CN104140277A - Method for manufacturing integrated furnace lining for medium-frequency induction heating furnace - Google Patents
Method for manufacturing integrated furnace lining for medium-frequency induction heating furnace Download PDFInfo
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- CN104140277A CN104140277A CN201410371464.3A CN201410371464A CN104140277A CN 104140277 A CN104140277 A CN 104140277A CN 201410371464 A CN201410371464 A CN 201410371464A CN 104140277 A CN104140277 A CN 104140277A
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- induction heating
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Abstract
The invention provides a method for manufacturing an integrated furnace lining for a medium-frequency induction heating furnace. An isostatic pressing process is adopted for forming, the product compactness is good, abrasion resistance is achieved, and the service life is long. The length of a product can be formulated according to needs, the situation that materials are hard to push due to connection and use of other products of short specifications is avoided, and therefore production continuity and high efficiency are guaranteed, and loading and maintenance are convenient. Meanwhile, the additive number of organic addition agents is greatly lowered, the de-waxing process is omitted, the production technology process is simplified, the production period is shortened, and energy consumption is reduced.
Description
Technical field
The invention belongs to metal heat treatment equipment technical field, be specifically related to a kind of preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace.
Background technology
Medium Frequency Induction Heating Furnace furnace lining is applied in metal heat treatmet and metal forging industry, existing furnace lining length is short, several furnace linings pack in metal heat treatment equipment and could use after connecting, because there is gap the junction of two furnace linings, after metal and furnace lining friction, easily in the junction of two furnace linings, fall into metal oxide, cause gap, furnace lining junction excessive, cause heat treated metallic substance to withstand on the edge of furnace lining junction, cause pusher difficulty, affect the production cycle, make automatization and the continuity of producing be difficult to guarantee, be therefore necessary to propose to improve.
Summary of the invention
The technical problem that the present invention solves: the preparation method that a kind of integral type furnace lining for Medium Frequency Induction Heating Furnace is provided, adopt isostatic pressing process moulding, product not only compactness is good, and its length can be worked out as required, avoid the connection of other short specification products use and cause pusher difficult, thereby guarantee continuity and the high efficiency of producing, and greatly reduced the addition of organic additive, omit de-waxing process and shorten with short production cycle.
The technical solution used in the present invention: the preparation method for the integral type furnace lining of Medium Frequency Induction Heating Furnace, comprises the steps:
1) raw material stoving: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin are placed on respectively in the baking oven of 100～120 ℃ and toast 2～3 hours, the systemic moisture of drying material;
2) batching: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin, by the weight ratio batching of 22～26.5:36.5～40:30～35.7:0.8～1.6:0.3～0.75:0.5～1.08, are obtained to mixing raw material;
3) batch mixing: mixing raw material is packed in ball mill and carries out the mixing of 3～4 hours, raw material is mixed;
4) discharging: the raw material mixing is gone out to ball mill;
5) in the raw material mixing, add pan feeding and weigh 5～6% rubble wax, and stirred in whipping device;
6) the above-mentioned mixed powder being stirred is put into baking oven, at the temperature of 100 ± 10 ℃, toast 2～3 hours;
7) granulation of sieving: after baking, powder is crossed to 18 mesh sieves while hot, standby after powder is cooling;
8) cooled powder is packed in forming mould and sealing;
9) forming mould is placed in equal pressing equipment, under the pressure of 100～120MPa, suppresses, powder pressing is become to closely knit base substrate;
10) forming mould is taken out from equal pressing equipment, remove gum cover and plug, core rod and base substrate are contained on lathe, according to size turning base substrate external diameter and the end face of product;
11) core rod and base substrate are taken off from lathe in the lump, take out the core rod in base substrate;
12) base substrate is put into shuttle kiln, be slowly warming up to 1650～1720 ℃ of sintering, be incubated taking-up in 2-4 hour.
Above-mentioned steps 2) in, silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide and kaolinic weight ratio: 24.5:39.2:32.2:1.54:0.68:0.88.
Above-mentioned steps 1) in, the particle diameter of described silicon carbide and white fused alumina is 150～200 microns, and alumina powder, calcium carbonate, silicon oxide and kaolinic particle diameter are 5～50 microns.
Above-mentioned steps 3), in, mixing method is dry ball milling.
Above-mentioned steps 8) in, the core rod of described forming mould is 45# steel, and die sleeve and plug are the quality of rubber materials that elasticity is moderate.
