CN108127092A - A kind of coverture and its preparation process - Google Patents
A kind of coverture and its preparation process Download PDFInfo
- Publication number
- CN108127092A CN108127092A CN201611090644.XA CN201611090644A CN108127092A CN 108127092 A CN108127092 A CN 108127092A CN 201611090644 A CN201611090644 A CN 201611090644A CN 108127092 A CN108127092 A CN 108127092A
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- Prior art keywords
- parts
- coverture
- diatomite
- preparation process
- lime stone
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Classifications
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/005—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using exothermic reaction compositions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of coverture of coverture technical field, the formula of the coverture is as follows：Lime stone：30~60 parts；Diatomite：10~20 parts；Expanded vermiculite：5~10 parts；Expanded graphite：4~7 parts；Exothermic mixture：2~4 parts；Calcirm-fluoride：3~8 parts, the present invention has the characteristics that using expanded vermiculite and expanded graphite compared with highly expanded ability, make coverture that can be unfolded rapidly after ladle is put into, and then achieve the purpose that quickly and effectively to cover molten steel surface, the present invention is after addition expanded vermiculite and expanded graphite, a separation layer can also be formed in the slag blanket of molten steel surface, the heat dissipation capacity of molten steel can effectively be reduced, improve the insulation effect of coverture, add suitable aluminium powder, coke blacking and coal dust are as exothermic mixture, improve the calorific value of coverture, the heat loss of molten steel in ladle is made up using heat caused by the chemical reaction of exothermic mixture.
Description
Technical field
The present invention relates to coverture technical field, specially a kind of coverture and its preparation process.
Background technology
The initial use purpose of thermal-insulating covering agent is very simple, exactly in order to keep the temperature, to prevent molten steel from transporting and pouring into a mould
Temperature declines excessive in the process.But with raising of the people to the quality requirement of steel, the function of molten steel insulation coverture tends to
Diversification and functionalization.It specifically includes：Heat preservation prevents secondary oxidation of the air to molten steel, adsorbs the field trash to float in molten steel.
Meanwhile also require thermal-insulating covering agent that molten steel cannot be made to generate pollution with the element reaction in molten steel or molten steel in itself.
When pouring into a mould carbon aluminium-killed steel and high-alloy steel, the non-gold for how reducing and eliminating the aggregation of molten steel face will necessarily be encountered
The problem of belonging to field trash, if the non-metallic inclusion in tundish molten steel cannot be eliminated in time, necessarily affect the table of strand
Face and subcutaneous quality, to come into operation for this purpose, we have proposed a kind of covertures and its preparation process, to solve the above problems.
Invention content
The purpose of the present invention is to provide a kind of coverture and its preparation processes, mentioned above in the background art to solve
If the non-metallic inclusion in tundish molten steel cannot be eliminated in time, the surface of strand and asking for subcutaneous quality are necessarily affected
Topic.
To achieve the above object, the present invention provides following technical solution：A kind of coverture, the formula of the coverture are as follows：
Lime stone：30~60 parts；
Diatomite：10~20 parts；
Expanded vermiculite：5~10 parts；
Expanded graphite：4~7 parts；
Exothermic mixture：2~4 parts；
Calcirm-fluoride：3~8 parts.
Preferably, the exothermic mixture is the mixture of aluminium powder, coke blacking and coal dust, wherein aluminium powder：Coke blacking：Coal dust=
0.8:1.2:1.9。
A kind of preparation process of coverture, the preparation process of the coverture are as follows：S1：By 30~60 parts
Lime stone and 10~20 parts of diatomite material are sieved, and the lime stone and diatomite for choosing a diameter of 20~30mm are used as system
Standby raw material；
S2：Lime stone after screening and diatomite are put into blender, sequentially add 5~10 parts expanded vermiculite, 4~
In 7 parts of expanded graphite, 2~4 parts of exothermic mixture and 3~8 parts of calcirm-fluoride to blender, powder is sufficiently stirred by blender
It is uniformly mixed it after broken；
S3：By in feedstock transportation to comminutor after fully mixed, by the atomizer being mounted on inside comminutor
Atomized water is generated by high-pressure hydraulic pump, raw material is squirted；
S4：Raw material is agglomerated into corase particles after being contacted with water, controls the rotating speed of granulation disc, and raw material contacts the coarse grain to be formed with water
Son is rotated in granulation disc, squeezes and is brought together, forms graininess semi-finished product；
S5：The graininess semi-finished product prepared in step S4 are handled by heat drying, by its water content control 3~
Between 5%；
S6：Semi-finished product after being dried in step S5 are sieved, choose range conduct of the grain size in 10~15mm
Finished product coverture.
