CN102967148A - Fireproof construction method for hearth of ferro-nickel furnace with power of over 16,500 KW - Google Patents
Fireproof construction method for hearth of ferro-nickel furnace with power of over 16,500 KW Download PDFInfo
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- CN102967148A CN102967148A CN2012105142141A CN201210514214A CN102967148A CN 102967148 A CN102967148 A CN 102967148A CN 2012105142141 A CN2012105142141 A CN 2012105142141A CN 201210514214 A CN201210514214 A CN 201210514214A CN 102967148 A CN102967148 A CN 102967148A
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Abstract
The invention relates to a fireproof construction method for a hearth of a ferro-nickel furnace with the power of over 16,500 KW, which is characterized by comprising the following steps: firstly, laying refractory bricks on a hearth steel plate to form a refractory brick cushion layer; secondly, laying 2 to 5 layers of ramming materials with the magnesium oxide content of 85 to 95 percent on the refractory brick layer; thirdly, laying 2 to 5 layers of ramming materials with the magnesium oxide content of 80 to 84 percent on the ramming layers formed in the second step; and fourthly, laying one layer of refractory bricks on the ramming material layer formed in the third step and compacting to complete the operation. The fireproof construction method for the hearth of the ferro-nickel furnace with the power of over 16,500 KW has the advantages of realizing a long furnace life, delaying the time of generating the phenomenon of iron leakage at the hearth, achieving the long-term use effect, improving safety guarantee and saving enterprise cost, and is an ideal furnace building method.
Description
Technical field
The present invention relates to mineral hot furnace refractory material laying technical field, particularly the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method.
Background technology
Large-scale mineral hot furnace is produced ferronickel and is difficult in the prior art realize long furnace life more than 16500 kilowatts, generally a year and a half with the interior furnace lining of just changing a time.Because smelting ferronickel is larger to the furnace bottom infringement, less to the furnace wall infringement, and furnace bottom can not be repaired, and can only blowing out change, and causes very big unfavorable economy and time.Method is to adopt furnace bottom to divide two parts to finish at the bottom of original masonry heater, at first is one meter left and right sides refractory brick of making on the furnace bottom asbestos board, then directly spreads a kind of ramming mass on refractory brick, is taped against highest point, about one and half position always.Then, on ramming mass, lay one deck or two-layer magnesia brick.The deficiency of this brickwork method is: smelting ferronickel is the smelting of conduction difficulty in the high-order material of electrode, reason is the raw materials for metallurgy that forms through behind the lateritic nickel ore sintering, it is higher to contain silica, the effect that has restriction electrode arc light to produce, when operation is smelted, electrode position have to be moved down, reach energising striking effect, operating voltage can be full of, because too near apart from bottom refractory, producing larger arc light impacts and high temperature, this just needs furnace hearth material to have Fast Sintering, anti-shock strength is carried rapidly high performance refractory material, furnace bottom generally adopts and is rich in a kind of magnesian ramming mass of Fast Sintering at present, wherein agglutinant adopts di-iron trioxide, mass ratio is 4-6%, magnesia is 80-84% in order to be effective wherein, silica is 1-2%, calcium oxide 5-12%, this ramming mass can reach temporary transient desirable result of use, but because it is not high to contain magnesia, sintering is rapid, so adopt the long-time high temperature sintering of this process fully, make furnace bottom burn till complete crystalloid, become a whole periclase, the periclase characteristics be under pressure or shake after be easy to split, the phenomenon that this just causes at present a lot of factories to live through---furnace bottom leaks iron, and producing stops tears the stove rebuilding open, brings larger cost to drop into to enterprise.
Summary of the invention
The objective of the invention is to reach permanent refractory in order to make furnace bottom keep the state that do not ftracture, greatly increase the service life, the spy provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method.
The invention provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method, it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises:
The first step is laid refractory brick at steel plate of furnace hearth, forms the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether the 2-5 layer; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether the 2-5 layer; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
Second step in the described method specifically comprises: at first lay ramming mass at described fire brick layer, the thickness of described ramming mass is the 100-300 millimeter; Secondly, be that the ramming mass of 85-95% is successively tamped with content of magnesia, lay altogether the 2-5 layer.
