CN102445080A - Submerged arc furnace body and constructing method thereof - Google Patents
Submerged arc furnace body and constructing method thereof Download PDFInfo
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- CN102445080A CN102445080A CN2011102784541A CN201110278454A CN102445080A CN 102445080 A CN102445080 A CN 102445080A CN 2011102784541 A CN2011102784541 A CN 2011102784541A CN 201110278454 A CN201110278454 A CN 201110278454A CN 102445080 A CN102445080 A CN 102445080A
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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 the hot stove technical field in ore deposit, relate in particular to hot furnace body in a kind of ore deposit and building method thereof.
Background technology
The hot stove in ore deposit is a kind ofly electrode to be inserted in the liquid molten bodies such as the furnace charge that formed by concentrate or ore or slag; The little electric arc that forms on dependence electrode and furnace charge or the liquid molten body interface and the double action of melt resistance make electric energy be converted into the heating equipment of heat energy.The hot stove in ore deposit is claimed electric arc electric furnace or resistance electric furnace again, is mainly used in ferroalloy, the pig iron, calcium carbide or boron nitride etc. such as producing ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicomangan, silicochromium.
The hot stove in ore deposit is the huge industrial furnace of a kind of power consumption, mainly by furnace shell, petticoat pipe, furnace bottom, furnace lining, electrode, control device, electrode presses and jacking system, short net, water-cooling system, smoke evacuation system, dust pelletizing system, go up feed proportioning system, drive stifled stove eye machine, hydraulic system, ore heat furnace transformer and various electric equipments etc. and form.Body of heater technical parameter, short net, furnace transformer etc. have determined the performance of the hot stove in ore deposit, and furnace bottom furnace lining etc. have material impact to the smelting efficient of the hot stove in ore deposit.
Prior art discloses the building method of hot furnace lining material in multiple ore deposit and furnace bottom; As being main material with asbestos board, refractory brick and carbon brick, at first on the steel plate of furnace shell bottom, lay asbestos board, re-lay the fire-resistant grain of one deck; Build refractory brick then by laying bricks or stones, every layer of refractory brick is used the seat clay cementation of fissures; When refractory brick build by laying bricks or stones reach requirement for height after, on the refractory brick of top layer, build carbon brick by laying bricks or stones, bonding between carbon brick and the refractory brick through adhesive, stick with paste the cementation of fissures with frying good electrode paste or finedraw then; In at the bottom of the masonry heater, on furnace wall, lay one deck asbestos board, with fire-resistant grain tamping is filled in the space between furnace wall asbestos board and the furnace bottom refractory brick; On the asbestos board of furnace wall, build upright carbon brick by laying bricks or stones, after laminating is built one deck refractory brick in carbon brick again, can obtain hot stove furnace bottom in ore deposit and furnace wall.In above-mentioned furnace bottom, carbon brick is a main material, and when building by laying bricks or stones, the slit between the carbon brick is generally 5cm～6cm, and this slit is filled by electrode paste; But, when using the hot stove in this ore deposit to carry out metal smelt, owing to receive the effect of colding and heat succeed each other; Be easy to generate the crack between the carbon brick; The molten iron of melting infiltrates from the slit easily, corrodes furnace bottom, causes the hot stove burn-through of furnace hearth in ore deposit; Not only shorten the service life of the hot stove in ore deposit but also cause stopping production, increase the cost of maintenance and Metal Melting, can bring hidden danger to safety in production simultaneously.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide hot furnace body in a kind of ore deposit and building method thereof, and the hot furnace body in ore deposit provided by the invention is difficult for producing crack, safer, and can prolong the service life of the hot stove in ore deposit.
