CN111704444A - Corrosion-resistant and anti-scouring refractory material and preparation process thereof - Google Patents
Corrosion-resistant and anti-scouring refractory material and preparation process thereof Download PDFInfo
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- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
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- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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Abstract
The invention discloses a corrosion-resistant and scouring-resistant refractory material and a preparation process thereof, relates to the technical field of refractory materials, and aims to solve the problems that when high-temperature hot air flow is contacted with the refractory material, the hot air flow is sprayed on the refractory material for a long time to scour the refractory material, so that scour channels are formed on the refractory material, the refractory material is damaged, and the service life of the refractory material is shortened. The refractory material body is characterized in that an anti-scouring flow guide arc-shaped groove is formed in the upper end of the refractory material body, the number of the anti-scouring flow guide arc-shaped grooves is three, the three anti-scouring flow guide arc-shaped grooves are sequentially formed in the upper end of the refractory material body, one end of each anti-scouring flow guide arc-shaped groove extends into the refractory material body, anchoring threaded holes are formed in the lower end of the refractory material body, the number of the anchoring threaded holes is two, the two anchoring threaded holes are symmetrically formed about the vertical center line of the refractory material body, and one end of each anchoring threaded hole extends into the refractory material body.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a corrosion-resistant and anti-scouring refractory material and a preparation process thereof.
Background
The refractory material is an inorganic non-metallic material with the refractoriness of not less than 1580 ℃, and the refractoriness is the temperature at which the refractory material cone sample resists high temperature action without softening and melting down under the condition of no load. However, the definition of refractoriness alone does not fully describe the refractory material. The refractory material is applied to various fields of national economy such as steel, nonferrous metals, glass, cement, ceramics, petrifaction, machinery, boilers, light industry, electric power, military industry and the like, is an essential basic material for ensuring the production operation and the technical development of the industries, and plays an irreplaceable important role in the development of high-temperature industrial production. The acid refractory material takes silicon oxide as a main component, and commonly used materials comprise silica bricks and clay bricks; the neutral refractory material takes alumina, chromic oxide or carbon as main components; the basic refractory material takes magnesium oxide and calcium oxide as main components, and commonly used is magnesia brick.
At present, the surface of the prepared refractory material is flat, and in the using process, when high-temperature hot air flow is in contact with the refractory material, the hot air flow is sprayed on the refractory material for a long time to scour the refractory material, so that a scour channel is formed in the refractory material, the refractory material is damaged, the service life of the refractory material is shortened, and the use requirement cannot be met. Therefore, a group of corrosion-resistant, erosion-resistant and refractory materials and a preparation process thereof are urgently needed in the market to solve the problems.
Disclosure of Invention
The invention aims to provide a corrosion-resistant and scouring-resistant refractory material and a preparation process thereof, and aims to solve the problems that when high-temperature hot air is contacted with the refractory material, the hot air is sprayed on the refractory material for a long time to scour the refractory material, so that scour channels are formed in the refractory material, the refractory material is damaged, the service life of the refractory material is shortened, and the use requirement cannot be met.
In order to achieve the purpose, the invention provides the following technical scheme: the corrosion-resistant and anti-scouring refractory material comprises a refractory material body, wherein anti-scouring flow guide arc-shaped grooves are formed in the upper end of the refractory material body, the number of the anti-scouring flow guide arc-shaped grooves is three, the three anti-scouring flow guide arc-shaped grooves are sequentially formed in the upper end of the refractory material body, and one ends of the three anti-scouring flow guide arc-shaped grooves extend to the inside of the refractory material body.
Preferably, the lower end of the refractory material body is provided with two anchoring threaded holes, the two anchoring threaded holes are symmetrically arranged about the vertical center line of the refractory material body, and one ends of the two anchoring threaded holes extend into the refractory material body.