Preferably, in the step S2, the proportioning between lime stone and diatomite is 3:1, the rotating speed of wherein blender is
800~1200r/min, mixing time are 10~15min.
Preferably, in the step S3, the pressure of high-pressure hydraulic pump is controlled between 0.6~0.8MPa.
Preferably, in the step S4, the rotating speed of granulation disc is 700~900r/min, and pass through wind inside comminutor
Machine forms negative pressure.
Preferably, in the step S5, heating temperature is 120~150 DEG C, and 8~12min of continuous heating time.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention has using expanded vermiculite and expanded graphite
The characteristics of compared with highly expanded ability, makes coverture that can be unfolded rapidly, and then reach and quickly and effectively cover after ladle is put into
The purpose of molten steel surface, the present invention can also be formed after addition expanded vermiculite and expanded graphite in the slag blanket of molten steel surface
One separation layer can effectively reduce the heat dissipation capacity of molten steel, improve the insulation effect of coverture, add suitable aluminium powder, coke blacking
With coal dust as exothermic mixture, the calorific value of coverture is improved, steel is made up using heat caused by the chemical reaction of exothermic mixture
The heat loss of molten steel in packet.
Description of the drawings
Fig. 1 is work flow diagram of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
A kind of coverture, the formula of the coverture are as follows：
Lime stone：30 parts；
Diatomite：10 parts；
Expanded vermiculite：5 parts；
Expanded graphite：4 parts；
Exothermic mixture：2 parts, exothermic mixture is the mixture of aluminium powder, coke blacking and coal dust, wherein aluminium powder：Coke blacking：Coal dust=
0.8:1.2:1.9；
Calcirm-fluoride：3~8 parts.
The present invention also provides a kind of preparation process of coverture, the preparation process of the coverture is as follows：
S1：30 parts of lime stone and 10 parts of diatomite material are sieved, the lime stone and diatomite for choosing a diameter of 20mm are made
To prepare raw material；
S2：Lime stone after screening and diatomite are put into blender, sequentially add 5 parts expanded vermiculite, 4 parts swollen
In swollen graphite, 2 parts of exothermic mixture and 3 parts of calcirm-fluoride to blender, by blender be sufficiently stirred crushing after make its mixing
Uniformly, the proportioning between lime stone and diatomite is 3:1, the wherein rotating speed of blender is 800r/min, and mixing time is
10min；
S3：By in feedstock transportation to comminutor after fully mixed, by the atomizer being mounted on inside comminutor
Atomized water is generated by high-pressure hydraulic pump, raw material is squirted, the pressure of high-pressure hydraulic pump is controlled between 0.6MPa；
S4：Raw material is agglomerated into corase particles after being contacted with water, controls the rotating speed of granulation disc, and raw material contacts the coarse grain to be formed with water
Son is rotated in granulation disc, squeezes and is brought together, forms graininess semi-finished product, the rotating speed of granulation disc is 700r/min, and be granulated
Negative pressure is formed by wind turbine inside machine；
S5：The graininess semi-finished product prepared in step S4 are handled by heat drying, by its water content control 3%
Between, heating temperature is 120 DEG C, and continuous heating time 8min；
S6：Semi-finished product after being dried in step S5 are sieved, choose grain size in the range of 10mm as finished product
Coverture.
Embodiment two
A kind of coverture, the formula of the coverture are as follows：
Lime stone：60 parts；
Diatomite：20 parts；
Expanded vermiculite：10 parts；
Expanded graphite：7 parts；
Exothermic mixture：4 parts, exothermic mixture is the mixture of aluminium powder, coke blacking and coal dust, wherein aluminium powder：Coke blacking：Coal dust=
0.8:1.2:1.9；
Calcirm-fluoride：8 parts.
The present invention also provides a kind of preparation process of coverture, the preparation process of the coverture is as follows：
S1：60 parts of lime stone and 20 parts of diatomite material are sieved, the lime stone and diatomite for choosing a diameter of 30mm are made
To prepare raw material；
S2：Lime stone after screening and diatomite are put into blender, sequentially add 10 parts expanded vermiculite, 7 parts
In expanded graphite, 4 parts of exothermic mixture and 8 parts of calcirm-fluoride to blender, by blender be sufficiently stirred crushing after make it mixed
It closes uniformly, the proportioning between lime stone and diatomite is 3:1, the wherein rotating speed of blender is 1200r/min, and mixing time is
15min；
S3：By in feedstock transportation to comminutor after fully mixed, by the atomizer being mounted on inside comminutor
Atomized water is generated by high-pressure hydraulic pump, raw material is squirted, the pressure of high-pressure hydraulic pump is controlled between 0.8MPa；
S4：Raw material is agglomerated into corase particles after being contacted with water, controls the rotating speed of granulation disc, and raw material contacts the coarse grain to be formed with water
Son is rotated in granulation disc, squeezes and is brought together, forms graininess semi-finished product, the rotating speed of granulation disc is 900r/min, and be granulated
Negative pressure is formed by wind turbine inside machine；
S5：The graininess semi-finished product prepared in step S4 are handled by heat drying, by its water content control 5%
Between, heating temperature is 150 DEG C, and continuous heating time 12min；
S6：Semi-finished product after being dried in step S5 are sieved, choose grain size in the range of 15mm as finished product
Coverture.