Above-mentioned steps 9), in, pressurize 10～15 minutes, pressurize 2 minutes, pressure release 10～15 minutes.
Above-mentioned steps 12) in, sintering temperature is 1680 ℃, is incubated 3 hours.
The present invention's advantage compared with prior art:
1, adopt isostatic pressing process moulding, product compactness is good, wear-resisting, long service life;
2, the length of product is long, avoids the connection of other short specification product use and cause pusher difficulty, can guarantee continuity and the high efficiency of production, and load easy to maintenance;
3, greatly reduce the addition of organic additive, and omitted de-waxing process, simplified the technological process of production, shortened with short production cyclely, reduced energy consumption.
Embodiment
The preparation method who is used for the integral type furnace lining of Medium Frequency Induction Heating Furnace, comprises the steps:
1) raw material stoving: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin are placed on respectively in the baking oven of 100～120 ℃ and toast 2～3 hours, the systemic moisture of drying material; The particle diameter of described silicon carbide and white fused alumina is 150～200 microns, and alumina powder, calcium carbonate, silicon oxide and kaolinic particle diameter are 5～50 microns.
2) batching: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin, by the weight ratio batching of 22～26.5:36.5～40:30～35.7:0.8～1.6:0.3～0.75:0.5～1.08, are obtained to mixing raw material; Preferred formulations ratio is: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide and kaolinic weight ratio: 24.5:39.2:32.2:1.54:0.68:0.88.
3) batch mixing: mixing raw material is packed in ball mill and carries out the mixing of 3～4 hours, raw material is mixed; Mixing method is dry ball milling
4) discharging: the raw material mixing is gone out to ball mill;
5) in the raw material mixing, add pan feeding and weigh 5～6% rubble wax, and stirred in whipping device;
6) the above-mentioned mixed powder being stirred is put into baking oven, at the temperature of 100 ± 10 ℃, toast 2～3 hours;
7) granulation of sieving: after baking, powder is crossed to 18 mesh sieves while hot, standby after powder is cooling;
8) cooled powder is packed in forming mould and sealing; The core rod of described forming mould is 45# steel, and die sleeve and plug are the quality of rubber materials that elasticity is moderate.
9) forming mould is placed in equal pressing equipment, under the pressure of 100～120MPa, suppresses, powder pressing is become to closely knit base substrate; Pressurize 10～15 minutes, pressurize 2 minutes, pressure release 10～15 minutes.
10) forming mould is taken out from equal pressing equipment, remove gum cover and plug, core rod and base substrate are contained on lathe, according to size turning base substrate external diameter and the end face of product;
11) core rod and base substrate are taken off from lathe in the lump, take out the core rod in base substrate;
12) base substrate is put into shuttle kiln, be slowly warming up to 1650～1720 ℃ of sintering, be incubated taking-up in 2-4 hour, optimal sintering temperature is 1680 ℃, is incubated 3 hours.
The present invention changes traditional hot die-casting molding technique, adopt the technique of new preparation Medium Frequency Induction Heating Furnace furnace lining, only need be by silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin is after totally six kinds of qualified raw material stoving moisture, then according to both certainty ratios, above-mentioned raw materials packed in ball mill and mixes and mix for 3～4 hours, in the raw material mixing, add pan feeding and weigh 5～6% rubble wax, afterwards the raw material that adds rubble wax is added in whipping device and stirred; Again raw material sabot is put into 100 ± 10 ℃ of baking oven bakings 2～3 hours, the wax in batching is melted completely.Again batching is taken out rapidly from baking oven, cross while hot 18 mesh sieve.Powder after sieving is standby after cooling.Then assemble forming mould, the powder preparing is packed in forming mould, after sealing, whole mould is put into the liquid pressure equipment pressurize 2 minutes of 120MPa, after press device pressure release, whole mould is taken out from press device, remove after plug and gum cover, core rod is loaded on lathe and is processed with the base substrate suppressing, the termination of turning base substrate and external diameter, finally take out base substrate from core rod, the base substrate suppressing is put into shuttle kiln, at 1650～1720 ℃ of temperature, burn till, finally complete the processing of whole product.
Above-described embodiment, is preferred embodiment of the present invention, is not used for limiting the scope of the present invention, and the equivalence of being done with content described in the claims in the present invention therefore all changes, within all should being included in the claims in the present invention scope.
