CN115319034A - Ferrovanadium alloy casting ingot mold and preparation method thereof - Google Patents
Ferrovanadium alloy casting ingot mold and preparation method thereof Download PDFInfo
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- CN115319034A CN115319034A CN202210992251.7A CN202210992251A CN115319034A CN 115319034 A CN115319034 A CN 115319034A CN 202210992251 A CN202210992251 A CN 202210992251A CN 115319034 A CN115319034 A CN 115319034A
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- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910000628 Ferrovanadium Inorganic materials 0.000 title claims abstract description 68
- 238000005266 casting Methods 0.000 title claims abstract description 65
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 51
- 239000000956 alloy Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 38
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 38
- 239000000395 magnesium oxide Substances 0.000 claims description 37
- 239000002893 slag Substances 0.000 claims description 35
- 239000012267 brine Substances 0.000 claims description 25
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 25
- 229910052593 corundum Inorganic materials 0.000 claims description 24
- 239000010431 corundum Substances 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 24
- 238000003723 Smelting Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000011049 filling Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 7
- 239000001095 magnesium carbonate Substances 0.000 claims 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims 1
- 235000014380 magnesium carbonate Nutrition 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 10
- 230000008595 infiltration Effects 0.000 abstract description 6
- 238000001764 infiltration Methods 0.000 abstract description 6
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 238000005275 alloying Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 10
- 229910052720 vanadium Inorganic materials 0.000 description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 238000007133 aluminothermic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/066—Manufacturing, repairing or reinforcing ingot moulds
- B22D7/068—Manufacturing, repairing or reinforcing ingot moulds characterised by the materials used therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to the field of metallurgy, and particularly discloses a ferrovanadium alloy casting ingot mold and a preparation method thereof. According to the invention, the ferrovanadium casting ingot mold is prepared according to different structures and compositions, so that the modularization and standardization preparation of the ingot mold can be realized, the rapid assembly and disassembly of a furnace body can be realized, and the volume error is reduced; the inner bushing of the casting ingot mold is prepared in a modular mode according to a certain composition and proportion, so that the erosion of a furnace lining can be obviously reduced, the alloy infiltration yield can be reduced, and the surface finish of an alloy cake can be improved; the vanadium iron alloy casting ingot mold is functionally classified according to different structures and compositions, so that the filler of the vanadium iron casting ingot mold and the outer lining can be recycled.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a ferrovanadium alloy casting ingot mold and a preparation method thereof.
Background
At present, the ferrovanadium smelting casting ingot mould has less relevant literature data, and the main process comprises dry knotting and wet knotting operation. The dry knotting process is simple to operate, can be used for a reaction vessel in the one-time ferrovanadium smelting process, and in the aluminothermic reaction process, the lining refractory material is sintered at high temperature to form a solid sintered layer. And because a certain amount of brine is added to the wet knotting process for mixing and ramming, the density of the wet knotting process is higher than that of dry knotting, and the wet knotting process can also be used for a vanadium iron preparation process with high calorific value in a short time. By looking at the disclosed related art, the ingot mold knotting process for casting ferrovanadium is less changed at present, and more attention is paid to the structure and function. Patent CN201420410773.2 relates to a pour ingot mould of ferrovanadium, including upper box and the nowel that piles up the setting from top to bottom, nowel upper portion opening, the lower part is sealed, the space of upper box and nowel is the pouring chamber, the utility model discloses an ingot mould of pouring ferrovanadium, its inside heat preservation that is provided with, flame retardant coating and the layer of knoing, can prevent on the one hand that the ingot mould skin from excessively being heated, extension ingot mould life, on the other hand can play the heat preservation effect to the molten iron, make the iron plate slowly solidify, obtain the lower easy broken iron plate of hardness. Patent 201510474486.7 discloses a pouring method of a straight-barrel furnace lining for ferrovanadium smelting, which is characterized in that uniformly mixed pouring materials are directly poured into a straight-barrel furnace shell, the pouring materials are stirred until a furnace bottom pouring material and a furnace side pouring material are compact and flat, baking is carried out after air drying, and knotting treatment is carried out on the furnace lining at the furnace bottom and the furnace side wall after cooling. The method can reduce the use amount of furnace bottom magnesia bricks and magnesia knotting. Patent CN200920177176.9 discloses a FeV50 tapping and casting device by electro-silicothermic process, which is characterized in that a steel shell and a lining refractory material which are integrated with a refining slag tank, a ladle and an ingot mould are adopted, the upper part is large, the lower part is small, a slag outlet and a slag outlet chute are arranged on the half waist, the container is similar to a fine slag tank mould sample, and after smelting and casting, alloy liquid in the ingot mould is cooled for a certain time and then is finished and demoulded into a product. The device is beneficial to reducing refining time in the smelting process and protecting the furnace lining of the furnace body, but the increase of the function of casting the ingot mould can cause the aggravation of the corrosion of the refractory material of the inner lining of the ingot mould and increase the generation amount of the infiltration alloy and the content of the alloy vanadium.
