CN212720899U - Furnace body structure of ore-smelting electric furnace - Google Patents
Furnace body structure of ore-smelting electric furnace Download PDFInfo
- Publication number
- CN212720899U CN212720899U CN202021431305.5U CN202021431305U CN212720899U CN 212720899 U CN212720899 U CN 212720899U CN 202021431305 U CN202021431305 U CN 202021431305U CN 212720899 U CN212720899 U CN 212720899U
- Authority
- CN
- China
- Prior art keywords
- furnace body
- ore
- layer
- cooling
- electric furnace
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model discloses a furnace body structure of an ore-smelting electric furnace, which comprises a furnace body and a furnace cover, wherein the side wall and the bottom of the furnace body are respectively provided with a cooling device; the cooling device on the side wall of the furnace body is arranged outside the steel shell of the furnace body, and the installation area of the cooling device corresponds to the smelting area of the hearth in the furnace body; the cooling device at the bottom of the furnace body is a cooling pipeline arranged in the high heat conduction pouring material layer. The utility model discloses set up cooling device respectively in the lateral wall and the bottom of ore-smelting electric furnace body, can carry out effectual cooling to ore-smelting electric furnace inside lining refractory material, ensure that 1150 ℃ molten iron solidifies the isotherm and keeps within next-door neighbour's refractory material working face, effectively slow down liquid slag iron to refractory material's erosion damage effect to form one deck slag iron protective layer on the surface of refractory material working face when smelting. The lining on the side wall and the lining on the bottom of the electric furnace body are reasonably adjusted, so that the ore-smelting electric furnace body can run safely, efficiently and long in service life.
Description
Technical Field
The utility model relates to an ore-smelting electric furnace structure, in particular to an ore-smelting electric furnace body structure for smelting ferronickel and ferroalloy.
Background
The ore-smelting electric furnace is an important equipment for smelting iron alloy, and it uses the arc heat produced by three inserted high-power electrodes to smelt the metal mineral raw material fed into the furnace, so that the impurities and metal in the mineral can be separated in the liquid state, then the slag can be discharged in the tapping process so as to obtain the finished metal. The refractory material of the lining of the mine thermoelectric furnace can be subjected to multiple damages such as electric arc heat erosion, high-temperature liquid metal infiltration, chemical erosion of complex slag components and the like in the smelting process. The service life of refractory materials of a plurality of ore-smelting electric furnace linings in the industry is 12-18 months at present, and the one-time overhaul of the ore-smelting electric furnace linings requires capital investment of thousands of RMB and production stop of 1-2 months, so that the production efficiency and economic benefit of the ore-smelting electric furnaces are greatly influenced, and a large amount of resource investment and the emission of thousands of tons of industrial solid waste garbage are caused in each overhaul. Therefore, how to effectively prolong the service life of the ore-smelting electric furnace is a long-term research direction for technicians in the field.
The existing mine thermal electric furnace adopts a common furnace shell, refractory materials in the furnace are built by magnesia bricks, magnesia-chrome bricks, carbon bricks and high-alumina bricks, high-temperature corrosion, molten iron infiltration and chemical erosion in the furnace are resisted only by the high-temperature performance of the refractory materials, the service life of the furnace is about one year generally, and vulnerable parts of the furnace need to be maintained in the period. And the furnace is required to be operated in the state that the furnace lining is thinned and the furnace shell is at high temperature in the later period of use, so that the operation is very dangerous.
In order to prolong the service life of the furnace body of the ore-smelting electric furnace, the currently adopted furnace protection methods comprise the following steps:
1. stacking and protecting the furnace: the diameter of the ore-smelting electric furnace is enlarged, the arc radius of the electrode is reduced, minerals close to a furnace lining are far away from the arc and cannot be melted and accumulated, the furnace lining made of refractory materials is protected by the accumulation of mineral raw materials, and the service life of the furnace lining can reach 2-3 years generally. However, the furnace protection mode can ensure that the utilization rate of the furnace is very low and the power consumption is very high, and because the material is blocked, the furnace cannot be effectively monitored, and when the ablation imbalance is caused abnormally in the furnace, the furnace wall is easily burnt through.
