CN115464763B - Preparation system and preparation method of long-life high-blowing-through-rate twin air brick core - Google Patents
Preparation system and preparation method of long-life high-blowing-through-rate twin air brick core Download PDFInfo
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- CN115464763B CN115464763B CN202211154859.9A CN202211154859A CN115464763B CN 115464763 B CN115464763 B CN 115464763B CN 202211154859 A CN202211154859 A CN 202211154859A CN 115464763 B CN115464763 B CN 115464763B
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- 239000011449 brick Substances 0.000 title claims abstract description 156
- 238000002360 preparation method Methods 0.000 title claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 155
- 238000003756 stirring Methods 0.000 claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000009826 distribution Methods 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 238000005303 weighing Methods 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims abstract description 22
- 238000010304 firing Methods 0.000 claims abstract description 14
- 238000012423 maintenance Methods 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 42
- 239000002245 particle Substances 0.000 claims description 37
- 238000000465 moulding Methods 0.000 claims description 26
- 238000007790 scraping Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000035939 shock Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 241001408630 Chloroclystis Species 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000000704 physical effect Effects 0.000 description 2
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
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- 239000011261 inert gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
- B28B15/007—Plant with two or more identical shaping or moulding devices
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0422—Weighing predetermined amounts of ingredients, e.g. for consecutive delivery
- B28C7/044—Weighing mechanisms specially adapted therefor; Weighing containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/12—Supplying or proportioning liquid ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention provides a preparation system and a preparation method of a long-life high-blowing-through-rate twin air brick core, wherein the preparation system comprises premixed fine powder stirring equipment, mixing stirring equipment, a feeding port, a storage bin, a bucket elevator, production material stirring equipment, a weighing bucket, quantitative water adding equipment, an automatic material distributing device, a vibrating table, an air brick mold, maintenance equipment, a dryer and firing equipment; the feeding port of the bucket elevator is connected with the feeding port, and the discharging port is connected with the feeding port of the storage bin; the discharge hole of the storage bin is connected with the feed hole of the weighing hopper; the discharge port of the weighing hopper is connected with the feed port of the production material stirring equipment; the water outlet of the quantitative water adding device is connected with the water inlet of the production material stirring device; the discharge port of the production material stirring device is connected with the feed port of the automatic material distributing device; the automatic material distribution device is arranged on the vibration table, and the material outlet is connected with the air brick die. The twins air brick core prepared by the preparation system and the preparation method has the advantages of uniform internal structure, low porosity, good thermal shock stability and high-temperature strength.
Description
Technical Field
The invention belongs to the technical field of smelting, and particularly relates to a preparation system and a preparation method of a long-life high-blowing-through-rate twin air brick core.
Background
The air brick is an important functional air element in the modern steel smelting process, and inert gases such as argon are blown into molten steel through the air brick arranged at the bottom of the steel ladle, so that the purposes of stirring the molten steel, homogenizing alloy components, adjusting the temperature of the molten steel and the like are achieved, and the purpose of smelting the molten steel rapidly is achieved. With the improvement of the quality of steel, the smelting process is more complicated, the dependence and the requirement on the air brick are higher, and the air brick is required to be continuously improved in performance, so that the effects of high blowing-through rate and prolonged service time are achieved. Therefore, twin air bricks are developed at home and abroad, two air brick cores are arranged in one integral brick, one air brick core is firstly used, the other air brick core is switched to use after the air brick core is used to a safe height, or the two air brick cores are alternately used, and the service life of the air brick is 1.5-1.8 times that of a single air brick, so that the purpose of prolonging the service life of the air brick is achieved. As the twin air bricks are almost all built-in integral air bricks, the conditions of changing the air brick core are not provided, and the air brick core is kept in a service state for a longer time, so that the high-temperature performance and stability of the twin air brick core are more rigorous.
However, at present, the situation that a single air brick core is unstable, alarm is given in advance, or the air brick core is switched to another air brick core to have air failure, so that the purpose of prolonging the service life of the twin air brick cannot be achieved, and therefore, how to prolong the service life of the twin air brick core is a problem to be solved at present.
Disclosure of Invention
The invention solves the technical problem of providing a preparation system and a preparation method of a twin air brick core with long service life and high blowing rate.