In view of the above-disclosed technology, the currently used cast ingot mold is mainly used as a container and a heat preservation container in the ferrovanadium alloy preparation process. Due to the restriction of the raw materials of the cast ingot mold, the liner erosion and the infiltration of the molten alloy liquid into the inner liner of the ingot mold inevitably occur during the casting cooling process.
Disclosure of Invention
The invention aims to provide a ferrovanadium alloy casting ingot mold and a preparation method thereof, which aim to solve the problem that the prior ferrovanadium alloy preparation process proposed in the background technology mainly adopts the casting ingot mold as a containing container and a heat-preservation container. Due to the restriction of the raw materials of the casting ingot mould, the problems of lining erosion and infiltration of molten alloy liquid to the lining of the ingot mould inevitably occur during the casting cooling process.
In order to achieve the purpose, the invention provides the following technical scheme:
a ferrovanadium alloy casting ingot mold comprises an inner bushing and an outer bushing, wherein a filler is filled between the outer side of the inner bushing and the outer bushing, and a cavity for containing a casting material is formed on the inner side of the inner bushing.
A preparation method of a ferrovanadium alloy casting ingot mold comprises the following steps:
preparing lining slurry from self-made brine and a lining main material;
uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
after the outer sleeve is assembled, the outer sleeve is horizontally placed, the filler with a certain thickness is paved at the bottom of the outer sleeve, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the gap between the inner sleeve and the outer sleeve is filled with the same filler, so that the ferrovanadium alloy casting ingot mold is obtained.
As a still further scheme of the invention: the method for preparing the lining slurry by blending the self-made brine and the lining main material comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
As a still further scheme of the invention: the self-made brine comprises MgCl 2 Solution, mgCl 2 The concentration of the solution is 100-500g/L.
As a still further scheme of the invention: the main material of the lining is corundum slag prepared by smelting magnesia and ferrovanadium, wherein the mass ratio of the magnesia is more than or equal to 50 percent, the purity of the magnesia is more than or equal to 95 percent, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
As a still further scheme of the invention: the ratio of the sleeve wall thickness, the bottom thickness, the inner diameter and the height of the lining sleeve prepared from the lining slurry is (1-3).
As a still further scheme of the invention: the drying temperature of the inner lining is 500-800 ℃, and the baking time is 0.5-2.0h/t.
As a still further scheme of the invention: the outer sheath is one or more layers of fixed shells made of iron sheet coated magnesia bricks, and each layer of shell is fixed by bolts.
As a still further scheme of the invention: the filler is one or two of corundum slag and magnesia generated by smelting ferrovanadium, wherein the purity of the magnesia is more than or equal to 90 percent, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
As a still further scheme of the invention: the filling material filled at the bottom of the outer sleeve, the gap between the inner sleeve and the outer sleeve and the thickness proportion of the bottom of the inner sleeve are 1-2.