The invention provides the hot furnace body in a kind of ore deposit, comprise furnace bottom and the furnace wall that is connected with said furnace bottom, said furnace bottom comprises:
Be laid in the asbestos flaggy on the steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on the said asbestos flaggy;
Build the fire brick layer on said fire-resistant granulosa by laying bricks or stones, said fire brick layer comprises refractory brick and is filled in the seat clay between the said refractory brick;
Be layed in the ramming bed of material on the said fire brick layer;
Build the refractory masses on the said ramming bed of material by laying bricks or stones.
Preferably, the ramming mass in the said 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, said 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 said ramming mass.
Preferably, said refractory masses is the magnesia brick layer.
The present invention also provides the building method of the hot furnace body in a kind of ore deposit, comprising:
A) on steel plate of furnace hearth, lay asbestos board, form the asbestos flaggy;
B) establish fire-resistant grain on said asbestos flaggy upper berth, form fire-resistant granulosa;
C) on said fire-resistant granulosa, build refractory brick by laying bricks or stones, form fire brick layer after adopting seat clay to the said refractory brick cementation of fissures;
D) on said fire brick layer, lay ramming mass, the compacting back forms the ramming bed of material;
E) on the said ramming bed of material, build refractory masses by laying bricks or stones.
Preferably, said step d) specifically comprises:
D1) on said fire brick layer, lay ramming mass, the thickness of said ramming mass is 10cm～15cm;
D2) with said ramming mass compacting, the thickness of the ramming mass after the compacting is 8cm～9cm;
D3) repeating step d1)～d2), until obtaining the ramming bed of material.
Preferably, in the said step d), said 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, said 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 said ramming mass.
Compared with prior art; Hot furnace body furnace bottom in ore deposit provided by the invention and the furnace wall that is connected with said furnace bottom, said furnace bottom comprise the asbestos flaggy that is laid on the steel plate of furnace hearth, be layed in fire-resistant granulosa on the said asbestos flaggy, build by laying bricks or stones in the fire brick layer on the said fire-resistant granulosa, be layed in the ramming bed of material on the said fire brick layer and build the refractory masses on the said ramming bed of material by laying bricks or stones.The present invention replaces carbon brick to build the hot furnace body in ore deposit by laying bricks or stones with ramming mass; Ramming mass is to be raw material, to be the diffusing shape material body that the multiple superfine powder additive of bond, admixture is processed with electric smelting cement or compound resin to have high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability with carborundum, graphite, electric calcined anthracite.Ramming mass can form solid integral sintered layer under the situation of high temperature sintering; There is not the slit in this sinter layer; Be difficult for producing the crack when in smelting process, receiving cold and hot alternating action; Can avoid molten iron corrode furnace bottom, with burn-through of furnace hearth, thereby prolonged the hot stove in ore deposit service life, reduced Metal Melting cost, increased the security of the hot stove in ore deposit.In addition, when building the hot furnace body in ore deposit by laying bricks or stones with ramming mass, ramming mass is difficult for and metal generation chemical reaction such as iron, thereby has improved the metallurgical effect of the hot stove in ore deposit.
Description of drawings
The structural representation of the hot furnace body in ore deposit that Fig. 1 provides for the embodiment of the invention.
The specific embodiment
The invention provides the hot furnace body in a kind of ore deposit, comprise furnace bottom and the furnace wall that is connected with said furnace bottom, said furnace bottom comprises:
Be laid in the asbestos flaggy on the steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on the said asbestos flaggy;
Build the fire brick layer on said fire-resistant granulosa by laying bricks or stones, said fire brick layer comprises refractory brick and is filled in the seat clay between the said refractory brick;
Be layed in the ramming bed of material on the said fire brick layer;
Build the refractory masses on the said ramming bed of material by laying bricks or stones.
The present invention replaces carbon brick to build the hot furnace body in ore deposit by laying bricks or stones with ramming mass, has prolonged the service life of the hot stove in ore deposit, has improved the metallurgical effect of the hot stove in ore deposit.
The hot furnace body in said ore deposit comprises furnace bottom and the furnace wall that is connected with said furnace bottom, and in the present invention, said furnace bottom refers to below, metallic solution district, and the furnace wall refers to the side in metallic solution district.
