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WO2017143697A1 - Dispositif de récupération de déchets solides de l'industrie de l'aluminium/désulfuration à haute température de coke de pétrole et procédé d'utilisation de celui-ci - Google Patents

Dispositif de récupération de déchets solides de l'industrie de l'aluminium/désulfuration à haute température de coke de pétrole et procédé d'utilisation de celui-ci Download PDF

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Publication number
WO2017143697A1
WO2017143697A1 PCT/CN2016/085429 CN2016085429W WO2017143697A1 WO 2017143697 A1 WO2017143697 A1 WO 2017143697A1 CN 2016085429 W CN2016085429 W CN 2016085429W WO 2017143697 A1 WO2017143697 A1 WO 2017143697A1
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WIPO (PCT)
Prior art keywords
melting point
low melting
crystallizer
wall
petroleum coke
Prior art date
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Ceased
Application number
PCT/CN2016/085429
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English (en)
Chinese (zh)
Inventor
冯乃祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Beiye Metallurgical Technology Co Ltd
Original Assignee
Shenyang Beiye Metallurgical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201620141540.6U external-priority patent/CN205556753U/zh
Priority claimed from CN201610103505.XA external-priority patent/CN105603216B/zh
Application filed by Shenyang Beiye Metallurgical Technology Co Ltd filed Critical Shenyang Beiye Metallurgical Technology Co Ltd
Publication of WO2017143697A1 publication Critical patent/WO2017143697A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar
    • C10C1/19—Working-up tar by thermal treatment not involving distillation
    • 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
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/10—Obtaining alkali metals
    • 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
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/10—Obtaining alkali metals
    • C22B26/12—Obtaining lithium
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • 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

Definitions

  • the invention belongs to the technical field of metallurgical environmental protection, and particularly relates to an aluminum industrial solid waste recycling/ petroleum coke high temperature desulfurization device and a using method thereof.
  • Metallic aluminum is produced by cryolite-alumina molten salt electrolysis. In the entire production process from primary aluminum to primary aluminum purification, into metal ingots and alloy materials, the following types of waste are produced:
  • waste cathode carbon block containing sodium and electrolyte
  • waste fireproof containing electrolyte, metal sodium and refractory material to form sodium aluminosilicate Material lining
  • Fe-Al alloy formed by corrosion of aluminum alloy rod by aluminum
  • the patent technology can realize the above-mentioned solid waste from the original aluminum production to the purification, casting and alloying of aluminum, and the solid waste can be effectively separated and recycled.
  • the method and the device also have the following disadvantages and disadvantages:
  • the inner wall and inner lining of the entire upper structure of the vacuum resistance furnace of the technical device have no heat preservation measures, so the heat loss is large and the thermal efficiency is low;
  • the metal sodium or sodium potassium alloy separated from the waste is not easily removed from the furnace, and it is difficult to remove it from the sodium crystallizer;
  • the alkali metal separated from the solid waste is a Na-K alloy
  • the sodium-potassium alloy exists in a liquid form at normal temperature, and the liquid sodium-potassium alloy is difficult to peel off from the crystallizer, even if it is pure
  • the sodium metal is often adhered to the crystallizer in a very soft state at normal temperature.
  • Petroleum coke is the basic raw material for the manufacture of aluminum electrolysis carbon anodes in the aluminum metallurgical industry and the basic raw materials for the manufacture of graphite electrodes in the metallurgical industry. That is to say, the graphite electrodes used in metallurgical industry steelmaking and the carbon anodes used in aluminum electrolysis are made of petroleum coke. Stone The consumption of oil coke is huge. Taking aluminum electrolysis as an example, the carbon anode consumed per ton of metal aluminum produced by electrolysis is about 420-500 kg, and the petroleum coke consumed is about 600 kg. An electrolytic aluminum plant with an annual output of 500,000 tons consumes about 300,000 tons of petroleum coke per year. Petroleum coke is produced by coking of residual oil after petroleum smelting. It is a by-product of the petroleum smelting industry, so it is called petroleum coke.
  • the sulfur content in petroleum coke varies widely, from less than 0.5% to more than 10%, depending on the sulfur content of the petroleum used in the production of petroleum coke.
  • Petroleum coke can be divided into low sulfur coke and high sulfur coke according to its sulfur content.
  • there is no uniform standard for the classification of high sulfur coke Generally, petroleum coke with a sulfur content higher than 3% is considered to be high sulfur coke, which is low.