Compared with the prior art, the invention has the beneficial effects that:
(1) The ferrovanadium alloy casting ingot mold is prepared according to different structures and compositions, so that the modular and standardized preparation of the ingot mold can be realized, the rapid assembly and disassembly of a furnace body can be realized, and the volume error is reduced;
(2) The inner bushing of the casting ingot mold is prepared in a modular mode according to a certain composition and proportion, so that the erosion of a furnace lining can be obviously reduced, the alloy infiltration yield can be reduced, and the surface finish of an alloy cake can be improved;
(3) The vanadium iron casting ingot mold is functionally classified according to different structures and compositions, so that the filler of the vanadium iron casting ingot mold and the outer lining can be recycled.
Drawings
FIG. 1 is a flow chart of a method for preparing a ferrovanadium cast ingot mold;
FIG. 2 is a raw material composition table of a ferrovanadium casting ingot mold;
FIG. 3 is a schematic structural diagram of a ferrovanadium alloy casting ingot mold.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, a ferrovanadium cast ingot mold includes an inner liner and an outer liner, wherein a filler is filled between an outer side of the inner liner and the outer liner, and a cavity for containing a casting material is formed inside the inner liner.
The preparation method of the ferrovanadium alloy casting ingot mold comprises the following steps:
a. mixing self-made brine and a lining main material to prepare lining slurry;
b. uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
c. after the outer sleeve is assembled, the outer sleeve is horizontally placed, the bottom of the outer sleeve is paved with a certain thickness of filler, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the gap between the inner sleeve and the outer sleeve is filled with the same filler, so that a ferrovanadium alloy casting ingot mold is obtained;
further, in the embodiment of the invention, the method for casting by using the ferrovanadium alloy casting ingot mold comprises the following steps: and pouring the smelted molten slag metal into the cavity of the liner in the ferrovanadium casting ingot mold, and after the casting is finished, transporting the molten slag metal to a cooling area for cooling and then removing the furnace.
In step a of the embodiment of the invention, the method for preparing lining slurry by blending self-made brine and lining main materials comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
Further, the self-made brine comprises MgCl 2 Solution, mgCl 2 The concentration of the solution was 100g/L.
Still further, the main material of the lining is corundum slag prepared by smelting magnesia and ferrovanadium, wherein the mass ratio of the magnesia is 51.5%, the purity of the magnesia is 95.2%, and Al in the corundum slag 2 O 3 The content is 61.3%;
in addition, the grain size of the lining main material is less than or equal to 20 meshes, and the proportion of the lining main material below 100 meshes is 61.5 percent.
In step b of the embodiment of the invention, the ratio of the sleeve thickness, the bottom thickness, the inner diameter and the height of the lining sleeve prepared from the lining slurry is 1.
Furthermore, the drying temperature of the inner lining is 500 ℃, and the baking time is 0.5h/t.
In step c of the embodiment of the invention, the outer sheath is one or more layers of fixed shells made of iron sheet coated magnesia bricks, and each layer of shell is fixed by bolts.
In the step c of the embodiment of the invention, the filler is one or two of corundum slag and magnesia generated by smelting ferrovanadium, wherein the purity of the magnesia is more than or equal to 90 percent, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
Further, the thickness proportion of the filler filled at the bottom of the outer sleeve, the gap between the inner sleeve and the outer sleeve and the bottom of the inner sleeve is 1;
in addition, the grain size of the filling material is less than or equal to 10 meshes.
After the process is carried out, the weight of the alloying on the inner surface of the ingot mould after casting in the ferrovanadium preparation process accounts for 8.3 percent of the output of the single-furnace alloy (equivalent to FeV 50), the average vanadium content of the alloying is 8.7 percent, and the vanadium loss in the actual alloying is 1.44 percent.
Example 2
Referring to fig. 1-3, in an embodiment of the present invention, a ferrovanadium cast ingot mold includes an inner liner and an outer liner, wherein a filler is filled between an outer side of the inner liner and the outer liner, and a cavity for containing a casting material is formed inside the inner liner.
