has passed through the free board portion D is discharged from the gas discharge port 40B provided in the upper portion of the furnace to the secondary combustion chamber 42 outside the furnace. The gas contains a large amount of combustible gas, is combusted in the secondary combustion chamber 42, recovers heat in the boiler 42C, generates steam, and the steam is used for power generation and the like. Exhaust gas discharged from the boiler 42C is relatively coarse dust is removed by a cyclone (not shown), further cooled by spraying cooling water in the temperature reducing tower 43A, and the harmful substance removing device 43C against the acidic gas. The powdered alkali agent is blown and the acid gas is removed by the neutralization reaction, the activated carbon adsorbent is blown and the dioxins and the like are removed, the fly ash and the like are collected and removed by the dust collector 43B, and are discharged from the chimney 62 to the atmosphere. The The fly ash collected by the dust collector 43B is removed from the filter and discharged, and if necessary, the fly ash treatment device 44A performs elution suppression processing of heavy metals contained in the fly ash and is stored in the fly ash storage tank 44B. The

  Fly ash collected when dust ash supply operation for supplying dust ash as ash has a high zinc content and is useful as a raw material for zinc smelting. Can be sold at a high price because of its high quality. It is preferable to store separately the fly ash collected during the dust ash supply operation and during the main ash supply operation for supplying the main ash as ash. When fly ash recovered during the dust fall ash supply operation is used as a zinc smelting raw material, the fly ash is smelted without the elution suppression treatment of heavy metals contained in the fly ash by the fly ash treatment device 44A. Used as a raw material. The fly ash collected when the main ash supply operation is performed is subjected to elution suppression processing of heavy metals contained in the fly ash by the fly ash treatment device 44A, stored in the fly ash storage tank 44B, and disposed of in landfill.

In the gasification layer C, the waste is pyrolyzed to generate gas, and the fixed carbon and ash generated by the pyrolysis descend with the supplied dust ash or main ash, coke and limestone to form the moving bed B To do. In the moving bed B, the temperature of the solid descending is increased by the high temperature gas rising from the coke packed bed A, and at the same time, the fixed carbon generated by the thermal decomposition of the waste is gasified by the high temperature CO ₂ gas. The In the coke packed bed A, the oxygen-enriched air blown from the main tuyere 40D burns coke and fixed waste carbon remaining without being gasified, and this combustion heat causes waste ash and dust ash or main ash. Are melted to produce molten slag and molten metals. Limestone works as a conditioner that makes the slag melted with ash preferable. Further, the generated high-temperature combustion gas rises and becomes a heat source for heating for thermal decomposition of the waste.

  In the lower part of the furnace below the main tuyere 40D, the coke packed bed A is formed in a state in which coke that is high in temperature but not burnt out is filled while maintaining the gap between the coke lumps, and molten slag and molten metal The kind drops the gap between the coke lumps and reaches the furnace bottom. The molten slag and the molten metal are homogenized and stabilized in properties before reaching the furnace bottom, and are discharged from the tap 40C provided at the furnace bottom.

<Dust falling ash-derived metal recovery method>
The molten slag and molten metals discharged from the outlet 40C of the waste gasification melting furnace 40 are supplied to a granulated water tank 45 provided outside the furnace, cooled and solidified, and the granulated slag and metals are removed. Generated. The slag and metals are mixed and discharged from the granulated water tank 45, separated into slag and metals by a sorting device 46 such as magnetic sorting, and the slag is stored in the slag storage tank 47.

  Corresponding to the operation of supplying dust ash as ash and the operation of supplying main ash separately, the dust ash-derived metals separated from the slag by the sorting device 46 during the dust ash supply operation are derived from the dust ash The metal is stored in the metal reservoir 48, and the main ash-derived metal is stored in the main ash-derived metal reservoir 49 during the main ash supply operation.

  The slag storage tank, the dust ash-derived metal storage tank, and the main ash-derived metal storage tank may not be provided, but may be loaded in a yard that stores them separately. Further, a single metal storage tank may store the dust ash-derived metals during the dust ash supply operation, and may store the main ash-derived metals during the main ash supply operation.

