CN102445080B - Submerged arc furnace body and constructing method thereof - Google Patents
Submerged arc furnace body and constructing method thereof Download PDFInfo
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- CN102445080B CN102445080B CN201110278454.1A CN201110278454A CN102445080B CN 102445080 B CN102445080 B CN 102445080B CN 201110278454 A CN201110278454 A CN 201110278454A CN 102445080 B CN102445080 B CN 102445080B
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Abstract
The invention provides a submerged arc furnace body. The submerged arc furnace body comprises a furnace bottom and a furnace wall which is connected with the furnace bottom; the furnace bottom comprises an asbestos board layer, a refractory grain layer, a refractory brick layer, a ramming material layer and a refractory material layer, wherein the asbestos board layer is laid on a furnace bottom steel plate; the refractory grain layer is paved on the asbestos board layer; the refractory brick layer is constructed on the refractory grain layer, and comprises refractory bricks and refractory clays filled among the refractory bricks; the ramming material layer is paved on the refractory brick layer; and the refractory material layer is constructed on the ramming material layer. The invention further provides a constructing method for the submerged arc furnace body. Ramming materials are used to replace carbon bricks to construct the submerged arc surface body, the ramming materials can form a firm integrated sintering layer under the high-temperature sintering condition, so that the sintering layer has no seam and does not easily generate cracks in a smelting process while alternatively acted by cold and heat, thus molten iron can be prevented from eroding and burning through the furnace bottom, the service life of the submerged arc furnace is prolonged, the cost of metal melting is reduced, and the safety of the submerged arc furnace body is increased.
Description
Technical field
The invention belongs to mineral hot furnace technical field, particularly relate to a kind of mineral hot furnace body of heater and building method thereof.
Background technology
Mineral hot furnace is a kind ofly inserted by electrode in the liquid molten body such as furnace charge or slag formed by concentrate or ore, rely on the double action of micro-electric arc and the melt resistance that electrode and furnace charge or liquid molten body interface are formed, make electric energy conversion be the heating equipment of heat energy.Mineral hot furnace also known as electric-arc furnace or resistance electric furnace, mainly for the production of the ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicomangan, silicochromium, the pig iron, calcium carbide or boron nitride etc.
Mineral hot furnace is the industrial furnace that a kind of power consumption is huge, primarily of furnace shell, petticoat pipe, furnace bottom, furnace lining, electrode, holder, Electrode Fluctuation and jacking system, short net, water-cooling system, smoke evacuation system, dust pelletizing system, upper feed proportioning system, opens the compositions such as stifled stove eye machine, hydraulic system, ore heat furnace transformer and various electric equipments.Body of heater technical parameter, short net, furnace transformer etc. determine the performance of mineral hot furnace, and furnace bottom furnace lining etc. have material impact to the efficiency of mineral hot furnace.
Prior art discloses the building method of multiple mineral hot furnace furnace lining material and furnace bottom, as with asbestos board, refractory brick and carbon brick for main material, first bottom furnace shell, steel plate lays asbestos board, re-lays the fire-resistant grain of one deck, then refractory brick is built by laying bricks or stones, every layer of refractory brick seat clay cementation of fissures; After laying fireproof bricks reaches requirement for height, carbon brick built by laying bricks or stones by the refractory brick of top layer, is bonded by adhesive between carbon brick and refractory brick, then stick with paste the cementation of fissures with the electrode paste fried or finedraw; While at the bottom of masonry heater, furnace wall lays one deck asbestos board, with fire-resistant grain, tamping is filled in the space between furnace wall asbestos board and furnace bottom refractory brick; Vertical carbon brick built by laying bricks or stones by the asbestos board of furnace wall, then after laminating builds one deck refractory brick in carbon brick, mineral hot furnace furnace bottom and furnace wall can be obtained.In above-mentioned furnace bottom, carbon brick is main material, and when building by laying bricks or stones, the gap between carbon brick is generally 5cm ~ 6cm, and this gap is filled by electrode paste; But, when using this mineral hot furnace to carry out metal smelt, owing to being subject to the effect of colding and heat succeed each other, easily crack is produced between carbon brick, the molten iron of melting easily infiltrates from gap, corrodes furnace bottom, causes mineral hot furnace burn-through of furnace hearth, not only shorten the service life of mineral hot furnace but also cause stopping production, increase maintenance and the cost of Metal Melting, hidden danger can be brought to safety in production simultaneously.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of mineral hot furnace body of heater and building method thereof, and mineral hot furnace body of heater provided by the invention not easily produces crack, safer, and can extend the service life of mineral hot furnace.