The preparation method of the ferrovanadium alloy casting ingot mold comprises the following steps:
a. mixing self-made brine and a lining main material to prepare lining slurry;
b. uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
c. after the outer sleeve is assembled, the outer sleeve is horizontally placed, the bottom of the outer sleeve is paved with a certain thickness of filler, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the same filler is used for filling a gap between the inner sleeve and the outer sleeve, so that a vanadium iron alloy casting ingot mold is obtained;
further, in the embodiment of the invention, the method for casting by using the ferrovanadium alloy casting ingot mold comprises the following steps: and pouring the smelted molten slag metal into the cavity of the liner in the ferrovanadium casting ingot mold, and after the casting is finished, transporting the molten slag metal to a cooling area for cooling and then removing the furnace.
In step a of the embodiment of the invention, the method for preparing lining slurry by blending self-made brine and lining main materials comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
Further, the self-made brine comprises MgCl 2 Solution, mgCl 2 The concentration of the solution was 300g/L.
Still further, the main material of the lining is corundum slag prepared by smelting magnesia and ferrovanadium, wherein the mass ratio of the magnesia is 72.0%, the purity of the magnesia is 97.1%, and Al in the corundum slag 2 O 3 The content is 68.2 percent;
in addition, the grain size of the lining main material is less than or equal to 20 meshes, and the proportion of the lining main material below 100 meshes is 70.4 percent.
In step b of the embodiment of the present invention, the ratio of the thickness of the sleeve wall, the thickness of the bottom, the inner diameter and the height of the lining sleeve prepared from lining slurry is 1.
Furthermore, the drying temperature of the inner lining is 500 ℃, and the baking time is 0.5h/t.
In step c of the embodiment of the invention, the outer sheath is one or more layers of fixed shells made of iron sheet coated magnesia bricks, and each layer of shell is fixed by bolts.
In step c of the embodiment of the invention, the filler is one or two of corundum slag and magnesia generated by smelting ferrovanadium, wherein the purity of the magnesia is more than or equal to 90%, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
Further, the thickness proportion of the filler filled at the bottom of the outer sleeve, the gap between the inner sleeve and the outer sleeve and the bottom of the inner sleeve is 1;
in addition, the grain size of the filling material is less than or equal to 10 meshes.
After the process is carried out, the weight of the alloying on the inner surface of the ingot mould in the preparation process of the ferrovanadium alloy accounts for 6.1 percent of the output of the single-furnace alloy (equivalent to FeV 50), the average vanadium content of the alloying is 7.5 percent, and the vanadium loss in the actual alloying is 0.92 percent.
Example 3
Referring to fig. 1-3, in an embodiment of the present invention, a ferrovanadium cast ingot mold includes an inner liner and an outer liner, wherein a filler is filled between an outer side of the inner liner and the outer liner, and a cavity for containing a casting material is formed inside the inner liner.
The preparation method of the ferrovanadium alloy casting ingot mold comprises the following steps:
a. preparing lining slurry from self-made brine and a lining main material;
b. uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
c. after the outer sleeve is assembled, the outer sleeve is horizontally placed, the bottom of the outer sleeve is paved with a certain thickness of filler, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the gap between the inner sleeve and the outer sleeve is filled with the same filler, so that a ferrovanadium alloy casting ingot mold is obtained;
further, in the embodiment of the invention, the method for casting by using the ferrovanadium alloy casting ingot mold comprises the following steps: pouring the smelted molten slag gold into the cavity of the liner in the ferrovanadium alloy casting ingot mold, and after casting, transporting to a cooling area to cool, and then removing the furnace.
In step a of the embodiment of the invention, the method for preparing lining slurry by blending self-made brine and lining main materials comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
Further, the self-made brine comprises MgCl 2 Solution, mgCl 2 The concentration of the solution was 300g/L.
Still further, the main material of the lining is corundum slag prepared by smelting magnesia and ferrovanadium, wherein the mass ratio of the magnesia is 72.0%, the purity of the magnesia is 97.1%, and Al in the corundum slag 2 O 3 The content is 68.2%;
in addition, the grain size of the lining main material is less than or equal to 20 meshes, and the proportion of the lining main material below 100 meshes is 70.4 percent.
