CN111359544A - Iron oxide reduction reaction tank and preparation method thereof - Google Patents
Iron oxide reduction reaction tank and preparation method thereof Download PDFInfo
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- CN111359544A CN111359544A CN202010253453.0A CN202010253453A CN111359544A CN 111359544 A CN111359544 A CN 111359544A CN 202010253453 A CN202010253453 A CN 202010253453A CN 111359544 A CN111359544 A CN 111359544A
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- silicon carbide
- tank body
- carbide tank
- iron oxide
- cylindrical die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
- B01J8/0446—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
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Abstract
The invention discloses an iron oxide reduction reaction tank which comprises a silicon carbide tank body column, wherein the silicon carbide tank body column comprises a silicon carbide tank body, a cylindrical die is arranged in the silicon carbide tank body column, and a gap is formed between the silicon carbide tank body column and the cylindrical die; a method for preparing iron oxide by reduction comprises the following steps: preparing raw materials; step two: preparing a reducing agent; step three: (1) the silicon carbide tank body column 42 is stacked on the surface of the vehicle; (2) putting a cylindrical die into the center of the silicon carbide tank body column; (3) filling the reducing agent prepared in the step two into a gap between the cylindrical die and the silicon carbide tank body column; (4) filling the raw materials prepared in the step one into the cylindrical mold, and sealing the opening of the silicon carbide tank; (5) reducing in a tunnel kiln; (6) and discharging the product out of the kiln, cooling and processing. The invention has the advantages that: the yield is increased, the cost is reduced, the product quality index is improved, and the product meets the high-end requirement of the reduced iron powder market; the defects of the existing reduction process are overcome.
Description
Technical Field
The invention relates to the technical field of producing reduced iron powder by a solid carbon reduced iron oxide method, in particular to an iron oxide reduction reaction tank and a preparation method thereof.
Background
The existing iron oxide reduction mode:
① the tunnel kiln is used as a main facility for reduction, which has the disadvantages that the length of the kiln body must reach enough length to meet the reduction requirement, the construction and daily maintenance costs of the kiln body are increased, and the energy consumption in the reduction process is large;
② the kiln car adapting to the section of the tunnel kiln and the reducing material placed in the kiln car are reduced in the tunnel kiln according to a certain entering time, the disadvantage is that the capacity utilization rate of the silicon carbide tank of the reaction container and the optimum size of the tank body adapting to the silicon carbide tank can not be considered, thereby leading to low ferric oxide reduction capacity and overlarge consumption of the reducing agent, if the yield is increased intentionally, the product quality index is greatly reduced, and the product can not meet the high-end requirement of the market.
The existing iron oxide reduction mode has the following problems: the productivity is low; the energy consumption is high; the reduction cost is high; the product quality index is low.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the technical defects and providing the iron oxide reduction reaction tank and the preparation method thereof, so that the yield is increased, the cost is reduced, the product quality index is improved, and the product meets the high-end requirement of the reduced iron powder market; the defects of the existing reduction process are overcome.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides an iron oxide reduction retort, includes silicon carbide jar body post, silicon carbide jar body post contains the silicon carbide jar body of being no less than one and arranging from top to bottom, be equipped with the drum mould in the silicon carbide jar body post, be formed with the clearance between silicon carbide jar body post and the drum mould.
Preferably, the silicon carbide tank column consists of 5 silicon carbide tanks, the total height of the silicon carbide tank column is 1760mm, and the height of the cylindrical die is 1800mm and the diameter of the cylindrical die is 260 mm.
A method for preparing iron oxide by reduction comprises the following steps:
the method comprises the following steps: preparing raw materials: uniformly mixing iron oxide powder and coal in proportion by a stirrer;
step two: preparing a reducing agent: evenly mixing coke powder with the granularity of less than 3mm, anthracite and calcium carbonate in a mixer according to a proportion;
step three: the process flow comprises the following steps: (1) the silicon carbide tank body column 42 is stacked on the surface of the vehicle;
(2) putting a cylindrical die into the center of the silicon carbide tank body column;
(3) filling the reducing agent prepared in the step two into a gap between the cylindrical die and the silicon carbide tank body column;
(4) filling the raw materials prepared in the step one into the cylindrical mold, and sealing the opening of the silicon carbide tank;
(5) reducing in a tunnel kiln;
(6) and discharging the product out of the kiln, cooling and processing.
Preferably, the water content of the iron oxide powder is less than 2%, and the particle size of the coal mixed with the iron oxide powder is not more than 8 mm.
Preferably, the temperature difference of the reduction temperature 1145 ℃ in the tunnel kiln is not more than 7 ℃, and the reduction time of one period is 70 hours.
Preferably, the mouth of the pot is sealed with a wet mixture of fine refractory clay and glass water after uniform stirring.
Preferably, the filled kiln car enters a tunnel kiln for reduction, a cyclic car entering mode is adopted in production, and the time interval of entering the kiln car is 90 minutes.
