System of producing PGM metal ingots from consumed catalysts in a non-polluting method

Abstract

The invention is a system for producing PGM metal ingots from consumed catalysts in a non-pollutant way. It aims to separate valuable and rare metals like rhodium, palladium, and platinum from catalysts using a non-acidic flotation method, thus solving the issues associated with traditional separation methods. The system comprises mechanical, chemical, and electrochemical parts, including a ball mill device, flotation cell, and laboratory induction melting furnace. Monoliths with different geometric shapes enter the ball mill's grinding chambers and undergo a softening and powdering process. Plastic liners are used to prevent abrasion and the combination of the ball mill cylinder metal with the catalyst material.

Description

System of producing PGM metal ingots from consumed catalysts in a non-polluting method

[0001] The innovation involves a system designed to extract PGM (platinum group metal) ingots from spent catalysts in an environmentally friendly manner. Its objective is to separate valuable and rare metals like rhodium, palladium, and platinum from catalysts using a non-acidic flotation technique, thereby resolving the challenges associated with traditional separation approaches. The system comprises mechanical, chemical, and electrochemical elements, including a ball mill device, flotation cell, and laboratory induction melting furnace. Various shaped monoliths undergo a softening and powdering process within the ball mill's grinding chambers. To prevent abrasion, plastic liners are utilized, and a combination of the ball mill cylinder metal with the catalyst material is implemented.

[0002] B01J 27 / 045

[0003] WO2018190419 - METHOD FOR PRODUCING METAL INGOT

[0004] To provide a method for producing a metal ingot, the method being capable of preventing impurities contained in molten metal in a hearth from mixing into the ingot. [Solution] A method for producing a metal ingot using an electron-beam melting furnace that is provided with an electron gun and a hearth for storing molten metal of metal raw materials, wherein the metal raw materials are supplied to the position of a supply line disposed along a second sidewall of the hearth for storing the molten metal of the metal raw materials. A first irradiation line, which is disposed along the supply line on the surface of the molten metal and is disposed closer to the center of the hearth than the supply line, is irradiated with a first electron beam. As a result, the surface temperature (T2) of the molten metal in the first irradiation line is more elevated than the average surface temperature (T0) on the whole surface of the molten metal in the hearth, so as to form a first molten metal flow flowing from the first irradiation line towards the supply line on the surface layer of the molten metal.

[0005] The mentioned invention is a method for producing metal ingots, in general. Our invention though intends to produce PGM ingot from the catalysts.

[0006] JP2005240118 - METHOD FOR MELTING METAL AND METHOD FOR PRODUCING METAL INGOT

[0007] To provide a melting method by which metal powder (gold powder) can be subjected to high frequency melting without granulating the same, and the melting can be efficiently performed with an energy cost suppressed, and to provide a method for producing an ingot by the melting method. SOLUTION: The method of melting gold comprises: a stage wherein gold in a liquid is extracted into an organic solvent; a stage wherein the gold-containing organic solvent is subjected to acid pickling; a stage wherein a reducing agent is introduced into the organic solvent subjected to the acid cleaning to reductively precipitate the gold; a stage wherein the reduced gold is recovered and cleaned, and is thereafter dried to obtain gold powder; a stage wherein the gold powder is calcined at 300 to 600C; a stage wherein the calcined gold powder is subjected to press forming so as to be pellets suitable for high frequency melting; and a stage wherein the gold pellets are subjected to high-frequency melting. The method for producing a gold ingot is based on the melting method.

[0008] The invention above refers to a method for producing metal ingots, while our invention is about producing PGM ingots.

[0009] JP2009172665 - METHOD FOR PRODUCING HIGH MELTING POINT METAL INGOT

[0010] To provide a method for producing a high melting point metal ingot using electron beams, particularly, a melting method which can effectively melt a metal ingot having an excellent cast skin. SOLUTION: Disclosed is a method for producing a high melting point metal ingot where, while feeding molten metal into a mold composing an electron beam melting furnace and forming a mold pool, a cooled and solidified ingot in the vicinity of the bottom part of the mold pool is drawn out while being rotated, wherein the drawing distance per rotation of the ingot is smaller than the depth of the mold pool. Further, electron beams are emitted along the peripheral part of the mold pool adjacent to the mold in the mold pool.