A preparation process of a corrosion-resistant and anti-scouring refractory material comprises the following steps:
step 1: selecting required raw materials, putting the raw materials into a feed hopper, and feeding the raw materials into a crushing box and a grinding box, so that the raw materials are crushed by the crushing box and the grinding box, and the raw materials are converted into dust particles;
step 2: the crushed raw material particles are transferred into a screening machine, a motor of the screening machine is driven, a screening hopper is driven to rotate under the action of the motor of the screening machine, so that the particle material can be driven to centrifugally move, the screening hopper is provided with a screen, the aperture of the screen is 0.1mm, when the raw material particles are contacted with the screen, the raw material particles with the diameter smaller than 0.1mm fall off from the screen under the action of self gravity, the particles with the diameter larger than 0.1mm are intercepted, the upper end of the screening machine is provided with a magnetic net, when the particle material is added into the screening machine, the particle material is contacted with the magnetic net, at the moment, the metal substances in the particle raw material can be adsorbed by the magnetic force of the magnetic net, so that the metal substances are absorbed, the purity of the particle material is improved, and the metal substances contained in the particle material are prevented from being oxidized under the action of high temperature, the preparation quality of the refractory material is reduced;
and step 3: the refractory material is mainly prepared from trivalent oxides of carbon, silicon carbide, aluminum oxide and chromium oxide, wherein the selection ratio of carbon to silicon carbide to aluminum oxide to chromium oxide is 1: 2-3: 7-8: 2, selecting 0.5 part of glass magnesium material in the same proportion;
and 4, step 4: adding selected trivalent oxides such as carbon, silicon carbide, aluminum oxide, chromium oxide and the like into a mulling box, adding a bonding agent into the mulling box, starting a mulling motor, driving the raw materials and the bonding agent to stir under the action of the mulling motor, so as to mix the raw materials and the bonding agent, keeping the temperature inside the mulling box at 50-60 ℃, and mixing the raw materials in the mulling box for 2 hours, so that the raw materials can be fully fused with the bonding agent to obtain a refractory material blank;
and 5: adding a certain amount of refractory material blank into the shaping mold according to the internal capacity of the shaping mold, driving the electric telescopic rod to drive the lower pressing plate to lift, so that the refractory material blank in the shaping mold can be extruded by virtue of the lower pressure of the lower pressing plate, and shaping the refractory material blank;
step 6: putting the extruded refractory material into a drying box, simultaneously starting an electric heater and an air blower, heating the interior of the drying box by virtue of the electric heater so as to improve the temperature of the interior of the drying box, and accelerating the gas flow in the interior of the drying box by virtue of the air blower so as to fully contact hot gas with the refractory material, thereby fully drying the refractory material, wherein the drying time of the refractory material in the drying box is controlled to be 10-12 h, and the temperature in the interior of the drying box is controlled to be 140-160 ℃;
and 7: transferring the dried refractory material into a high-temperature kiln for sintering, wherein the sintering time is controlled to be 40-50 min, and the temperature in the high-temperature kiln is controlled to be 1700-1800 ℃.
Preferably, step 5 when carrying out extrusion, can set up the arc piece at the lower extreme of holding down plate, the quantity of arc piece is selected according to the demand, also can set up anchoring part in the bottom of design mould, and anchoring part's quantity is selected according to the demand, and arc piece and anchoring part extend to the inside of refractory material body under the effect of extrusion to form anti-scour water conservancy diversion arc wall and anchor screw hole at the upper and lower end of refractory material body.
Preferably, the ratio of the amount of the binding agent added in the step 4 to the amount of the alumina added in the mixing box is 2: 1.
compared with the prior art, the invention has the beneficial effects that:
1. according to the device, the anti-scouring flow guide arc-shaped groove is formed in the upper end of the refractory body, so that when high-temperature hot air is sprayed onto the refractory body in the using process, the sprayed high-temperature hot air can be guided by means of the anti-scouring flow guide arc-shaped groove, the movement of the high-temperature hot air in the lateral direction of the refractory body is accelerated, the impact force of the high-temperature hot air on the refractory body in the vertical direction is reduced, the scouring effect of the high-temperature hot air on the refractory body is reduced, and the scouring resistance of the refractory body is indirectly increased.
2. According to the device, the magnetic net is additionally arranged in the screening process, when the crushed raw material particles are injected into the screening machine, the magnetic metal substances contained in the raw material particles can be adsorbed and accumulated on the magnetic net under the action of the magnetic force of the magnetic net, so that the purity of the raw material particles is improved, the metal substances of the prepared refractory material can be prevented from being oxidized under the action of high temperature, and the quality of the prepared refractory material is improved.
3. The refractory material prepared by the method has good thermal stability, and the glass magnesium material can improve the mechanical property of the refractory material and also increase the corrosion resistance of the refractory material to a certain extent.
Drawings
FIG. 1 is a cross-sectional view of a refractory material of the present invention;
FIG. 2 is a flow chart of the preparation process of the present invention.
In the figure: 1. a refractory body; 2. an anti-scouring flow guide arc-shaped groove; 3. and anchoring the threaded hole.
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.
Referring to fig. 1-2, an embodiment of the present invention is shown: the utility model provides a corrosion-resistant anti-scouring refractory material, includes refractory material body 1, and the upper end of refractory material body 1 is provided with anti-scouring water conservancy diversion arc wall 2, and anti-scouring water conservancy diversion arc wall 2 is provided with threely, and three anti-scouring water conservancy diversion arc wall 2 sets gradually in refractory material body 1's upper end, and the one end of three anti-scouring water conservancy diversion arc wall 2 all extends to refractory material body 1's inside. The high-temperature hot air flow can be guided by the anti-scouring guide arc-shaped groove 2, so that the scouring strength of the high-temperature hot air flow on the refractory material body 1 is reduced, and the scouring resistance of the refractory material body 1 is increased.
