CN1098130C - Grcular particles of insulating agent for molten steel and its preparing process - Google Patents
Grcular particles of insulating agent for molten steel and its preparing process Download PDFInfo
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- CN1098130C CN1098130C CN00110748A CN00110748A CN1098130C CN 1098130 C CN1098130 C CN 1098130C CN 00110748 A CN00110748 A CN 00110748A CN 00110748 A CN00110748 A CN 00110748A CN 1098130 C CN1098130 C CN 1098130C
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- molten steel
- lime
- heat preserving
- preserving agent
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- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to a circular granular insulating agent and a preparing method thereof, wherein the agent is used for molten steel for a ladle and uses charred rice husks as basic materials. The agent is characterized in that fly ash, expandable graphite or vermiculite, lime and calcined dolomite powder are regarded as stuffing (the lime and the calcined dolomite powder have the function of gelatification). The components are mixed according to certain proportions, and water is added to the components. Then, the mixture is mixed, stirred, molded, dried and screened into circular particles with granularity of 0.2 to 1.2mm and is packaged into a finished product. The agent is the novel circular granular insulating agent for molten steel, has the advantages of reasonable shape, light weight, good spreadability, good insulation effect, low cost and no environment pollution. The ladle can not be stuck.
Description
Technical field
The present invention relates to a kind of heat preserving agent for liquid steel and manufacture method thereof, especially be widely used in the ladle, is the rounded grain heat preserving agent for liquid steel and the manufacture method thereof of base-material with the charring rice husk.
Background technology
In the prior art, have with flyash (power plant's flue dust) is the heat preserving agent for liquid steel of the irregularly shaped particles of base-material manufacturing, because of base-material than great, when the heat preserving agent of producing is poured in molten steel, molten steel is splashed, pollute operating environment and dangerous, heat preserving agent is irregular particle, and motility is poor, and spreadability is bad, easily produce ladle and be stained with the slag phenomenon, please referring to Chinese patent application: application number 91106922 and 96117597.
Also useful charring rice husk is the heat preserving agent for liquid steel of base-material manufacturing or is heat preserving agent for liquid steel with charring rice husk directly; it is shaped as irregular particle or Powdered; Pei Fang defective in addition, make it to exist that dust flies upward, contaminate environment, be tied up with, problem such as spreadability difference, anxious to be solved.
Summary of the invention
In view of the problems referred to above that exist, the objective of the invention is to study a kind of shape reasonable, in light weight, be not tied up with, free from environmental pollution, spreadability good, high insulating effect, heat preserving agent for liquid steel and manufacture method thereof that cost is low.
For realizing purpose of the present invention, the technical measures of taking are: make a kind of heat preserving agent for liquid steel, with the charring rice husk is base-material, it is characterized in that it is is filler with flyash, expanded graphite or vermiculite, with lime, calcined dolomite in powder not only is filler but also be jelling agent, each component is prepared burden by a certain percentage and is added water mixing, stirring, must be shaped to circular granular, the prescription of each component is (weight percentage): charring rice husk 50-85%, flyash 5-30%, expanded graphite or vermiculite 1-20%, lime 2-20%, calcined dolomite in powder 2-20% adds water 20%.For making rounded grain heat preserving agent for liquid steel of the present invention, develop a kind of manufacture method, comprise operations such as batching, mixing, stirring, moulding, drying, screening, it is characterized in that each component prepares material by above-mentioned prescription, mix, stir, churning time is 5-10 minute, send into the disc type shaper then, with 50-80 rev/min rotating speed,, be shaped to circular granular through 10-16 minute, enter horizontal cylinder hot air dryer again, under 200-300 ℃ of temperature dry 15-25 minute, rescreen and be divided into the particle that granularity is 2-12mm, the packing back is a finished product.
After having taked abovementioned technology, produce following positively effect: cost is low, high insulating effect, circular granular and in light weight, do not have when pouring molten steel into molten steel splash and dust fly upward, created the good working environment, free from environmental pollution and safety does not have the phenomenon of being tied up with, and spreadability is good, can cover molten steel rapidly comprehensively, receive praises from customers.