In order to solve the problems, one aspect of the invention provides a preparation system of a long-life high-blowing-through-rate twin air brick core, which comprises:
the device comprises premixing fine powder stirring equipment, mixing stirring equipment, a feeding port, a storage bin, a bucket elevator, production material stirring equipment, a weighing bucket, quantitative water adding equipment, an automatic distributing device, a vibrating table, an air brick die, maintenance equipment, a dryer and firing equipment;
the premixed fine powder stirring equipment is used for stirring the premixed fine powder raw materials; the mixing stirring equipment is used for stirring the mixture of the particle raw materials and the premixed fine powder raw materials; the feeding port of the bucket elevator is connected with the feeding port, and the discharging port of the bucket elevator is connected with the feeding port of the storage bin; the discharge port of the storage bin is connected with the feed port of the weighing hopper; the discharge port of the weighing hopper is connected with the feed port of the production material stirring equipment; the water outlet of the quantitative water adding device is connected with the water inlet of the production material stirring device; the discharge port of the production material stirring device is connected with the feed port of the automatic material distributing device; the automatic material distribution device is arranged on the vibration table; the discharge port of the automatic distributing device is connected with the feed port of the air brick die; the maintenance equipment is used for maintaining the cast air brick core; the dryer is used for drying the cured air brick core; the firing equipment is used for firing the air brick core after drying.
Preferably, the automatic cloth device comprises:
the material distribution cavity is an open cavity with a large upper part and a small lower part, and a material inlet of the material distribution cavity is connected with a material outlet of the production material stirring equipment;
the inverted V-shaped partition plate is arranged in the distribution cavity, the inverted V-shaped partition plate is arranged along the axial direction of the distribution cavity, two ends of the inverted V-shaped partition plate are connected with the inner walls of the two ends of the distribution cavity, and two side surfaces of the inverted V-shaped partition plate are respectively connected with the opposite inner side walls of the distribution cavity and form a V-shaped distribution cavity;
the material distributing cavity is provided with a material distributing cavity, a plurality of material distributing grooves are formed in the lower portions of two side walls of the material distributing cavity, one end of each material distributing groove is communicated with the corresponding material distributing cavity, the other end of each material distributing groove extends towards the direction close to the air brick die, the material distributing grooves are arranged at intervals along the axial direction of the material distributing cavity, and each material distributing groove corresponds to one air brick die.
Preferably, the automatic distributing device further comprises:
the baffle plate is arranged at one end of the chute, which is close to the air brick die, and is hinged with the side wall of the material distribution cavity;
the hydraulic rod is arranged on the material distribution cavity, the output end of the hydraulic rod is connected with the baffle, and the baffle moves in an opening and closing mode under the action of the hydraulic rod, so that the chute is opened or closed.
Preferably, a U-shaped supporting leg with a downward opening is arranged below the distribution cavity of the automatic distribution device, the bottom of the distribution cavity is connected with the top of the U-shaped supporting leg, and the lower end of the U-shaped supporting leg is detachably connected with the vibrating table.
Preferably, the premixed fine powder stirring equipment and/or the mixing stirring equipment and/or the production material stirring equipment are planetary sand mixers;
the planetary sand mixer comprises a mixing drum; the stirring cylinder is provided with a driving device; an output shaft of the driving device is connected with the main shaft; the main shaft is arranged in the stirring cylinder, and a planetary stirrer is arranged at the bottom end of the main shaft; the main shaft is also provided with a scraping plate mechanism, the scraping plate mechanism comprises a horizontal rod connected with the main shaft, two ends of the horizontal rod are respectively provided with a first vertical rod and a second vertical rod, the bottom end of the first vertical rod is provided with a first scraping plate, the bottom end of the second vertical rod is provided with a second scraping plate, the first scraping plate is a rectangular scraping plate, and the second scraping plate is an L-shaped scraping plate; a circle of nozzles are arranged around the top of the stirring cylinder, and the nozzles are connected with the quantitative water adding equipment.
The invention also provides a preparation method of the long-life high-blowing-rate twin air brick core, which is prepared by adopting the preparation system of the long-life high-blowing-rate twin air brick core and comprises the following steps:
s1, premixing the fine powder raw materials for preparing the air brick core in the premixing fine powder stirring equipment;
s2, mixing the particle raw materials with the particle size of less than 1mm for preparing the air brick core in the mixing stirring equipment, adding the premixed fine powder raw materials for mixing, and adding the particle raw materials with other particle sizes for mixing to obtain a molding production material;
s3, lifting the molding production material to the storage bin by using the bucket elevator, quantitatively releasing the molding production material to the production material stirring equipment by using the weighing bucket, and adding water into the production material stirring equipment by using the quantitative water adding equipment to stir to obtain pug;
s4, releasing the pug into the automatic distributing device by the production stirring equipment, distributing the pug by the automatic distributing device under the action of a vibrating table, and then feeding the pug into the air brick die to finish pouring;
s5, curing the cast air brick core in curing equipment;
s6, drying the air brick core after the maintenance is finished in a dryer;
and S7, sintering the dried air brick core in sintering equipment to obtain the long-service-life high-blowing-rate twin air brick core.
Preferably, when the forming production materials are quantitatively released to the production material stirring equipment through the weighing hopper, the weight error of the forming production materials is controlled within 1 percent;
when water is added into the production material stirring equipment through the quantitative water adding equipment, the weight error of the added water is controlled within 0.5 percent.