[0011] The mentioned invention introduces a method for producing ingots of high melting point metals, while ours suggests a way to make ingots from consumed catalysts.

[0012] JP1994134551 - METHOD AND APPARATUS FOR PRODUCING METAL INGOT

[0013] To provide a method and an apparatus for producing a large-scale metal ingot having remarkably fine crystal structure as a material having small anisotropy and excellent mechanical property, particularly toughness, even if the plastic working is executed.

[0014] CONSTITUTION: Molten metal 5 is continuously poured into a narrow gap between a water-cooling copper mold 6 without the bottom and a cylindrical stirring rod 3 having spiral groove set in the mold 6. The molten metal 5 is rapidly cooled, and the solidification is progressed and at the same time, a stirring rod 3 is vigorously and intensely stirred with a motor 1 through a coupling 2, and the solidified crystal grain is made to be fine to produce semi- solidified slurry 8. By accumulating this semi-solidified slurry 8 into a vessel 9 heated to the semi-solidified slurry temp. or lower, the large-scale ingot composed of fine solidified structure is produced.

[0015] The mentioned invention is a method for producing ingot in general, while our invention suggests a way to produce PGM ingots.

[0016] JP2023096648 - DEVICE, METHOD AND PROGRAM FOR PRODUCING METAL INGOT

[0017] To provide a device and a method for selectively producing and providing a high-quality metal ingot, and a program for practicing the method. SOLUTION: A device for producing a metal ingot comprises a chamber, a hearth, a mold, an imaging device and a control device. The hearth is placed at the inside of the chamber to receive metal-containing raw material. The mold is also placed at the inside of the chamber so as to be injected with a molten metal formed at the inside of the hearth. The imaging device is placed at the outside of the chamber to acquire a dynamic image of the mold. The control device identifies the molten metal and solid metals based on the acquired dynamic image.

[0018] The invention above is a method for producing metal ingots while ours suggests a specific method for PGM ingot producing.

[0019] US20200199713 - METHOD FOR PRODUCING PLATINUM GROUP METAL OR PLATINUM GROUP-BASED ALLOY

[0020] A method for producing a platinum group metal or a platinum group-based alloy according to the present invention includes a preparing step of weighing a raw material that is partially or entirely of powder, a molding step of molding and solidifying the prepared raw material to obtain molded bodies, a sintering step of sintering the molded bodies to obtain a sintered body, a melting step of melting the sintered body to produce a molten ingot, and a deformation processing step of processing the molten ingot. In the sintering step, the molded bodies are sintered in a stacked state to produce a sintered body as a joined body.

[0021] The invention above is a method for producing PGM alloys, while ours suggests a way for producing PGM ingot.

[0022] Using a non-polluting method, a system has been designed to produce PGM (platinum group metals) ingots from used catalysts. The system comprises three main parts: mechanical, chemical, and electrochemical. The process involves grinding and softening the materials, flotation, and electrochemical reactions. After a series of steps, the resulting platinum powder is melted to create an ingot.

[0023] in most refineries and petrochemical Industries and other applications including automobile catalysts, after a specific time, these pieces lose their functionality as catalysts and cause serious problems, so it does not need to be replaced by new catalysts. Valuable and rare metals like rhodium, palladium, platin, and sometimes a small amount of other metals, considering their function and where and how they are used, are used as catalysts in these industrial pieces, more useful methods with less pollution are needed to separate these metals from their monolith bedding with different geometric shape and transfer any of these metals to ingots. In existing usual methods, acids and hazardous materials like cyanide are used under high-temperature or chlorine gas and chloride leach to solve and extract these metals again, because they have extremely high chemical resistance, especially for rhodium, one of the most dangerous and strong acids are used so it is somehow separated and in the next steps it precipitated with different precipitators that the low-value monolith which is usually alumina and bauxite, reacts with these acids and creates the need for much more amount of this chemical substance, as well as more concentration, that makes the separation process more dangerous and pollutant, also more complicated and non-optimized. Considering that in the new system, the separation of the bedding material, the monoliths, and the whole PGM metals or the platinum group metals happens in a non-acidic way with the flotation method with high efficiency, the above-mentioned problems are solved.