Embodiment three
A kind of coverture, the formula of the coverture are as follows：
Lime stone：40 parts；
Diatomite：15 parts；
Expanded vermiculite：8 parts；
Expanded graphite：5 parts；
Exothermic mixture：3 parts, exothermic mixture is the mixture of aluminium powder, coke blacking and coal dust, wherein aluminium powder：Coke blacking：Coal dust=
0.8:1.2:1.9；
Calcirm-fluoride：6 parts.
The present invention also provides a kind of preparation process of coverture, the preparation process of the coverture is as follows：
S1：40 parts of lime stone and 15 parts of diatomite material are sieved, the lime stone and diatomite for choosing a diameter of 25mm are made
To prepare raw material；
S2：Lime stone after screening and diatomite are put into blender, sequentially add 8 parts expanded vermiculite, 5 parts swollen
In swollen graphite, 3 parts of exothermic mixture and 6 parts of calcirm-fluoride to blender, by blender be sufficiently stirred crushing after make its mixing
Uniformly, the proportioning between lime stone and diatomite is 3:1, the wherein rotating speed of blender is 1000r/min, and mixing time is
13min；
S3：By in feedstock transportation to comminutor after fully mixed, by the atomizer being mounted on inside comminutor
Atomized water is generated by high-pressure hydraulic pump, raw material is squirted, the pressure of high-pressure hydraulic pump is controlled between 0.7MPa；
S4：Raw material is agglomerated into corase particles after being contacted with water, controls the rotating speed of granulation disc, and raw material contacts the coarse grain to be formed with water
Son is rotated in granulation disc, squeezes and is brought together, forms graininess semi-finished product, the rotating speed of granulation disc is 800r/min, and be granulated
Negative pressure is formed by wind turbine inside machine；
S5：The graininess semi-finished product prepared in step S4 are handled by heat drying, by its water content control 4%
Between, heating temperature is 130 DEG C, and continuous heating time 10min；
S6：Semi-finished product after being dried in step S5 are sieved, choose grain size in the range of 13mm as finished product
Coverture.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of coverture, it is characterised in that：The formula of the coverture is as follows：
Lime stone：30~60 parts；
Diatomite：10~20 parts；
Expanded vermiculite：5~10 parts；
Expanded graphite：4~7 parts；
Exothermic mixture：2~4 parts；
Calcirm-fluoride：3~8 parts.
2. a kind of coverture according to claim 1, it is characterised in that：The exothermic mixture is aluminium powder, coke blacking and coal dust
Mixture, wherein aluminium powder：Coke blacking：Coal dust=0.8:1.2:1.9.
3. a kind of preparation process of coverture：It is characterized in that：The preparation process of the coverture is as follows：
S1：30~60 parts of lime stone and 10~20 parts of diatomite material are sieved, choose a diameter of 20~30mm's
Lime stone and diatomite, which are used as, prepares raw material；
S2：Lime stone after screening and diatomite are put into blender, sequentially add 5~10 parts expanded vermiculite, 4~7 parts
Expanded graphite, in 2~4 parts of exothermic mixture and 3~8 parts of calcirm-fluoride to blender, crushing is sufficiently stirred by blender
After make its be uniformly mixed；
S3：By in feedstock transportation to comminutor after fully mixed, passed through by being mounted on the atomizer inside comminutor
High-pressure hydraulic pump generates atomized water, and raw material is squirted；
S4：Raw material is agglomerated into corase particles after being contacted with water, controls the rotating speed of granulation disc, and raw material contacts the corase particles to be formed with water and exists
It rotates, squeeze and brings together in granulation disc, form graininess semi-finished product；
S5：The graininess semi-finished product prepared in step S4 are handled by heat drying, by its water content control 3~5%
Between；
S6：Semi-finished product after being dried in step S5 are sieved, choose grain size in the range of 10~15mm as finished product
Coverture.