Referring to Fig. 1, the structural representation of the hot furnace body in ore deposit that Fig. 1 provides for the embodiment of the invention, wherein; 1 is steel plate of furnace hearth; 2 for being laid in the asbestos flaggy on the steel plate of furnace hearth 1, and 3 for being layed in the fire-resistant granulosa on the asbestos flaggy 2,4 for build by laying bricks or stones with fire-resistant granulosa 3 on fire brick layer; 5 for being layed in the ramming bed of material on the 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, the hot furnace body in ore deposit is a steel construction, promptly comprises the furnace wall steel plate of steel plate of furnace hearth and ring-type, and steel plate of furnace hearth and the welding of furnace wall steel plate perhaps connect as one through other modes, constitute the shell of the hot stove in ore deposit.
Asbestos flaggy 2 is laid on the steel plate of furnace hearth 1, plays the effect of adiabatic heat-insulation.Fire-resistant granulosa 3 is layed on the asbestos flaggy 2, can be used for filling the slit between asbestos flaggy 2 and the 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 that is incubated and reduces expansive force; Fire brick layer 4 comprises refractory brick and is filled in the seat clay (not illustrating in the drawings) between the said refractory brick that the effect of seat clay is to fill the slit between the refractory brick, forms the fire brick layer of compact structure.The ramming bed of material 5 is layed on the fire brick layer 4, can improve avoid molten iron corrode furnace bottom, with 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 the silicates asbestos board, as applies flexibly alumina silicate etc.
Fire-resistant granulosa 3 is made up of fire-resistant grain, can be silicate granules, like alumina silicate etc.
In the present invention; The ramming bed of material 5 is formed by ramming mass; Said ramming mass is to be raw material, to be the diffusing shape material body that the multiple superfine powder additive of bond, admixture is processed with electric smelting cement or compound resin to have high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability with carborundum, graphite, electric calcined anthracite.Ramming mass can form the integral sintered layer of ceramic-like material under the situation of high temperature sintering; There is not the slit in this sinter layer; Be difficult for producing the crack when in smelting process, receiving cold and hot alternating action; Can avoid molten iron corrode furnace bottom, with burn-through of furnace hearth, thereby prolonged the hot stove in ore deposit service life, reduced Metal Melting cost, increased the security of the hot stove in ore deposit.
In the present invention, said 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 said ramming mass, and its content is preferably 60wt%～95wt%, and more preferably 65wt%～90wt% most preferably is 70wt%～85wt%.
Said ramming mass also comprises CaO, and its content is preferably 3wt%～30wt%, and more preferably 5wt%～25wt% most preferably is 10wt%～20wt%.
Said ramming mass also comprises Fe
2O
3, its content is preferably 2wt%～10wt%, and more preferably 3wt%～7wt% most preferably is 4wt%～6wt%.
Said ramming mass also comprises Al
2O
3, its content preferably is lower than 1wt%, more preferably less than 0.5wt%, most preferably is lower than 0.3wt%.
Said ramming mass also comprises SiO
2, its content preferably is lower than 3wt%, more preferably less than 2.5wt%, most preferably is lower than 2wt%.
Except said components, said ramming mass can also comprise 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 said ramming mass is preferably≤6mm, more preferably≤and 5mm.The granuloplastic ramming bed of material of the ramming mass that granularity is more little is not easy to form the slit more, is not easy to occur the crack, can avoid the phenomenon of molten iron infiltration, burn-through of furnace hearth to take place.
Magnesia brick layer 6 can play the effect of protection wall, guarantees the normal sintering of ramming mass, plays the effect that is incubated and reduces expansive force simultaneously.In the present invention, magnesia brick layer 6 can also be formed by other magnesia refractories.