[0024] The PGM metal separating method that exists in catalysts and includes palladium, platinum, and rhodium, is a leaching and acidic hydrometallurgy process using nitric acid and hydrochloric acid, chlorine gas, Florine, sodium cyanide and other dangerous materials with dangerous doses and amounts for most catalysts that in future, the precipitation of dissolved metals in these acids, happens with low efficiency by chemical precipitants like dimethylglyoxime, ammonium chloride and zinc powder and different methods with low efficiency which is a non-efficient and dangerous process and have serious environmental problems.

[0025] Based on the research on relevant sites, no device or system exists to separate these metals from the catalysts using the flotation method. The disadvantages of existing usual methods for separating and exploiting the Platinum group metals from the catalysts are as follows:

[0026] 1- considering the high chemical resistance of the dominant usual metals used for catalysts like platinum, palladium, and especially rhodium, they are not completely soluble despite using high amounts of strong acids.

[0027] 2- the dissolving process by leaching and hydrometallurgy by Chlorine gas, Florine, Nitric acid, Chloride acid, Hydrofluoric acid, potassium cyanide, and sometimes concentrated sulfuric acid with different compounds and different temperatures and pressures are used that are so dangerous and problematic.

[0028] 3- To increase the effect of different materials in dissolution, the temperature is one of the effective parameters in the process, making the whole process much more pollutant and dangerous.

[0029] 4- Due to the dissolution of high amounts of material and powder and grinding dust of grinded catalyst which is mostly the combination of one or two grams of PGM metals per one kilogram of powder and dust inside the solvent and the leaching agent, with high amount of absorbed pollution inside the leaching agent that causes problems for the reactive precipitation and reduces the efficiency and purity of the solution.

[0030] 5- the impossibility of preventing a reaction between the leaching agent and dissolution agent with the bedding material like alumina and bauxites makes the need for high amounts of acids.

[0031] 6- The materials that are used as bedding and monoliths with different shapes are considered highly pollutant tailings that have no value and remain as tailing and dangerous wastewater from the common methods.Solution of problem

[0032] This device is made of three main parts: mechanical parts, chemical parts, and electrochemical parts.

[0033] The mechanical part of the device includes the ball mill device, flotation cell, and laboratory induction melting furnace. Monoliths with different geometric shapes enter the grinding chambers of the ball mill and due to the alloy pellets equivalent to the weight of the broken and consumed pieces of the loaded catalyst material, the softening and powdering process is done, by the rotation of the ball mill cylinder with 80 percent of the critical speed of ball mill cylinder. To prevent abrasion and the combination of the ball mill cylinder metal with the catalyst material, plastic liners are used all around the inside surface of the ball mill and the final product of the ball mill is a powder with 200 mesh size. The produced powder mixes with water with the proportion of 40 percent powder and 60 percent water and enters the flotation cell. The flotation cell is another mechanical device in the system that due to the fragilities of this process, is designed specifically for this system the body is made of wear-resistant steel, and a hollow steel shaft as the rotor shaft, besides rotating the cell rotor concentrically inside the cell, transfers compact air to the placed nozzles around the rotor and producing air bubbles inside the cell. Temperature is applied as one of the important parameters in professional fragile flotation, by steel thermal element in the cell body and followingly the pulp body that considering the tests, 60 centigrade degrees is the optimized temperature. The catalyst’s powdered material with 200 mesh, enters the cell with water and the rotor starts rotating with a normal method, and the pulp’s pH reaches 9 with limestone and the surface of the PGM metals activates with an optimized amount of 20 grams per ton and the combination is done without air blowing and just by rotor rotation and after about seven minutes, the Potassium amyl xanthate collectors and in cases a combination of two dithiophosphate collector with mercaptan as PGM’s professional collectors with the amount of 50 grams per ton is used that after seven minutes, the pine oil or Methyl Iso Butyl Carbinol is applied with an amount of 40 grams considering the palp’s physical and chemical properties is applied and with keeping the pulp’s temperature close to 60 centigrade degrees, the air compressor valve opens and flotation of the metals begins. The metal particles of palladium, platinum, and rhodium are gathered and guided, and the bedding powdered material and the monolith in the bottom remain at the bottom of the cell after the flotation is over, it is emptied from the bottom of the cell. The compressed air compressor for bubble-making inside the flotation cell and inside the laboratory induction melting furnace is one of these systems’ equipment that is used for melting metals with high melting temperatures, due to its need for a temperature of 2000 centigrade degrees, which is used for melting concentrate with cutie more than 80 percent produced from this process.