Further, the lower end of the refractory material body 1 is provided with two anchoring threaded holes 3, the two anchoring threaded holes 3 are symmetrically arranged about the vertical center line of the refractory material body 1, and one ends of the two anchoring threaded holes 3 extend into the refractory material body 1. The refractory material body 1 is convenient to install and fix through the anchoring threaded hole 3.
A preparation process of a corrosion-resistant and anti-scouring refractory material comprises the following steps:
step 1: selecting required raw materials, putting the raw materials into a feed hopper, and feeding the raw materials into a crushing box and a grinding box, so that the raw materials are crushed by the crushing box and the grinding box, and the raw materials are converted into dust particles;
step 2: the crushed raw material particles are transferred into a screening machine, a motor of the screening machine is driven, a screening hopper is driven to rotate under the action of the motor of the screening machine, so that the particle material can be driven to centrifugally move, the screening hopper is provided with a screen, the aperture of the screen is 0.1mm, when the raw material particles are contacted with the screen, the raw material particles with the diameter smaller than 0.1mm fall off from the screen under the action of self gravity, the particles with the diameter larger than 0.1mm are intercepted, the upper end of the screening machine is provided with a magnetic net, when the particle material is added into the screening machine, the particle material is contacted with the magnetic net, at the moment, the metal substances in the particle raw material can be adsorbed by the magnetic force of the magnetic net, so that the metal substances are absorbed, the purity of the particle material is improved, and the metal substances contained in the particle material are prevented from being oxidized under the action of high temperature, the preparation quality of the refractory material is reduced;
and step 3: the refractory material is mainly prepared from trivalent oxides of carbon, silicon carbide, aluminum oxide and chromium oxide, wherein the selection ratio of carbon to silicon carbide to aluminum oxide to chromium oxide is 1: 2-3: 7-8: 2, selecting 0.5 part of glass magnesium material in the same proportion;
and 4, step 4: adding selected trivalent oxides such as carbon, silicon carbide, aluminum oxide, chromium oxide and the like into a mulling box, adding a bonding agent into the mulling box, starting a mulling motor, driving the raw materials and the bonding agent to stir under the action of the mulling motor, so as to mix the raw materials and the bonding agent, keeping the temperature inside the mulling box at 50-60 ℃, and mixing the raw materials in the mulling box for 2 hours, so that the raw materials can be fully fused with the bonding agent to obtain a refractory material blank;
and 5: adding a certain amount of refractory material blank into the shaping mold according to the internal capacity of the shaping mold, driving the electric telescopic rod to drive the lower pressing plate to lift, so that the refractory material blank in the shaping mold can be extruded by virtue of the lower pressure of the lower pressing plate, and shaping the refractory material blank;
step 6: putting the extruded refractory material into a drying box, simultaneously starting an electric heater and an air blower, heating the interior of the drying box by virtue of the electric heater so as to improve the temperature of the interior of the drying box, and accelerating the gas flow in the interior of the drying box by virtue of the air blower so as to fully contact hot gas with the refractory material, thereby fully drying the refractory material, wherein the drying time of the refractory material in the drying box is controlled to be 10-12 h, and the temperature in the interior of the drying box is controlled to be 140-160 ℃;
and 7: transferring the dried refractory material into a high-temperature kiln for sintering, wherein the sintering time is controlled to be 40-50 min, and the temperature in the high-temperature kiln is controlled to be 1700-1800 ℃.
Further, step 5 when carrying out extrusion, can set up the arc piece at the lower extreme of holding down plate, the quantity of arc piece is selected according to the demand, also can set up anchoring part in the bottom of design mould, and anchoring part's quantity is selected according to the demand, and arc piece and anchoring part extend to the inside of refractory material body 1 under the effect of extrusion to form antiscour water conservancy diversion arc wall 2 and anchor screw hole 3 at the upper and lower end of refractory material body 1.
Further, the ratio of the amount of the binder added in the step 4 to the amount of alumina added in the kneading box is 2: 1.
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.
Claims (5)
1. A corrosion-resistant, erosion-resistant refractory material comprising a refractory body (1), characterized in that: the refractory material body is characterized in that an anti-scouring flow guide arc-shaped groove (2) is formed in the upper end of the refractory material body (1), the number of the anti-scouring flow guide arc-shaped grooves (2) is three, the three anti-scouring flow guide arc-shaped grooves (2) are sequentially formed in the upper end of the refractory material body (1), and one end of each anti-scouring flow guide arc-shaped groove (2) extends into the refractory material body (1).