2. Local cooling and slag component adjustment: the method is widely used at present, and generally carries out circulating water cooling on the furnace cover, the tap hole and the slag hole of the ore-smelting electric furnace, so that the service life of refractory materials at key positions can be effectively prolonged; and through the adjustment of the components of the slag in the furnace, the erosion to the refractory material of the slag line is reduced, and the service life of the furnace lining of the corresponding part is prolonged. The use of the comprehensive measures can lead the service life of the furnace to reach 3-4, but the requirements on the technical types of furnace operation and slag component adjustment are higher.
3. Cooling the furnace body: at present, cooling methods for the ore-smelting electric furnace comprise cooling wall cooling and water spraying cooling, the investment of cooling equipment of the cooling wall is high, and the investment of the water spraying cooling is relatively low. However, the service life of the furnace lining is not obviously prolonged by the cooling modes (the longest service life of the furnace body is not more than 5 years).
Researches show that if the working temperature of the refractory material of the lining working layer of the ore-smelting electric furnace can be effectively reduced, the service life of the hearth can be prolonged, and the running safety of the furnace can be improved.
Disclosure of Invention
The utility model aims to provide a novel ore-smelting electric furnace body structure to the short defect of present ore-smelting electric furnace body life, this furnace body structure can effectively prolong the life of ore-smelting electric furnace.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
the furnace body structure of the ore-smelting electric furnace comprises a furnace body and a furnace cover, wherein the side wall and the bottom of the furnace body are respectively provided with a cooling device; wherein
The cooling device on the side wall of the furnace body is arranged outside the steel shell of the furnace body, and the mounting area of the cooling device corresponds to the smelting area of a hearth in the furnace body;
the cooling device at the bottom of the furnace body is a cooling pipeline arranged in the high-heat-conductivity castable layer; in order to prevent the cooling pipeline from permeating after water leakage, an isolation steel plate is paved on the high heat conduction castable layer at the bottom of the furnace body.
The cooling device on the side wall of the furnace body is a cooling wall, a cooling plate, a cooling pipe or a blowing device.
A temperature thermocouple is arranged on the inner side of the furnace body steel shell; and a temperature thermocouple is distributed on the upper surface of the isolation steel plate.
And a high-thermal-conductivity carbon brick layer and a carbon-containing refractory brick layer are sequentially laid on the high-thermal-conductivity castable layer at the bottom of the furnace body, and a clay brick or high-aluminum brick layer is laid on the carbon-containing refractory brick layer.
And a high-thermal-conductivity carbon brick layer is laid on the high-thermal-conductivity castable layer at the bottom of the furnace body, a high-thermal-conductivity castable layer is poured on the high-thermal-conductivity carbon brick layer, and a clay brick or high-aluminum brick layer is laid on the high-thermal-conductivity castable layer.
And a carbon-containing refractory brick layer is built on the inner side of the steel shell of the side wall of the furnace body, and a clay brick or high-alumina brick layer is built on the carbon-containing refractory brick layer.
The steel shell inner side of the furnace body side wall is sequentially provided with a high-heat-conductivity carbon brick layer and a high-heat-conductivity castable layer, and a high-strength spray coating layer is sprayed on the carbon-containing refractory brick layer.
And a water cooling system is arranged on the furnace cover.
The utility model has the advantages of set up cooling device respectively in the lateral wall and the bottom of ore-smelting electric stove furnace body, can carry out effectual cooling to ore-smelting electric stove inside lining refractory material, ensure that 1150 ℃ molten iron solidifies the isotherm and keeps within next-door neighbour's refractory material working face, effectively slowed down liquid slag iron to refractory material's erosion damage effect to can form one deck slag iron protective layer on the surface of refractory material working face when smelting. Meanwhile, the lining on the side wall and the lining on the bottom of the electric furnace body are reasonably adjusted, so that the ore-smelting electric furnace body can run safely, efficiently and long in service life, and the one-time service life of the existing ore-smelting electric furnace lining can be prolonged to 5 years to 10 years.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is another schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1 and 2, the structure of the furnace body of the ore-smelting electric furnace comprises a furnace body and a furnace cover, and in order to prolong the service life of the ore-smelting electric furnace, cooling devices are respectively arranged on the side wall and the bottom of the furnace body; wherein
The furnace body side wall cooling device 1 is arranged outside a furnace body steel shell, the installation area of the furnace body side wall cooling device is consistent with the smelting area of a furnace hearth in the furnace body, and even the furnace body side wall cooling device can be completely installed outside a furnace shell; preferably, the furnace sidewall cooling device 1 may be a cooling wall, a cooling plate, a cooling pipe, a blowing device, or the like made of metal or ceramic, and the cooling medium may be water, nitrogen, compressed air, or the like.