[0034] The chemical part includes a reaction between the material inside the pulp with collectors and powdered metal material and the valuable metal materials, due to the galvanic and chemical interactions and the attachment of the air bubbles to their hydrophilic head, it is directed and transferred to the extracellular space and the concentrate canal placed at the top of the cell.

[0035] The electrochemical part includes an electrochemical cell and a combination of three metals: rhodium, palladium, and platinum resulting from the induction furnace at the previous stage and it is poured into a plate mold and used as the anode alloy in the electrolysis process, and nitric acid is used inside the cell for electrolysis with a ratio of 20% to the electrolyte solution and palladium metal sediment is created on the steel plate and it is used as a cathode which when the process is over, the precipitated palladium on the raw cathode plate, is separated with a spatula. 2 / 5 ampere is used for each 10×10-centimeter cathode and the produced cathode has a purity of more than 99 / 5 that the platinum and rhodium participate as anode mud. This mud which contains platinum and rhodium leaches and dissolves in an hour by aqua regia due to its low volume that its amount is usually one-thousandth of the weight of primary raw materials of catalysts, and the rhodium is not soluble in this condition and remains as mud at the bottom of the plate. After the filtration, the remaining rhodium residue that melts with the fire of Oxy-acetylene or induction melting furnace and the solution containing platinum also precipitates with different methods by adding variable precipitants like ammonium chloride and segmentation method and zinc powder, etc. and the precipitated platinum powder melts again and becomes an ingot.Advantage effects of the invention

[0036] - in this system, the separation is done by flotation which is non-pollutant and danger-free in comparison to the other usual methods

[0037] – chloride gas, Florine, hydrochloric acid, nitric acid, sulfuric acid, cyanides, and other dangerous materials are not used and only in the final level and the anode bar refinery with the electrochemical method, the amount of one-thousandth in comparison to the previous nitric acid methods.

[0038] – this system has no air, water, or soil pollution and produces no wastewater.

[0039] – the produced tailing resulting from concentration is a saleable product and it is sold without any pollution or chemical changes, as raw material and bauxite

[0040] – the separation of noble metals from bauxite materials of catalysts’ bedding, has a very low separation and exploitation cost and the most important materials used in the process, are the flotation and collector materials that due to the very low volume of 50 grams per ton, it has no much cost.

[0041] – due to the non-usage of strong dangerous acids and their temperature increase during the process, a very safe condition for the person and environment prepares.

[0042] – while the extraction of the mentioned metals from the catalysts, in this system, the pollution is so low and there is no need for a system to transfer poisonous killing smoke of the acids and chlorine, Florine and hydrogen cyanide, etc. or any security precautions during the process.

[0043] – due to separating the metals and the catalysts’ bedding material in the cell, these materials are distinct with a high assuring percentage and this is while in the previous methods, high amounts of these materials react with the solvent while leaching and enter the solution phase which makes newer problems and it affects the recovery efficiency and the cutie of the resulting metals.

