CN113528851A - Method for recovering silver from silver-containing waste film - Google Patents
Method for recovering silver from silver-containing waste film Download PDFInfo
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- CN113528851A CN113528851A CN202110845524.0A CN202110845524A CN113528851A CN 113528851 A CN113528851 A CN 113528851A CN 202110845524 A CN202110845524 A CN 202110845524A CN 113528851 A CN113528851 A CN 113528851A
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- silver
- shell
- containing waste
- film
- recovering
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 155
- 239000004332 silver Substances 0.000 title claims abstract description 155
- 239000002699 waste material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000012634 fragment Substances 0.000 claims abstract description 28
- 238000005406 washing Methods 0.000 claims abstract description 26
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000004064 recycling Methods 0.000 claims abstract 2
- 238000001125 extrusion Methods 0.000 claims description 29
- 238000010828 elution Methods 0.000 claims description 20
- 238000002309 gasification Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000004065 wastewater treatment Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 7
- 238000010298 pulverizing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000013048 microbiological method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6423—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a translational movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for recovering silver from silver-containing waste films, which comprises the following steps: s1, crushing the silver-containing waste film into small fragments with the length of about 20-40 mm and the width of about 20-40 mm by using a crusher; s2, washing silver from the silver-containing waste film fragments by using an alkali solution in a roller device, filtering after the reaction is finished to obtain film fragments and an alkali washing solution, washing the film fragments by using water to obtain clean film fragments and film washing water, mixing the film washing water and the alkali washing solution to obtain a silver-containing solution, and recycling the clean film fragments; the method realizes the maximum recovery of the silver and the film and greatly improves the working efficiency of silver recovery.
Description
Technical Field
The invention relates to the technical field of silver-containing waste films, in particular to a method for recovering silver from silver-containing waste films, and particularly relates to a device for recovering the silver from the silver-containing waste films.
Background
The silver-containing waste film comprises: the waste products of photosensitive film, punched edge, waste film after test piece, electric film scrapped by film issuing company, various waste films in film shooting process of film producing factory, various scrapped negative films of hospital X-ray film, industrial and aerial photograph and used negative films after photograph duplication, etc.
The method for recovering silver from silver-containing waste films comprises the following steps: incineration, chemical treatment, and microbiological methods. At present, the treatment by the incineration method is mainly carried out abroad, and the chemical and microbiological methods are inferior. The incineration method is characterized by simple method and high silver recovery rate, but the efficiency is poor. Therefore, the method for treating and recovering the silver and the film base in the silver-containing waste film, which has the advantages of simple process, low cost, environmental protection and remarkable effect, has important practical significance.
To this end, we propose a method of recovering silver from silver-containing waste films.
Disclosure of Invention
The technical task of the invention is to provide a method for recovering silver from silver-containing waste films, aiming at the defects, the method has the advantages of simple process, low cost and obvious effect, realizes the maximum recovery of the silver and the films, and greatly improves the working efficiency of silver recovery to solve the problems.
The technical scheme of the invention is realized as follows:
the invention provides a method for recovering silver from silver-containing waste films, which comprises the following steps:
s1, crushing the silver-containing waste film into small fragments with the length of about 20-40 mm and the width of about 20-40 mm by using a crusher;
and S2, washing silver from the silver-containing waste film fragments by using an alkali solution in a roller device, and filtering after the reaction is finished to obtain the film fragments and an alkali washing solution. The film pieces are washed with water to provide clean film pieces and film processing water. And mixing the film washing water and the alkaline elution liquid to obtain the silver-containing solution. The clean film fragments are recycled;
and S3, adjusting the pH value of the silver-containing solution by using acid, naturally settling the solution after the pH value of the silver-containing solution reaches a target value, and filtering to obtain silver-containing mud and neutralized solution after natural settling is finished. The neutralized solution returns to the working procedure of silver elution by alkaline solution or is sent to the working procedure of wastewater treatment. Drying the silver-containing mud by using a dryer;
and S4, the water reacts in the steam generator to generate water vapor. The water vapor and the silver-containing mud (after being dried) react in a microwave gasification reaction device to obtain coarse silver particles (blocks) and gasified gas. And washing the gasified gas with water to obtain washing wastewater and washed gas. The washed gas is dried and fully combusted to obtain carbon dioxide and water, and the gas has no peculiar smell or stink. The waste water after the gas washing is sent to a waste water treatment system for treatment;
s5, the coarse silver particles (blocks) collected from the microwave gasification reaction device can be further recovered by a metallurgical method to produce standard silver ingot products.