The cooling device at the bottom of the furnace body can adopt a cooling pipeline 2, the cooling pipeline 2 can adopt a seamless steel pipe, and a high-heat-conductivity castable layer 3 is adopted to level the gap between the cooling pipelines; and (3) paving an isolation steel plate 4 on the leveling surface to isolate the permeation of water leakage of the lower cooling pipeline 2 (if the cooling medium adopts nitrogen or compressed air, the isolation steel plate 4 is not paved).
In order to flexibly control the temperature of the cooling devices arranged at each position of the furnace wall and the furnace bottom, the cooling device 1 on the side wall of the furnace body can control water flow in different regions (for example, valves are respectively arranged at the water inlet and the water outlet of each or a group of cooling walls, cooling plates and cooling pipes, and can be independently controlled, and meanwhile, a temperature measuring device is arranged at the water inlet and the water outlet to ensure the cooling effect of the cooling device); the cooling pipeline 2 at the bottom of the furnace also controls water flow independently and is provided with a water inlet and outlet temperature measuring device. Temperature thermocouples 5 are uniformly distributed on the inner side of the furnace wall steel shell and the furnace bottom isolation steel plate 4, and the temperature of the furnace body can be detected at any time.
Under furnace body lateral wall and bottom installation cooling device's prerequisite, this application has also made the improvement to the furnace body inside lining, specifically:
1. the bottom lining (working layer) of the ore-smelting electric furnace adopts two masonry schemes
The first solution is shown in fig. 1: firstly, building 2-3 (2 shown in the figure) 230-400 mm high-heat-conductivity carbon brick layers 6.1 on a furnace bottom leveling layer (high-heat-conductivity castable layer 3) or an isolation steel plate 4 (the heat conductivity coefficient is 15.0-17.0 w/(m.k)), and building 2-3 (2 shown in the figure) anti-floating structural brick types on the high-heat-conductivity carbon brick layers 6 to build 500-900 mm carbon-containing refractory brick layers 7.1 (the heat conductivity coefficient is 12.0-14.0 w/(m.k), the compressive strength is 50.0-60.0 MPa and the apparent porosity is 10.8-12.0%);
the second scheme is shown in figure 2: a high heat-conducting castable layer 7.2 [ heat conductivity coefficient 10.0-12.0 w/(m.k) ] with thickness of 500-900 mm, compressive strength 50.0-60.0 MPa, and bulk density 2.80-2.85 (g/cm) is poured on the built high heat-conducting carbon brick layer 6.13）］；
2. The lining (working layer) of the wall of the ore-smelting electric furnace also adopts two masonry schemes
The first solution is shown in fig. 1: building 3-4 rings of carbon-containing refractory brick layers with the width of 230-345 mm in a steel shell on the side wall of the furnace body, wherein the carbon-containing refractory brick layers are 8.1 [ the heat conductivity coefficient is 12.0-14.0 w/(m.k), the compressive strength is 50.0-60.0 MPa, and the apparent porosity is 10.8-12.0% ];
the second scheme is shown in figure 2: firstly, 2 rings of 8.2-150 mm wide carbon-containing refractory brick layers are built in a steel shell on the side wall of a furnace body in a staggered joint mode, then a high-thermal-conductivity castable material 8.3 (the thermal conductivity coefficient is 10.0-12.0 w/(m.k), the compressive strength is 50.0-60.0 MPa, and the volume density is 2.80-2.85 g/cm) with the thickness of 600-900 mm is integrally cast by a supporting die3］；
After the furnace body lining is built by the method, the lining is provided with the protective layer, and the purpose is that the refractory material of the protective layer can avoid oxidation and material impact during the furnace baking period and the initial stage of furnace opening. A clay brick layer 9 (also can be a high-alumina brick) with the thickness of 65mm or 114mm can be laid on the bottom lining working layer, a clay brick layer 10 (also can be a high-alumina brick) with the thickness of 65mm is laid on the wall lining working layer in an adherence manner, or high-strength spraying material with the thickness of 30-50 mm is sprayed.
