CN108164273A - A kind of ladle draining sand - Google Patents
A kind of ladle draining sand Download PDFInfo
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- CN108164273A CN108164273A CN201711468032.4A CN201711468032A CN108164273A CN 108164273 A CN108164273 A CN 108164273A CN 201711468032 A CN201711468032 A CN 201711468032A CN 108164273 A CN108164273 A CN 108164273A
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/3427—Silicates other than clay, e.g. water glass
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Abstract
The invention discloses a kind of ladle draining sands, belong to metallurgy additive technical field.The ladle draining sand that the present invention develops is to be made of following raw material：During configuration, feed components mixing and ball milling is sieved to get to ladle draining sand for kyanite, bauxite, feldspar, mica powder, charring rice husk material, Al8B4C7, magnesia and saltcake；Wherein charring rice husk powder is after rice husk is mixed with nanometer iron powder, to be transferred to retort, under argon gas guard mode, keeping the temperature 2~4h of charing, continues to heat up, after pyroreaction, cools to room temperature with the furnace, then through pickling, obtained after dry.Gained ladle draining sand of the invention has excellent automatic casting ratio and high temperature resistance.
Description
Technical field
The invention discloses a kind of ladle draining sands, belong to metallurgy additive technical field.
Background technology
Stuffing sand is also known as drainage agent, is a kind of a kind of loose refractory being filled in steel base brick and filling pipe end,
It is put into before converter tapping to prevent molten steel from entering, is released again when pouring steel, play guiding steel stream.Stuffing sand quality it is excellent
The bad height that greatly restrict ladle automatic free-opening rate.High ladle automatic free-opening rate ensures stabilizing continuous casting operating procedure
Steel quality plays a very important role, while is also the important prerequisite item that continuous casting is cast using long nozzle, realization full guard
Part.Ladle is unable to the harm of automatic casting：Some molten steel is understood by unlimited casting, is easily caused secondary oxidation of steel, is influenced to protect
Protect the effect of casting；It will directly rush and be sprinkled upon on the scum layer of tundish due to molten steel cannot be by long nozzle, easily bring slag into steel
Water is simultaneously mingled with into crystallizer formation together, reduces the quality of strand, particularly disadvantageous to the production of high standard variety steel；Oxygen is burnt to draw
Stream operation can generate the personal safety of operating personnel and greatly threaten, and certain damage can be caused to equipment；Entire continuous casting life
The efficiency of producing line can be affected.
With use of the every profession and trade to high-quality structural steel, requirement higher of the people to steel grade quality, in ladle refining process
The middle liquid steel refining time becomes longer, refining temperature becomes higher, and stuffing sand is in the working environment of this harshness, to ladle
Stuffing sand quality proposes requirements at the higher level.Environmental quality is more paid attention to simultaneously, tighter to the supervision of steel mill's pollution problem
Lattice, therefore, environment-friendly type ladle draining sand will gradually become a kind of trend.
For current most of steel mill's ladles using high chromium matter and siliceous two kinds of stuffing sands, chromium matter stuffing sand is expensive and pollutes
Seriously；Siliceous stuffing sand automatic casting ratio is not high, has seriously affected the production efficiency of continuous casting process and the development of high-quality steel grade.
Part steel mill ladle draining sand automatic casting ratio is higher, but its is expensive, and ordinary user is difficult to bear, and constrains China's refining
Technology is fast-developing.Traditional drainage sand is developed higher also there are the problem of automatic casting ratio and bad high temperature resistance at present
Automatic casting ratio, preferable high temperature resistance, pollution-free ladle draining sand are imperative.
Invention content
The present invention solves the technical problem of：It is bad for traditional drainage sand automatic casting ratio and high temperature resistance
Problem provides a kind of ladle draining sand.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of ladle draining sand is made of the raw material of following parts by weight：
10~20 parts of kyanites
8~10 parts of bauxites
10~15 parts of feldspars
8~10 parts of mica powders
8~10 parts of charring rice husk material
10~20 parts of Al8B4C7
8~10 parts of magnesia
10~15 parts of saltcake
The ladle draining sand configuration process is：
（1）It is formed by raw material and weighs each component；
（2）By kyanite, bauxite, feldspar, mica powder, charring rice husk material, Al8B4C7, magnesia, lubricant and saltcake add in ball
In grinding machine, ball milling mixing, sieving obtains ladle draining sand.