2. A corrosion-resistant, erosion-resistant refractory material according to claim 1, wherein: the lower end of the refractory material body (1) is provided with two anchoring threaded holes (3), the two anchoring threaded holes (3) are symmetrically arranged relative to the vertical center line of the refractory material body (1), and one ends of the two anchoring threaded holes (3) extend into the refractory material body (1).
3. A preparation process of a corrosion-resistant and anti-scouring refractory material is characterized by comprising the following steps: the method comprises the following steps:
step 1: selecting required raw materials, putting the raw materials into a feed hopper, and feeding the raw materials into a crushing box and a grinding box, so that the raw materials are crushed by the crushing box and the grinding box, and the raw materials are converted into dust particles;
step 2: the crushed raw material particles are transferred into a screening machine, a motor of the screening machine is driven, a screening hopper is driven to rotate under the action of the motor of the screening machine, so that the particle material can be driven to centrifugally move, the screening hopper is provided with a screen, the aperture of the screen is 0.1mm, when the raw material particles are contacted with the screen, the raw material particles with the diameter smaller than 0.1mm fall off from the screen under the action of self gravity, the particles with the diameter larger than 0.1mm are intercepted, the upper end of the screening machine is provided with a magnetic net, when the particle material is added into the screening machine, the particle material is contacted with the magnetic net, at the moment, the metal substances in the particle raw material can be adsorbed by the magnetic force of the magnetic net, so that the metal substances are absorbed, the purity of the particle material is improved, and the metal substances contained in the particle material are prevented from being oxidized under the action of high temperature, the preparation quality of the refractory material is reduced;
and step 3: the refractory material is mainly prepared from trivalent oxides of carbon, silicon carbide, aluminum oxide and chromium oxide, wherein the selection ratio of carbon to silicon carbide to aluminum oxide to chromium oxide is 1: 2-3: 7-8: 2, selecting 0.5 part of glass magnesium material in the same proportion;
and 4, step 4: adding selected trivalent oxides such as carbon, silicon carbide, aluminum oxide, chromium oxide and the like into a mulling box, adding a bonding agent into the mulling box, starting a mulling motor, driving the raw materials and the bonding agent to stir under the action of the mulling motor, so as to mix the raw materials and the bonding agent, keeping the temperature inside the mulling box at 50-60 ℃, and mixing the raw materials in the mulling box for 2 hours, so that the raw materials can be fully fused with the bonding agent to obtain a refractory material blank;
and 5: adding a certain amount of refractory material blank into the shaping mold according to the internal capacity of the shaping mold, driving the electric telescopic rod to drive the lower pressing plate to lift, so that the refractory material blank in the shaping mold can be extruded by virtue of the lower pressure of the lower pressing plate, and shaping the refractory material blank;
step 6: putting the extruded refractory material into a drying box, simultaneously starting an electric heater and an air blower, heating the interior of the drying box by virtue of the electric heater so as to improve the temperature of the interior of the drying box, and accelerating the gas flow in the interior of the drying box by virtue of the air blower so as to fully contact hot gas with the refractory material, thereby fully drying the refractory material, wherein the drying time of the refractory material in the drying box is controlled to be 10-12 h, and the temperature in the interior of the drying box is controlled to be 140-160 ℃;
and 7: transferring the dried refractory material into a high-temperature kiln for sintering, wherein the sintering time is controlled to be 40-50 min, and the temperature in the high-temperature kiln is controlled to be 1700-1800 ℃.
4. The process according to claim 3, wherein the refractory material is prepared by the following steps: step 5 when carrying out extrusion, can set up the arc piece at the lower extreme of holding down plate, the quantity of arc piece is selected according to the demand, also can set up anchoring part in the bottom of design mould, and anchoring part's quantity is selected according to the demand, and arc piece and anchoring part extend to the inside of refractory material body (1) under the effect of extrusion to form antiscour water conservancy diversion arc wall (2) and anchor screw hole (3) at the upper and lower end of refractory material body (1).
5. The process according to claim 3, wherein the refractory material is prepared by the following steps: the ratio of the combined dosage added in the step 4 to the addition amount of the alumina in the mixing box is 2: 1.
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| CN202010594792.5A CN111704444A (en) | 2020-06-28 | 2020-06-28 | Corrosion-resistant and anti-scouring refractory material and preparation process thereof |
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| CN201761846U (en) * | 2010-07-02 | 2011-03-16 | 陕西神木化学工业有限公司 | Anti-scour wear-resisting lining plate |
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| CN210753676U (en) * | 2019-07-02 | 2020-06-16 | 湖南超联新材料有限公司 | Multistage screening carborundum powder magnetic separator de-ironing |
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| CN108675810A (en) * | 2018-07-13 | 2018-10-19 | 贵州紫云月华新材料有限公司 | A kind of production method of silica refractory |
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Application publication date: 20200925 |