In the present invention, the hot stove in said ore deposit furnace wall comprises:
Be laid in the asbestos flaggy on the steel plate of furnace wall;
Be layed in the fire-resistant granulosa on the said asbestos flaggy;
Build the fire brick layer on said fire-resistant granulosa by laying bricks or stones, said fire brick layer comprises refractory brick and is filled in the seat clay between the said refractory brick;
Be layed in the ramming bed of material on the said fire brick layer;
Build the refractory masses on the said ramming bed of material by laying bricks or stones.
Hot stove furnace wall, said ore deposit has identical structure with furnace bottom; The asbestos flaggy of furnace wall is connected with the asbestos flaggy of furnace bottom, and the fire brick layer of furnace wall is connected with the fire brick layer of furnace bottom, and 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; Be that asbestos flaggy, fire brick layer, the ramming bed of material and refractory masses all form overall structure, promptly on the body of heater steel plate, lay the asbestos flaggy, establish fire-resistant granulosa on asbestos flaggy upper berth; On fire-resistant granulosa, build fire brick layer by laying bricks or stones, laying the ramming mass layer on the fire brick layer, on the ramming bed of material, building refractory masses by laying bricks or stones; When building fire brick layer by laying bricks or stones, whole fire brick layer is built and formed to furnace bottom fire brick layer and furnace wall fire brick layer simultaneously by laying bricks or stones; When laying the ramming bed of material; The whole ramming bed of material is laid and formed to the furnace bottom ramming bed of material and the furnace wall ramming bed of material simultaneously, and when building refractory masses by laying bricks or stones, whole refractory masses is built and formed to bottom refractory layer and furnace wall refractory layer simultaneously by laying bricks or stones; Simultaneously; Because the top of refractory masses is the metallic solution district, it is the ramming bed of material of matrix that the said furnace bottom ramming bed of material and the said furnace wall ramming bed of material form the cross section, and it is the ramming bed of material of matrix that said bottom refractory layer and said furnace wall refractory layer form the cross section; Make ground, metallic solution district solution both be difficult to seepage, also be difficult to seepage from the side from the below.
The present invention also provides the building method of the hot furnace body in a kind of ore deposit, comprising:
A) on steel plate of furnace hearth, lay asbestos board, form the asbestos flaggy;
B) establish fire-resistant grain on said asbestos flaggy upper berth, form fire-resistant granulosa;
C) on said fire-resistant granulosa, build refractory brick by laying bricks or stones, form fire brick layer after adopting seat clay to the said refractory brick cementation of fissures;
D) on said fire brick layer, lay ramming mass, the compacting back forms the ramming bed of material;
E) on the said ramming bed of material, build refractory masses by laying bricks or stones.
At first on steel plate of furnace hearth, lay asbestos board, form the asbestos flaggy.The present invention does not have specific (special) requirements to said asbestos board, and the asbestos board that satisfies the hot stove adiabatic heat-insulation in ore deposit gets final product, and is preferably the silicates asbestos board, as applies flexibly alumina silicate etc.The present invention does not have particular restriction to said laying method, laying well known to those skilled in the art, bondingly all can.The present invention does not have particular restriction to the thickness of said asbestos flaggy, and the requirement of satisfying the hot stove adiabatic heat-insulation in ore deposit gets final product.
After forming the asbestos flaggy, establish fire-resistant grain on said asbestos flaggy upper berth, form fire-resistant granulosa, said fire-resistant grain can be filled the slit between asbestos flaggy and the fire brick layer, reduces the possibility that molten iron infiltrates.When laying fire-resistant grain, preferably with said fire-resistant granulosa compacting.The present invention does not all have particular restriction to the thickness of said fire-resistant grain and said fire-resistant granulosa.