The feldspar is any one in andesine, labradorite, bytownite or anorthite.
The mica powder is any one in white mica powder, black clouds female powder or phlogopite powder.
The charring rice husk material preparation process is：After rice husk is mixed with nanometer iron powder, retort is transferred to, is protected with argon gas
Under state, heat preservation 2~4h of charing continues to heat up, and after pyroreaction, cools to room temperature with the furnace, then through pickling, drying must carbonize
Rice husk material.
The magnesia is any one in caustic-calcined magnesite or fused magnesite.
The beneficial effects of the invention are as follows：
（1）Technical solution of the present invention is by adding saltcake, the crystallization water of the saltcake under relatively lower temp in its molecular structure
It can remove, the crystallization water after removing can be reacted with the carbon in charring rice husk powder, generate the gas of reproducibility（CO and H2）, reproducibility
The generation of gas can protect water being avoided to open wide in casting process aoxidize, in addition, the CO gases that part generates can be in hot conditions
Under, it is reacted with C-B-Al compound, generation aluminium oxide, boron oxide and carbon, the aluminium oxide of generation can be anti-with the magnesia in magnesia
Should, magnesium aluminate spinel is formed, and hard sinter layer is collectively formed under the high temperature conditions with feldspar, and the boron oxide generated is in high temperature
It steam raising and contacts to form liquid phase with magnesia under environment, and the substances such as the liquid phase and magnesia have relatively low eutectic point,
So as to form soft heat layer in system hard sintering layer surface, while avoiding hard sinter layer blocked up, stuffing sand is effectively prevented
It floats and infiltration of the molten steel to sinter layer, hard sinter layer is thinned, be conducive to molten steel and break through sinter layer, improve automatic casting
Rate；
（2）The present invention is by adding charring rice husk material, on the one hand, as lubricant, can make in system in mechanical milling process is configured
Each component uniformly mixes in mechanical milling process, on the other hand, as lubricant, molten steel can be contributed to break through in use
Sinter layer improves casting rate, furthermore, carbon source is also used as, under high temperature environment with the reaction of moisture of saltcake volatilization, is generated also
Originality gas moreover, in charing subsequent high temperature reaction process, has partially carbonized silicon wafer that must generate, in system in charring rice husk material
In, required skeleton in hard sinter layer crystallization process can be used as, plays reinforcing sinter layer, improves product high temperature resistance.
Specific embodiment
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 105~110 DEG C, dry rice husk is obtained, and will
Dry rice husk smashes it through 120~160 mesh sieve, obtains powdered rice hulls, and is 50 in mass ratio by gained powdered rice hulls and nanometer iron powder：1
~100：It after 1 is stirred, moves into retort, and argon gas is passed through into stove with 30~60mL/min rates, is protected in argon gas
Under state, 600~700 DEG C are warming up to 8~10 DEG C/min rate programs, after 2~4h of heat preservation charing, continue with 10~15 DEG C/
Min rate programs are warming up to 1500~1550 DEG C, after 45~60min of pyroreaction, under argon gas guard mode, cool to the furnace
Room temperature, discharging, obtains carbonized material, and is 10% mixed in hydrochloric acid by gained carbonized material and mass fraction, 20 are stirred with glass bar~
After 40min, filtering obtains filter cake, and filter cake is washed with deionized until cleaning solution is in neutrality, then the filter cake after washing is transferred to
It is dry to constant weight under the conditions of temperature is 105~110 DEG C in baking oven, obtain charring rice husk material；It counts in parts by weight, in ball mill
In sequentially add 10~20 parts of kyanites, 8~10 parts of bauxites, 10~15 parts of feldspars, 8~10 parts of mica powders, 8~10 parts charing
Rice husk material, 10~20 parts of C-B-Al compounds（Al8B4C7）, 8~10 parts of magnesia and 10~15 parts of saltcake, and by ball material mass ratio
It is 10：1~20：1 adds in zirconium oxide ball milling pearl, is 200~300r/min in revolution rotating speed, rotation rotating speed is 500~600r/
Min is under the conditions of the forward and reverse alternate runs of 30min, 4~6h of ball milling mixing, and discharging obtains ball milling material, then by gained ball milling material mistake
180~200 mesh are sieved to get ladle draining sand.The feldspar is any one in andesine, labradorite, bytownite or anorthite
Kind.The mica powder is any one in white mica powder, black clouds female powder or phlogopite powder.The magnesia is caustic-calcined magnesite or electricity
Any one in fused magnesia.