  • the petroleum coke with a sulfur content of 1.5% is considered to be low sulfur coke, and the petroleum coke with a sulfur content of 1.5 to 3.0% is considered to be medium sulfur coke.
  • the low sulfur coke content with a sulfur content of less than 1.5% is small, the market has low and low sulfur coke, and the price is also high.
  • the electrolytic aluminum plant can only mix low sulfur coke with high sulfur coke.
  • the petroleum coke after mixing has a sulfur content of about 2 to 3% or less, and has an increasing tendency.
  • the sulfur content does not have much influence on the quality of the aluminum electrolytic anode, but for electrolytic aluminum plants and electrode manufacturers, the impact of sulfur in the petroleum coke on the environment is enormous;
  • the amount of SO 2 produced by aluminum electrolysis per year is 10,000 tons.
  • the present invention provides an aluminum industrial solid waste recycling/petrogon coke high temperature desulfurization device and a method for using the same, and an aluminum electrolytic cell among aluminum industrial solid waste.
  • the scrap material or petroleum coke of the waste cathode carbon block is used as a resistance heating body
  • the furnace is made of refractory material
  • a high melting point crystallization chamber is arranged above the furnace
  • a low melting point material crystallization chamber and a liquid low melting point material collecting device are arranged outside the furnace shell.
  • the high-melting-point crystallization chamber and the low-melting-point crystallization chamber are respectively connected to the vacuum system, and the high-efficiency vacuum separation and recovery method is adopted to achieve high-efficiency separation of the aluminum industrial solid.
  • the aluminum industrial solid waste recovery/peech coke high-temperature desulfurization device of the invention comprises a furnace body, a low melting point material crystallizer at the rear end of the furnace body and a liquid low melting point material collector under the low melting point material crystallizer;
  • the furnace body is a furnace shell outside,
  • the outer wall of the upper part of the furnace shell is provided with a cooling water jacket, and the top is provided with a furnace cover which is sealed and connected with the furnace shell,
  • the furnace shell is provided with a heat insulating material layer, the heat insulating material layer is provided with a groove type refractory material wall, and the groove type refractory material
  • the wall body is composed of four side wall panels and one bottom wall panel;
  • the trough type refractory wall body is provided with a refractory concrete inner wall body;
  • the refractory concrete inner wall body is composed of three inner wall wall panels perpendicular to the bottom wall panel.
  • the height of the inner wall wall panel is lower than the height of the trough type refractory wall, and a part of the side wall panel of the refractory concrete inner wall body and the groove type refractory wall near the front end of the furnace body is formed into a rectangular parallelepiped auxiliary material chamber, and the groove type refractory material wall a space outside the auxiliary chamber inside the body serves as a main chamber;
  • the main chamber is used for placing a scrap of a waste cathode carbon block of an aluminum electrolytic cell as a resistance heating body, or for placing petroleum coke as a resistance heating body, Said
  • the petroleum coke is raw coke or calcined petroleum coke;
  • the top of the main material chamber is provided with a top cover of the main material chamber;
  • the inner wall of the refractory concrete is provided with a through hole, and the top of the inner wall of the refractory concrete is also provided with a slot type opening, a through hole and a trough type The opening connects
  • the above-mentioned low melting point material crystallizer is of a horizontal structure or a vertical structure, and an externally wound electric wire heating device and a cooling water pipe are alternately wound; when the low melting point material crystallizer is of a horizontal structure, the lower portion thereof is an inverted conical shape.
  • the bottom end of the inverted cone is connected to a collecting tube which communicates with the liquid low-melting substance collector through a valve, and the end of the low melting material crystallizer away from the furnace body is provided with an end cap and a low melting point material crystallizer Sealed connection;
  • the low melting point material crystallizer is of vertical structure, the low melting point material crystallizer consists of inclined section and vertical section, the inclined section is connected with the sleeve, and the lower part of the inclined section is connected with a collecting tube, the collecting tube
  • the valve is connected to the interior of the liquid low-melting substance collector, and the top end of the vertical section is provided with an end cap and a low-melting substance crystallizer.
  • the low melting point material crystallizer is provided with a baffle
  • the baffle is provided with a baffle through hole
  • the rear end vacuum exhaust pipe and the argon gas inflation pipe are located between the end cover and the baffle.
  • the top of the liquid low-melting substance collector is provided with a collector upper cover, and the collector upper cover is sealed and connected with the liquid low-melting substance collector; the collector upper cover and the collecting tube are fixed together.
