CN110066916B - Method for reducing oxide minerals by using square carbonization chamber of coke-oven plant - Google Patents
Method for reducing oxide minerals by using square carbonization chamber of coke-oven plant Download PDFInfo
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- CN110066916B CN110066916B CN201910512499.7A CN201910512499A CN110066916B CN 110066916 B CN110066916 B CN 110066916B CN 201910512499 A CN201910512499 A CN 201910512499A CN 110066916 B CN110066916 B CN 110066916B
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- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
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- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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Abstract
The invention provides a method for reducing oxide minerals by using a square carbonization chamber of a coke-oven plant, belonging to the technical field of metal reduction. The method for reducing the oxide minerals by using the metal reducing furnace with the square carbonization chamber of the coke-oven plant comprises the steps of mixing, pressing into balls by a ball press, and filling the balls into the square carbonization chamber from the top for reduction reaction, or directly crushing the block oxides into regular small blocks of mixed carbonaceous reducing agents and filling the small blocks of mixed carbonaceous reducing agents into the square carbonization chamber from the top for reduction reaction, or pressing the oxides into porous honeycomb briquettes and then pushing the honeycomb briquettes into the square carbonization chamber from the side surface by a tray for reduction reaction, so that more oxide minerals which adapt to different forms are subjected to reduction reaction to generate the elemental metal materials.
Description
Technical Field
The invention belongs to the technical field of metal reduction, and particularly relates to a method for reducing oxide minerals by using a square carbonization chamber of a coke-oven plant.
Background
The existing domestic oxidized metal reduction furnaces are common oxide mineral metal reduction furnaces such as a rotary kiln metal reduction furnace, a vertical kiln metal reduction furnace, a tunnel kiln metal reduction furnace, a rotary hearth metal reduction furnace and the like, wherein the rotary kiln operation is divided into gas-based reduction, the gas-based reduction method is high in reduction cost by using natural gas, long in reduction reaction time, simple in coal-based reduction operation, and environment-friendly and incapable of meeting the requirements by injecting a large amount of pulverized coal. The shaft furnace is charged into the furnace and is divided into oxidation lump ore and oxidation pellet ore, the cloth is charged into the furnace by adopting a layer of coal and a layer of oxidation ore to complete the reduction reaction, the operation is simple, but the problem of furnace discharge blockage caused by over-high temperature is easy to cause furnace bonding, and the reduction effect is not uniform. The tunnel is placed into the cellar by a powder ore briquetting mode, the powder ore is beaten and pressed into a block before the tunnel is placed into the cellar, and the powder ore is placed into a refractory tank and needs to be fixed and replaced, so that the cost is overhigh and the yield is low. The blast furnace adopts a fine ore mode and a reducing agent mixed pressure ball to be sent into a turntable for heating, the ore is sent into a reduction chamber for reduction reaction when the ore reaches a specific reaction temperature, and the material after the reduction reaction enters a cooling chamber for cooling to prevent the entering air from being oxidized. The square coking chamber of coking plant is characterized by that the coal is tamped into wall body, and fed into the coking chamber by means of supporting plate side, and the top portion of bulk coal is fed into the square coking chamber, and the heat transferred from two side combustion chambers can be used for heating coal material under the condition of isolating air, so that the produced gaseous product can be escaped from the lifting pipe of top end portion of the coking chamber, and the solid remained in the coking chamber can be formed into coke product, and the oven doors in front of and behind the coking chamber can be opened, and the coke can be piled up by means of coke pusher, and fed into water-cooling workshop.
At present, the domestic coke-oven plant is shut down and dismantled due to the environmental protection problem of the plant, and can only be used for smelting blast furnace iron according to the shut-down of developed countries abroad, so that the domestic steel demand can not be met, and the existing reduction cellar can not reach the supply of reduced iron (sponge iron).
Disclosure of Invention
The invention solves the technical problems of high cost, low factory quantity, poor effect and the like of reducing the metal oxide minerals by using the square metal reducing furnace of the coke-oven plant, and has the technical effects of low cost, infinite amplification of yield and high-efficiency metal reduction.