After forming fire-resistant granulosa, on said fire-resistant granulosa, build refractory brick by laying bricks or stones, form fire brick layer after to the said refractory brick cementation of fissures with seat clay.The present invention preferably adopts herringbone pattern to build refractory brick by laying bricks or stones, build one deck refractory brick by laying bricks or stones after, preferably adopt seat clay to the said refractory brick cementation of fissures, continue to build by laying bricks or stones refractory brick then, continue to carry out the cementation of fissures, until reaching predetermined altitude with seat clay.
When building refractory brick by laying bricks or stones; The circle that upper strata refractory brick forms has different diameters with the circle of lower floor's refractory brick formation; The diameter of a circle that those skilled in the art can form upper strata refractory brick according to the requirement of the hot stove in ore deposit adjusted with the diameter of a circle of lower floor's refractory brick formation, becomes 45 ° or 60 ° like the diameter that can make upper strata refractory brick with the angle of the diameter of lower floor refractory brick.
Hot stove furnace wall burns for fear of the ore deposit, in refractory brick at the bottom of the masonry heater, preferably on furnace wall, lays asbestos board, and with fire-resistant grain tamping is filled in the slit between furnace wall asbestos board and the furnace bottom refractory brick.
The present invention does not have particular restriction to thickness, the material of said refractory brick; Thickness to said fire brick layer does not have particular restriction yet; Those skilled in the art can select the material of refractory brick according to the purposes of the hot stove in ore deposit, and confirm the thickness of fire brick layer according to the requirement of the hot stove of thickness and ore deposit of refractory brick.
In building the process of fire brick layer by laying bricks or stones, use the seat clay cementation of fissures between every layer of refractory brick, reach predetermined altitude after, continue to use the seat clay cementation of fissures, obtain fire brick layer.
After forming fire brick layer, on said fire brick layer, lay ramming mass, form the ramming bed of material, the concrete grammar of said laying ramming mass is following:
D1) on the fire brick layer behind the said cementation of fissures, lay ramming mass, the thickness of said ramming mass is 10cm～15cm;
D2) with said ramming mass compacting, the thickness of the ramming mass after the compacting is 8cm～9cm;
D3) repeating step d1)～d2), until obtaining the ramming bed of material.
At first the even thick ramming mass of place mat 10cm～15cm on the fire brick layer behind the said cementation of fissures is tamped said ramming mass through ramming machine, and the thickness after the compacting is 8cm～9cm.The present invention adopts the insertion depth of iron wire to verify the degree of compacting.After the compacting, continue even place mat ramming mass, continue compacting, repeat above-mentioned steps until the ramming bed of material that forms predetermined thickness.
For avoiding molten iron to the burning and corrode of furnace wall and furnace bottom, the cross section of the said ramming bed of material is a spill, makes furnace bottom and furnace wall that the ramming bed of material all arranged.
In the present invention; Said ramming mass is to be raw material, to be the diffusing shape material body that the multiple superfine powder additive of bond, admixture is processed with electric smelting cement or compound resin to have high-compactness, high strength, high corrosion resistance, high thermal resistance and good volume stability with carborundum, graphite, electric calcined anthracite.Ramming mass can form solid integral sintered layer under the situation of high temperature sintering; There is not the slit in this sinter layer; Be difficult for producing the crack when in smelting process, receiving cold and hot alternating action; Can avoid molten iron corrode furnace bottom, with burn-through of furnace hearth, thereby prolonged the hot stove in ore deposit service life, reduced Metal Melting cost, increased the security of the hot stove in ore deposit.
Said 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 said ramming mass, and its content is preferably 60wt%～95wt%, and more preferably 65wt%～90wt% most preferably is 70wt%～85wt%.
Said ramming mass also comprises CaO, and its content is preferably 3wt%～30wt%, and more preferably 5wt%～25wt% most preferably is 10wt%～20wt%.
Said ramming mass also comprises Fe
2O
3, its content is preferably 2wt%～10wt%, and more preferably 3wt%～7wt% most preferably is 4wt%～6wt%.