  • a resistance wire and a cooling water pipe are alternately wound around the pipe.
  • the fragment material of the waste cathode carbon block of the aluminum electrolytic cell is placed in the main material chamber as a resistance heating body; the particle size of the scrap cathode material of the aluminum electrolytic cell waste cathode carbon block is ⁇ 8 cm;
  • the anode carbon residue, or the waste refractory material with a particle size of ⁇ 8cm is lined with pieces, or the waste refractory material is lined with pieces, and then mixed with aluminum ash and pressed to form a compressed aggregate, or waste refractory lining. After crushing the pieces, the pressed aggregate formed by mixing with the Fe-Al alloy powder having a particle size of less than 100 mesh, or the silicon nitride block combined with the waste silicon nitride having a particle diameter of ⁇ 8 cm is placed in the auxiliary material chamber;
  • the material condensed in the crystallization chamber of the high melting point substance is taken out.
  • the material condensed in the crystallization chamber of the low melting point substance is an alkali metal or an alkali metal alloy, and the alkali metal alloy is a sodium potassium alloy, a sodium containing lithium metal or a sodium potassium alloy containing lithium, and a high melting point substance.
  • the material condensed in the crystallization chamber is a fluoride salt electrolyte.
  • the low melting point material crystallizer is heated to melt the condensed material on the inner wall, and the temperature in the crystallizer of the low melting point substance is controlled to be higher than the melting point of the low melting point material by 30 to 100 ° C.
  • the low melting point substance is an alkali metal or an alkali metal alloy.
  • step 2 the waste refractory lining pieces are ground and mixed with aluminum ash. Pressing the formed compact material, or the waste refractory material, the lining pieces are ground and mixed with the Fe-Al alloy powder having a particle size of less than 100 mesh, and the pressed aggregate is formed by pressing, and the waste refractory material is lined with the aluminum ash or Fe.
  • the chemical reaction formula of the Al alloy powder is based on:
  • Al is aluminum or an Al ash Fe-Al alloy powder of Al, Na 2 O and K 2 O in the waste pieces of the refractory lining Na 2 O and K 2 O.
  • the method for using the aluminum industrial solid waste recycling/ petroleum coke high-temperature desulfurization device of the invention, wherein the method for high-temperature desulfurization of petroleum coke is carried out as follows:
  • the petroleum coke is placed in the main material chamber as a resistance heating body; the particle size of the petroleum coke is ⁇ 8 cm;
  • the furnace body When the raw coke is used as the resistance heating body, the furnace body is evacuated to the air pressure ⁇ 80 Pa through the front end vacuum suction pipe; when the calcined petroleum coke is used as the resistance heating body, the furnace body is evacuated through the rear end vacuum suction pipe. To air pressure ⁇ 80Pa;
  • step 6 the low-melting substance crystallizer is heated to melt the condensed material on the inner wall, and the temperature in the crystallizer of the low-melting substance is controlled to be higher than the melting point of the low-melting substance by 30 to 100 °C.
  • the low melting point substance is elemental sulfur.
  • the low melting point material crystallizer is cooled by a cooling water pipe outside the low melting point material crystallizer, and the low melting point material crystallizer is heated by a resistance wire heating device outside the low melting point material crystallizer.
  • the treated aluminum electrolytic cell waste cathode carbon block contains CaF 2 , the melting point is 1402 ° C, and is separated from the waste cathode carbon block.
  • CaF 2 needs to be higher than the melting point of CaF 2 ; if it is not necessary to separate CaF 2 from the waste cathode carbon block, and the auxiliary material does not place other aluminum industrial solid wastes other than the waste cathode carbon block, the temperature of the resistance heating body is controlled at Between 1100 and 1200 ° C temperature.
  • a cooling water chamber is provided in the metal electrode, and the metal electrode is cooled by passing cooling water into the cooling water chamber.
  • the desulfurization rate of petroleum coke is ⁇ 90%.
  • the scrap material of the waste cathode carbon block of the aluminum electrolytic cell when used as the resistance heating body, the high melting point substance is condensed in the crystallization chamber of the high melting point substance, and the low melting point substance is condensed in the crystallization chamber of the low melting point substance;
  • the petroleum coke when used as the resistance heating element, the volatile matter is discharged from the front end vacuum pipe and collected, and the gaseous elemental sulfur enters the crystallization chamber of the low melting point substance and condenses on the low melting point material crystallizer.