The invention provides a kind of mineral hot furnace body of heater, the furnace wall comprising furnace bottom and be connected with described furnace bottom, described furnace bottom comprises:
Be laid in the asbestos flaggy on steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on described asbestos flaggy;
Build the fire brick layer on described fire-resistant granulosa by laying bricks or stones, described fire brick layer comprises refractory brick and is filled in the seat clay between described refractory brick;
Be layed in the ramming bed of material on described fire brick layer;
Build the refractory masses on the described ramming bed of material by laying bricks or stones.
Preferably, the ramming mass in the described ramming bed of material comprises:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
The Al of 0 ~ 1wt%
2o
3;
The SiO of 0 ~ 3wt%
2.
Preferably, described ramming mass comprises:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3;
The Al of 0 ~ 0.5wt%
2o
3;
The SiO of 0 ~ 2.5wt%
2.
Preferably, the granularity≤6mm of described ramming mass.
Preferably, described refractory masses is magnesia brick layer.
Present invention also offers a kind of building method of mineral hot furnace body of heater, comprising:
A) on steel plate of furnace hearth, lay asbestos board, form asbestos flaggy;
B) establish fire-resistant grain on described asbestos flaggy upper berth, form fire-resistant granulosa;
C) on described fire-resistant granulosa, build refractory brick by laying bricks or stones, adopt seat clay to form fire brick layer to after the described refractory brick cementation of fissures;
D) on described fire brick layer, lay ramming mass, after compacting, form the ramming bed of material;
E) on the described ramming bed of material, refractory masses is built by laying bricks or stones.
Preferably, described steps d) specifically comprise:
D1) on described fire brick layer, lay ramming mass, the thickness of described ramming mass is 10cm ~ 15cm;
D2) tamped by described ramming mass, the thickness of the ramming mass after compacting is 8cm ~ 9cm;
D3) steps d 1 is repeated) ~ d2), until obtain the ramming bed of material.
Preferably, described steps d) in, described ramming mass comprises:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
The Al of 0 ~ 1wt%
2o
3;
The SiO of 0 ~ 3wt%
2.
Preferably, described ramming mass comprises:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3;
The Al of 0 ~ 0.5wt%
2o
3;
The SiO of 0 ~ 2.5wt%
2.
Preferably, the granularity≤6mm of described ramming mass.
Compared with prior art, mineral hot furnace body of heater furnace bottom provided by the invention and the furnace wall be connected with described furnace bottom, described furnace bottom comprises the asbestos flaggy be laid on steel plate of furnace hearth, the fire-resistant granulosa be layed on described asbestos flaggy, the fire brick layer of building by laying bricks or stones on described fire-resistant granulosa, the refractory masses that is layed in the ramming bed of material on described fire brick layer and builds by laying bricks or stones on the described ramming bed of material.The present invention replaces carbon brick to build mineral hot furnace body of heater by laying bricks or stones with ramming mass, ramming mass be with carborundum, graphite, electric calcined anthracite be raw material, with electric smelting cement or compound resin be bonding agent, the loose shape material body made of admixture multiple superfine powder additive, there is high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability.Ramming mass can form solid integral sintered layer when high temperature sintering, there is not gap in this sinter layer, not easily crack is produced by during cold and hot alternating action in smelting process, molten iron can be avoided to corrode furnace bottom, by burn-through of furnace hearth, thus extend mineral hot furnace service life, reduce the cost of Metal Melting, add the security of mineral hot furnace.In addition, when building mineral hot furnace body of heater by laying bricks or stones with ramming mass, ramming mass not easily with the metal generation chemical reactions such as iron, thus improve the metallurgical effect of mineral hot furnace.
Accompanying drawing explanation
The structural representation of the mineral hot furnace body of heater that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
The invention provides a kind of mineral hot furnace body of heater, the furnace wall comprising furnace bottom and be connected with described furnace bottom, described furnace bottom comprises:
Be laid in the asbestos flaggy on steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on described asbestos flaggy;
Build the fire brick layer on described fire-resistant granulosa by laying bricks or stones, described fire brick layer comprises refractory brick and is filled in the seat clay between described refractory brick;
Be layed in the ramming bed of material on described fire brick layer;
Build the refractory masses on the described ramming bed of material by laying bricks or stones.