Said ramming mass also comprises Al
2O
3, its content preferably is lower than 1wt%, more preferably less than 0.5wt%, most preferably is lower than 0.3wt%.
Said ramming mass also comprises SiO
2, its content preferably is lower than 3wt%, more preferably less than 2.5wt%, most preferably is lower than 2wt%.
Except said components, said ramming mass can also comprise 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 said ramming mass is preferably≤6mm, more preferably≤and 5mm.The granuloplastic ramming bed of material of the ramming mass that granularity is more little is not easy to form the slit more, is not easy to occur the crack, can avoid the phenomenon of molten iron infiltration, burn-through of furnace hearth to take place.
After forming the ramming bed of material, on the said ramming bed of material, build refractory masses by laying bricks or stones, said refractory masses can play the effect of protection wall, guarantees the normal sintering of ramming mass, plays the effect that is incubated and reduces expansive force simultaneously.In the present invention, said refractory masses is preferably the magnesia brick layer.When building refractory masses by laying bricks or stones, build into refractory masses by laying bricks or stones matrix according to the shape of the ramming bed of material.
Build by laying bricks or stones obtain the hot furnace body in ore deposit after; In installing electrodes on the basis of the hot furnace body in said ore deposit, control device, electrode presses and lowering or hoisting gear, hydraulic system, short net, furnace transformer, water-cooling system, smoke evacuation system, dust pelletizing system, on behind feed proportioning system and other electric equipments, can obtain the hot stove in ore deposit.
After obtaining the hot stove in ore deposit, adopt the hot stove in said ore deposit to carry out metal smelt, the result shows, adopts can reach more than 2 years the service life of the hot stove in ore deposit of the hot furnace bottom in ore deposit provided by the invention, has improved the service life of the hot stove in ore deposit greatly.
In order to further specify the present invention, hot stove furnace bottom in ore deposit provided by the invention and building method thereof are described in detail below in conjunction with embodiment.
Embodiment 1
On ground, lay asbestos board, form the asbestos flaggy; Establish fire-resistant grain on said asbestos flaggy upper berth, form fire-resistant granulosa; On said fire-resistant granulosa, build refractory brick by laying bricks or stones, use the seat clay cementation of fissures between every layer of refractory brick, until the fire brick layer that forms predetermined altitude; When building refractory brick by laying bricks or stones, on furnace wall, lay asbestos board, and tamping is filled in the slit between furnace wall asbestos board and the furnace bottom refractory brick with fire-resistant grain; The even thick ramming mass of place mat 12cm on fire brick layer is tamped to 8cm then; The even thicker ramming mass of place mat 12cm is tamped to 8cm, repeats above-mentioned steps to the ramming bed of material that obtains predetermined thickness; After building magnesia brick by laying bricks or stones on the ramming bed of material, obtain the hot stove furnace bottom in ore deposit, wherein again; Ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-85B.
Be the basis with the hot stove furnace bottom in said ore deposit, short net, smoke evacuation system, dust pelletizing system, electrode shell are installed, electrode presses and jacking system, loading and unloading system,, behind hydraulic system and the transformer, can obtain the hot stove in ore deposit shown in Figure 1.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 2 years, and phenomenon does not appear burning in furnace bottom.
Embodiment 2
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-85A.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 18 months, and phenomenon does not appear burning in furnace bottom.
Embodiment 3
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-12A.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 30 months, and phenomenon does not appear burning in furnace bottom.
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-12B.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 2 years, and phenomenon does not appear burning in furnace bottom.
Embodiment 5
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-26A.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 18 months, and phenomenon does not appear burning in furnace bottom.
Embodiment 6
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-26B.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 30 months, and phenomenon does not appear burning in furnace bottom.
Embodiment 7
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is that ramming mass is available from Dashiqiao City red rock refractory material Co., Ltd, and model is HLD-27.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 2 years, and phenomenon does not appear burning in furnace bottom.