Claims (7)
1. for the preparation method of the integral type furnace lining of Medium Frequency Induction Heating Furnace, it is characterized in that comprising the steps:
1) raw material stoving: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin are placed on respectively in the baking oven of 100～120 ℃ and toast 2～3 hours, the systemic moisture of drying material;
2) batching: silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide, kaolin, by the weight ratio batching of 22～26.5:36.5～40:30～35.7:0.8～1.6:0.3～0.75:0.5～1.08, are obtained to mixing raw material;
3) batch mixing: mixing raw material is packed in ball mill and carries out the mixing of 3～4 hours, raw material is mixed;
4) discharging: the raw material mixing is gone out to ball mill;
5) in the raw material mixing, add pan feeding and weigh 5～6% rubble wax, and stirred in whipping device;
6) the above-mentioned mixed powder being stirred is put into baking oven, at the temperature of 100 ± 10 ℃, toast 2～3 hours;
7) granulation of sieving: after baking, powder is crossed to 18 mesh sieves while hot, standby after powder is cooling;
8) cooled powder is packed in forming mould and sealing;
9) forming mould is placed in equal pressing equipment, under the pressure of 100～120MPa, suppresses, powder pressing is become to closely knit base substrate;
10) forming mould is taken out from equal pressing equipment, remove gum cover and plug, core rod and base substrate are contained on lathe, according to size turning base substrate external diameter and the end face of product;
11) core rod and base substrate are taken off from lathe in the lump, take out the core rod in base substrate;
12) base substrate is put into shuttle kiln, be slowly warming up to 1650～1720 ℃ of sintering, be incubated taking-up in 2-4 hour.
2. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, it is characterized in that: above-mentioned steps 2), silicon carbide, white fused alumina, alumina powder, calcium carbonate, silicon oxide and kaolinic weight ratio: 24.5:39.2:32.2:1.54:0.68:0.88.
3. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, it is characterized in that: above-mentioned steps 1), the particle diameter of described silicon carbide and white fused alumina is 150～200 microns, and alumina powder, calcium carbonate, silicon oxide and kaolinic particle diameter are 5～50 microns.
4. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, is characterized in that: above-mentioned steps 3), mixing method is dry ball milling.
5. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, is characterized in that: above-mentioned steps 8), the core rod of described forming mould is 45# steel, and die sleeve and plug are the quality of rubber materials that elasticity is moderate.
6. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, is characterized in that: above-mentioned steps 9), pressurizes 10～15 minutes, and pressurize 2 minutes, pressure release 10～15 minutes.
7. the preparation method of the integral type furnace lining for Medium Frequency Induction Heating Furnace according to claim 1, is characterized in that: above-mentioned steps 12), sintering temperature is 1680 ℃, is incubated 3 hours.
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| CN201410371464.3A CN104140277A (en) | 2014-07-31 | 2014-07-31 | Method for manufacturing integrated furnace lining for medium-frequency induction heating furnace |
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| CN201410371464.3A CN104140277A (en) | 2014-07-31 | 2014-07-31 | Method for manufacturing integrated furnace lining for medium-frequency induction heating furnace |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200382U (en) * | 1986-01-29 | 1987-06-24 | 煤炭工业部煤炭科学研究院唐山分院 | Wearproof and fireproof compound brick |
| JP2003040684A (en) * | 2001-07-30 | 2003-02-13 | Kurosaki Harima Corp | Castable refractory for molten iron |
| CN1597608A (en) * | 2004-07-27 | 2005-03-23 | 西安秦翔科技有限责任公司 | Lining material composition of mains frequency core induction melt furnace |
| CN101045635A (en) * | 2007-03-22 | 2007-10-03 | 武汉科技大学 | Ceramic Al203SiC refractory and preparation method thereof |
| CN101921122A (en) * | 2010-08-17 | 2010-12-22 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
-
2014
- 2014-07-31 CN CN201410371464.3A patent/CN104140277A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200382U (en) * | 1986-01-29 | 1987-06-24 | 煤炭工业部煤炭科学研究院唐山分院 | Wearproof and fireproof compound brick |
| JP2003040684A (en) * | 2001-07-30 | 2003-02-13 | Kurosaki Harima Corp | Castable refractory for molten iron |
| CN1597608A (en) * | 2004-07-27 | 2005-03-23 | 西安秦翔科技有限责任公司 | Lining material composition of mains frequency core induction melt furnace |
| CN101045635A (en) * | 2007-03-22 | 2007-10-03 | 武汉科技大学 | Ceramic Al203SiC refractory and preparation method thereof |
| CN101921122A (en) * | 2010-08-17 | 2010-12-22 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
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Application publication date: 20141112 |