The principle is as follows: the size of the silicon carbide tank body is scientific and reasonable, so that the volume utilization rate of the silicon carbide tank body is maximized, and the placement density of the silicon carbide tank body on the corresponding kiln car surface is maximized; the diffusion path of high-concentration carbon monoxide gas is shortened in the reduction process, so that the resistance of the gas penetrating through a material layer is reduced, the reduction reaction speed is accelerated, and the reduction time is shortened.
The main chemical reaction involved in the reduction process is the gasification reaction of ① carbon, C + CO2 ═ 2CO
② reduction reaction of gasified carbon and iron oxide powder
3Fe2O3+CO＝2Fe3O4+CO2
Fe3O4+CO＝3FeO+CO2
FeO+CO＝Fe+CO2
Compared with the prior art, the invention has the advantages that: the optimal fitting of the size parameters of the silicon carbide tank body and the mould enables the volume utilization rate of the tunnel kiln and the silicon carbide tank body to be maximum; the filling amount of the reducing agent and the ferric oxide powder is scientific and reasonable. Compared with the prior reduction mode, the filling rate of the iron oxide powder is improved, and the using amount of the reducing agent is reduced.
The gas diffusion path of the carbon monoxide is shortened in the reduction process, so that the resistance of the gas penetrating through the material layer is reduced, the reduction reaction speed is accelerated, and the internal temperature of the reduced iron oxide powder is greatly increased compared with the existing reduction mode.
So that the reduction yield of the iron oxide is greatly improved, the comprehensive cost of heat energy, carbon consumption of a reducing agent and the like is reduced, and the quality index of the product is improved.
Drawings
FIG. 1 is a schematic structural diagram of a silicon carbide tank for an iron oxide reduction reaction tank and a method for manufacturing the same according to the present invention.
FIG. 2 is a schematic diagram of a column structure of a silicon carbide tank for iron oxide reduction reaction and a preparation method thereof.
FIG. 3 is a sectional view of a kiln car entering a tunnel kiln for iron oxide reduction reaction tank and a method for manufacturing the same according to the present invention.
FIG. 4 is a plan view of a stacked kiln car surface silicon carbide tank body column of the iron oxide reduction reaction tank and the preparation method thereof.
As shown in the figure: 1. the silicon carbide tank body 2, the cylindrical die 3, the gap 4 and the silicon carbide tank body.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides an iron oxide reduction retort, includes silicon carbide jar body post, silicon carbide jar body post contains the silicon carbide jar body of being no less than one and arranging from top to bottom, be equipped with the drum mould in the silicon carbide jar body post, be formed with the clearance between silicon carbide jar body post and the drum mould.
Preferably, the silicon carbide tank column consists of 5 silicon carbide tanks, the total height of the silicon carbide tank column is 1760mm, and the height of the cylindrical die is 1800mm and the diameter of the cylindrical die is 260 mm.
A method for preparing iron oxide by reduction comprises the following steps:
the method comprises the following steps: preparing raw materials: uniformly mixing iron oxide powder and coal in proportion by a stirrer;
step two: preparing a reducing agent: evenly mixing coke powder with the granularity of less than 3mm, anthracite and calcium carbonate in a mixer according to a proportion;
step three: the process flow comprises the following steps: (1) the silicon carbide tank body column 42 is stacked on the surface of the vehicle;
(2) putting a cylindrical die into the center of the silicon carbide tank body column;
(3) filling the reducing agent prepared in the step two into a gap between the cylindrical die and the silicon carbide tank body column;
(4) filling the raw materials prepared in the step one into the cylindrical mold, and sealing the opening of the silicon carbide tank;
(5) reducing in a tunnel kiln;
(6) and discharging the product out of the kiln, cooling and processing.
The water content of the ferric oxide powder is less than 2 percent, and the granularity of the coal mixed with the ferric oxide powder is not more than 8 mm.
The temperature difference of 1145 ℃ in the tunnel kiln is not more than 7 ℃, and the reduction time of one period is 70 hours.
The mouth of the tank body is sealed by a wet mixture of fine refractory clay and glass water after uniform stirring.
And (4) the filled kiln car enters a tunnel kiln for reduction, a cyclic car entering mode is adopted in production, and the time interval of entering the kiln car is 90 minutes.
The process of the invention is compared with the prior art as follows:
the present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. An iron oxide reduction reaction tank is characterized in that: including carborundum jar body post (1), carborundum jar body post (1) contains the carborundum jar body (4) that is no less than one and arrange from top to bottom, be equipped with cylinder mould (2) in carborundum jar body post (1), be formed with between carborundum jar body post (1) and cylinder mould (2) gapped (3).
2. The method of claim 1, wherein: the silicon carbide tank body column (1) is composed of 5 silicon carbide tank bodies (4), the total height of the silicon carbide tank body column (1) is 1760mm, and the height of the cylindrical die (2) is 1800mm, and the diameter of the cylindrical die is 260 mm.