In step b of the embodiment of the present invention, the ratio of the thickness of the sleeve wall, the thickness of the bottom, the inner diameter and the height of the lining sleeve prepared from lining slurry is 1.
Furthermore, the drying temperature of the inner bushing is 800 ℃, and the baking time is 2.0h/t.
In step c of the embodiment of the invention, the outer sheath is one or more layers of fixed shells made of iron sheet coated magnesia bricks, and each layer of shell is fixed by bolts.
In the step c of the embodiment of the invention, the filler is one or two of corundum slag and magnesia generated by smelting ferrovanadium, wherein the purity of the magnesia is more than or equal to 90 percent, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
Further, the thickness proportion of the filler filled at the bottom of the outer sleeve, the gap between the inner sleeve and the outer sleeve and the bottom of the inner sleeve is 1;
in addition, the grain size of the filling material is less than or equal to 10 meshes.
After the process is carried out, the weight of the alloying on the inner surface of the ingot mould in the preparation process of the ferrovanadium alloy accounts for 4.5 percent of the output of the single-furnace alloy (equivalent to FeV 50), the average vanadium content of the alloying is 5.7 percent, and the vanadium loss in the actual alloying is 0.52 percent.
Example 4
Referring to fig. 1-3, in an embodiment of the present invention, a ferrovanadium cast ingot mold includes an inner liner and an outer liner, wherein a filler is filled between an outer side of the inner liner and the outer liner, and a cavity for containing a casting material is formed inside the inner liner.
The preparation method of the ferrovanadium alloy casting ingot mold comprises the following steps:
a. mixing self-made brine and a lining main material to prepare lining slurry;
b. uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
c. after the outer sleeve is assembled, the outer sleeve is horizontally placed, the bottom of the outer sleeve is paved with a certain thickness of filler, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the gap between the inner sleeve and the outer sleeve is filled with the same filler, so that a ferrovanadium alloy casting ingot mold is obtained;
further, in the embodiment of the invention, the method for casting by using the ferrovanadium alloy casting ingot mold comprises the following steps: and pouring the smelted molten slag metal into the cavity of the liner in the ferrovanadium casting ingot mold, and after the casting is finished, transporting the molten slag metal to a cooling area for cooling and then removing the furnace.
In the step a of the embodiment of the invention, the method for preparing the lining slurry by blending the self-made brine and the lining main material comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
Further, the self-made brine comprises MgCl 2 Solution, mgCl 2 The concentration of the solution was 500g/L.
Further, the main lining material is corundum slag prepared by smelting magnesia and ferrovanadium, wherein the mass ratio of the magnesia is 85.2%, the purity of the magnesia is 97.1%, and Al in the corundum slag 2 O 3 The content is 68.2 percent;
in addition, the grain size of the main material of the lining is less than or equal to 20 meshes, and the proportion of the main material of the lining below 100 meshes is 82.0 percent.
In step b of the embodiment of the present invention, the ratio of the thickness of the sleeve wall, the thickness of the bottom, the inner diameter and the height of the lining sleeve prepared from lining slurry is 1.
Furthermore, the drying temperature of the inner bushing is 800 ℃, and the baking time is 2.0h/t.
In step c of the embodiment of the invention, the outer sheath is one or more layers of fixed shells made of iron sheet coated magnesia bricks, and each layer of shell is fixed by bolts.
In step c of the embodiment of the invention, the filler is one or two of corundum slag and magnesia generated by smelting ferrovanadium, wherein the purity of the magnesia is more than or equal to 90%, and Al in the corundum slag 2 O 3 The content is more than or equal to 60 percent.
Further, the thickness proportion of the filler filled at the bottom of the outer sleeve, the gap between the inner sleeve and the outer sleeve and the bottom of the inner sleeve is 1;
in addition, the grain size of the filling material is less than or equal to 10 meshes.