In order to achieve the purpose, the technical solution of the invention is as follows:
a method for reducing oxide minerals by using a square carbonization chamber of a coke-oven plant comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing oxide mineral powder, reducing agent and binding agent according to the proportion of 1 (0.08-0.15) to (0.01-0.O3), or mixing oxide mineral powder and binding agent according to the proportion of 1: (0.01-0.O3), and stirring by a stirrer to obtain a mixed material;
s3: shaping: pressing the mixture with the reducing agent into balls or honeycomb briquettes, and drying; or pressing the mixture without the reducing agent into balls or granulating the mixture into granular pellets by a granulator, and drying the granular pellets;
s4: reduction: the mixture which is shaped into balls in the step S3 and is provided with the reducing agent is put into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material; or the mixture shaped like honeycomb briquette in the step S3 is sent into a square carbonization chamber by a square supporting plate for reduction reaction to generate simple substance metal material; or the spherical oxide mineral without reducing agent and the granular carbon reducing agent mixed outside the granular oxidized pellet mineral are loaded into the square carbonization chamber from the top of the square carbonization chamber for reduction reaction;
s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Preferably, in step S1, the oxidized ore mineral raw material is any one of oxygen-containing ore powder or oxidized massive oxide-containing mineral, such as iron ore fine powder, vanadium-titanium-iron ore fine powder, ferromanganese fine powder, ferronickel fine powder, ferrochrome fine powder, zinciferous fine powder, and iron scale (iron scale).
Preferably, the reduction reaction in the step S4 can also be performed by feeding the honeycomb briquette-shaped mixture formed in the step S3 into a square carbonization chamber through a square supporting plate to perform reduction reaction, so as to generate an elemental metal material;
preferably, the metal oxide broken into regular small blocks in step S1 is mixed with carbonaceous reducing agent in a ratio of 1: (0.1-0.2) carrying out reduction reaction to generate an elemental metal material;
preferably, the reduction reaction temperature in the step S4 is 800-1150 ℃ and the time is 12-24H.
Preferably, the metal oxide mineral, the reducing agent and the binding agent are mixed in a ratio of 1: (0.08-0.1 preferably, the reducing agent is one or a mixture of more than one of charcoal, coal powder (particles), coke powder (particles) and semi-coke powder (particles), and the binding agent is starch.
Preferably, in the step S1, the stirring speed of the stirrer is 10-15r/min, and the stirring time is 8-20 min.
Preferably, the temperature of the reduction reaction in the step S3 is between 800-1150 ℃.
Preferably, in the step S4, the elemental metal material is hot charged at a high temperature into a corresponding container to inject nitrogen gas to cool the elemental metal in the cooling plant.
Preferably, in step S5, the separated liquid of the elemental iron substance is modified into high-grade steel and special alloy steel through electric furnace tempering, and other elemental metals that are not miscible with iron are modified into high-additive products through electric furnace tempering.
Preferably, the cooling further comprises cooling by hot pressing.
Preferably, the hot pressing method is that the oxide minerals are sent into hot pressing equipment at high temperature after the reduction reaction is completed to be hot pressed into a high-density cylinder, and oxygen in the air cannot enter the high-density cylinder to perform oxidation reaction with the elemental metal in the cooling process, so that the elemental metal materials are prevented from being oxidized again.
The invention has the beneficial effects that: the invention mixes oxide mineral, reducing agent and binding agent in proportion, presses into balls or crushes block oxide mineral into regular and uniform small blocks of mixed carbon reducing agent, and puts them into square carbonization chamber from the top of square carbonization chamber to reduce or presses into honeycomb briquette shape, and puts them into square carbonization chamber of coking plant by opening the furnace door from the side, and reduces them into products, and pushes them out of carbonization chamber, and sends them into cooling workshop to cool them into products.
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FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
In order to better understand the technical scheme of the invention, the technical scheme of the invention is described in detail in the following with the accompanying drawings and specific embodiments.