Preferably, the addition amount of sodium hydroxide in the alkali liquor is 2-10% of the mass of the silver-containing waste film, the reaction temperature of the alkali liquor for eluting silver in the silver-containing film fragments is 70-90 ℃, the reaction time of the alkali liquor for eluting silver in the silver-containing film fragments is 1-4 h, the pH value of the silver-containing solution is adjusted to be 2-5 by the sulfuric acid solution, the microwave gasification temperature is 600-960 ℃, the optimal temperature is 700-800 ℃, the mass ratio of water vapor and silver mud (after drying) of the microwave gasification is 2: 1-5: 1, the optimal value is 3:1, the microwave gasification time is 1-3 h, the optimal value is 2h, and the combustion temperature of gas generated by the microwave gasification is 700-1200 ℃.
The invention also provides a device for recovering silver from the silver-containing waste film, which comprises:
the crushing device comprises a shell, a feeding hopper, a discharge port, two crushing motors, two crushing rollers and an anti-blocking assembly, wherein the feeding hopper is fixedly arranged above the shell, the discharge port is formed in the bottom of the side face of the shell, the two crushing motors are symmetrically arranged on the left side of the shell, the two crushing rollers are symmetrically arranged inside the shell, the two crushing rollers are respectively and fixedly connected with output shafts of the two crushing motors, and the anti-blocking assembly is arranged inside the shell and corresponds to the feeding hopper;
the anti-blocking component comprises a shaking frame, two limiting slide rods, two reset springs, two extrusion rods, extrusion blocks, a mounting seat, a servo motor and a cam, wherein the shaking frame is arranged in the shell and corresponds to the position of the feeding hopper, one ends of the two limiting slide rods are symmetrically connected to one side of the shaking frame, the other ends of the two limiting slide rods movably penetrate through the shell, the two reset springs are respectively sleeved on the surfaces of the two limiting slide rods, one ends of the two extrusion rods are symmetrically connected to the other side of the shaking frame, the other ends of the extrusion rods movably penetrate through the shell, the extrusion blocks are fixedly connected to the other ends of the two extrusion rods, the mounting seat is fixedly mounted on the side surface of the shell and corresponds to the position of the extrusion blocks, and the servo motor is fixedly mounted at the bottom of the mounting seat, the cam is fixedly arranged on an output shaft of the servo motor;
the elution device comprises a support frame, a rotating motor, a rotating drum and two limiting assemblies, wherein the rotating motor is fixedly arranged on the side surface of the support frame, the rotating drum is arranged in the support frame, one end of the rotating drum is fixedly connected with an output shaft of the rotating motor, and the two limiting assemblies are symmetrically arranged at the bottom of the inner wall of the support frame and correspond to the position of the rotating drum;
the limiting assembly comprises a supporting column, an arc-shaped supporting plate and a plurality of supporting balls, the bottom of the supporting column is fixedly connected to the supporting frame, the arc-shaped supporting plate is fixedly connected to the top of the supporting column, and the plurality of supporting balls are arranged on the inner wall of the arc-shaped supporting plate at equal intervals;
the filter device comprises a filter shell, a water inlet, a water outlet, a filter screen, a slag hole and a cleaning assembly, wherein the water inlet is arranged at the top of the filter shell, the water outlet is arranged at the bottom of the side surface of the filter shell, the filter screen is fixedly arranged on the inner wall of the filter shell, the slag hole is arranged on the side surface of the filter shell and corresponds to the position of the filter screen, and the cleaning assembly is arranged on the side surface of the filter shell and corresponds to the position of the filter screen;
the clearance subassembly includes electric putter, push pedal and clearance brush, electric putter fixed mounting be in filter shell's side, just electric putter's output activity runs through filter shell setting, push pedal fixed connection be in on electric putter's the output, clearance brush fixed connection be in the bottom of push pedal, and with contradict each other in the top of filter screen.
Preferably, the bottom of the inner wall of the shell and the position corresponding to the discharge hole are fixedly connected with a material guiding inclined plate matched with the discharge hole.
Preferably, the output shaft of the crushing motor is movably arranged to penetrate through the shell and extend to the inside of the shell.