After the process is carried out, the weight of the alloying on the inner surface of the ingot mould in the preparation process of the ferrovanadium alloy accounts for 3.5 percent of the output of the single-furnace alloy (equivalent to FeV 50), the average vanadium content of the alloying is 4.4 percent, and the vanadium loss in the actual alloying is 0.31 percent.
The beneficial effects of the invention are:
(1) The ferrovanadium casting ingot mold is prepared according to different structures and compositions, so that the modularization and standardization preparation of the ingot mold can be realized, the rapid assembly and disassembly of a furnace body can be realized, and the volume error is reduced;
(2) The inner bushing of the casting ingot mold is prepared in a modular mode according to a certain composition and proportion, so that the erosion of a furnace lining can be obviously reduced, the alloy infiltration yield can be reduced, and the surface finish of an alloy cake can be improved;
(3) The vanadium iron alloy casting ingot mold is functionally classified according to different structures and compositions, so that the filler of the vanadium iron casting ingot mold and the outer lining can be recycled.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (10)
1. The ferrovanadium alloy casting ingot mold is characterized by comprising an inner bushing and an outer sleeve, wherein filler is filled between the outer side of the inner bushing and the outer sleeve, and a cavity for containing casting materials is formed on the inner side of the inner bushing.
2. A method for preparing a ferrovanadium cast ingot mold as claimed in claim 1, comprising the steps of:
mixing self-made brine and a lining main material to prepare lining slurry;
uniformly filling the lining slurry into a lining mold to prepare an inner lining, compacting, drying, and removing the mold for later use;
after the outer sleeve is assembled, the outer sleeve is horizontally placed, the bottom of the outer sleeve is paved with a certain thickness of filler, the dried inner sleeve is placed at the center of the outer sleeve paved with the filler, and the same filler is used for filling a gap between the inner sleeve and the outer sleeve, so that the ferrovanadium alloy casting ingot mold is obtained.
3. The method for preparing the ferrovanadium alloy cast ingot mold according to claim 2, wherein the method for preparing the lining slurry by blending the self-made brine and the lining main material comprises the following steps: mixing the self-made brine with the lining main material according to the mass ratio of 1.
4. The method for preparing a ferrovanadium alloy cast ingot mold as claimed in claim 3, wherein the homemade brine comprises MgCl 2 Solution of said MgCl 2 The concentration of the solution is 100-500g/L。
5. The method for preparing the ferrovanadium alloy cast ingot mold according to claim 3, wherein the main lining material is corundum slag prepared by smelting magnesia and ferrovanadium, the mass ratio of the magnesia is not less than 50%, the purity of the magnesia is not less than 95%, and Al in the corundum slag is not less than 50% 2 O 3 The content is more than or equal to 60 percent.
6. The method for preparing the ferrovanadium alloy cast ingot mold according to claim 2, wherein the ratio of the sleeve wall thickness, the bottom thickness, the inner diameter and the height of the lining sleeve prepared from the lining slurry is 1-3.
7. The method for preparing a ferrovanadium alloy cast ingot mold according to claim 6, wherein the drying temperature of the inner liner is 500 to 800 ℃, and the baking time is 0.5 to 2.0h/t.
8. The method for preparing a ferrovanadium alloy cast ingot mold as claimed in claim 2, wherein the outer sheath is one or more layers of fixed shells made of iron-clad magnesite bricks, and each layer of shell is fixed by bolts.
9. The method for preparing the ferrovanadium alloy casting ingot mold according to claim 8, wherein the filler is one or two of corundum slag and magnesia produced by smelting ferrovanadium, wherein the purity of the magnesia is not less than 90%, and Al in the corundum slag is not less than 90% 2 O 3 The content is more than or equal to 60 percent.
10. The method for preparing a ferrovanadium alloy cast ingot mold according to claim 2, wherein the ratio of the filler filled in the bottom of the outer jacket, the gap between the inner liner and the outer jacket, and the thickness of the bottom of the inner liner is 1-2.
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