4. a kind of preparation process of coverture according to claim 3, it is characterised in that：In the step S2, lime stone
Proportioning between diatomite is 3:1, the wherein rotating speed of blender is 800~1200r/min, and mixing time is 10~15min.
5. a kind of preparation process of coverture according to claim 3, it is characterised in that：In the step S3, high pressure water
The pressure of pump is controlled between 0.6~0.8MPa.
6. a kind of preparation process of coverture according to claim 3, it is characterised in that：In the step S4, granulation disc
Rotating speed for 700~900r/min, and negative pressure is formed by wind turbine inside comminutor.
7. a kind of preparation process of coverture according to claim 3, it is characterised in that：In the step S5, heating temperature
Spend is 120~150 DEG C, and 8~12min of continuous heating time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090644.XA CN108127092A (en) | 2016-12-01 | 2016-12-01 | A kind of coverture and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090644.XA CN108127092A (en) | 2016-12-01 | 2016-12-01 | A kind of coverture and its preparation process |
Publications (1)
| Publication Number | Publication Date |
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| CN108127092A true CN108127092A (en) | 2018-06-08 |
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ID=62388117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611090644.XA Pending CN108127092A (en) | 2016-12-01 | 2016-12-01 | A kind of coverture and its preparation process |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332608A (en) * | 2018-11-27 | 2019-02-15 | 沈劲松 | Metallurgical industry thermal-insulating covering agent for heat product |
| CN111100967A (en) * | 2020-01-13 | 2020-05-05 | 北京科技大学 | Foaming agent, tundish covering agent and preparation method and application thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01210157A (en) * | 1988-02-15 | 1989-08-23 | Sumitomo Metal Ind Ltd | Method for preventing surface longitudinal crack on continuous cast slab |
| JPH03226341A (en) * | 1990-01-30 | 1991-10-07 | Shinagawa Refract Co Ltd | Exothermic type mold powder for continuous casting |
| CN1759958A (en) * | 2005-03-22 | 2006-04-19 | 浙江湖州红鹰企业集团有限公司 | Heat preservation agent in use for molded casting, and producing technique |
| CN102554141A (en) * | 2012-02-24 | 2012-07-11 | 上海市机械制造工艺研究所有限公司 | Heating covering agent for casting steel piece |
| CN103173591A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Foundry ladle covering agent |
| CN103801666A (en) * | 2014-02-24 | 2014-05-21 | 江苏苏南重工机械科技有限公司 | High-performance heat-preservation covering agent for thick slab and preparing method of high-performance heat-preservation covering agent |
| CN104275447A (en) * | 2014-10-08 | 2015-01-14 | 吴江市液铸液压件铸造有限公司 | Heating covering agent and preparation method thereof |
| CN104308106A (en) * | 2014-10-08 | 2015-01-28 | 吴江市液铸液压件铸造有限公司 | Steel ladle covering agent |
-
2016
- 2016-12-01 CN CN201611090644.XA patent/CN108127092A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01210157A (en) * | 1988-02-15 | 1989-08-23 | Sumitomo Metal Ind Ltd | Method for preventing surface longitudinal crack on continuous cast slab |
| JPH03226341A (en) * | 1990-01-30 | 1991-10-07 | Shinagawa Refract Co Ltd | Exothermic type mold powder for continuous casting |
| CN1759958A (en) * | 2005-03-22 | 2006-04-19 | 浙江湖州红鹰企业集团有限公司 | Heat preservation agent in use for molded casting, and producing technique |
| CN102554141A (en) * | 2012-02-24 | 2012-07-11 | 上海市机械制造工艺研究所有限公司 | Heating covering agent for casting steel piece |
| CN103173591A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Foundry ladle covering agent |
| CN103801666A (en) * | 2014-02-24 | 2014-05-21 | 江苏苏南重工机械科技有限公司 | High-performance heat-preservation covering agent for thick slab and preparing method of high-performance heat-preservation covering agent |
| CN104275447A (en) * | 2014-10-08 | 2015-01-14 | 吴江市液铸液压件铸造有限公司 | Heating covering agent and preparation method thereof |
| CN104308106A (en) * | 2014-10-08 | 2015-01-28 | 吴江市液铸液压件铸造有限公司 | Steel ladle covering agent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332608A (en) * | 2018-11-27 | 2019-02-15 | 沈劲松 | Metallurgical industry thermal-insulating covering agent for heat product |
| CN111100967A (en) * | 2020-01-13 | 2020-05-05 | 北京科技大学 | Foaming agent, tundish covering agent and preparation method and application thereof |
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