In the described method the 3rd step specifically comprises: at first, continue to lay ramming mass at the described ramming bed of material, the thickness of described ramming mass is the 100-300 millimeter; Secondly, be that the ramming mass of 80-84% is successively tamped with content of magnesia, lay altogether the 2-5 layer.
Advantage of the present invention:
The above ferronickel stove of 16500KW of the present invention furnace bottom fire-proof construction method can realize long furnace life, prolongs the time that furnace bottom leaks the generation of iron phenomenon, saves entreprise cost.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is that the magnesian ramming mass of different content is laid two-layer schematic diagram;
Fig. 2 is that the magnesian ramming mass of different content is laid three layers of schematic diagram;
Among Fig. 2, three layers of magnesian content are followed successively by 90-95%, 80-90%, 80-85% from bottom to top.
The specific embodiment
Embodiment 1
The invention provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method, it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises:
The first step is laid refractory brick at steel plate of furnace hearth, forms the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether three layers; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether three layers; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
Adopt above method to build stove, 12 months furnace life.
Embodiment 2
The invention provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method, it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises:
The first step is laid refractory brick at steel plate of furnace hearth, forms the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether three layers; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether three layers; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
Second step in the described method specifically comprises: at first lay ramming mass at described fire brick layer, the thickness of described ramming mass is 200 millimeters; Secondly, be that the ramming mass of 85-95% is successively tamped with content of magnesia, lay altogether three layers.
In the described method the 3rd step specifically comprises: at first, continue to lay ramming mass at the described ramming bed of material, the thickness of described ramming mass is 200 millimeters; Secondly, be that the ramming mass of 80-84% is successively tamped with content of magnesia, lay altogether three layers.
Adopt above method to build stove, 36 months furnace life.
Embodiment 3
Present embodiment provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method, and it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises: the first step, lay refractory brick at steel plate of furnace hearth, and form the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether 2 layers; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether 2 layers; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
Second step in the described method specifically comprises: at first lay ramming mass at described fire brick layer, the thickness of described ramming mass is 100 millimeters; Secondly, be that the ramming mass of 85-95% is successively tamped with content of magnesia, lay altogether 2 layers.
In the described method the 3rd step specifically comprises: at first, continue to lay ramming mass at the described ramming bed of material, the thickness of described ramming mass is 100 millimeters; Secondly, be that the ramming mass of 80-84% is successively tamped with content of magnesia, lay altogether 2 layers.
Adopt above method to build stove, 36 months furnace life.
Embodiment 4
Present embodiment provides the above ferronickel stove of a kind of 16500KW furnace bottom fire-proof construction method, and it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises:
The first step is laid refractory brick at steel plate of furnace hearth, forms the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether 5 layers; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether 5 layers; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
Second step in the described method specifically comprises: at first lay ramming mass at described fire brick layer, the thickness of described ramming mass is 300 millimeters; Secondly, be that the ramming mass of 85-95% is successively tamped with content of magnesia, lay altogether 5 layers.
In the described method the 3rd step specifically comprises: at first, continue to lay ramming mass at the described ramming bed of material, the thickness of described ramming mass is 300 millimeters; Secondly, be that the ramming mass of 80-84% is successively tamped with content of magnesia, lay altogether 5 layers.
Adopt above method to build stove, 36 months furnace life.
Claims (3)
1. the above ferronickel stove of 16500KW furnace bottom fire-proof construction method, it is characterized in that: described 16500KW above ferronickel stove furnace bottom fire-proof construction method comprises:
The first step is laid refractory brick at steel plate of furnace hearth, forms the refractory brick bed course; Second step, content of magnesia is the ramming mass of 85-95% on described fire brick layer upper berth, spreads altogether the 2-5 layer; The 3rd step on described ramming layer, repaved the ramming mass that content of magnesia is 80-84, spread altogether the 2-5 layer; The 4th step, establish one deck refractory brick on the 3rd step described ramming bed of material upper berth, compacting is finished.