Preferably, the blanking speed of the pug fed into the air brick die by the automatic distributing device is 1-5kg/min, and after the air brick die is fully filled with the pug, the long vibration function of the vibration table is closed, and the spot vibration is started for 1-5 minutes.
Preferably, the curing comprises: and curing the cast air brick core in a constant temperature and humidity environment for 12-24 hours in a die, demolding, and continuously curing for 12-24 hours after demolding, wherein the curing environment temperature is 30-40 ℃ and the humidity is 50-60%.
Preferably, the temperature during drying is 200-300 ℃ and the drying time is 20-30 hours;
the sintering temperature is 1500-1600 ℃, and the high temperature holding time is 5-10 hours.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a preparation system and a preparation method of a long-life high-blowing-through-rate twin air brick core, which comprises the following steps: 1. when the air brick core is prepared, the fine powder raw materials are premixed and stirred, then the particle raw materials with the particle size of less than 1mm are mixed, and the mixture is mixed with the premixed fine powder raw materials and the particle raw materials with other particle sizes to obtain a molding production material, and the uniformity of the mixing of the molding production material can be remarkably improved by a mode of pre-mixing and stirring the fine powder. 2. The shaping production material is through bucket elevator automatic feeding to storage silo to release to production material agitated vessel through the scale bucket ration, add water through quantitative water adding equipment in the production material agitated vessel, thereby under automation equipment's auxiliary action, realize automatic feeding, ration feed, ration water adding, make material and water adding amount control more accurate stable, thereby reduce the porosity of adobe. 3. The premixing fine powder stirring equipment, the mixing stirring equipment and the production material stirring equipment are all planetary sand mixers, so that the fine powder, the mixture and the pug are mixed more uniformly under the revolution and rotation actions of stirring blades of the planetary sand mixers, and the segregation of particles and matrixes in the pug is reduced. 4. The mud material after water addition is uniformly and continuously poured into a mold through an automatic material distribution device, and the obtained wet blank particles of the air brick core are uniformly distributed by combining the vibration process of a vibration table, so that the volume stability of the air brick core can be improved, and the influence of local defects on erosion resistance is reduced. 5. And the maintenance environment with constant temperature and humidity ensures that the water in the air brick core is more fully hydrated, and the strength performance of the air brick core is improved. 6. The sintering is carried out in the tunnel kiln, and the temperature gradient in the kiln is continuous, so that the atmosphere is stable, the surface crack rate of the sintered green brick is low, and the thermal shock stability is high.
According to the preparation system and the preparation method of the twin air brick core with long service life and high blowing rate, the automation degree of each process link is high, the influence of manual operation is effectively reduced, the uniformity and the stability of the manufactured air brick core are higher, by using the preparation system, the twin air brick core with uniform internal structure, low porosity, good thermal shock stability and high temperature strength can be obtained, faults are not easy to generate in the use process of the twin air brick, the erosion resistance is high, and the effect of long service life and high blowing rate is achieved.
The invention relates to a preparation system and a preparation method of a long-life high-blowing-through-rate twin air brick core, which mainly comprises the following physical properties: the apparent porosity is 15-17%, the flexural strength is 40-50MPa, the compressive strength is 180-200MPa after heat treatment for 3h at 1550 ℃ and the thermal shock residual retention rate is 40-60% (air cooling for 3 times at 1100 ℃).
Drawings
Fig. 1 is a schematic structural diagram of a system for producing a long-life high-blow-through-rate twin air brick core according to example 1 of the present invention;
FIG. 2 is a schematic structural diagram of a production material stirring device in a system for preparing long-life high-blow-through-rate twin air brick cores according to example 1 of the present invention;
FIG. 3 is a schematic structural diagram of an automatic distributing device in a system for preparing long-life high-blow-through-rate twin air brick cores according to example 1 of the present invention;
fig. 4 is a side view of an automatic distributing device in a system for preparing long-life high-blow-through-rate twin air brick cores according to example 1 of the present invention.
Wherein: 1-a feeding port; 2-a storage bin; 3-bucket elevator; 4-production material stirring equipment; 5-a weighing hopper; 6-quantitative water adding equipment; 7-an automatic material distribution device; 71-a material distribution cavity; 72-inverted V-shaped separator; 73-a chute; 74-material cavity; 75-baffle; 76-hydraulic lever; 77-U-shaped legs; 78-mounting holes; 8-nozzles; 9-an air brick mold; 10-a stirring cylinder; 11-a drive device; 12-a main shaft; 13-planetary stirrer; 14-a first scraper; 15-a second scraper.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the preparation system of the long-life high-blow-through rate twin air brick core in this embodiment:
the device comprises premixing fine powder stirring equipment, mixing stirring equipment, a feeding port 1, a storage bin 2, a bucket elevator 3, production material stirring equipment 4, a weighing bucket 5, quantitative water adding equipment 6, an automatic distributing device 7, a vibrating table, an air brick die 9, curing equipment, a dryer and firing equipment;
wherein the premixed fine powder stirring equipment is used for stirring the premixed fine powder raw materials; the mixing stirring equipment is used for stirring the mixture of the particle raw materials and the premixed fine powder raw materials; the curing equipment is used for curing the air brick core formed by casting; the dryer is used for drying the cured air brick core; the firing equipment is used for firing the dried air brick core.