Preferably, the output shaft of the servo motor is movably arranged to penetrate through the mounting seat and extend to the outside of the mounting seat.
Preferably, the side of the cam close to the extrusion block interferes with the extrusion block.
Preferably, the output shaft of the rotating electrical machine is movably arranged to penetrate through the supporting frame and extend to the outer side of the supporting frame.
Preferably, the other end of the rotary drum is rotatably mounted on the inner wall of the support frame through a ball bearing.
Preferably, one side of the supporting ball close to the rotary roller is arranged to roll on the outer wall of the rotary roller.
Compared with the prior art, the invention has the advantages and positive effects that:
1. according to the silver-containing film crushing device, the arranged anti-blocking assembly is composed of the shaking frame, the two limiting slide rods, the two reset springs, the two extrusion rods, the extrusion blocks, the mounting seat, the servo motor and the cam, so that the blockage generated in the feeding process in the silver-containing film crushing process can be effectively avoided, the crushing efficiency of the silver-containing film is greatly improved, and the practicability is improved;
2. the elution device is composed of a support frame, a rotating motor, a rotating drum and two limiting assemblies, the device adopts a rotary elution mode, the contact surface of a silver-containing film and an eluent is greatly increased, so that the elution efficiency is improved, and the running stability of the elution device is greatly improved by arranging the limiting assemblies, so that the practicability of the elution device is improved;
3. according to the invention, the arranged cleaning assembly is composed of the electric push rod, the push plate and the cleaning brush, so that residues generated by filtering can be conveniently cleaned, great convenience is provided for workers, the labor intensity is reduced, and the working efficiency of the cleaning device is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a process for recovering silver from silver-containing waste film in accordance with an embodiment of the present invention;
FIG. 2 is a process flow diagram for recovering silver from silver-containing waste film in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an apparatus for recovering silver from silver-containing waste film in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a shredding mechanism in an apparatus for recovering silver from silver-containing waste film in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of the internal structure of a shredding device in a device for recovering silver from silver-containing waste film according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an elution apparatus in an apparatus for recovering silver from silver-containing waste film in accordance with an embodiment of the present invention;
fig. 7 is a schematic view showing the internal structure of a rotary drum in an apparatus for recovering silver from silver-containing waste film according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a position limiting assembly in the apparatus for recovering silver from silver-containing waste film according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a filter device in an apparatus for recovering silver from silver-containing waste film according to an embodiment of the present invention;
fig. 10 is a schematic diagram of the internal structure of a filtering device in a device for recovering silver from silver-containing waste film according to an embodiment of the present invention.
In the figure:
1. a crushing device; 101. a housing; 102. a feeding hopper; 103. a discharge port; 104. a grinding motor; 105. a crushing roller; 106. an anti-clogging component; 1061. a shaking frame; 1062. a limiting slide bar; 1063. a return spring; 1064. an extrusion stem; 1065. extruding the block; 1066. a mounting seat; 1067. a servo motor; 1068. a cam.
2. An elution device; 201. a support frame; 202. a rotating electric machine; 203. rotating the drum; 204. a limiting component; 2041. a support pillar; 2042. an arc-shaped support plate; 2043. supporting the balls;
3. a filtration device; 301. a filter shell; 302. a water inlet; 303. a water outlet; 304. a filter screen; 305. a slag outlet; 306. cleaning the assembly; 3061. an electric push rod; 3062. pushing the plate; 3063. a cleaning brush.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
The invention is further described with reference to the following figures and specific examples.