[0044] – Extraction and production of ingots using the flotation method are much faster than the traditional methods as each flotation cycle takes less than an hour.

[0045] : compressor air

[0046] : Tubular outer diameter rotor shaft

[0047] : outlet of the softened material

[0048] : ball mill power transmission device

[0049] : graffiti bush of the induction melting furnace

[0050] : the cylinder filter

[0051] : diagram block and the process

[0052] : 1. a: the compressor air entrance to inside the cell and pump that the debit rate of high-pressure current is settable with the built-in slide valve

[0053] 1. b: Rotor Shaft Bearings which are two ball bearings with a 70milimeter internal diameter on top and the bottom and prepare the rotor shaft rotation in concentric form

[0054] 1. c: foley and the transferring belt that transfers the electromotor rotation to the rotor shaft and its diameter is 400 millimeters as a result of connecting to the with an 80 mm diameter, and prepares the rotation ratio of one fifth, 280 rotates per minute in the rotor flotation cell

[0055] 1.d: the rotor shaft with an external diameter of 70mm and internal diameter of 50mm and one meter long, that is in hallow form and has the duty of rotating the rotor’s blade at the center of the cell and the air current transfers from the central part of it to the bottom part of the cell storage and by the installed nozzles placed at the bottom of the rotor shaft, and the bubbling happens inside the pulp.

[0056] 1. e: the canal for guiding the floated material and foam to the extracellular space that after the flotation of metal particles with foam, it pours into this slope canal, and due to the slope at the bottom of the canal, it transfers to the flange and transfers to the outlet of the concentrate

[0057] 1. f: the hot water copper pipes with 30mm diameter that the hot water inside is constantly in current and for increasing the pulp temperature, and it is fastened all around the storage and a heating package device is used for increasing the temperature of the water inside these pipes with the possibility of setting the temperature on the package device or heating device.

[0058] 1. g: the chassis and the holder of the flotation cell which is one meter long and two I-beams number 14 are used for this aim.

[0059] 1. h: Three-quarter inch high-pressure air inlet pipe of the compressor into the rotor and cell

[0060] 1. i: the electromotor with 2.2-kilowatt power 1400 revolutions per minute with the possibility of setting the rotation speed

[0061] 1. j: the flange and the 4-inch foam outlet pipe containing concentrate which is at the lowest part of the water canal containing foam and concentrate

[0062] 1. k: the flange and the trailing outlet pipe and pulp from inside the cell which after the end of the flotation process, the bauxite and PGM-free residue discharge from this part by opening the valve connecting to it

[0063] 1. l: the outlet nozzles for discharging compressed air with a 3mm internal diameter for bubbling inside the pipe

[0064] 1. m: stator with 50-centimeter external diameter, 30-centimeter internal diameter, and 20-centimeter height which is made of an anti-wear sheet, and its duty is to prevent the axial rotation of solution and pulp during rotor rotation and to guide the pulp rotating current from the center of the rotor to outside of the center and makes the efficiency of the cell to increase and it also preventing destructive waveform turbulence inside the flotation cell

[0065] 1. n: Pin and bush of transferring compressed air to the rotating rotor shaft which has a ball bearing as a seal and a bush which is fastened to the shaft by a thread and its internal perforated pin is fastened to the compressed air tube and the pin at the center has a steady movement and the lateral bush rotates with the rotor and by the seal and the compressed air ball bearing that is installed, transfers to the nozzles at the end of the rotor without the possibility to quit from this area, and quit by the nozzles from the lowest part of the floatation cell and bubble making happens inside the pulp.