Example 1
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 20 parts of kyanites, 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charcoals in the ball mill
Change rice husk material, 20 parts of C-B-Al compounds（Al8B4C7）, 10 parts of magnesia and 15 parts of saltcake, and be 20 by ball material mass ratio：1 adds in
Zirconium oxide ball milling pearl is 300r/min in revolution rotating speed, and rotation rotating speed is 600r/min every the forward and reverse alternate run items of 30min
Under part, ball milling mixing 6h, discharging obtains ball milling material, then gained ball milling material is crossed 200 mesh sieve to get ladle draining sand.The feldspar
For andesine.The mica powder is white mica powder.The magnesia is caustic-calcined magnesite.
Example 2
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charring rice husk material, 20 in the ball mill
Part C-B-Al compound（Al8B4C7）, 10 parts of magnesia and 15 parts of saltcake, and be 20 by ball material mass ratio：1 adds in zirconium oxide ball milling
Pearl, in revolution rotating speed be 300r/min, rotation rotating speed for 600r/min under the conditions of the forward and reverse alternate runs of 30min, ball milling
6h is mixed, discharging obtains ball milling material, then gained ball milling material is crossed 200 mesh sieve to get ladle draining sand.The feldspar is andesine.
The mica powder is white mica powder.The magnesia is caustic-calcined magnesite.
Example 3
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 20 parts of kyanites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charring rice husk material, 20 in the ball mill
Part C-B-Al compound（Al8B4C7）, 10 parts of magnesia and 15 parts of saltcake, and be 20 by ball material mass ratio：1 adds in zirconium oxide ball milling
Pearl, in revolution rotating speed be 300r/min, rotation rotating speed for 600r/min under the conditions of the forward and reverse alternate runs of 30min, ball milling
6h is mixed, discharging obtains ball milling material, then gained ball milling material is crossed 200 mesh sieve to get ladle draining sand.The feldspar is andesine.
The mica powder is white mica powder.The magnesia is caustic-calcined magnesite.
Example 4
Count in parts by weight, sequentially add in the ball mill 20 parts of kyanites, 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders,
10 parts of graphite, 20 parts of C-B-Al compounds（Al8B4C7）, 10 parts of magnesia and 15 parts of saltcake, and be 20 by ball material mass ratio：1 adds in
Zirconium oxide ball milling pearl is 300r/min in revolution rotating speed, and rotation rotating speed is 600r/min every the forward and reverse alternate run items of 30min
Under part, ball milling mixing 6h, discharging obtains ball milling material, then gained ball milling material is crossed 200 mesh sieve to get ladle draining sand.The feldspar
For andesine.The mica powder is white mica powder.The magnesia is caustic-calcined magnesite.
Example 5
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 20 parts of kyanites, 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charcoals in the ball mill
Change rice husk material, 10 parts of magnesia and 15 parts of saltcake, and be 20 by ball material mass ratio：1 adds in zirconium oxide ball milling pearl, is in revolution rotating speed
300r/min, rotation rotating speed for 600r/min under the conditions of the forward and reverse alternate runs of 30min, ball milling mixing 6h, discharging, obtain ball
Abrasive material, then gained ball milling material is crossed into 200 mesh sieve to get ladle draining sand.The feldspar is andesine.The mica powder is white clouds
Female powder.The magnesia is caustic-calcined magnesite.
Example 6
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 20 parts of kyanites, 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charcoals in the ball mill
Change rice husk material, 20 parts of C-B-Al compounds（Al8B4C7）With 15 parts of saltcake, and by ball material mass ratio be 20：1 adds in zirconia ball
Grind pearl, in revolution rotating speed be 300r/min, rotation rotating speed for 600r/min under the conditions of the forward and reverse alternate runs of 30min, ball
Mill mixing 6h, discharging obtain ball milling material, then gained ball milling material are crossed 200 mesh sieve to get ladle draining sand.The feldspar is middle length
Stone.The mica powder is white mica powder.