Example 1
As shown in fig. 1-2, the present invention provides a method for recovering silver from silver-containing waste film, comprising the steps of:
s1, crushing the silver-containing waste film into small fragments with the length of about 20-40 mm and the width of about 20-40 mm by using a crusher;
and S2, washing silver from the silver-containing waste film fragments by using an alkali solution in a roller device, and filtering after the reaction is finished to obtain the film fragments and an alkali washing solution. The film pieces are washed with water to provide clean film pieces and film processing water. And mixing the film washing water and the alkaline elution liquid to obtain the silver-containing solution. The clean film fragments are recycled;
and S3, adjusting the pH value of the silver-containing solution by using acid, naturally settling the solution after the pH value of the silver-containing solution reaches a target value, and filtering to obtain silver-containing mud and neutralized solution after natural settling is finished. The neutralized solution returns to the working procedure of silver elution by alkaline solution or is sent to the working procedure of wastewater treatment. Drying the silver-containing mud by using a dryer;
and S4, the water reacts in the steam generator to generate water vapor. The water vapor and the silver-containing mud (after being dried) react in a microwave gasification reaction device to obtain coarse silver particles (blocks) and gasified gas. And washing the gasified gas with water to obtain washing wastewater and washed gas. The washed gas is dried and fully combusted to obtain carbon dioxide and water, and the gas has no peculiar smell or stink. The waste water after the gas washing is sent to a waste water treatment system for treatment;
s5, collecting the coarse silver particles (blocks) from the microwave gasification reaction device, and further recovering and producing standard silver ingot products by a metallurgical method;
the method comprises the following steps of adding sodium hydroxide into alkali liquor, wherein the adding amount of the sodium hydroxide in the alkali liquor is 2-10% of the mass of silver-containing waste films, the reaction temperature of the alkali liquor for eluting silver in the silver-containing film fragments is 70-90 ℃, the reaction time of the alkali liquor for eluting the silver in the silver-containing film fragments is 1-4 hours, the pH value of a silver-containing solution is adjusted to be 2-5 by the sulfuric acid solution, the temperature of microwave gasification is 600-960 ℃, the optimal temperature is 700-800 ℃, the mass ratio of water vapor of the microwave gasification to silver mud (after drying) is 2: 1-5: 1, the optimal value is 3:1, the time of the microwave gasification is 1-3 hours, the optimal value is 2 hours, and the temperature of gas combustion generated by the microwave gasification is 700-1200 ℃.
Example 2
Based on the above process, an apparatus for recovering silver from silver-containing waste film according to an embodiment of the present invention, as shown in fig. 3 to 10, includes:
as shown in fig. 3 to 5, the pulverizing device 1 includes a housing 101, an input hopper 102, a discharge port 103, two pulverizing motors 104, two pulverizing rollers 105, and an anti-blocking assembly 106, wherein the input hopper 102 is fixedly installed above the housing 101, the discharge port 103 is opened at the bottom of the side surface of the housing 101, the two pulverizing motors 104 are symmetrically installed at the left side of the housing 101, the two pulverizing rollers 105 are symmetrically installed inside the housing 101, the two pulverizing rollers 105 are respectively and fixedly connected with output shafts of the two pulverizing motors 104, and the anti-blocking assembly 106 is installed inside the housing 101 and corresponds to the position of the input hopper 102;
as shown in fig. 3 to 5, the anti-blocking assembly 106 includes a shaking frame 1061, two limiting slide rods 1062, two return springs 1063, two extrusion rods 1064, extrusion blocks 1065, a mounting seat 1066, a servo motor 1067, and a cam 1068, wherein the shaking frame 1061 is disposed inside the housing 101 and corresponds to the position of the feeding hopper 102, one end of each of the two limiting slide rods 1062 is symmetrically connected to one side of the shaking frame 1061, the other end of each of the two limiting slide rods 1062 is movably disposed through the housing 101, the two return springs 1063 are respectively sleeved on the surfaces of the two limiting slide rods 1062, one end of each of the two extrusion rods 1064 is symmetrically connected to the other side of the shaking frame 1061, the other end of each of the extrusion rods 1064 is movably disposed through the housing 101, the extrusion block 1065 is fixedly connected to the other end of each of the two extrusion rods 1064, and the mounting seat 1066 is fixedly mounted on the side surface of the housing 101, corresponding to the position of the extrusion block 1065, the servo motor 1067 is fixedly mounted at the bottom of the mounting seat 1066, and the cam 1068 is fixedly mounted on an output shaft of the servo motor 1067;
as shown in fig. 3 to 8, the elution device 2 includes a support frame 201, a rotating motor 202, a rotating drum 203, and two limiting assemblies 204, wherein the rotating motor 202 is fixedly installed on a side surface of the support frame 201, the rotating drum 203 is disposed inside the support frame 201, one end of the rotating drum 203 is fixedly connected with an output shaft of the rotating motor 202, and the two limiting assemblies 204 are symmetrically installed at the bottom of an inner wall of the support frame 201 and correspond to positions of the rotating drum 203;
as shown in fig. 3 to 8, the limiting assembly 204 includes a supporting column 2041, an arc-shaped supporting plate 2042 and a plurality of supporting balls 2043, the bottom of the supporting column 2041 is fixedly connected to the supporting frame 201, the arc-shaped supporting plate 2042 is fixedly connected to the top of the supporting column 2041, and the plurality of supporting balls 2043 are equidistantly disposed on the inner wall of the arc-shaped supporting plate 2042;
wherein, as shown in fig. 3-10, filter equipment 3 is including filtering shell 301, water inlet 302, delivery port 303, filter screen 304, slag notch 305 and clearance subassembly 306, water inlet 302 sets up the top of filtering shell 301, delivery port 303 sets up the bottom of filtering shell 301 side, filter screen 304 fixed mounting be in on the inner wall of filtering shell 301, slag notch 305 sets up the side of filtering shell 301, and correspond the position of filter screen 304, clearance subassembly 306 is installed the side of filtering shell 301, and correspond the position of filter screen 304.