[0066] : 2. a: the outlet of the softened material from inside the ball mill device with the mechanism of dry softening

[0067] 2. b: the ball mill storage gear

[0068] 2. c: the ball mill storage rail which is made in a rolling form and has been welded to the ball mill pipe

[0069] 2. d: the access door to the inside of the ball mill storage

[0070] 2. e: the front ball mill door which is closed to its place by bolt and nut in a flange form

[0071] 2. f: the entrance of the ball mill material

[0072] 2. g: the foley of the ball mill power transmission device which reduces 1400 revolutions per minute of the electromotor to 28 revolutions per minute on the ball mill cylinder storage

[0073] 2. h: the fixed bearing and guidance, and the rotation of the ball mill cylinder which is made under casting and turning operations

[0074] 3. a: The propylene body of the electrolysis cell which may be from one to five liters used and in case of need, different anti-acid materials are used for the body, in different shapes and with different capacities.

[0075] 3.b The 316-steel cathode sheet with a half to one-millimeter thickness and copper sheet holder is used as a floated cathode inside the electrolyte solution and the rectifier negative current is connected to it, with a connecting plier

[0076] 3. c: The seat and the copper holder which is used for holding the cathode and anode metal in floating form inside the electrolyte solution, which the added anode in the melting stage, which has been poured into the mold with a thickness of about half to one centimeter and shaped an ingot, and it is floated by a metal gear and is floating inside the electrolyte solution.

[0077] 3.d: the wire connecting the negative pole to the cathodes

[0078] 3. e: The cathode sheet from 316 steel material with a thickness of one millimeter and dimensions of 10×10 centimeter that the palladium metal precipitates as a cathode, and after the end of the process, the palladium metal is separated from it with a spatula, in a sheet form.

[0079] 3. f: The wire that connects the positive pole to the anode alloy in sheet form

[0080] 3. g: the standard laboratory switching rectifier with the possibility of setting the current, voltage, and DC outlet

[0081] : 4. a: a two-kilogram graffiti bush of the induction melting furnace

[0082] 4. b: induction melting furnace

[0083] : 5. a: the cyclone which has the duty of gathering the dust and the micronized powder that exits in the ball mill with a suction device

[0084] 5. b: the cylinder filter, using a filter tissue to prevent the dust from exiting, and the micronized powder and dust are guided inside the accumulation tank

[0085] 5. c: the accumulation storage of micronized powder that is in contact with the outer space in sealing form, stores these materials.

[0086] : the diagram block and the process that the entrance material to those catalysts are useless and consumed which after their extinction time, they get out of order and replace. And four other products (bauxite powder, palladium cathode, platinum ingot, ingot, or rhodium bullet) from the system, by considering the mentioned details.Examples

[0087] The raw materials of consumed catalysts that are sometimes found in the crushed form in automobile catalysts, enter the ball mill and after an hour, mesh size 200 powder material exits the ball mill valve. The flotation cell is filled with water with the determined amount, considering the weight of the powder, and the rotor rotation is added to it so that the weight percent of the palp reaches 40 percent and water, 60. Considering the previous explanations, the activators, collectors, and the foamer is applied in this phase with specific timing and a predefined amount.

[0088] After a maximum of one hour of cell work, all the metals are transferred to the foam and concentrated by the bubble, and the bedding material and monoliths remain in tailing as gangue. By opening the drain valve of the flotation cell, these materials transfer to the desired point and the water and bauxite tailing and bedding are separated with different filtering methods or by precipitating. The resulting concentrate that reaches one-fifth of the concentrate weight which is mostly borax, mixes and loads inside the induction furnace and after the metal is melt, it is poured into a rectangular plate mold which makes a plate alloy bar. The resulting ingot can be installed in the anode place and inside the electrolysis cell, and connect the positive switching rectifier. We fill the little electrolysis cell from the nitrate electrolyte solution with the ratio of twenty percent nitric acid to water, which is already prepared and the electrochemical process begins while we dedicate enough time for the reaction until nothing remains from the anode bar. After the anode alloy bar is over, we take the cathode plate which is connected to the negative pole of the rectifier, and separate the pure palladium from the steel cathode plate, with a spatula.