Referring to fig. 1, in the following examples, the method for reducing oxide minerals using a coke-oven plant metal reduction furnace includes the steps of:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing the oxide minerals, the reducing agent and the binding agent, and stirring by using a stirrer to obtain a mixed material; or mixing the oxide mineral powder and the binding agent, and stirring by a stirrer to obtain a mixed material;
s3: shaping: pressing the mixture material with the reducing agent obtained in the step S2 into balls or honeycomb briquettes, and drying; or pressing the mixture without the reducing agent into balls or granulating the mixture into granular pellets by a granulator, and drying the granular pellets;
s4: reduction: the mixture which is shaped into balls in the step S3 and is provided with the reducing agent is put into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material; or the mixture shaped like honeycomb briquette in the step S3 is sent into a square carbonization chamber by a square supporting plate for reduction reaction to generate simple substance metal material; or the oxide mineral crushed into regular small blocks in the step S1 is directly mixed with the carbonaceous reducing agent, and the mixed oxide mineral material is loaded from the top for reduction reaction to generate an elemental metal material: or the spherical oxide mineral without reducing agent and the granular carbon reducing agent mixed outside the granular oxidized pellet mineral are loaded into the square carbonization chamber from the top of the square carbonization chamber for reduction reaction;
s5: separation: after the oxide is reduced into simple substance metal, the oxide is pushed out of the square carbonization chamber under the high temperature state and is put into a high temperature hot charging electric furnace for dissolution and separation, so that the metal containing the simple substance iron substance is dissolved and then separated from other simple substance metals,
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
And the metal oxide minerals in the material obtained in the step S1 are oxygen-containing minerals in iron ore fine powder, vanadium-titanium-iron ore fine powder, ferromanganese ore fine powder, nickel-iron ore fine powder, ferrochrome fine powder and zinc-iron ore fine powder. Any one of oxygen-containing bulk oxide minerals.
The reducing agent is one or more of charcoal, coal powder (particles), coke powder (particles) and semi-coke powder (particles), and the binding agent is one or more of starch, resin and industrial glue.
The cooling further comprises the step of cooling by adopting a hot pressing method, the hot pressing method is that the oxide minerals are sent into hot pressing machine equipment at high temperature after the reduction reaction is completed to be hot pressed into a high-density cylinder, and oxygen in the air cannot enter the high-density cylinder to carry out oxidation reaction with the elemental metal in the cooling process, so that the elemental metal material is prevented from being oxidized again.
The first embodiment is as follows:
the method for reducing oxide minerals by using the coking plant type metal reduction furnace comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing powdery oxide minerals, a reducing agent and a binding agent according to the proportion of 1: 0.1: mixing at a ratio of 0.01, stirring with a stirrer at a stirring speed of 20r/min for 10min to obtain a mixture;
s3: shaping: pressing the mixture obtained in the step S2 into balls through a ball press machine, and drying through a dryer;
s4: reduction: putting the mixture shaped into a sphere in the step S3 into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material;
s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Example two:
the method for reducing oxide minerals by using the coking plant type metal reduction furnace comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing powdery oxide minerals and a binding agent according to the proportion of 1: mixing at a ratio of 0.01, stirring with a stirrer at a stirring speed of 20r/min for 10min to obtain a mixture;
s3: shaping: the mixture obtained in the step S2 is made into pellets through a granulator and is dried through a dryer;
s4: reduction: putting the mixture shaped into a sphere in the step S3 into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material;
s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Example three:
the method for reducing oxide minerals by using the coking plant type metal reduction furnace comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: reduction: directly mixing the oxide mineral ores crushed into regular small blocks in the step S1 with a carbonaceous reducing agent for reduction reaction to generate an elemental metal material;
s3: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s4: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s5: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Example four:
the method for reducing oxide minerals by using the coking plant type metal reduction furnace comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing powdery oxide minerals, a reducing agent and a binding agent according to the proportion of 1: 0.1: mixing according to the proportion of 0.02, stirring by a stirrer to obtain a mixed material, wherein the stirring speed of the stirrer is 15r/min, and the stirring time is 30 min;
s3: shaping: pressing the mixture obtained in the step S2 into balls through a ball press machine, and drying through a dryer;
s4: reduction: putting the mixture shaped into a sphere in the step S3 into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material;
s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Example five:
the method for reducing oxide minerals by using the coking plant type metal reduction furnace comprises the following steps:
s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher;
s2: mixing: mixing powdery oxide minerals and a binding agent according to the proportion of 1: mixing according to the proportion of 0.02, stirring by a stirrer to obtain a mixed material, wherein the stirring speed of the stirrer is 15r/min, and the stirring time is 30 min;
s3: shaping: the mixture obtained in the step S2 is made into pellets through a granulator and is dried through a dryer;
s4: reduction: putting the mixture shaped into a sphere in the step S3 into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material;
s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals;
s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material;
s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
Description of the principle:
the invention utilizes the square carbonization chamber (also called as square vacuum metal reduction furnace in the invention) of the existing coke plant to reduce metal oxide minerals into elemental metals, the oxide minerals are mixed with other auxiliary substances and pressed into balls, the balls are pressed into honeycomb coal shapes or crushed into block-shaped mixed carbonaceous reducing agent materials, the materials enter the square carbonization chamber in different entering modes, the temperature of the carbonization chamber is adjusted to be between 800 and 1150 ℃ according to the type reduction temperature of the oxide minerals, CO gas generated by the reducing agent and H2 gas react with oxygen in the oxide minerals to form CO2 gas and H2O water vapor, the CO2 gas and the H2O water vapor escape from an ascending pipe at the top end part of the carbonization chamber and are introduced into a waste gas purification treatment system to be purified into standard emissions, and the oxide minerals in the carbonization chamber are reduced into elemental metal materials and then are sent into a cooling workshop.
The present invention utilizes the temperature, equipment, time and other conditions of square carbonizing chamber in coke plant to reduce oxide mineral. In the above embodiment, the reducing agent is charcoal, coal powder (particles), coke powder (particles), semi-coke powder (particles) or other carbon substances, CO gas and H2 gas generated at a specific temperature react with oxygen in the oxide mineral at a specific temperature (above 800 ℃) to form CO2 gas and H2O steam gas, and the CO2 gas and the H2O steam gas are discharged out of the kiln, and the metal oxide mineral forms elemental metal in the process. Shortening the oxide mineral reduction time at a particular temperature saves costs. The binding agent is made of starch and polymer (including glue, industrial glue and resin), and during the use process, a proper amount of water is added, the oxide mineral powder and the adhesive are mixed, and the mixture is pressed into a honeycomb briquette shape by a ball press machine and a honeycomb briquette machine, so that the materials are prevented from being loosened under the high-temperature condition of entering a furnace.
The mixed material is pressed into balls or honeycomb briquette shapes, and oxide mineral blocks are crushed into regular small blocks of mixed carbonaceous reducing agent, and the reduction of the charged material is 40-1 each time. Compared with the prior art, the method for pressing the material into balls, drying the material and then sending the material into the turntable for reduction has the advantages of saving process, improving efficiency, reducing cost, infinitely enlarging the factory quantity and the like.
The temperature for carrying out the reduction reaction in the square carbonization chamber is preferably between 800-1150 ℃, when the indoor temperature reaches that the reducing agent generates CO gas and H2 gas, the volatilized gas takes away oxygen in oxidized minerals, so that CO2 and H2O water vapor are formed and volatilized outside the carbonization chamber, the oxidized minerals form simple substance metal products, the time and the temperature of the reduction reaction are determined according to the fineness of the oxide minerals and the composition of the material structure, and a small amount of metal materials are taken to detect whether the reaction is complete after the reaction is carried out for a certain time.