Example 7
Rice husk is put into baking oven, it is dry to constant weight under the conditions of temperature is 110 DEG C, dry rice husk is obtained, and will dry powdered rice hulls
160 mesh sieve is crossed after broken, obtains powdered rice hulls, and is 100 in mass ratio by gained powdered rice hulls and nanometer iron powder：After 1 is stirred, move into
In retort, and argon gas is passed through into stove with 60mL/min rates, under argon gas guard mode, with 10 DEG C/min rate program liters
Temperature after heat preservation charing 4h, continues to be warming up to 1550 DEG C with 15 DEG C/min rate programs to 700 DEG C, after pyroreaction 60min, in
Under argon gas guard mode, room temperature is cooled to the furnace, discharged, obtain carbonized material, and be 10% hydrochloric acid by gained carbonized material and mass fraction
Mixing, after being stirred 40min with glass bar, filtering obtains filter cake, and filter cake is washed with deionized in cleaning solution is in
Property, then the filter cake after washing is transferred in baking oven, it is dry to constant weight under the conditions of being 110 DEG C in temperature, obtain charring rice husk material；It presses
Parts by weight meter sequentially adds 20 parts of kyanites, 10 parts of bauxites, 15 parts of feldspars, 10 parts of mica powders, 10 parts of charcoals in the ball mill
Change rice husk material, 20 parts of C-B-Al compounds（Al8B4C7）, 10 parts of magnesia, and be 20 by ball material mass ratio：1 adds in zirconium oxide ball milling
Pearl, in revolution rotating speed be 300r/min, rotation rotating speed for 600r/min under the conditions of the forward and reverse alternate runs of 30min, ball milling
6h is mixed, discharging obtains ball milling material, then gained ball milling material is crossed 200 mesh sieve to get ladle draining sand.The feldspar is andesine.
The mica powder is white mica powder.The magnesia is caustic-calcined magnesite.
Comparative example：The stuffing sand of Liaoning Refractory Co., ltd production.
1 to 7 gained stuffing sand of example and comparative example product are subjected to performance detection, specific detection method is as follows：
It detects the automatic casting ratio of above-mentioned stuffing sand and the high-temperature pressure-proof performance of 2h is kept the temperature at 1600 DEG C, specific testing result is such as
Shown in table 1：
Table 1：Performance detection table
By 1 testing result of table it is found that present invention gained ladle draining sand has excellent automatic casting ratio and high temperature resistance.
Claims (5)
1. a kind of ladle draining sand, it is characterised in that：It is made of the raw material of following parts by weight：
10~20 parts of kyanites
8~10 parts of bauxites
10~15 parts of feldspars
8~10 parts of mica powders
8~10 parts of charring rice husk material
10~20 parts of Al8B4C7
8~10 parts of magnesia
10~15 parts of saltcake
The ladle draining sand configuration process is：
（1）It is formed by raw material and weighs each component；
（2）By kyanite, bauxite, feldspar, mica powder, charring rice husk material, Al8B4C7, magnesia, lubricant and saltcake add in ball
In grinding machine, ball milling mixing, sieving obtains ladle draining sand.
2. a kind of ladle draining sand according to claim 1, it is characterised in that：The feldspar is andesine, labradorite, training
Any one in feldspar or anorthite.
3. a kind of ladle draining sand according to claim 1, it is characterised in that：The mica powder is white mica powder, black clouds
Any one in female powder or phlogopite powder.
4. a kind of ladle draining sand according to claim 1, it is characterised in that：The charring rice husk material preparation process is：
After rice husk is mixed with nanometer iron powder, retort is transferred to, it is high under argon gas guard mode, keeping the temperature and carbonizing 2~4h, continue to heat up
After temperature reaction, room temperature is cooled to the furnace, then through pickling, drying obtains charring rice husk material.
5. a kind of ladle draining sand according to claim 1, it is characterised in that：The magnesia is caustic-calcined magnesite or electric-melting magnesium
Any one in sand.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108975925A (en) * | 2018-08-09 | 2018-12-11 | 钱兴 | A kind of preparation method of ladle fire resisting air brick |
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| CN1267652A (en) * | 1999-03-23 | 2000-09-27 | 四川省威远特种耐火材料实业公司 | Draining sand |
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