The feed inlet of the bucket elevator 3 is connected with the feed inlet 1, and the discharge outlet of the bucket elevator 3 is connected with the feed inlet of the storage bin 2; the discharge port of the storage bin 2 is connected with the feed port of the weighing hopper 5; the discharge port of the weighing hopper 5 is connected with the feed port of the production material stirring equipment 4; the water outlet of the quantitative water adding device 6 is connected with the water inlet of the production material stirring device 4; the discharge port of the production material stirring device 4 is connected with the feed port of the automatic material distributing device 7; the automatic material distribution device 7 is arranged on the vibration table; the discharge hole of the automatic distributing device 7 is connected with the feed inlet of the air brick die 9.
In the system for preparing the long-life high-blowing-rate twins air brick core, when the air brick core is prepared, the fine powder raw materials can be premixed and stirred, then the particle raw materials with the particle size of less than 1mm are mixed, and the mixture is mixed with the premixed fine powder raw materials and other particle raw materials with the particle size to obtain a molding production material, and the uniformity of mixing of the molding production material can be remarkably improved in a mode of premixing and stirring the fine powder. Further, personnel pour the shaping production material into feed inlet department, and shaping production material is through bucket elevator automatic feeding to storage silo to release to production material agitated vessel through the weighing hopper ration, add water through quantitative water adding equipment in the production material agitated vessel, thereby under automation equipment's auxiliary effect, realize automatic feeding, ration feed, ration water adding, make material and water adding quantity control more accurate stable, thereby reduce the porosity of adobe. Further, the mud material automatic distribution device after water addition is uniformly and continuously poured in the die, and the obtained wet blank particles of the air brick core are uniformly distributed by combining the vibration process of the vibration table, so that the volume stability of the air brick core can be improved, and the influence of local defects on erosion resistance is reduced. According to the preparation system of the long-life high-blowing-rate twin air brick core, the automation degree of each process link is high, the influence of manual operation is effectively reduced, the uniformity and stability of the manufactured air brick core are higher, by utilizing the preparation system, the twin air brick core with uniform internal structure, low porosity, good thermal shock stability and high-temperature strength can be obtained, faults are not easy to generate in the use process of the twin air brick, the erosion resistance is high, and the long-life high-blowing-rate effect is achieved.
Wherein, this system can include one or multiunit production facility, namely storage silo 2, weighing hopper 5, production material agitated vessel 4, automatic distributing device 7, shaking table are a set of production facility, multiunit production facility connects in parallel, and the feed inlet is carried the material respectively to each production facility through bucket elevator, and the outlet pipe of ration water adding device is connected with the production material agitated vessel 4 of multiunit production facility respectively through the tee bend, and every automatic distributing device 7 corresponds a plurality of air brick moulds. Wherein, if the raw materials adopted in the preparation contain chromium oxide green, a group of production equipment is independently used to prevent the color from being polluted by each other.
The weighing hopper is used for accurately weighing the mixture by a weight reduction method and controlling the mixture by using an electromagnetic valve.
The automatic distributing device is used for pouring pugs into different moulds respectively, and can be realized by adopting the existing distributing mechanism. Considering the characteristics of the pug to be poured in the present application, in order to obtain a better distribution effect, as shown in fig. 3 and 4, a preferred embodiment is: the automatic distributing device 7 includes:
the material distribution cavity 71, wherein the material distribution cavity 71 is an open cavity with a large upper part and a small lower part, and a material inlet of the material distribution cavity 71 is connected with a material outlet of production material stirring equipment;
the inverted V-shaped partition plate 72 is arranged in the distribution cavity 71, the inverted V-shaped partition plate 72 is arranged along the axial direction of the distribution cavity 71, two ends of the inverted V-shaped partition plate 72 are connected with the inner walls of two ends of the distribution cavity 71, and two side surfaces of the inverted V-shaped partition plate 72 are respectively connected with the inner side walls of the opposite distribution cavity 71 to form a V-shaped material cavity 74;
and a plurality of material-sliding grooves 73 arranged at the lower parts of the two side walls of the material distribution cavity 71, wherein one end of each material-sliding groove 73 is communicated with the corresponding material cavity 74, the other end of each material-sliding groove 73 extends towards the direction approaching to the air brick mold 9, the material-sliding grooves 73 are arranged at intervals along the axial direction of the material distribution cavity 71, and each material-sliding groove 73 corresponds to one air brick mold 9.