[0089] We filter the mud and unsolved sediment at the bottom of the electrolysis cell resulting from the electrochemical process which includes rhodium and platinum and considering the very low volume of this mud and sediment compared to the catalysts’ raw material, we do the leaching process for an hour in normal temperature and in laboratory scale and again, after the filtration and separation of this solution that consists rhodium at the bottom of the plate and we separate the platinum that remains in aqua regia with the ratio of one forth of nitric acid and hydrochloric acid. The solid rhodium sediment that the aqua regia is not capable of dissolving, is directly melted and bullion cast by induction melting furnace or Oxyacetylene flame. In continue, the precipitating of platinum from aqua regia is done with variable methods including the use of cementation method with iron or copper sheet, adding ammonium chloride to the solution and formation of platinum sediment and precipitating of this sediment or adding zinc powder and the formation of platinum solid precipitate inside the solution is done, and the resulted powder is melted after filtering and being washed with water and it is cast in mold, considering the volume of the melted metal, it is cast like a ingot.

[0090] The recycling units of noble metals like platinum, palladium, and rhodium from defective consumed catalysts of petrochemical industries and the catalysts of light and heavy automobiles of the fragile petrochemical industrial piece production unit, and the layering of the noble metals with special chemical applications.

Claims

A system for producing PGM metal ingots from the consumed catalysts with a non-pollutant method consisting of:The mechanical part including the ball mill device for grinding and softening the bedding materials and monoliths and producing powder with 200 mesh, flotation cell, and inducting melting furnaceThe chemical part including the reaction between the existing material inside the pipe with the collectors and metal powdered materialThe electrochemical part includes an electrochemical cell that is a combination of rhodium, palladium, and platinum is used inside, as the anode alloy and a steel sheet has been used as a cathode in the electrolysis processAccording to the claim. 1, by using the ball mill device, monoliths with different geometric shapes have been loaded into the grinding storage, and the ball mill storage due to the existence of alloy pellets equivalent to the catalysts’ material weight and by the rotation of the ball mill cylinder with eighty percent of the critical condition speed, the softening and powdering is done which the final product of the ball mill is a 200-mesh size powder.According to the claim. 2, plastic liners are used the whole inside round of the ball mill to prevent wear and mixing of the ball mill cylinder metal with the catalyst materials.According to the claim. 1, in the flotation cell, the body is in cylinder form from the anti-wear steel and it has a hollow steel as a rotor shaft that beside turning the rotor cell in concentric form, has the duty of guidance and transferring the compressed air to the placed nozzles around the rotor and has the duty of producing air bubbles inside the cell.According to the claim. 2, the resulting powder in water with a ratio of 40 percent of the volume weight powder and 60 percent water, enters the floatation cell.According to the claim. 5, the steel thermal element in the cell body and followingly, the pulp, are used for applying heat and the optimal temperature is 60 centigrade degrees.According to the claim. 6, the valuable metal material transfers to the extracellular space by the bubble air current movement and they are transferred to the concentrate canal placed at the top of the cell.According to the claim. 7, one liter of a five percent nitric acid is used inside the cell to create the palladium metal precipitant on the steel sheet cathode which after the end of the process, the precipitated palladium on the mother cathode sheet, is separated with a spatula.According to the claim. 8, 2.5 amperes per each 10×10-centimeter cathode, and the produced cathode has a purity of more than 99 / 5 percent that the platinum and unsolved rhodium in the nitric acid precipitate in the form of anode mud.According to the claim. 9, the mud containing platinum and rhodium, which has the one-thousandth weight of the primary raw materials after the filtration, solves in less than an hour at room temperature by regia aqua and the rhodium is not soluble in this condition and remains as mud at the bottom of the plate.According to the claim. 10, the remaining precipitant of rhodium melts with an Oxyacetylene flame or laboratory induction furnace, and the solution containing platinum with methods like ammonium chloride and cementation and the zinc powder precipitates and the resulting platinum powder melts again and turns into an ingot.

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