3. The method for preparing the iron oxide through reduction is characterized by comprising the following steps of:
the method comprises the following steps: preparing raw materials: uniformly mixing iron oxide powder and coal in proportion by a stirrer;
step two: preparing a reducing agent: evenly mixing coke powder with the granularity of less than 3mm, anthracite and calcium carbonate in a mixer according to a proportion;
step three: the process flow comprises the following steps: (1) the silicon carbide tank body column (1)42 columns are stacked on the surface of the vehicle;
(2) putting a cylindrical die (2) into the center of the silicon carbide tank column (1);
(3) filling the reducing agent prepared in the step two into a gap (3) between the cylindrical die (2) and the silicon carbide tank column (1);
(4) filling the raw materials prepared in the step one into the cylindrical die (2), and sealing the opening of the silicon carbide tank;
(5) reducing in a tunnel kiln;
(6) and discharging the product out of the kiln, cooling and processing.
4. The method of claim 1, wherein: the water content of the ferric oxide powder is less than 2 percent, and the granularity of the coal mixed with the ferric oxide powder is not more than 8 mm.
5. The method of claim 1, wherein: the temperature difference of 1145 ℃ in the tunnel kiln is not more than 7 ℃, and the reduction time of one period is 70 hours.
6. The method of claim 1, wherein: the mouth of the tank body is sealed by a wet mixture of fine refractory clay and glass water after uniform stirring.
7. The method of claim 1, wherein: and (4) the filled kiln car enters a tunnel kiln for reduction, a cyclic car entering mode is adopted in production, and the time interval of entering the kiln car is 90 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010253453.0A CN111359544A (en) | 2020-04-02 | 2020-04-02 | Iron oxide reduction reaction tank and preparation method thereof |
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| CN202010253453.0A CN111359544A (en) | 2020-04-02 | 2020-04-02 | Iron oxide reduction reaction tank and preparation method thereof |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001342509A (en) * | 2000-06-02 | 2001-12-14 | Kobe Steel Ltd | Method and apparatus for producing metallic iron |
| CN201476572U (en) * | 2009-04-20 | 2010-05-19 | 唐山奥特斯科技有限公司 | Device for loading material for producing sponge iron |
| CN201581103U (en) * | 2009-11-18 | 2010-09-15 | 唐山奥特斯科技有限公司 | Energy-saving mold used for sponge iron loading materials |
| CN201581104U (en) * | 2009-11-18 | 2010-09-15 | 唐山奥特斯科技有限公司 | Integrated charging set for reduced iron |
| CN105018667A (en) * | 2015-07-13 | 2015-11-04 | 石家庄富邦冶金科技有限公司 | Novel tunnel kiln reduced iron canning method |
| CN106987672A (en) * | 2017-04-17 | 2017-07-28 | 朝阳金河粉末冶金材料有限公司 | The method that low-grade vanadium titano-magnetite powder produces natural micro alloy reduced iron powder |
| CN107244694A (en) * | 2017-05-08 | 2017-10-13 | 朝阳金河粉末冶金材料有限公司 | The method that acid-dissolved titanium slag is produced using low-grade ilmenite |
| CN108342535A (en) * | 2018-02-08 | 2018-07-31 | 唐竹胜 | A kind of method of tunnel oven and its high-yield and high-efficiency fast deep reduced iron |
| CN108588408A (en) * | 2018-06-15 | 2018-09-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of device and technique of iron oxide red tunnel oven production metallized pellet |
| CN208586340U (en) * | 2018-06-15 | 2019-03-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of charge can producing metallized pellet |
-
2020
- 2020-04-02 CN CN202010253453.0A patent/CN111359544A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001342509A (en) * | 2000-06-02 | 2001-12-14 | Kobe Steel Ltd | Method and apparatus for producing metallic iron |
| CN201476572U (en) * | 2009-04-20 | 2010-05-19 | 唐山奥特斯科技有限公司 | Device for loading material for producing sponge iron |
| CN201581103U (en) * | 2009-11-18 | 2010-09-15 | 唐山奥特斯科技有限公司 | Energy-saving mold used for sponge iron loading materials |
| CN201581104U (en) * | 2009-11-18 | 2010-09-15 | 唐山奥特斯科技有限公司 | Integrated charging set for reduced iron |
| CN105018667A (en) * | 2015-07-13 | 2015-11-04 | 石家庄富邦冶金科技有限公司 | Novel tunnel kiln reduced iron canning method |
| CN106987672A (en) * | 2017-04-17 | 2017-07-28 | 朝阳金河粉末冶金材料有限公司 | The method that low-grade vanadium titano-magnetite powder produces natural micro alloy reduced iron powder |
| CN107244694A (en) * | 2017-05-08 | 2017-10-13 | 朝阳金河粉末冶金材料有限公司 | The method that acid-dissolved titanium slag is produced using low-grade ilmenite |
| CN108342535A (en) * | 2018-02-08 | 2018-07-31 | 唐竹胜 | A kind of method of tunnel oven and its high-yield and high-efficiency fast deep reduced iron |
| CN108588408A (en) * | 2018-06-15 | 2018-09-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of device and technique of iron oxide red tunnel oven production metallized pellet |
| CN208586340U (en) * | 2018-06-15 | 2019-03-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of charge can producing metallized pellet |
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Application publication date: 20200703 |