In order to ensure the cooling effect, a water cooling system is also arranged on the furnace cover, an independently controlled full water cooling system can be adopted, temperature measuring devices are arranged at the water inlet and outlet, and the inner lining of the furnace cover adopts casting materials or high-strength spray coating materials as the inner lining of a refractory material.
Meanwhile, a copper cooling jacket or a cooling plate can be additionally arranged at important parts such as a slag hole, an iron tap hole and the like of the ore-smelting electric furnace for enhanced cooling, the flow rate of cooling water flow or air flow is independently controlled, and a temperature measuring device is arranged at an inlet and an outlet of a pipeline.
Through the design, the cooling circulation system is adopted to properly cool the lining refractory material of the ore-smelting electric furnace, the 1150 ℃ molten iron solidification isothermal line is ensured to be kept in the close vicinity of the refractory material working surface, the corrosion damage effect of liquid slag iron on the refractory material is effectively slowed down, and a slag iron protective layer is formed on the surface of the refractory material working surface in the smelting process. The scheme of the utility model can be optimized according to factors such as restriction of smelting ore species and original design structure in practice, and can be wholly used and also can be partially used. Through optimization, the service life of the ore-smelting electric furnace is expected to be prolonged from more than 5 years to more than 10 years.
Claims (10)
1. The utility model provides an ore-smelting electric furnace body structure, includes furnace body and bell, its characterized in that:
the side wall and the bottom of the furnace body are respectively provided with a cooling device; wherein
The cooling device on the side wall of the furnace body is arranged outside the steel shell of the furnace body, and the mounting area of the cooling device corresponds to the smelting area of a hearth in the furnace body;
the cooling device at the bottom of the furnace body is a cooling pipeline arranged in the high heat conduction pouring material layer.
2. The ore-smelting electric furnace body structure according to claim 1, wherein: the cooling device on the side wall of the furnace body is a cooling wall, a cooling plate, a cooling pipe or a blowing device.
3. The ore-smelting electric furnace body structure according to claim 1, wherein: and an isolation steel plate is paved on the high-heat-conductivity castable layer at the bottom of the furnace body.
4. The ore-smelting electric furnace body structure according to claim 1, wherein: and a temperature thermocouple is arranged on the inner side of the furnace body steel shell.
5. The ore-smelting electric furnace body structure according to claim 3, wherein: and a temperature thermocouple is distributed on the upper surface of the isolation steel plate.
6. The ore-smelting electric furnace body structure according to claim 1, wherein: and a high-thermal-conductivity carbon brick layer and a carbon-containing refractory brick layer are sequentially laid on the high-thermal-conductivity castable layer at the bottom of the furnace body, and a clay brick or high-aluminum brick layer is laid on the carbon-containing refractory brick layer.
7. The ore-smelting electric furnace body structure according to claim 1, wherein: and a high-thermal-conductivity carbon brick layer is laid on the high-thermal-conductivity castable layer at the bottom of the furnace body, a high-thermal-conductivity castable layer is poured on the high-thermal-conductivity carbon brick layer, and a clay brick or high-aluminum brick layer is laid on the high-thermal-conductivity castable layer.
8. The ore-smelting electric furnace body structure according to claim 1, wherein: and a carbon-containing refractory brick layer is built on the inner side of the steel shell of the side wall of the furnace body, and a clay brick or high-alumina brick layer is built on the carbon-containing refractory brick layer.
9. The ore-smelting electric furnace body structure according to claim 1, wherein: the furnace body is characterized in that a carbon-containing refractory brick layer and a high-heat-conductivity castable layer are sequentially arranged on the inner side of the steel shell of the side wall of the furnace body, and a high-strength spray coating layer is sprayed on the high-heat-conductivity castable layer.