Description of drawings
Accompanying drawing is the manufacturing process flow diagram of rounded grain heat preserving agent for liquid steel of the present invention
Embodiment
Introduce content of the present invention in detail below in conjunction with drawings and Examples:
In the accompanying drawing, technical process is: mix, stirring, moulding, drying, screening, packing, finished product.
The charring rice husk that rounded grain heat preserving agent for liquid steel of the present invention is and good heat insulating low with cost is a base-material, because its proportion is little, the heat preserving agent of producing is in light weight, not having molten steel when pouring molten steel into splashes, created the good working environment, simultaneously, because of heat preserving agent does not contact with molten steel, steel quality is had no adverse effects.In the heat-insulating property that guarantees heat preserving agent with do not make under its overweight situation, for reducing cost, adopted a certain proportion of flyash as filler, utilization of waste material helps environment protection.For further improving its heat-insulating property and reducing proportion, also adopt part vermiculite or expanded graphite to do filler, expanded graphite also can improve the spreadability of heat preserving agent, makes it can be rapidly and cover molten steel surface comprehensively.Also adopt lime and calcined dolomite in powder to make filler, calcined dolomite in powder can improve the fusing point of heat preserving agent, has avoided being tied up with, even be tied up with, CaO contained in the lime of adding can remove the gred, so just eliminated the phenomenon of being tied up with.Lime and calcined dolomite in powder have also played pectisation in addition, are jelling agent.Heat preserving agent is made circular granular, and its motility is good, has improved spreading property, and free from dust is flown upward when pouring molten steel in addition, and is free from environmental pollution.
The prescription of each component following (weight percent): charring rice husk 50-85%, flyash 5-30%, vermiculite or expanded graphite 1-20%, lime 2-20%, calcined dolomite in powder 2-20% adds water 20%.
The technological process of making rounded grain heat preserving agent for liquid steel of the present invention is as follows: as shown in drawings, by above-mentioned prescription each component is added mix in the mixing tank, stirred 5-10 minute with agitator, send into the disc type shaper then, with 50-80 rev/min rotating speed, process was shaped to circular granular in 10-16 minute, send into horizontal cylinder hot air dryer again, under 200-300 ℃ of temperature dry 15-25 minute, obtain the particle of 2-12mm granularity through screening, be finished product after the packing.
Embodiment: prepare burden (weight percentage) by following prescription: charring rice husk 75%, flyash 10%, expanded graphite 6%, lime 4%.Calcined dolomite in powder 5%, water 20% (adding), through mixing, stirring 10 minutes, send into the disc type shaper, with 65 rev/mins rotating speeds, be shaped to circular granular through 12 minutes, send into horizontal cylinder hot air dryer again, 250 ℃ dry 20 minutes down, rescreen the particle that is divided into the 2-12mm granularity, be finished product after the packing.
On March 2nd, 2000 this heat preserving agent trial target is tested (20 jars of continuous casting 0.8/Ax steel, 5 jars of die castings, steel grade is K16Mn, 15Mo3, K20MnSi etc.) on 25 jars of ladles of Shoudu Iron and Steel Co first steelworks, its test situation is as follows:
1. test with the comprehensive rerum natura of heat preserving agent is:
Proportion 0.2683g/cm
3, C content 33.87%, thermal conductivity 0.035W/ (m. ℃), fugitive constituent 10.95%, moisture content 2.64%
2. packing specifications: interior with plastics bag, external application woven bag, every bag 5kg.
3. test effect:
1) high insulating effect, 1.08 ℃ of molten steel temperature drop average out to.
2) proportion is little, adds fashionable no molten steel and splashes, and operating environment is good, pollution-free,
Safety has no adverse effects to steel quality.
3) circular granular, motility is good, is loose condition (of surface) after the adding, and spreadability is good,
Can cover molten steel rapidly comprehensively, simultaneously add fashionablely, free from dust is flown upward, and does not pollute
Environment.
4) cast is normal, the phenomenon that do not crust, and the bag mouth is not stained with slag.Shoudu Iron and Steel Co first steelworks is very satisfied to the test expression, prepares to vigorously promote the use.