Comparative example 1
Adopt the method for embodiment 1 to build the hot stove in ore deposit by laying bricks or stones, difference is, on the fire brick layer behind the cementation of fissures, builds carbon brick by laying bricks or stones, between every layer of carbon brick, uses and fries the good electrode paste cementation of fissures.
Adopt the hot stove in said ore deposit to carry out metal smelt, the result shows that the hot stove in said ore deposit is normal to be used 3 months, and phenomenon appears burning in furnace bottom.
Can know by the foregoing description and comparative example, adopt service life of the hot stove in ore deposit of the hot stove furnace bottom in ore deposit provided by the invention longer, can reduce the metal smelt cost.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the hot furnace body in ore deposit comprises furnace bottom and the furnace wall that is connected with said furnace bottom, and said furnace bottom comprises:
Be laid in the asbestos flaggy on the steel plate of furnace hearth;
Be layed in the fire-resistant granulosa on the said asbestos flaggy;
Build the fire brick layer on said fire-resistant granulosa by laying bricks or stones, said fire brick layer comprises refractory brick and is filled in the seat clay between the said refractory brick;
Be layed in the ramming bed of material on the said fire brick layer;
Build the refractory masses on the said ramming bed of material by laying bricks or stones.
2. the hot furnace body in ore deposit according to claim 1 is characterized in that, the ramming mass in the said 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
3. the hot furnace body in ore deposit according to claim 2 is characterized in that said 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
4. the hot furnace body in ore deposit according to claim 3 is characterized in that the granularity≤6mm of said ramming mass.
5. according to any hot furnace body in described ore deposit of claim 1～4, it is characterized in that said refractory masses is the magnesia brick layer.
6. the building method of the hot furnace body in ore deposit comprises:
A) on steel plate of furnace hearth, lay asbestos board, form the asbestos flaggy;
B) establish fire-resistant grain on said asbestos flaggy upper berth, form fire-resistant granulosa;
C) on said fire-resistant granulosa, build refractory brick by laying bricks or stones, form fire brick layer after adopting seat clay to the said refractory brick cementation of fissures;
D) on said fire brick layer, lay ramming mass, the compacting back forms the ramming bed of material;
E) on the said ramming bed of material, build refractory masses by laying bricks or stones.
7. building method according to claim 6 is characterized in that, said step d) specifically comprises:
D1) on said fire brick layer, lay ramming mass, the thickness of said ramming mass is 10cm～15cm;
D2) with said ramming mass compacting, the thickness of the ramming mass after the compacting is 8cm～9cm;
D3) repeating step d1)～d2), until obtaining the ramming bed of material.
8. building method according to claim 6 is characterized in that, in the said step d), said 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
9. building method according to claim 8 is characterized in that, said 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
10. building method according to claim 9 is characterized in that, the granularity≤6mm of said ramming mass.
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| CN201110278454.1A CN102445080B (en) | 2011-09-19 | 2011-09-19 | Submerged arc furnace body and constructing method thereof |
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| CN201110278454.1A CN102445080B (en) | 2011-09-19 | 2011-09-19 | Submerged arc furnace body and constructing method thereof |
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| CN102445080B CN102445080B (en) | 2015-02-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106288806A (en) * | 2015-05-11 | 2017-01-04 | 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 |
| CN110256056A (en) * | 2019-05-21 | 2019-09-20 | 上海宝钢工业技术服务有限公司 | The titaniferous furnace retaining ramming mass and application method integrally repaired for blast furnace crucibe |
| 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 |
| 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 |
| 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106288806A (en) * | 2015-05-11 | 2017-01-04 | 中国恩菲工程技术有限公司 | Metallurgical furnace |
| 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 |
| CN110256056A (en) * | 2019-05-21 | 2019-09-20 | 上海宝钢工业技术服务有限公司 | The titaniferous furnace retaining ramming mass and application method integrally repaired for blast furnace crucibe |
| 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 |
| 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 |
| 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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