The present invention replaces carbon brick to build mineral hot furnace body of heater by laying bricks or stones with ramming mass, extends the service life of mineral hot furnace, improves the metallurgical effect of mineral hot furnace.
The furnace wall that described mineral hot furnace body of heater comprises furnace bottom and is connected with described furnace bottom, in the present invention, described furnace bottom refers to that, below metallic solution district, furnace wall refers to the side in metallic solution district.
See Fig. 1, the structural representation of the mineral hot furnace body of heater that Fig. 1 provides for the embodiment of the present invention, wherein, 1 is steel plate of furnace hearth, 2 for being laid in the asbestos flaggy on steel plate of furnace hearth 1, and 3 for being layed in the fire-resistant granulosa on asbestos flaggy 2, and 4 for building by laying bricks or stones and the fire brick layer on fire-resistant granulosa 3,5 for being layed in the ramming bed of material on fire brick layer 4, and 6 for building the magnesia brick layer on the ramming bed of material 5 by laying bricks or stones.
In the present embodiment, mineral hot furnace body of heater is steel construction, namely comprises the furnace wall steel plate of steel plate of furnace hearth and ring-type, steel plate of furnace hearth and furnace wall Plate Welding or connect as one by other means, forms the shell of mineral hot furnace.
Asbestos flaggy 2 is laid on steel plate of furnace hearth 1, plays the effect of adiabatic heat-insulation.Fire-resistant granulosa 3 is layed on asbestos flaggy 2, can be used for filling the gap between asbestos flaggy 2 and fire brick layer 4, plays heat insulation effect simultaneously.Fire brick layer 4 is built by laying bricks or stones on fire-resistant granulosa 3, play the effect of insulation and reduction expansive force, fire brick layer 4 comprises refractory brick and is filled in the seat clay (not illustrating in the drawings) between described refractory brick, the effect of seat clay is to fill the gap between refractory brick, forms the fire brick layer of compact structure.The ramming bed of material 5 is layed on fire brick layer 4, can improve and avoid molten iron to corrode furnace bottom, by burn-through of furnace hearth; Magnesia brick layer 6 is built by laying bricks or stones on the ramming bed of material 5, directly contacts with metal smelting as working lining.
In the present invention, asbestos flaggy 2 is made up of asbestos board, is preferably silicates asbestos board, as applied flexibly alumina silicate etc.
Fire-resistant granulosa 3 is made up of fire-resistant grain, can be silicate granules, as alumina silicate etc.
In the present invention, the ramming bed of material 5 is formed by ramming mass, described ramming mass be with carborundum, graphite, electric calcined anthracite be raw material, with electric smelting cement or compound resin be bonding agent, the loose shape material body made of admixture multiple superfine powder additive, there is high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability.Ramming mass can form the integral sintered layer of ceramic-like material when high temperature sintering, there is not gap in this sinter layer, not easily crack is produced by during cold and hot alternating action in smelting process, molten iron can be avoided to corrode furnace bottom, by burn-through of furnace hearth, thus extend mineral hot furnace service life, reduce the cost of Metal Melting, add the security of mineral hot furnace.
In the present invention, described ramming mass preferably includes:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
The Al of 0 ~ 1wt%
2o
3;
The SiO of 0 ~ 3wt%
2.
More preferably comprise:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3;
The Al of 0 ~ 0.5wt%
2o
3;
The SiO of 0 ~ 2.5wt%
2.
MgO is the main component of described ramming mass, and its content is preferably 60wt% ~ 95wt%, is more preferably 65wt% ~ 90wt%, most preferably is 70wt% ~ 85wt%.
Described ramming mass also comprises CaO, and its content is preferably 3wt% ~ 30wt%, is more preferably 5wt% ~ 25wt%, most preferably is 10wt% ~ 20wt%.
Described ramming mass also comprises Fe
2o
3, its content is preferably 2wt% ~ 10wt%, is more preferably 3wt% ~ 7wt%, most preferably is 4wt% ~ 6wt%.
Described ramming mass also comprises Al
2o
3, its content preferably lower than 1wt%, more preferably less than 0.5wt%, most preferably lower than 0.3wt%.