The existing coke cooling system for discharged coke of a coke plant cools coke in a mode of spraying water for a cooling workshop when the coke is pushed out in a high-temperature state, causes large-scale pollution and influences the environment. According to the invention, a nitrogen cooling mode is adopted when cooling elemental metal is produced by reduction in a coking plant type carbonization chamber, no nitrogen cooling mode is adopted in the conventional domestic large-scale production reduction metal cooling mode, nitrogen production equipment is added according to actual modification and delivery of a coking plant, and when a reduction metal material is obtained! When the reduction kiln is pushed out, the reduction kiln is directly hot-charged into a nitrogen injection container, nitrogen is injected into the container to cool the elemental metal, and the elemental metal material cannot generate oxidation reaction when cooled to a specific temperature. The hot-pressing cooling is realized by adopting a hot press with the pressure of more than 600 kilograms, when the reduced metal material is discharged from the furnace and is hot-pressed into a high-density cylinder, air cannot enter the interior of the elemental metal due to high density, and the elemental metal is prevented from being re-oxidized. The method of the invention is adopted to carry out reduction reaction of the oxide minerals, and the reduction rate of the oxide minerals reduced into elemental metal reaches more than 90 percent.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A method for reducing oxide minerals by using a square carbonization chamber of a coke-oven plant is characterized by comprising the following steps: s1: crushing: crushing the massive metal oxide into powder or regular small blocks by a crusher; s2: mixing: mixing the oxide mineral powder, the reducing agent and the binding agent, and stirring by using a stirrer to obtain a mixed material; or mixing the oxide mineral powder and the binding agent, and stirring by a stirrer to obtain a mixed material; s3: shaping: pressing the mixture with the reducing agent into balls or honeycomb briquettes, and drying; or pressing the mixture without the reducing agent into balls or granulating the mixture into granular pellets by a granulator, and drying the granular pellets; s4: reduction: the mixture which is shaped into balls in the step S3 and is provided with the reducing agent is put into a square carbonization chamber from the top of the square carbonization chamber for reduction reaction to generate a simple substance metal material; or the mixture shaped like honeycomb briquette in the step S3 is sent into a square carbonization chamber by a square supporting plate for reduction reaction to generate simple substance metal material; or the spherical oxide mineral without reducing agent and the granular carbon reducing agent mixed outside the granular oxidized pellet mineral are loaded into the square carbonization chamber from the top of the square carbonization chamber for reduction reaction; or directly carrying out reduction reaction on the metal oxide which is crushed into regular small blocks in the step S1 and a carbonaceous reducing agent to generate an elemental metal material; s5: separation: after the oxide is reduced into elemental metal, the oxide is pushed out of the square carbonization chamber at a high temperature and is put into a high-temperature hot charging electric furnace for dissolution and separation, so that the metal containing the elemental iron substance is dissolved and then separated from other elemental metals; s6: and (3) cooling: after the reduction reaction is finished, sending the elementary metal material into a cooling workshop for cooling, cooling to a temperature lower than 100 ℃ by a nitrogen injection method, and isolating air from entering the inside of the elementary metal material to prevent the reoxidation of the elementary metal material; s7: grinding and sorting: and crushing and grinding the cooled elemental metal materials, and separating by using a magnetic separator, wherein iron materials with magnetism are sucked out, and other metal materials without magnetism are separated.
2. The method for reducing oxide minerals by using a square coking chamber of a coke-oven plant according to claim 1, characterized in that: in the step S2, the metal oxide mineral, the reducing agent and the binding agent are mixed according to the proportion of 1 (0.08-0.15) to 0.01-0.03).
3. The method for reducing oxide minerals by using a square coking chamber of a coke-oven plant according to claim 1, characterized in that: in the step S2, the oxide mineral and the binder are mixed in a ratio of 1: (0.01-0.03).
4. The method for reducing oxide minerals by using a square coking chamber of a coke-oven plant according to claim 1, characterized in that: in the step S4, the ratio of the small bulk metal oxide to the carbonaceous reducing agent is 1: (0.1-0.2) in the ratio.
5. The method for reducing oxide minerals by using a square coking chamber of a coke-oven plant according to claim 1, characterized in that: in the step S1, the oxidized ore mineral raw material is any one of an oxygen-containing mineral powder or an oxidized massive oxide-containing mineral in iron ore fine powder, vanadium-titanium-iron ore fine powder, ferromanganese ore fine powder, nickel-iron ore fine powder, ferrochrome fine powder, zinc-iron ore fine powder and iron scale oxide mineral powder.
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| JP2008196027A (en) * | 2007-02-15 | 2008-08-28 | Jfe Steel Kk | Method for manufacturing sintered ore |
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| CN109929994A (en) | 2019-06-25 |
| WO2020216320A1 (en) | 2020-10-29 |
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