2. according to the above ferronickel stove of 16500KW claimed in claim 1 furnace bottom fire-proof construction method, it is characterized in that: the second step in the described method specifically comprises: at first lay ramming mass at described fire brick layer, the thickness of described ramming mass is the 100-300 millimeter; Secondly, be that the ramming mass of 85-95% is successively tamped with content of magnesia, lay altogether the 2-5 layer.
3. according to the above ferronickel stove of 16500KW claimed in claim 1 furnace bottom fire-proof construction method, it is characterized in that: the step of the 3rd in the described method specifically comprises: at first, continue to lay ramming mass at the described ramming bed of material, the thickness of described ramming mass is the 100-300 millimeter; Secondly, be that the ramming mass of 80-84% is successively tamped with content of magnesia, lay altogether the 2-5 layer.
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| CN2012105142141A CN102967148A (en) | 2012-12-04 | 2012-12-04 | Fireproof construction method for hearth of ferro-nickel furnace with power of over 16,500 KW |
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| CN2012105142141A CN102967148A (en) | 2012-12-04 | 2012-12-04 | Fireproof construction method for hearth of ferro-nickel furnace with power of over 16,500 KW |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631587A (en) * | 2018-12-26 | 2019-04-16 | 焦作市嘉兴科技有限公司 | A kind of corundum smelting cupola well builds by laying technique |
| CN112880409A (en) * | 2021-01-12 | 2021-06-01 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN114315320A (en) * | 2021-12-29 | 2022-04-12 | 耐镁佳(营口)金属有限公司 | Magnesium oxide refractory material and application thereof |
Citations (4)
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| FR2816041A1 (en) * | 2000-10-27 | 2002-05-03 | Novatherm | Fireproof cladding, for inner wall of furnace housing, has non-metal sealing layer against wall covered by groups of structured insulating layers to prevent corrosive vapors condensing on wall |
| JP2008128548A (en) * | 2006-11-20 | 2008-06-05 | Tsukishima Kankyo Engineering Ltd | Furnace wall stacking method for incinerator and incinerator |
| CN101672576A (en) * | 2009-09-29 | 2010-03-17 | 沈阳东大三建工业炉制造有限公司 | Furnace hearth of maintaining room of aluminum alloy melting furnace built by combining casting materials with precast bricks |
| CN102445080A (en) * | 2011-09-19 | 2012-05-09 | 李成武 | Submerged arc furnace body and constructing method thereof |
-
2012
- 2012-12-04 CN CN2012105142141A patent/CN102967148A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2816041A1 (en) * | 2000-10-27 | 2002-05-03 | Novatherm | Fireproof cladding, for inner wall of furnace housing, has non-metal sealing layer against wall covered by groups of structured insulating layers to prevent corrosive vapors condensing on wall |
| JP2008128548A (en) * | 2006-11-20 | 2008-06-05 | Tsukishima Kankyo Engineering Ltd | Furnace wall stacking method for incinerator and incinerator |
| CN101672576A (en) * | 2009-09-29 | 2010-03-17 | 沈阳东大三建工业炉制造有限公司 | Furnace hearth of maintaining room of aluminum alloy melting furnace built by combining casting materials with precast bricks |
| CN102445080A (en) * | 2011-09-19 | 2012-05-09 | 李成武 | Submerged arc furnace body and constructing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631587A (en) * | 2018-12-26 | 2019-04-16 | 焦作市嘉兴科技有限公司 | A kind of corundum smelting cupola well builds by laying technique |
| CN112880409A (en) * | 2021-01-12 | 2021-06-01 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN112880409B (en) * | 2021-01-12 | 2022-11-11 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN114315320A (en) * | 2021-12-29 | 2022-04-12 | 耐镁佳(营口)金属有限公司 | Magnesium oxide refractory material and application thereof |
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Application publication date: 20130313 |