According to the preparation system of the long-life high-blowing-rate twin air brick core, when the preparation system works, the position of the discharge hole of the chute is opposite to the mounting position of the air brick mold, only the switch button of the vibration table is required to be started, the vibration table vibrates to drive the material distribution cavity to vibrate, and mud materials in the material distribution cavity can enter the air brick mold along the chute, so that the feeding mode of the mold is changed from manual feeding to automatic feeding through the chute; the feeding mode is changed from manual work into automatic, so that the labor intensity of workers is reduced, the working efficiency is improved, and the advancement and the intellectualization of air brick equipment are improved.
Wherein, in the automatic distributing device, a baffle plate can be rotatably arranged on the chute and used as a mechanism for adjusting the outlet size of the chute. The baffle can be a structure for manually adjusting the opening and closing size, and also can be a structure for automatically controlling the opening and closing size.
As a preferred embodiment, the automatic distributing apparatus 7 further includes:
the baffle 75 is arranged at one end of the chute 73 close to the air brick die 9 and is hinged with the side wall of the material distribution cavity 71;
the hydraulic rod 76 is arranged on the material distribution cavity 71, the output end of the hydraulic rod 76 is connected with the baffle plate 75, and the baffle plate 75 opens and closes under the action of the hydraulic rod 76, so that the chute 73 is opened or closed.
In the preparation system of the long-life high-blowing-through-rate twin air brick core, the size of an outlet of a chute can be adjusted through a hydraulic rod control baffle, so that the blanking speed is controlled more conveniently and accurately.
As a preferred embodiment, a U-shaped supporting leg 77 with a downward opening is arranged below the distributing cavity 71 of the automatic distributing device 7, the bottom 71 of the distributing cavity is connected with the top of the U-shaped supporting leg 77, and the lower end of the U-shaped supporting leg 77 is detachably connected with the vibrating table 8. According to the work needs, can be convenient with cloth chamber 71 be connected with the shaking table through U-shaped landing leg 77, realize quick assembly disassembly.
As a preferred embodiment, a plurality of mounting holes 78 are formed on opposite sides of the U-shaped leg 77 at intervals up and down, and the mounting position of the cloth chamber 71 can be conveniently adjusted through the mounting holes 78.
Wherein, the material distribution cavity 71 can be a quadrangular pyramid structure with a large upper part and a small lower part, and the inverted V-shaped partition plate 72 is a triangular prism structure with an inverted V-shaped cross section; the distribution chamber 71 may have a truncated cone structure with a large upper part and a small lower part, and a conical partition plate with an inverted V-shaped longitudinal section may be provided in the distribution chamber 71 of the truncated cone structure. In this embodiment, the distribution chamber 71 adopts a quadrangular pyramid structure with a large upper portion and a small lower portion.
In order to ensure uniformity of mixed materials, as a preferred implementation mode, the premixed fine powder stirring equipment, the mixed material stirring equipment and the production material stirring equipment are all planetary sand mixers, and under the revolution and rotation actions of stirring blades of the planetary sand mixers, fine powder, mixed materials and pug are mixed more uniformly, so that particle and matrix segregation in the pug is reduced.
The planetary sand mixer can be completed by adopting various existing planetary sand mixers. As shown in fig. 2, as a preferred embodiment, the planetary mixer comprises a mixing drum 10, a driving device 11 is arranged on the mixing drum 10, an output shaft of the driving device 11 is connected with a main shaft 12, the main shaft 12 is arranged in the mixing drum 10, a planetary mixer 13 is arranged at the bottom end of the main shaft 12, a scraping mechanism is further arranged on the main shaft 12, the scraping mechanism comprises a horizontal rod connected with the main shaft, a first vertical rod and a second vertical rod are respectively arranged at two ends of the horizontal rod, a first scraping plate 14 is arranged at the bottom end of the first vertical rod, a second scraping plate 15 is arranged at the bottom end of the second vertical rod, the first scraping plate is a rectangular scraping plate, and the second scraping plate is an L-shaped scraping plate; a circle of nozzles 8 are arranged around the top of the stirring cylinder 10, and the nozzles 8 are connected with the quantitative water adding device 6.
In the preparation system of the long-life high-blowing-rate twin air brick core, the scraping plate of the planetary sand mixer is improved into an L shape from a conventional rectangle, so that the mixing efficiency and uniformity can be effectively improved, and the preparation system is more suitable for the property of pug of the application. The top of the planetary sand mixer is provided with a circle of nozzles for spraying water, so that the water adding uniformity of the mixture can be improved.
In order to ensure the maintenance environment, as a preferred implementation mode, the maintenance equipment is a shuttle dryer with a humidifying function, and provides a constant temperature and humidity maintenance environment for the air brick core, so that the muddy water in the air brick core is more sufficient, and the strength performance of the air brick core is improved.
In order to ensure the firing quality of the product, as a preferred embodiment, the firing equipment is a tunnel kiln. The sintering is carried out in the tunnel kiln, and the temperature gradient in the kiln is continuous, so that the atmosphere is stable, the surface crack rate of the sintered green brick is low, and the thermal shock stability is high.