Described ramming mass also comprises SiO
2, its content preferably lower than 3wt%, more preferably less than 2.5wt%, most preferably lower than 2wt%.
In addition to the components described above, described ramming mass can also comprise the components such as electric smelting cement well known to those skilled in the art, compound resin or other superfine powder additives.
In the present invention, the granularity of described ramming mass is preferably≤6mm, is more preferably≤5mm.The granuloplastic ramming bed of material of the ramming mass that granularity is less is more not easy to form gap, is not easy to occur crack, can avoid the phenomenon generation of molten iron infiltration, burn-through of furnace hearth.
Magnesia brick layer 6 can play the effect of protection wall, ensures the normal sintering of ramming mass, plays the effect of insulation and reduction expansive force simultaneously.In the present invention, magnesia brick layer 6 can also be formed by other magnesia refractories.
In the present invention, described mineral hot furnace furnace wall comprises:
Be laid in the asbestos flaggy on the steel plate of furnace wall;
Be layed in the fire-resistant granulosa on described asbestos flaggy;
Build the fire brick layer on described fire-resistant granulosa by laying bricks or stones, described fire brick layer comprises refractory brick and is filled in the seat clay between described refractory brick;
Be layed in the ramming bed of material on described fire brick layer;
Build the refractory masses on the described ramming bed of material by laying bricks or stones.
Described mineral hot furnace furnace wall has identical structure with furnace bottom, the asbestos flaggy of furnace wall is connected with the asbestos flaggy of furnace bottom, the fire brick layer of furnace wall is connected with the fire brick layer of furnace bottom, the ramming bed of material of furnace wall is connected with the ramming bed of material of furnace bottom, the refractory masses of furnace wall is connected with the refractory masses of furnace bottom, i.e. asbestos flaggy, fire brick layer, the ramming bed of material and refractory masses all form overall structure, namely on body of heater steel plate, asbestos flaggy is laid, fire-resistant granulosa is established on asbestos flaggy upper berth, fire-resistant granulosa builds fire brick layer by laying bricks or stones, fire brick layer is laid ramming mass layer, the ramming bed of material builds refractory masses by laying bricks or stones, when building fire brick layer by laying bricks or stones, furnace bottom fire brick layer and furnace wall fire brick layer are built by laying bricks or stones simultaneously and are formed overall fire brick layer, when laying the ramming bed of material, the furnace bottom ramming bed of material and the furnace wall ramming bed of material are laid simultaneously and are formed the overall ramming bed of material, when building refractory masses by laying bricks or stones, bottom refractory layer and furnace wall refractory layer are built by laying bricks or stones simultaneously and are formed overall refractory masses, simultaneously, top due to refractory masses is metallic solution district, the described furnace bottom ramming bed of material and described furnace wall ramming bed of material Formation cross-section are the ramming bed of material of matrix, described bottom refractory layer and described furnace wall refractory layer Formation cross-section are the ramming bed of material of matrix, ground, metallic solution district solution is made both to be difficult to seepage from below, also seepage is from the side difficult to.
Present invention also offers a kind of building method of mineral hot furnace body of heater, comprising:
A) on steel plate of furnace hearth, lay asbestos board, form asbestos flaggy;
B) establish fire-resistant grain on described asbestos flaggy upper berth, form fire-resistant granulosa;
C) on described fire-resistant granulosa, build refractory brick by laying bricks or stones, adopt seat clay to form fire brick layer to after the described refractory brick cementation of fissures;
D) on described fire brick layer, lay ramming mass, after compacting, form the ramming bed of material;
E) on the described ramming bed of material, refractory masses is built by laying bricks or stones.
First on steel plate of furnace hearth, lay asbestos board, form asbestos flaggy.The present invention does not have particular/special requirement to described asbestos board, meets the asbestos board of mineral hot furnace adiabatic heat-insulation, is preferably silicates asbestos board, as applied flexibly alumina silicate etc.The present invention is not particularly limited described laying method, laying well known to those skilled in the art, bonding.The thickness of the present invention to described asbestos flaggy is not particularly limited, and meets the requirement of mineral hot furnace adiabatic heat-insulation.