  • the apparatus and method of the present invention can realize complete separation of carbon, alkali metal and electrolyte in the waste cathode carbon block of the industrial aluminum electrolytic cell, and complete separation of electrolyte, alkali metal and refractory components in the refractory material of the electrolytic cell lining, and
  • the separation of electrolyte and carbon in the anode carbon residue also makes efficient use of aluminum in the Al-Fe alloy formed by the aluminum ash and the cathode steel rod melted by aluminum, and the separated alkali metal is well recovered;
  • the process is free from waste residue, waste gas and waste water. It is an energy-saving and environmentally-friendly aluminum electrolytic solid waste treatment device, which is very suitable for large-scale application in industry.
  • the device and method of the invention can achieve the desulfurization rate of petroleum coke by more than 90%, not only can reduce the pollution of sulfur in the petroleum coke of the metallurgical industry, and can effectively recover sulfur in the petroleum coke; in addition, the petroleum coke can be desulfurized after high temperature. Reducing the swelling of the graphite electrode caused by sulfur during the graphitization process, which not only improves the heating rate during the graphitization of the electrode, but also improves the yield of the graphite electrode, thereby greatly reducing the power consumption during the graphitization of the graphite electrode. .
  • FIG. 1 is a schematic view showing the structure of an aluminum industrial solid waste recovery/ petroleum coke high-temperature desulfurization device with a low-melting substance crystallizer in a horizontal structure according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along line B-B of Figure 1;
  • Figure 3 is a cross-sectional view taken along line C-C of Figure 1;
  • Figure 4 is a cross-sectional view taken along line D-D of Figure 1;
  • FIG. 5 is a schematic structural view of an aluminum industrial solid waste recovery/ petroleum coke high-temperature desulfurization device with a low-melting-point material crystallizer in a vertical structure according to an embodiment of the present invention
  • the cooling water pipe is welded and fixed to the low melting point material crystallizer.
  • the groove type refractory wall and the refractory concrete inner wall are made of refractory material.
  • the sleeve, the low melting point material crystallizer, the liquid low melting point material collector, the baffle and the lift bag in the embodiment of the invention are made of stainless steel.
  • the material of the metal electrode is copper.
  • the material of the furnace shell and the furnace cover is a steel material.
  • the material of the main chamber upper cover and the prefabricated plate in the embodiment of the present invention is a refractory concrete prefabricated plate material.
  • the aluminum industrial solid waste recovery / petroleum coke high temperature desulfurization device structure is shown in Figure 1, the BB surface is shown in Figure 2, the CC surface is shown in Figure 3, the DD surface is shown in Figure 4, including the furnace.
  • the furnace cover 4, the furnace shell 1 is provided with a thermal insulation material layer 2, the thermal insulation material layer 2 is provided with a trough-type refractory material wall 3, and the trough-shaped refractory material wall 3 is composed of four side wall panels and a bottom wall panel;
  • the refractory concrete wall 3 is provided with a refractory concrete inner wall 7; the refractory concrete inner wall 7 is composed of three inner wall panels perpendicular to the bottom wall panel, the refrac
  • the main material chamber 14 is used for placing the scrap material of the aluminum cathode electrolytic cell waste cathode carbon block as a resistance heating body; the main material chamber 14 is provided with a main chamber upper cover 15; the refractory concrete inner wall body 7 is provided with a through hole 8 The top of the refractory concrete inner wall is further provided with a slot-shaped opening 9, and the through hole 8 and the slot-shaped opening 9 communicate the main chamber 14 and the auxiliary chamber 16;
  • the grid type refractory wall 3 is provided with two graphite electrodes 10 on the side wall plate near the front end of the furnace body, two graphite electrodes 10 are located on both sides of the auxiliary chamber 16, and one end of the two graphite electrodes 10 is respectively connected with a metal electrode 11 Assembled together, the metal electrode 11 is sealed and fixed on the furnace shell 1 by the sealing device 13, and the other ends of the two graphite electrodes 10 are connected to both ends of the resistance heating body;
  • the top of the groove type refractory wall 3 is provided with a prefabricated plate 6, a refractory insulation material plate 5 is disposed between the prefabricated plate 6 and the furnace cover 4;
  • the upper chamber upper cover 15 and the upper chamber 16 and the space below the prefabricated plate 6 serve as a high melting point material crystallization chamber 20;
  • the furnace shell 1 is provided with a front end vacuum suction pipe 17 with a valve (front end vacuum valve 18), front end vacuum
  • the suction pipe 17 is located in two stones Above the ink electrode 10, the front end vacuum suction pipe 17 communicates with a vacuum passage provided on the heat insulating material layer 2 and the grooved refractory wall 3, and the vacuum passage communicates with the high melting point material crystallization chamber 20;
  • the sleeve refractory wall 3 has a sleeve 21 at the rear end thereof, the sleeve 21 is in communication with the low melting point material crystallizer 23, and the bottom of the low melting point material crystallizer 23 is communicated with the liquid low melting point substance collector 30 through the discharge valve 31.