<Metal recovery method>
The dust ash-derived metal is recovered as a metal smelting raw material, and further supplied to the dust ash-derived metal smelting device 51, and precious metals and valuable metals are recovered from the dust ash-derived metal. Dust ash-derived metals have a high content of precious metals and valuable metals, are high in quality as metal smelting raw materials, and can be sold at high prices. In addition, before performing metal smelting using dust ash-derived metals as raw materials, it is possible to carry out sorting such as known magnetic sorting, aluminum sorting, and specific gravity sorting to sort and separate mixed iron and aluminum.

  The main ash-derived metals stored in the main ash-derived metal reservoir 49 have a lower content of precious metals and valuable metals than the dust ash-derived metals, but are reduced and melted in a waste gasification melting furnace. Since it is concentrated compared to the main ash, it can be used as a metal smelting raw material. In addition, by supplying main ash to the waste gasification and melting furnace and making it into slag and metals, the volume can be reduced and the processing cost can be reduced. Can be reduced.

  In the above embodiment, a shaft furnace type waste gasification and melting furnace is used as the waste gasification and melting furnace. In such a shaft furnace type gasification and melting furnace, the ash content is received by supplying dust ash and waste. Therefore, it is preferable that the molten slag and the molten metal are reliably generated and discharged. On the other hand, there is a fluidized-bed gasification furnace as another gasification furnace, but even if dust ash is supplied, it does not melt in the fluidized-bed gasification furnace and is discharged together with exhaust gas as fly ash, or other waste It is unsuitable because it is difficult to recover the metals by discharging them from the lower part of the fluidized bed gasification furnace together with the metal or large mass, and melting the dust ash to produce molten metals.

  In the present invention, an ash melting furnace can be used instead of the waste gasification melting furnace. As the ash melting furnace, the electric resistance type is most preferable in terms of ash melting temperature and melting efficiency, and the plasma type is Following this, the fuel melting type is not suitable because of its low melting temperature.

  In addition, when only the dust ash is supplied to the gasification melting device and melted to recover the metal from the dust ash as a metal smelting raw material, a shaft furnace having a coke bed or plasma is used as a suitable gasification melting device. A shaft furnace is mentioned.

  In the waste gasification and melting apparatus or the ash melting apparatus, the rated processing amount of the gasification melting processing amount or the ash melting processing amount per unit time is set. It is not preferable from the viewpoint of stable operation and energy consumption when the waste gasification melting equipment or ash melting equipment accepts and adds dust ash from incinerators of other facilities and treats it by adding it. Therefore, it is preferable to manage the amount of dust fall ash input so as not to exceed the rated throughput. By appropriately managing the amount of dust ash input, even if additional dust ash is added while melting waste or incinerated ash, ensuring stable operation without exceeding the rated treatment amount, The production amount of metals having a high content of noble metals and valuable metals can be further increased. In preparation for a situation in which the amount of dust ash received from the incinerator of another facility exceeds the input amount, it is preferable to install a yard or the like that primarily stores the dust ash.

  When the waste gasification melting furnace is operated to supply dust ash together with the waste and the furnace is stopped for maintenance or the like, there is a bottom metal in which the molten metal is solidified at the bottom of the furnace. Since this bottom metal is derived from dust ash and has a high content of precious metals and valuable metals, it is preferable to recover and use it as a metal smelting raw material. Similarly, the bottom metal of the ash melting furnace is preferably used as a metal smelting raw material.

I Grate-type waste incinerator
IIA dust fall ash collection device
IIB Main ash collector
III Dust falling ash supply device (ash supply device)
IV Waste gasification and melting equipment (ash melting equipment)
V Dust ash-derived metal recovery equipment
VI Metal smelting equipment 48 Dust ash-derived metal storage equipment 49 Main ash-derived metal storage equipment 71 Dust ash conveyance means 72 Main ash conveyance means

Claims (20)