After forming asbestos flaggy, establish fire-resistant grain on described asbestos flaggy upper berth, form fire-resistant granulosa, described fire-resistant grain can fill the gap between asbestos flaggy and fire brick layer, reduces the possibility that molten iron infiltrates.When laying fire-resistant grain, preferably by described fire-resistant granulosa compacting.The thickness of the present invention to described fire-resistant grain and described fire-resistant granulosa is all not particularly limited.
After forming fire-resistant granulosa, described fire-resistant granulosa builds refractory brick by laying bricks or stones, form fire brick layer with seat clay to after the described refractory brick cementation of fissures.The present invention preferably adopts herringbone pattern to build refractory brick by laying bricks or stones, and after building one deck refractory brick by laying bricks or stones, preferably adopt seat clay to the described refractory brick cementation of fissures, then continue to build refractory brick by laying bricks or stones, continuation seat clay carries out the cementation of fissures, until reach predetermined altitude.
When building refractory brick by laying bricks or stones, the circle that the circle that upper strata refractory brick is formed and lower floor refractory brick are formed has different diameters, the diameter of a circle that those skilled in the art can be formed upper strata refractory brick according to the requirement of mineral hot furnace and the diameter of a circle that lower floor's refractory brick is formed adjust, and the angle as the diameter that can make the diameter of upper strata refractory brick and lower floor's refractory brick is at 45 ° or 60 °.
In order to avoid mineral hot furnace furnace wall burns, while refractory brick at the bottom of masonry heater, preferably on furnace wall, lay asbestos board, and with fire-resistant grain, tamping is filled in the gap between furnace wall asbestos board and furnace bottom refractory brick.
The present invention is not particularly limited the thickness of described refractory brick, material, the thickness of described fire brick layer is also not particularly limited, those skilled in the art can select the material of refractory brick according to the purposes of mineral hot furnace, and according to the thickness of the thickness of refractory brick and the requirement determination fire brick layer of mineral hot furnace.
In the process of building fire brick layer by laying bricks or stones, between every layer of refractory brick, use the seat clay cementation of fissures, after reaching predetermined altitude, continue to use the seat clay cementation of fissures, obtain fire brick layer.
After forming fire brick layer, described fire brick layer lays ramming mass, form the ramming bed of material, the concrete grammar of described laying ramming mass is as follows:
D1) fire brick layer after the described cementation of fissures lays ramming mass, and the thickness of described ramming mass is 10cm ~ 15cm;
D2) tamped by described ramming mass, the thickness of the ramming mass after compacting is 8cm ~ 9cm;
D3) steps d 1 is repeated) ~ d2), until obtain the ramming bed of material.
First the ramming mass that on the fire brick layer after the described cementation of fissures, even place mat 10cm ~ 15cm is thick, is tamped described ramming mass by ramming machine, and the thickness after compacting is 8cm ~ 9cm.The present invention adopts the insertion depth of iron wire to verify the degree of compacting.After compacting, continue even place mat ramming mass, continue compacting, repeat above-mentioned steps until form the ramming bed of material of predetermined thickness.
For avoiding molten iron burning and corroding furnace wall and furnace bottom, the cross section of the described ramming bed of material is spill, makes furnace bottom and furnace wall all have the ramming bed of material.
In the present invention, described ramming mass be with carborundum, graphite, electric calcined anthracite be raw material, with electric smelting cement or compound resin be bonding agent, the loose shape material body made of admixture multiple superfine powder additive, there is high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability.Ramming mass can form solid integral sintered layer when high temperature sintering, there is not gap in this sinter layer, not easily crack is produced by during cold and hot alternating action in smelting process, molten iron can be avoided to corrode furnace bottom, by burn-through of furnace hearth, thus extend mineral hot furnace service life, reduce the cost of Metal Melting, add the security of mineral hot furnace.
Described ramming mass preferably includes:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
The Al of 0 ~ 1wt%
2o
3;
The SiO of 0 ~ 3wt%
2.
More preferably comprise:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3;
The Al of 0 ~ 0.5wt%
2o
3;
The SiO of 0 ~ 2.5wt%
2.
MgO is the main component of described ramming mass, and its content is preferably 60wt% ~ 95wt%, is more preferably 65wt% ~ 90wt%, most preferably is 70wt% ~ 85wt%.
Described ramming mass also comprises CaO, and its content is preferably 3wt% ~ 30wt%, is more preferably 5wt% ~ 25wt%, most preferably is 10wt% ~ 20wt%.