Claims (2)
1. heat preserving agent for liquid steel, with the charring rice husk is base-material, it is characterized in that: it is a filler with flyash, expanded graphite or vermiculite, with lime, calcined dolomite in powder not only is filler but also be jelling agent, each component is prepared burden by a certain percentage and is added water mixing, stirring, must be shaped to circular granular, the prescription of each component is (weight percentage):
Charring rice husk 50-85%,
Flyash 5-30%,
Expanded graphite or vermiculite 1-20%,
Lime 2-20%,
Calcined dolomite in powder 2-20%,
Add water 20%.
2. manufacture method of making the described rounded grain heat preserving agent for liquid steel of claim 1, comprise operations such as batching, mixing, stirring, moulding, drying, screening, it is characterized in that: each component prepares material by above-mentioned prescription, mix, stir, churning time is 5-10 minute, send into the disc type shaper then, rotating speed with 50-80 rev/min, through 10-16 minute, be shaped to circular granular, enter horizontal cylinder hot air dryer again, under 200-300 ℃ of temperature dry 15-25 minute, rescreen and be divided into the particle that granularity is 0.2-1.2mm, the packing back is a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110748A CN1098130C (en) | 2000-08-01 | 2000-08-01 | Grcular particles of insulating agent for molten steel and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110748A CN1098130C (en) | 2000-08-01 | 2000-08-01 | Grcular particles of insulating agent for molten steel and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1283533A CN1283533A (en) | 2001-02-14 |
| CN1098130C true CN1098130C (en) | 2003-01-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00110748A Expired - Fee Related CN1098130C (en) | 2000-08-01 | 2000-08-01 | Grcular particles of insulating agent for molten steel and its preparing process |
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| Country | Link |
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| CN (1) | CN1098130C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343425A (en) * | 2010-08-03 | 2012-02-08 | 安徽瑞丝保温材料有限公司 | Granular rice hull ash thermal insulation agent |
| CN103231034A (en) * | 2013-04-09 | 2013-08-07 | 宣全 | Rice hull ash composite covering agent |
| CN103276145B (en) * | 2013-05-22 | 2014-12-24 | 武汉钢铁(集团)公司 | Cold pressing pellet for insulating molten iron |
| CN104313212B (en) * | 2014-09-28 | 2017-02-22 | 四川德胜集团钒钛有限公司 | Molten iron heat preservation agent, preparation method of molten iron heat preservation agent and method for preserving temperature of molten iron |
| CN105018663A (en) * | 2015-08-14 | 2015-11-04 | 武钢集团昆明钢铁股份有限公司 | Molten iron biomass composite insulation agent and preparation method and application thereof |
| CN107893145A (en) * | 2017-08-22 | 2018-04-10 | 广西柳钢环保股份有限公司 | Thermal-insulating covering agent |
| CN107552746B (en) * | 2017-08-31 | 2020-04-07 | 赣州鼎洋贸易有限公司 | Molten steel heat-insulating agent and heat-insulating agent layer thereof |
| CN108145108A (en) * | 2017-12-30 | 2018-06-12 | 蒋文明 | A kind of tundish covering flux |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566353A (en) * | 1979-06-27 | 1981-01-22 | Sanyo Electric Co Ltd | Magnetron |
| CN1063432A (en) * | 1991-01-26 | 1992-08-12 | 黄胜利 | Heat preserving agent for liquid steel |
| CN1169475A (en) * | 1996-06-24 | 1998-01-07 | 周光焰 | Heat-insulation molten steel heat-insulating agent |
| CN1222580A (en) * | 1998-01-08 | 1999-07-14 | 武汉钢铁(集团)公司 | Carbon-free molten steel holding agent and its production |
-
2000
- 2000-08-01 CN CN00110748A patent/CN1098130C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566353A (en) * | 1979-06-27 | 1981-01-22 | Sanyo Electric Co Ltd | Magnetron |
| CN1063432A (en) * | 1991-01-26 | 1992-08-12 | 黄胜利 | Heat preserving agent for liquid steel |
| CN1169475A (en) * | 1996-06-24 | 1998-01-07 | 周光焰 | Heat-insulation molten steel heat-insulating agent |
| CN1222580A (en) * | 1998-01-08 | 1999-07-14 | 武汉钢铁(集团)公司 | Carbon-free molten steel holding agent and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1283533A (en) | 2001-02-14 |
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