As shown in fig. 3 to 10, the cleaning assembly 306 includes an electric push rod 3061, a push plate 3062 and a cleaning brush 3063, the electric push rod 3061 is fixedly installed on a side surface of the filter shell 301, an output end of the electric push rod 3061 movably penetrates through the filter shell 301, the push plate 3062 is fixedly connected to an output end of the electric push rod 3061, and the cleaning brush 3063 is fixedly connected to a bottom of the push plate 3062 and is abutted against the upper side of the filter screen 304.
By adopting the technical scheme, the silver recovery device for the silver-containing waste film is simple in process, low in cost and remarkable in effect, the silver and the film are recovered to the maximum degree, and the silver recovery working efficiency is greatly improved.
The anti-blocking component 106 is composed of a shaking frame 1061, two limiting slide bars 1062, two return springs 1063, two extrusion rods 1064, an extrusion block 1065, a mounting seat 1066, a servo motor 1067 and a cam 1068, and can effectively avoid blocking during the silver-containing film crushing process during feeding, so that the crushing efficiency of the silver-containing film is greatly improved, and the practicability is improved;
the elution device 2 is composed of a support frame 201, a rotating motor 202, a rotating drum 203 and two limiting assemblies 204, the device adopts a rotary elution mode, the contact surface of a silver-containing film and an eluent is greatly increased, so that the elution efficiency is improved, and the running stability of the elution device 2 is greatly improved by arranging the limiting assemblies 204, so that the practicability of the elution device is improved;
the cleaning assembly 306 is composed of an electric push rod 3061, a push plate 3062 and a cleaning brush 3063, and residues generated by filtering can be cleaned conveniently, so that great convenience is provided for workers, the labor intensity is reduced, and the working efficiency of the invention is greatly improved;
the output shaft of the grinding motor 104 is movably arranged to penetrate through the housing 101 and extend into the housing 101, the output shaft of the servo motor 1067 is movably arranged to penetrate through the mounting seat 1066 and extend out of the mounting seat 1066, one side of the cam 1068 close to the extrusion block 1065 is abutted against the cam 1068, the output shaft of the rotating motor 202 is movably arranged to penetrate through the supporting frame 201 and extend to the outer side of the supporting frame 201, the other end of the rotating drum 203 is rotatably arranged on the inner wall of the supporting frame 201 through a ball bearing, and one side of the supporting ball 2043 close to the rotating drum 203 is arranged to roll on the outer wall of the rotating drum 203.
Example 3
As shown in fig. 5, the difference between this embodiment and embodiment 1 is that a material guiding inclined plate adapted to the bottom of the inner wall of the casing 101 and corresponding to the position of the discharge port 103 is fixedly connected to the bottom.
By adopting the technical scheme, the crushed silver-containing film can be drained, so that the convenience and the thoroughness in discharging of the crushed silver-containing film are improved, and the practicability of the silver-containing film is improved.
For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.
In practical application, the silver-containing film is crushed into small fragments with the width of 20-40 mm and the width of 20-40 mm through the crushing device 1, then the crushed silver-containing film is put into the elution device 2, the silver-containing fragments are eluted, then the solution is naturally settled, the solution is filtered through the filtering device 3, then dried silver-containing mud is reacted with water vapor through the microwave gasification reaction device to obtain coarse silver particles, and finally, a standard silver ingot product is further obtained through a metallurgical method.
The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.