10. The ore-smelting electric furnace body structure according to claim 1, wherein: and a water cooling system is arranged on the furnace cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021431305.5U CN212720899U (en) | 2020-07-20 | 2020-07-20 | Furnace body structure of ore-smelting electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021431305.5U CN212720899U (en) | 2020-07-20 | 2020-07-20 | Furnace body structure of ore-smelting electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212720899U true CN212720899U (en) | 2021-03-16 |
Family
ID=74907014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021431305.5U Active CN212720899U (en) | 2020-07-20 | 2020-07-20 | Furnace body structure of ore-smelting electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212720899U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018054A (en) * | 2021-10-28 | 2022-02-08 | 无锡市辉丰机电设备有限公司 | Water-cooled furnace bottom electrode and building method |
| CN117968387A (en) * | 2024-03-29 | 2024-05-03 | 金冶(内蒙古)工程技术有限公司 | Submerged arc furnace and process for producing low-nickel-containing pig iron by smelting low-nickel high-iron laterite ore |
-
2020
- 2020-07-20 CN CN202021431305.5U patent/CN212720899U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018054A (en) * | 2021-10-28 | 2022-02-08 | 无锡市辉丰机电设备有限公司 | Water-cooled furnace bottom electrode and building method |
| CN117968387A (en) * | 2024-03-29 | 2024-05-03 | 金冶(内蒙古)工程技术有限公司 | Submerged arc furnace and process for producing low-nickel-containing pig iron by smelting low-nickel high-iron laterite ore |
| CN117968387B (en) * | 2024-03-29 | 2024-05-31 | 金冶(内蒙古)工程技术有限公司 | Submerged arc furnace and process for producing low-nickel-containing pig iron by smelting low-nickel high-iron laterite ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212720899U (en) | Furnace body structure of ore-smelting electric furnace | |
| WO2021189680A1 (en) | Water-cooled iron storage type molten iron trough structure and method for reducing temperature of side wall of molten iron trough | |
| CA2278513C (en) | Refractory wall, metallurgical vessel comprising such a refractory wall and method in which such a refractory wall is applied | |
| CN111778373A (en) | Maintenance method of blast furnace main channel | |
| CN101319257B (en) | Bottom blowing ventilating structure of combined-blowing revolving furnace | |
| CN104313221B (en) | A kind of water-cooling type iron storing type iron runner and cooling means | |
| CN201852465U (en) | Structure of iron notch of water-cooled ore heating furnace | |
| CN206887148U (en) | A kind of essemer converter furnace bottom | |
| CN203700396U (en) | Chromium-iron alloy smelting blast furnace crucible | |
| CN209740966U (en) | Hot-melting slag mineral wool electric furnace with condensing furnace lining | |
| CN101900491A (en) | Cooling water jacket, preparation method thereof and high temperature smelting equipment with same | |
| CN109439825B (en) | Method for prolonging service life of blast furnace main channel | |
| CN205300256U (en) | Metallurgical stove brickwork structure | |
| CN103157785A (en) | Construction method of ladle lining | |
| CN111850379A (en) | Furnace body structure of ore-smelting electric furnace | |
| Geyer et al. | Blast furnace tapping practice at arcelor mittal South Africa, vanderbijlpark works | |
| CN216039660U (en) | Improve life's blast furnace stokehold main trough | |
| US3990686A (en) | Furnace for producing steel from scrap steel and the like | |
| CN216337752U (en) | Novel furnace lining structure for integral casting forming of large-scale blast furnace | |
| CN109055639A (en) | High thermal conductivity Long-life blast furnace hearth and bricking building method | |
| CN210916131U (en) | Novel composite iron notch structure | |
| CN201440041U (en) | Cooling water jacket for high-temperature smelting unit and high-temperature smelting unit with cooling water jacket | |
| CN203550585U (en) | Furnace bottom refractory material structure for liquid deslagging step-type heating furnace | |
| CN113686154A (en) | Repairing method for high-temperature liquid metal discharge port discharge brick | |
| CN203487167U (en) | Blast furnace deslagging groove system with water cooling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 450041 No. 42, Jinping Road, Shangjie District, Zhengzhou City, Henan Province Patentee after: Zhengzhou Ruiwo New Material Co.,Ltd. Address before: 450041 north of 50m west of the intersection of science Avenue and TONGHANG 4 road, Shangjie District, Zhengzhou City, Henan Province Patentee before: REWELL REFRACTORY (ZHENGZHOU) Co.,Ltd. |
|
| CP03 | Change of name, title or address |