Described ramming mass also comprises Fe
2o
3, its content is preferably 2wt% ~ 10wt%, is more preferably 3wt% ~ 7wt%, most preferably is 4wt% ~ 6wt%.
Described ramming mass also comprises Al
2o
3, its content preferably lower than 1wt%, more preferably less than 0.5wt%, most preferably lower than 0.3wt%.
Described ramming mass also comprises SiO
2, its content preferably lower than 3wt%, more preferably less than 2.5wt%, most preferably lower than 2wt%.
In addition to the components described above, described ramming mass can also comprise the components such as electric smelting cement well known to those skilled in the art, compound resin or other superfine powder additives.
In the present invention, the granularity of described ramming mass is preferably≤6mm, is more preferably≤5mm.The granuloplastic ramming bed of material of the ramming mass that granularity is less is more not easy to form gap, is not easy to occur crack, can avoid the phenomenon generation of molten iron infiltration, burn-through of furnace hearth.
After forming the ramming bed of material, the described ramming bed of material builds refractory masses by laying bricks or stones, described refractory masses can play the effect of protection wall, ensures the normal sintering of ramming mass, plays the effect of insulation and reduction expansive force simultaneously.In the present invention, described refractory masses is preferably magnesia brick layer.When building refractory masses by laying bricks or stones according to the shape of the ramming bed of material, build into refractory masses by laying bricks or stones matrix.
Build by laying bricks or stones after obtaining mineral hot furnace body of heater, on the basis of described mineral hot furnace body of heater installing electrodes, holder, Electrode Fluctuation and lowering or hoisting gear, hydraulic system, short net, furnace transformer, water-cooling system, smoke evacuation system, dust pelletizing system, on after feed proportioning system and other electric equipments, can mineral hot furnace be obtained.
After obtaining mineral hot furnace, adopt described mineral hot furnace to carry out metal smelt, result shows, adopts to reach more than 2 years the service life of the mineral hot furnace at the bottom of mineral hot furnace provided by the invention, substantially increases the service life of mineral hot furnace.
In order to further illustrate the present invention, below in conjunction with embodiment, mineral hot furnace furnace bottom provided by the invention and building method thereof are described in detail.
Embodiment 1
Ground lays asbestos board, forms asbestos flaggy; Establish fire-resistant grain on described asbestos flaggy upper berth, form fire-resistant granulosa; Described fire-resistant granulosa builds refractory brick by laying bricks or stones, between every layer of refractory brick, uses the seat clay cementation of fissures, until form the fire brick layer of predetermined altitude; While building refractory brick by laying bricks or stones, furnace wall lays asbestos board, and with fire-resistant grain, tamping is filled in the gap between furnace wall asbestos board and furnace bottom refractory brick; Then the ramming mass that even place mat 12cm is thick on fire brick layer, tamps to 8cm; The ramming mass that evenly place mat 12cm is thick again, tamps to 8cm, repeats above-mentioned steps to the ramming bed of material obtaining predetermined thickness, after building magnesia brick by laying bricks or stones again on the ramming bed of material, obtain mineral hot furnace furnace bottom, wherein, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-85B.
Based on described mineral hot furnace furnace bottom, install short net, smoke evacuation system, dust pelletizing system, electrode shell, Electrode Fluctuation and jacking system, loading and unloading system, after hydraulic system and transformer, the mineral hot furnace shown in Fig. 1 can be obtained.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 2 years, and furnace bottom does not occur burning phenomenon.
Embodiment 2
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-85A.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 18 months, and furnace bottom does not occur burning phenomenon.
Embodiment 3
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-12A.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 30 months, and furnace bottom does not occur burning phenomenon.
Embodiment 4
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-12B.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 2 years, and furnace bottom does not occur burning phenomenon.
Embodiment 5
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-26A.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 18 months, and furnace bottom does not occur burning phenomenon.
Embodiment 6
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-26B.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 30 months, and furnace bottom does not occur burning phenomenon.
Embodiment 7
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, ramming mass is purchased from Dashiqiao City red rock Refractory Co., ltd, and model is HLD-27.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 2 years, and furnace bottom does not occur burning phenomenon.
Comparative example 1
Adopt the method for embodiment 1 to build mineral hot furnace by laying bricks or stones, difference is, the fire brick layer after the cementation of fissures builds carbon brick by laying bricks or stones, with the electrode paste cementation of fissures fried between every layer of carbon brick.