Example 2
The preparation method of the long-life high-blowing-through-rate twin air brick core of the embodiment adopts the preparation system of the long-life high-blowing-through-rate twin air brick core of the embodiment 1, and comprises the following steps:
s1, premixing the fine powder raw materials for preparing the air brick core in the premixing fine powder stirring equipment;
s2, mixing the particle raw materials with the particle size of less than 1mm for preparing the air brick core in the mixing stirring equipment, adding the premixed fine powder raw materials for mixing, and adding the particle raw materials with other particle sizes for mixing to obtain a molding production material;
s3, lifting the molding production material to the storage bin by using the bucket elevator, quantitatively releasing the molding production material to the production material stirring equipment by using the weighing bucket, and adding water into the production material stirring equipment by using the quantitative water adding equipment to stir to obtain pug;
s4, releasing the pug into the automatic distributing device by the production stirring equipment, distributing the pug by the automatic distributing device under the action of a vibrating table, and then feeding the pug into the air brick die to finish pouring;
s5, curing the cast air brick core in curing equipment;
s6, drying the air brick core after the maintenance is finished in a dryer;
and S7, sintering the dried air brick core in sintering equipment to obtain the long-service-life high-blowing-rate twin air brick core.
The preparation method of the long-life high-blowing-through-rate twin air brick core comprises the following steps: 1. the method comprises the steps of premixing and stirring the fine powder raw materials, mixing the particle raw materials with the particle size of less than 1mm, and mixing the particle raw materials with the premixed fine powder raw materials and other particle raw materials with other particle sizes to obtain the molding production material, wherein the uniformity of mixing the molding production material can be remarkably improved through the mode of premixing and stirring the fine powder. 2. The shaping production material is through bucket elevator automatic feeding to storage silo to release to production material agitated vessel through the scale bucket ration, add water through quantitative water adding equipment in the production material agitated vessel, thereby under automation equipment's auxiliary action, realize automatic feeding, ration feed, ration water adding, make material and water adding amount control more accurate stable, thereby reduce the porosity of adobe. 3. The automatic pug distributing device after adding water is uniformly and continuously poured in the die, and the obtained wet blank particles of the air brick core are uniformly distributed by combining the vibration process of the vibration table, so that the volume stability of the air brick core can be improved, and the influence of local defects on erosion resistance is reduced. 4. According to the preparation method, the automation degree of each process link is high, the influence of manual operation is effectively reduced, the uniformity and stability of the manufactured air brick core are higher, by utilizing the preparation system, the twin air brick core with uniform internal structure, low porosity, good thermal shock stability and high-temperature strength can be obtained, faults are not easy to generate in the use process of the twin air brick, the erosion resistance is higher, and the effect of long service life and high blowing through rate is achieved.
As a preferred embodiment, when the forming production materials are quantitatively released to the production material stirring equipment through the weighing hopper, the weight error of the forming production materials is controlled within 1 percent; when water is added into the production material stirring equipment through the quantitative water adding equipment, the weight error of the added water is controlled within 0.5 percent. The porosity of the green bricks can be further reduced by more precisely and stably controlling the materials and the water adding amount.
As a preferable implementation mode, the blanking speed of the mud materials fed into the air brick die through the automatic material distributing device is 1-5kg/min, after the air brick die is filled with the mud materials, the long vibration function of the vibration table is closed, and the point vibration is started for 1-5 minutes.
As a preferred embodiment, the curing comprises: and curing the cast air brick core in a constant temperature and humidity environment for 12-24 hours in a die, demolding, and continuously curing for 12-24 hours after demolding, wherein the curing environment temperature is 30-40 ℃ and the humidity is 50-60%. Under the constant temperature and humidity maintenance environment, the cement in the air brick core is more fully hydrated, and the strength performance is improved.
As a preferred embodiment, the temperature at the time of drying is 200-300 ℃ and the drying time is 20-30 hours.
As a preferred embodiment, the temperature at firing is 1500-1600 ℃ and the high temperature holding time is 5-10 hours.
As a preferred embodiment, the preheating zone temperature in the tunnel kiln is 150-300 ℃, the firing zone temperature is 1500-1600 ℃, and the cooling zone temperature is 300-400 ℃.