Claims (10)
1. A method of recovering silver from silver-containing waste film, comprising the steps of:
s1, crushing the silver-containing waste film into small fragments with the length of about 20-40 mm and the width of about 20-40 mm by using a crusher;
s2, washing silver from the silver-containing waste film fragments by using an alkali solution in a roller device, filtering after the reaction is finished to obtain film fragments and an alkali washing solution, washing the film fragments by using water to obtain clean film fragments and film washing water, mixing the film washing water and the alkali washing solution to obtain a silver-containing solution, and recycling the clean film fragments;
s3, adjusting the pH value of the silver-containing solution by using acid, naturally settling the solution after reaching a target value, filtering after the natural settling is finished to obtain silver-containing mud and neutralized liquid, returning the neutralized liquid to an alkali liquor silver-eluting process or a wastewater treatment process, and drying the silver-containing mud by using a dryer;
s4, reacting water in a steam generator to generate steam, reacting the steam and the silver-containing mud in a microwave gasification reaction device to obtain coarse silver particles and gasified gas, washing the gasified gas with water to obtain washing wastewater and washed gas, drying and fully combusting the washed gas to obtain products of carbon dioxide and water, wherein the gas has no peculiar smell or odor, and the wastewater after the gas is washed is sent to a wastewater treatment system for treatment;
and S5, further recovering and producing standard silver ingot products from the coarse silver particles collected from the microwave gasification reaction device by a metallurgical method.
2. The method for recovering silver from silver-containing waste films according to claim 1, wherein the addition amount of sodium hydroxide in the alkali liquor is 2-10% of the mass of the silver-containing waste films, the reaction temperature of the alkali liquor for eluting the silver in the silver-containing film fragments is 70-90 ℃, the reaction time of the alkali liquor for eluting the silver in the silver-containing film fragments is 1-4 h, the pH value of the silver-containing solution is adjusted to be 2-5 by the sulfuric acid solution, the microwave gasification temperature is 600-960 ℃, the optimal temperature is 700-800 ℃, the mass ratio of water vapor and silver mud (after drying) in the microwave gasification is 2: 1-5: 1, the optimal value is 3:1, the microwave gasification time is 1-3 h, the optimal value is 2h, and the combustion temperature of gas generated by the microwave gasification is 700-1200 ℃.
3. An apparatus for recovering silver from silver-containing waste film, comprising:
the crushing device (1) comprises a shell (101), a feeding hopper (102), a discharge port (103), two crushing motors (104), two crushing rollers (105) and an anti-blocking assembly (106), wherein the feeding hopper (102) is fixedly installed above the shell (101), the discharge port (103) is formed in the bottom of the side face of the shell (101), the two crushing motors (104) are symmetrically installed on the left side of the shell (101), the two crushing rollers (105) are symmetrically arranged inside the shell (101), the two crushing rollers (105) are respectively and fixedly connected with output shafts of the two crushing motors (104), and the anti-blocking assembly (106) is installed inside the shell (101) and corresponds to the position of the feeding hopper (102);
the anti-blocking assembly (106) comprises a shaking frame (1061), two limiting slide rods (1062), two return springs (1063), two extrusion rods (1064), extrusion blocks (1065), a mounting base (1066), a servo motor (1067) and a cam (1068), wherein the shaking frame (1061) is arranged in the shell (101) and corresponds to the position of the feeding hopper (102), one ends of the two limiting slide rods (1062) are symmetrically connected to one side of the shaking frame (1061), the other ends of the limiting slide rods (1062) movably penetrate through the shell (101), the two return springs (1063) are respectively sleeved on the surfaces of the two limiting slide rods (1062), one ends of the two extrusion rods (1064) are symmetrically connected to the other side of the shaking frame (1061), and the other ends of the extrusion rods (1064) movably penetrate through the shell (101), the extrusion blocks (1065) are fixedly connected to the other ends of the two extrusion rods (1064), the mounting seat (1066) is fixedly mounted on the side surface of the housing (101) and corresponds to the position of the extrusion block (1065), the servo motor (1067) is fixedly mounted at the bottom of the mounting seat (1066), and the cam (1068) is fixedly mounted on an output shaft of the servo motor (1067);