  • the liquid low-melting substance collecting device 30 is provided with a lifting bag 35; the low-melting substance crystallizer 23 is provided with a rear end vacuum suction pipe 25 with a valve (rear vacuum valve 26) and an argon gas inflation pipe 27;
  • the low-melting-point material crystallizer 23 is of a horizontal structure, and the external resistance is alternately wound with a resistance wire 29 and a cooling water pipe 28; the lower portion of the low-melting substance crystallizer 23 is an inverted tapered structure, and the bottom end of the inverted conical shape is connected to a collecting tube.
  • the collecting pipe is connected to the inside of the liquid low-melting substance collecting device 30 through a valve (discharge valve 31), and the end of the low-melting substance crystallizer 23 away from the furnace body is provided with an end cover 24 and a low-melting substance crystallizer 23;
  • the low melting point material crystallizer 23 is provided with a baffle 22, the baffle 22 is provided with a baffle through hole, and the rear end vacuum exhaust pipe 25 and the argon gas inflating pipe 27 are located between the end cover 24 and the baffle 22;
  • the top of the liquid low-melting substance collector 30 is provided with a collector upper cover 32, and the collector upper cover 32 is sealingly connected with the liquid low-melting substance collector 30; the collector upper cover 32 is fixed with the collecting tube.
  • An electric resistance wire 29 and a cooling water pipe 28 are alternately wound around the collecting pipe;
  • the method of use is:
  • the particle size of the scrap material of the aluminum cathode electrolytic cell waste cathode carbon block is ⁇ 8 cm;
  • the grid plate is placed or not placed in the crystallization chamber of the high melting point substance, and the grid plate is used as an auxiliary crystallizer to increase the crystal area;
  • Cooling water is introduced into the cooling water jacket, and the metal electrode is cooled by the cooling water system, and the low melting material crystallizer is cooled by the cooling water system;
  • the direct current is applied by two metal electrodes and the graphite electrode to electrically heat the resistance heating body; when the temperature of the resistance heating body reaches 500 ⁇ 10° C., the rear end vacuum suction pipe is closed, and the front end vacuum suction pipe is opened, and the furnace body is evacuated to Air pressure ⁇ 80Pa; continue to heat the resistance heating body, and control the temperature in the auxiliary material chamber at 1100 ⁇ 30 ° C;
  • the vacuuming and heating are stopped, and the argon gas is filled into the furnace body through the argon gas inflation tube;
  • Stop cooling the low melting point material crystallizer heat the low melting point material crystallizer to melt the condensed material on the inner wall, and enter the lifting bag in the liquid low melting point material collector;
  • the material condensed in the crystallization chamber of the low-melting substance is an alkali metal or an alkali metal alloy, and the alkali metal alloy is a sodium-potassium alloy, a sodium containing metal lithium or a sodium-potassium alloy containing lithium, and the condensed material in the crystallization chamber of the high-melting substance is a fluoride salt electrolyte. .
  • the structure of the device is shown in Fig. 5.
  • the furnace body and the liquid low-melting substance crystallizer are the same as those in the first embodiment, and the difference lies in:
  • the main chamber is used for placing the raw coke
  • the low melting point material crystallizer 23 is a vertical structure composed of a slanted section and a vertical section, and the low melting point material crystallizer 23 is composed of a slanted section and a vertical section, the sloping section is connected to the sleeve, and the lower part of the slant section is connected to a collecting tube.
  • the collecting pipe is connected to the inside of the liquid low-melting substance collecting device 30 through a valve (discharge valve 31), and the end of the vertical section is provided with an end cover 24 and a low-melting substance crystallizer 23;
  • the low melting point material crystallizer is heated to melt the condensed material (single sulfur) on the inner wall, and the temperature in the crystallizer of the low melting point substance is controlled to be higher than the melting point of elemental sulfur by 30 to 100 ° C; the desulfurization rate of petroleum coke is 92.5. %.