Example 3
The embodiment is an example of a specific preparation method of the long-life high-blowing-rate twins air brick core. The preparation raw materials of the long-life high-blowing-through-rate twin air brick core comprise the following components in percentage by mass: 78% of platy corundum, 6% of alpha-alumina micropowder, 4% of cement and 12% of spinel, and the preparation steps are as follows:
s1, premixing fine powder: premixing the fine powder raw materials in a planetary sand mixer for 10 minutes, discharging the fine powder raw materials from equipment after the fine powder raw materials are mixed, and bagging the fine powder raw materials for later use;
s2, mixing: firstly, adding a particle raw material with the particle size of less than 1mm into a planetary sand mixer, adding the premixed fine powder, stirring for 1 minute, finally adding other particle raw materials with the particle size, stirring for 10 minutes, uniformly stirring, and bagging to obtain a molding production material;
s3, adding water and stirring: lifting the molding production materials to a storage bin by using a bucket elevator, quantitatively releasing the molding production materials with a certain weight from the storage bin into a planetary mixer according to the required material amount for molding, controlling the weight error of the molding production materials to be within 1%, setting the required water adding amount for an automatic water adding device, quantitatively spraying and adding water to the molding production material dry materials through 3 spray heads in the planetary mixer, controlling the weight error of the automatic water adding to be within 0.5%, and stirring the molding production materials for 5 minutes under the revolution and autorotation actions of stirring blades of the planetary mixer after the water adding of the molding production materials, so as to obtain uniform pugs with the flow value of 110-130 mm;
s4, molding: placing the air brick core mould on a vibration table, using an electromagnet or a hydraulic arm to fix firmly, and opening a long vibration mode; releasing pug from a discharge hole of a planetary sand mixer to an automatic distributing device, arranging 6 discharge holes on the automatic distributing device, communicating the discharge holes with a die, adjusting the forming blanking speed to 2kg/min by controlling the size of the discharge hole of a chute, closing a long vibration after the die is full, and starting to vibrate for 2 minutes, thereby completing a charging procedure of forming the brick core of the air brick;
s5, curing: curing the cast air brick core in a constant temperature and humidity environment, firstly curing in a mold for 24 hours, demolding, and continuously curing for 24 hours after demolding, wherein the curing environment temperature is 30-40 ℃ and the humidity is 50-60%;
s6, drying: drying the demoulded air brick core in a dryer at 220 ℃ for 24 hours;
s7, sintering: and (3) placing the dried air brick core into a tunnel kiln for sintering, wherein the sintering temperature is 1580 ℃, the high-temperature holding time is 6 hours, and the air brick core with long service life and high blowing rate is obtained after the air brick core is taken out of the tunnel kiln through a preheating zone, a sintering zone and a cooling zone.
Comparative example
The preparation method of the twins air brick core of the comparative example is the same as that of the example 3, and other steps in the preparation method are the same as those of the example 3. The differences are as follows: the processes of automatic feeding, quantitative water adding and automatic distributing device are not adopted, and the feeding, water adding and mud material pouring into the mould are all operated manually.
Physical properties of the twin air brick cores obtained in example 3 and comparative example were measured.
The twins air brick core of example 3 had a apparent porosity of 15.32%, a flexural strength of 47.88MPa, a compressive strength of 182.56MPa, and a thermal shock residual retention of 48.32% (3 times air cooling at 1100 ℃ C.) after heat treatment at 1550 ℃ C. For 3 hours.
The cell permeable brick core of the comparative example has a apparent porosity of 17.54%, a flexural strength of 38.59MPa, a compressive strength of 166.28MPa, and a thermal shock residual retention rate of 38.25% (3 times of air cooling at 1100 ℃ C.) after heat treatment at 1550 ℃ C. For 3 hours.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. A preparation system of long-life high-blowing-through rate twin air brick core is characterized in that:
the device comprises premixing fine powder stirring equipment, mixing stirring equipment, a feeding port, a storage bin, a bucket elevator, production material stirring equipment, a weighing bucket, quantitative water adding equipment, an automatic distributing device, a vibrating table, an air brick die, maintenance equipment, a dryer and firing equipment;
the premixed fine powder stirring equipment is used for stirring the premixed fine powder raw materials; the mixing stirring equipment is used for stirring the mixture of the particle raw materials and the premixed fine powder raw materials; the feeding port of the bucket elevator is connected with the feeding port, and the discharging port of the bucket elevator is connected with the feeding port of the storage bin; the discharge port of the storage bin is connected with the feed port of the weighing hopper; the discharge port of the weighing hopper is connected with the feed port of the production material stirring equipment; the water outlet of the quantitative water adding device is connected with the water inlet of the production material stirring device; the discharge port of the production material stirring device is connected with the feed port of the automatic material distributing device; the automatic material distribution device is arranged on the vibration table; the discharge port of the automatic distributing device is connected with the feed port of the air brick die; the maintenance equipment is used for maintaining the cast air brick core; the dryer is used for drying the cured air brick core; the firing equipment is used for firing the dried air brick core;
the automatic cloth device includes:
the material distribution cavity is an open cavity with a large upper part and a small lower part, and a material inlet of the material distribution cavity is connected with a material outlet of the production material stirring equipment;
the inverted V-shaped partition plate is arranged in the distribution cavity, the inverted V-shaped partition plate is arranged along the axial direction of the distribution cavity, two ends of the inverted V-shaped partition plate are connected with the inner walls of the two ends of the distribution cavity, and two side surfaces of the inverted V-shaped partition plate are respectively connected with the opposite inner side walls of the distribution cavity and form a V-shaped distribution cavity;
the material distributing cavity is provided with a material distributing cavity, a plurality of material distributing grooves are formed in the lower portions of two side walls of the material distributing cavity, one end of each material distributing groove is communicated with the corresponding material distributing cavity, the other end of each material distributing groove extends towards the direction close to the air brick die, the material distributing grooves are arranged at intervals along the axial direction of the material distributing cavity, and each material distributing groove corresponds to one air brick die.