the elution device (2) comprises a support frame (201), a rotating motor (202), a rotating drum (203) and two limiting assemblies (204), wherein the rotating motor (202) is fixedly installed on the side surface of the support frame (201), the rotating drum (203) is arranged inside the support frame (201), one end of the rotating drum (203) is fixedly connected with an output shaft of the rotating motor (202), and the two limiting assemblies (204) are symmetrically installed at the bottom of the inner wall of the support frame (201) and correspond to the positions of the rotating drum (203);
the limiting assembly (204) comprises a supporting column (2041), an arc-shaped supporting plate (2042) and a plurality of supporting balls (2043), the bottom of the supporting column (2041) is fixedly connected to the supporting frame (201), the arc-shaped supporting plate (2042) is fixedly connected to the top of the supporting column (2041), and the plurality of supporting balls (2043) are arranged on the inner wall of the arc-shaped supporting plate (2042) at equal intervals;
the filter device (3) comprises a filter shell (301), a water inlet (302), a water outlet (303), a filter screen (304), a slag hole (305) and a cleaning assembly (306), wherein the water inlet (302) is arranged at the top of the filter shell (301), the water outlet (303) is arranged at the bottom of the side surface of the filter shell (301), the filter screen (304) is fixedly arranged on the inner wall of the filter shell (301), the slag hole (305) is arranged at the side surface of the filter shell (301) and corresponds to the position of the filter screen (304), and the cleaning assembly (306) is arranged at the side surface of the filter shell (301) and corresponds to the position of the filter screen (304);
the cleaning assembly (306) comprises an electric push rod (3061), a push plate (3062) and a cleaning brush (3063), the electric push rod (3061) is fixedly installed on the side face of the filter shell (301), the output end of the electric push rod (3061) movably penetrates through the filter shell (301), the push plate (3062) is fixedly connected to the output end of the electric push rod (3061), and the cleaning brush (3063) is fixedly connected to the bottom of the push plate (3062) and is abutted against the upper portion of the filter screen (304).
4. The device for recovering silver from silver-containing waste films according to claim 3, wherein a material guiding inclined plate matched with the bottom of the inner wall of the shell (101) and corresponding to the discharge hole (103) is fixedly connected with the bottom.
5. The apparatus for recovering silver from silver-containing waste film according to claim 3, wherein the output shaft of the shredding motor (104) is movably disposed through the housing (101) and extends to the interior of the housing (101).
6. The apparatus for recovering silver from silver-containing waste film according to claim 3, wherein the output shaft of the servo motor (1067) is movably disposed through the mounting seat (1066) and extends to the outside of the mounting seat (1066).
7. The apparatus for recovering silver from silver-containing waste film according to claim 3, wherein the side of the cam (1068) adjacent to the pressing block (1065) interferes therewith.
8. The device for recovering silver from silver-containing waste film according to claim 3, wherein the output shaft of the rotating motor (202) is movably arranged through the supporting frame (201) and extends to the outer side of the supporting frame (201).
9. The apparatus for recovering silver from silver-containing waste film according to claim 3, wherein the other end of the rotary drum (203) is rotatably mounted on the inner wall of the supporting frame (201) through a ball bearing.
10. The apparatus for recovering silver from silver-containing waste film according to claim 3, wherein the supporting ball (2043) is arranged to roll with the outer wall of the rotary drum (203) on a side close to the rotary drum (203).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114107665A (en) * | 2021-11-03 | 2022-03-01 | 韶关鹏瑞环保科技有限公司 | Film desilvering recovery process |
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| CN103074497A (en) * | 2013-01-24 | 2013-05-01 | 惠州Tcl环境科技有限公司 | Method for recovering silver from waste film |
| CN112111653A (en) * | 2020-09-29 | 2020-12-22 | 东莞市银辉环保科技有限公司 | Comprehensive utilization and silver recovery processing method for waste film |
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| CN103074497A (en) * | 2013-01-24 | 2013-05-01 | 惠州Tcl环境科技有限公司 | Method for recovering silver from waste film |
| CN112111653A (en) * | 2020-09-29 | 2020-12-22 | 东莞市银辉环保科技有限公司 | Comprehensive utilization and silver recovery processing method for waste film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114107665A (en) * | 2021-11-03 | 2022-03-01 | 韶关鹏瑞环保科技有限公司 | Film desilvering recovery process |
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Denomination of invention: A device for recovering silver from silver containing waste film Granted publication date: 20230512 Pledgee: Zhejiang Shaoxing Hengxin Rural Commercial Bank Co.,Ltd. Qiangtou Sub branch Pledgor: SHAOXING JINYE ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2024980025335 |
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