In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A waste gasification and melting device for gasifying and melting waste;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the waste gasification and melting device;
A dust ash-derived metal recovery device that cools the molten metal discharged from the waste gasification and melting device and obtains the dust ash-derived metal as a metal smelting raw material,
The waste gasification and melting device receives the supply of waste, pyrolyzes, gasifies and burns the waste, melts the ash, and receives the supply of dust ash from the dust ash supply device to melt the dust ash. An apparatus for recovering metal smelting raw material from waste incinerated ash, which discharges molten slag and molten metals generated by melting ash and dust ash of waste. In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
An ash melting device for melting ash;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the ash melting device;
A dust-falling ash-derived metal recovery device that cools the molten metal discharged from the ash melting device to obtain the dust-falling ash-derived metal as a metal smelting raw material,
The ash melting device is supplied with dust ash and other ash from the dust ash supply device, melts them, and discharges molten slag and molten metals. Smelting raw material recovery equipment.   The disposal according to claim 1 or 2, further comprising dust ash transport means for transporting the dust ash from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting device or ash melting device. Metal smelting raw material recovery equipment from incineration ash. In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A main ash collector that collects main ash discharged from the end of the grate,
A waste gasification and melting device for gasifying and melting waste;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the waste gasification and melting device;
A main ash supply device that receives the main ash from the main ash collector and supplies it to the waste gasification and melting device;
There is a dust ash-derived metal recovery device that cools the molten metal discharged when only the dust ash is supplied as ash to the waste gasification melting device to obtain the metal from the dust ash as a metal smelting raw material. And
The waste gasification and melting device receives the supply of waste, pyrolyzes, gasifies and burns the waste, melts the ash, melts the fallen ash as ash, receives the fallen ash from the fallen ash supply device, Dust ash supply operation that discharges molten slag and molten metals generated by melting the ash and dust ash of waste, and the main ash from the main ash supply device as ash is melted and discarded Metal from waste incineration ash, which can be switched between molten slag generated by melting ash and main ash and main ash supply operation for discharging molten metals Smelting raw material recovery equipment. In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A main ash collector that collects main ash discharged from the end of the grate,
An ash melting device for melting ash;
A dust ash supply device that receives the dust ash from the dust ash collector and supplies it to the ash melting device;
A main ash supply device that receives the main ash from the main ash collector and supplies it to the ash melting device;
Collecting dust ash-derived metals to cool the molten metal discharged when supplying the ash melting unit and other ash not containing main ash to obtain the metal from the dust ash as a metal smelting raw material Having a device,
The ash melting device receives dust ash from the dust ash supply device and receives other ash that does not contain main ash, melts the dust ash and other ash, and melts the dust ash and other ash. Dash ash supply operation that discharges slag and molten metals, and receives main ash from the main ash supply device and other ash not containing dust ash, melts the main ash and other ash, Smelting slag produced by melting ash and main ash supply operation for discharging molten metals can be switched to perform metal smelting raw material recovery equipment from waste incineration ash .   It shall have dust ash conveying means for conveying dust ash from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or ash melting apparatus and a main ash conveying means for conveying main ash. The metal smelting raw material collection | recovery apparatus from the waste incineration ash of Claim 4 or Claim 5. In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
A gasification and melting device that receives the supply of dust ash from the dust ash collection device, pyrolyzes, gasifies and burns the unburned ash in the dust ash, melts the ash, and discharges molten slag and molten metal;
Metal from waste incineration ash, characterized by having a dust ash-derived metal recovery device that cools molten metal discharged from a gasification melting device and obtains metal from the dust ash as a metal smelting raw material Smelting raw material recovery equipment. In a metal smelting raw material recovery device that recovers metal smelting raw material from incineration ash discharged from a grate-type waste incinerator,
A dust ash collecting device for collecting dust ash falling from a gap of the grate and a jet of combustion air in the grate;
An ash melting device that receives the supply of dust ash from the dust ash collection device, melts the dust ash, and discharges molten slag and molten metal;
It is made of metal from waste incinerated ash, characterized in that it has a dust ash-derived metal recovery device that cools molten metal discharged from the ash melting device to obtain metal ash-derived metal as a raw material for metal smelting Smelting raw material recovery equipment.   The waste incineration according to claim 7 or 8, further comprising dust ash transport means for transporting the dust ash from a place equipped with a grate-type waste incinerator to a place equipped with a gasification melting apparatus or an ash melting apparatus. Metal smelting raw material recovery equipment from ash. Metal smelting raw material recovery device from waste incineration ash according to one of claims 1 to 9,