  • the structure of the device is the same as that in Embodiment 1, wherein the main chamber is used for placing the calcined petroleum coke;
  • the device structure is the same as Embodiment 1;
  • the waste refractory lining pieces having a particle diameter of ⁇ 8 cm are placed in the auxiliary material chamber.
  • the device structure is the same as in the embodiment 1:
  • the crushed aggregate of the waste refractory material is ground and then mixed with the aluminum ash and pressed to form the compressed aggregate placed in the auxiliary material; the waste refractory material
  • the chemical reaction formula of the lining pieces and the aluminum ash ingredients is:
  • Al is aluminum in an Al ash Al, Na 2 O and K 2 O in the waste pieces of the refractory lining Na 2 O and K 2 O.
  • the structure of the device is the same as that in Embodiment 2, wherein the main material chamber is used for placing the scrap material of the aluminum cathode electrolytic cell waste cathode carbon block;
  • the waste refractory lining pieces are ground and mixed with the Fe-Al alloy powder having a particle size of less than 100 mesh, and the pressed aggregate is formed by pressing.
  • the chemical reaction formula of the waste refractory lining fragments and the Fe-Al alloy powder is based on:
  • the device structure is the same as in the embodiment 1:
  • the silicon nitride block bonded with the electrolyte having a particle diameter of ⁇ 8 cm is placed in the auxiliary material chamber.

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Abstract

La présente invention concerne un dispositif de récupération de déchets solides de l'industrie de l'aluminium/désulfuration à haute température de coke de pétrole et un procédé d'utilisation de celui-ci. Le dispositif comprend un corps de four, un cristalliseur de matière à point de fusion bas (23) à l'extrémité arrière du corps de four, et un collecteur de matière à point de fusion bas liquide (30) au-dessous du cristalliseur de matière à point de fusion bas. Une chambre de matériau principale (14) à l'intérieur du corps de four est utilisée pour placer des blocs de carbone de cathode usagé rompu d'une cellule d'électrolyse en aluminium ou de coke de pétrole en tant que corps chauffant de résistance. Un manchon (21) est agencé à l'extrémité arrière en communication avec le cristalliseur de matière à point de fusion bas (23). La base du cristalliseur de matière à point de fusion bas (23) est en communication avec le collecteur de matière à point de fusion bas liquide (30) par l'intermédiaire d'une vanne de décharge (31). Le procédé d'utilisation comprend principalement : le placement du corps chauffant de résistance dans la chambre de matériau principale ; la mise sous vide et l'introduction d'eau de refroidissement ; le chauffage du corps chauffant de résistance par excitation ; la séparation à une température élevée par mise sous vide, arrêt de la mise sous vide et chauffage, et chargement d'argon ; et le chauffage pour faire fondre le matériau coagulé dans le cristalliseur de matière à point de fusion bas et transférer celui-ci vers le collecteur de matière à point de fusion bas liquide. Le dispositif et le procédé sont d'un fonctionnement simple, économisent des sources d'énergie et réduisent la pollution.
PCT/CN2016/085429 2016-02-25 2016-06-12 Dispositif de récupération de déchets solides de l'industrie de l'aluminium/désulfuration à haute température de coke de pétrole et procédé d'utilisation de celui-ci Ceased WO2017143697A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201620141540.6U CN205556753U (zh) 2016-02-25 2016-02-25 铝工业固体废料回收/石油焦高温脱硫装置
CN201610103505.X 2016-02-25
CN201620141540.6 2016-02-25
CN201610103505.XA CN105603216B (zh) 2016-02-25 2016-02-25 铝工业固体废料回收/石油焦高温脱硫装置及其使用方法

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CN109331975A (zh) * 2018-10-24 2019-02-15 中南大学 一种提取铝灰中金属铝的方法
CN110775955A (zh) * 2019-11-06 2020-02-11 东北大学 一种利用NaOH熔盐法处理铝电解槽阳极炭渣的方法
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CN108264351A (zh) * 2018-03-09 2018-07-10 沈阳银海再生资源科技有限公司 铝电解废阴极资源化处理方法及处理系统
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CN116022835A (zh) * 2023-02-21 2023-04-28 贵州师范大学 一种铝电解含碳危险废弃物的资源化处理方法

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