2. The system for preparing long-life high-blow-through rate twin air brick cores according to claim 1, wherein the automatic distributing device further comprises:
the baffle plate is arranged at one end of the chute, which is close to the air brick die, and is hinged with the side wall of the material distribution cavity;
the hydraulic rod is arranged on the material distribution cavity, the output end of the hydraulic rod is connected with the baffle, and the baffle moves in an opening and closing mode under the action of the hydraulic rod, so that the chute is opened or closed.
3. The system for preparing the long-life high-blow-through rate twin air brick core according to claim 1, wherein,
the automatic cloth device is characterized in that a U-shaped supporting leg with a downward opening is arranged below the cloth cavity of the automatic cloth device, the bottom of the cloth cavity is connected with the top of the U-shaped supporting leg, and the lower end of the U-shaped supporting leg is detachably connected with the vibrating table.
4. The system for preparing the long-life high-blow-through rate twin air brick core according to claim 1, wherein the system comprises:
the premixing fine powder stirring equipment and/or the mixing stirring equipment and/or the production material stirring equipment are planetary sand mixers;
the planetary sand mixer comprises a mixing drum; the stirring cylinder is provided with a driving device; an output shaft of the driving device is connected with the main shaft; the main shaft is arranged in the stirring cylinder; the bottom end of the main shaft is provided with a planetary stirrer; the main shaft is also provided with a scraping plate mechanism, the scraping plate mechanism comprises a horizontal rod connected with the main shaft, two ends of the horizontal rod are respectively provided with a first vertical rod and a second vertical rod, the bottom end of the first vertical rod is provided with a first scraping plate, the bottom end of the second vertical rod is provided with a second scraping plate, the first scraping plate is a rectangular scraping plate, and the second scraping plate is an L-shaped scraping plate; a circle of nozzles are arranged around the top of the stirring cylinder, and the nozzles are connected with the quantitative water adding equipment.
5. A method for preparing a long-life high-blowing-rate twin air brick core, which is characterized by adopting the preparation system of the long-life high-blowing-rate twin air brick core as claimed in any one of claims 1-4, comprising the following steps:
s1, premixing the fine powder raw materials for preparing the air brick core in the premixing fine powder stirring equipment;
s2, mixing the particle raw materials with the particle size of less than 1mm for preparing the air brick core in the mixing stirring equipment, adding the premixed fine powder raw materials for mixing, and adding the particle raw materials with other particle sizes for mixing to obtain a molding production material;
s3, lifting the molding production material to the storage bin by using the bucket elevator, quantitatively releasing the molding production material to the production material stirring equipment by using the weighing bucket, and adding water into the production material stirring equipment by using the quantitative water adding equipment to stir to obtain pug;
s4, releasing the pug into the automatic distributing device by the production material stirring equipment, distributing the pug by the automatic distributing device under the action of a vibrating table, and then feeding the pug into the air brick die to finish pouring;
s5, curing the cast air brick core in curing equipment;
s6, drying the air brick core after the maintenance is finished in a dryer;
and S7, sintering the dried air brick core in sintering equipment to obtain the long-service-life high-blowing-rate twin air brick core.
6. The method of manufacturing according to claim 5, wherein:
quantitatively releasing the molding production material to the production material stirring equipment through the weighing hopper, wherein the weight error of the molding production material is controlled within 1%;
when water is added into the production material stirring equipment through the quantitative water adding equipment, the weight error of the added water is controlled within 0.5 percent.
7. The method of manufacturing according to claim 5, wherein:
the blanking speed of the pug fed into the air brick die by the automatic distributing device is 1-5kg/min, after the air brick die is fully filled with the pug, the long vibration function of the vibration table is closed, and the spot vibration is opened for 1-5 minutes.
8. The method of manufacturing according to claim 5, wherein:
the maintenance comprises the following steps: and curing the cast air brick core in a constant temperature and humidity environment for 12-24 hours in a die, demolding, and continuously curing for 12-24 hours after demolding, wherein the curing environment temperature is 30-40 ℃ and the humidity is 50-60%.
9. The method of manufacturing according to claim 5, wherein:
the temperature is 200-300 ℃ during drying, and the drying time is 20-30 hours;
the sintering temperature is 1500-1600 ℃, and the high temperature holding time is 5-10 hours.
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