Adopt described mineral hot furnace to carry out metal smelt, result shows, described mineral hot furnace normally uses 3 months, and furnace bottom occurs burning phenomenon.
From above-described embodiment and comparative example, adopt the service life of the mineral hot furnace of mineral hot furnace furnace bottom provided by the invention longer, metal smelt cost can be reduced.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a mineral hot furnace body of heater, the furnace wall comprising furnace bottom and be connected with described furnace bottom, described furnace bottom comprises:
Be laid in the asbestos flaggy on steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on described asbestos flaggy;
Build the fire brick layer on described fire-resistant granulosa by laying bricks or stones, described fire brick layer comprises refractory brick and is filled in the seat clay between described refractory brick;
Be layed in the ramming bed of material on described fire brick layer, the preparation method of the described ramming bed of material is as follows:
D1) on described fire brick layer, lay ramming mass, the thickness of described ramming mass is 10cm ~ 15cm;
D2) tamped by described ramming mass, the thickness of the ramming mass after compacting is 8cm ~ 9cm;
Repeat steps d 1) ~ d2), until obtain the ramming bed of material;
Ramming mass in the described ramming bed of material is composed of the following components:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
Build the refractory masses on the described ramming bed of material by laying bricks or stones.
2. mineral hot furnace body of heater according to claim 1, is characterized in that, described ramming mass is composed of the following components:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3.
3. mineral hot furnace body of heater according to claim 2, is characterized in that, the granularity≤6mm of described ramming mass.
4. the mineral hot furnace body of heater according to claims 1 to 3 any one, is characterized in that, described refractory masses is magnesia brick layer.
5. a building method for mineral hot furnace body of heater, comprising:
A) on steel plate of furnace hearth, lay asbestos board, form asbestos flaggy;
B) establish fire-resistant grain on described asbestos flaggy upper berth, form fire-resistant granulosa;
C) on described fire-resistant granulosa, build refractory brick by laying bricks or stones, adopt seat clay to form fire brick layer to after the described refractory brick cementation of fissures;
D) on described fire brick layer, lay ramming mass, after compacting, form the ramming bed of material;
E) on the described ramming bed of material, refractory masses is built by laying bricks or stones;
Described steps d) specifically comprise:
D1) on described fire brick layer, lay ramming mass, the thickness of described ramming mass is 10cm ~ 15cm;
Described ramming mass is composed of the following components:
The MgO of 60wt% ~ 95wt%;
The CaO of 3wt% ~ 30wt%;
The Fe of 2wt% ~ 10wt%
2o
3;
D2) tamped by described ramming mass, the thickness of the ramming mass after compacting is 8cm ~ 9cm;
D3) steps d 1 is repeated) ~ d2), until obtain the ramming bed of material.
6. building method according to claim 5, is characterized in that, described ramming mass is composed of the following components:
The MgO of 65wt% ~ 90wt%;
The CaO of 5wt% ~ 25wt%;
The Fe of 3wt% ~ 7wt%
2o
3.
7. building method according to claim 6, is characterized in that, the granularity≤6mm of described ramming mass.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102967148A (en) * | 2012-12-04 | 2013-03-13 | 沈恩有 | Fireproof construction method for hearth of ferro-nickel furnace with power of over 16,500 KW |
| CN106288806B (en) * | 2015-05-11 | 2018-09-11 | 中国恩菲工程技术有限公司 | metallurgical furnace |
| CN109084589A (en) * | 2018-09-27 | 2018-12-25 | 阳江翌川金属科技有限公司 | A kind of mineral hot furnace dirt-excluding groove new construction and construction technology |
| 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 |
| CN110256056B (en) * | 2019-05-21 | 2022-11-29 | 上海宝钢工业技术服务有限公司 | Titanium-containing furnace protection ramming mass for overall restoration of blast furnace hearth and use method |
| 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 |
| CN113108607A (en) * | 2021-04-15 | 2021-07-13 | 嘉峪关宏电铁合金有限责任公司 | Quick repairing process for lining of silicomanganese ore heating furnace with super furnace age |
| 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 |
| CN114315320B (en) * | 2021-12-29 | 2023-03-24 | 耐镁佳(营口)金属有限公司 | Magnesium oxide refractory material and application thereof |
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