And a metal smelting device for smelting at least one of precious metals and valuable metals in response to metals derived from dust ash as a metal smelting raw material recovered by the metal smelting raw material recovery device. Metal recovery equipment from waste incineration ash. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply the collected dust ash to a waste gasification and melting device,
The waste gasification and melting device receives the waste supply, pyrolyzes, gasifies and burns the waste, melts the ash, melts the fallen ash with the supplied dust ash, Discharging molten slag and molten metals produced by melting dustfall ash,
A method for recovering a metal smelting raw material from waste incinerated ash, wherein the molten metal discharged from a waste gasification and melting device is cooled to obtain a metal from the dust ash as a metal smelting raw material. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply the collected dust ash to the ash melting device,
In the ash melting device, the dust ash and other ash are supplied and melted, and the molten slag and molten metal generated by melting the dust ash and other ash are discharged,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from an ash melting device is cooled to obtain dust ash-derived metals as a metal smelting raw material.   The metal from the waste incineration ash according to claim 11 or 12, wherein dust ash is transported from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or an ash melting apparatus. Smelting raw material recovery method. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Collect the main ash discharged from the end of the grate,
Supply dust ash to waste gasification and melting equipment,
Supply main ash to waste gasification and melting equipment,
Waste gasification and melting equipment receives waste supply, pyrolyzes, gasifies and burns waste, melts ash, and receives dust fall ash to melt dust fall ash. Dust ash supply operation that discharges molten slag and molten metals generated by melting dust ash, and the waste supply, pyrolyzes, gasifies and burns waste, melts ash, The main ash is supplied to melt the main ash, and the main ash supply operation for discharging the molten slag and molten metal generated by melting the ash content of the waste and the main ash is performed,
Featuring dust ash-derived metal as a metal smelting raw material by cooling the molten metal discharged when only dust ash is supplied as ash to the waste gasification and melting device by performing the dust ash supply operation Metal smelting raw material recovery method from waste incineration ash. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Collect the main ash discharged from the end of the grate,
Supply dust ash to ash melting equipment,
Supply the main ash to the ash melting device,
In the ash melting device, other ash not containing main ash is received and molten slag and molten metals are generated by melting the dust ash and other ash and melting the dust ash and other ash. The dust ash supply operation that discharges the main ash and the other ash that receives the main ash and does not contain the dust ash, melts the main ash and other ash, and melts the main ash and other ash Switch between main ash supply operation to discharge slag and molten metal,
Performing the falling ash supply operation to cool the molten metal discharged when supplying the ash melting device with other ash not containing the dust ash and main ash to obtain the metal from the dust ash as the raw material for metal smelting Metal smelting raw material recovery method from waste incineration ash characterized by   The waste incineration ash according to claim 14 or 15, wherein dust ash and main ash are transported from a place equipped with a grate-type waste incinerator to a place equipped with a waste gasification melting apparatus or ash melting apparatus. Metal smelting raw material recovery method. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply dust ash to gasification and melting equipment,
The gasification and melting device is supplied with dust ash, pyrolyzes, gasifies and burns the unburned matter in the dust ash, melts the ash, discharges molten slag and molten metals,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from a gasification melting apparatus is cooled to obtain dust ash-derived metal as a metal smelting raw material. In the metal smelting raw material recovery method for recovering the metal smelting raw material from the incinerated ash discharged from the grate-type waste incinerator,
Collecting dust ash falling from the grate gap and the combustion air outlet of the grate,
Supply dust ash to ash melting equipment,
In the ash melting device, the dust ash is supplied and melted, discharging molten slag and molten metals,
A method for recovering a metal smelting raw material from waste incinerated ash, characterized in that molten metal discharged from an ash melting device is cooled to obtain dust ash-derived metals as a metal smelting raw material.   19. Metal smelting from waste incineration ash according to claim 17 or 18, wherein dust ash is transported from a place equipped with a grate-type waste incinerator to a place equipped with a gasification melting apparatus or an ash melting apparatus. Raw material recovery method. In addition to the metal smelting raw material recovery method from the waste incineration ash according to any one of claims 11 to 19,
A method for recovering metal from waste incineration ash, comprising receiving dust-reduced ash-derived metals as recovered metal smelting raw materials and smelting at least one of precious metals and valuable metals.

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