CN106011359A - Slag collecting agent for molten iron pretreatment and preparation method thereof - Google Patents
Slag collecting agent for molten iron pretreatment and preparation method thereof Download PDFInfo
- Publication number
- CN106011359A CN106011359A CN201610355888.XA CN201610355888A CN106011359A CN 106011359 A CN106011359 A CN 106011359A CN 201610355888 A CN201610355888 A CN 201610355888A CN 106011359 A CN106011359 A CN 106011359A
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- CN
- China
- Prior art keywords
- fine powder
- molten iron
- fineness
- perlite
- collecting agent
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Classifications
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- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- 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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
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- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a slag collecting agent for molten iron pretreatment and a preparation method thereof. The slag collecting agent is composed of, by weight, 64%-72% of perlite fine powder, 6%-10% of borax, 10%-15% of kaolin clay, 1%-2% of satsuma stone fine powder, 3%-8% of acetylene carbon black and 2%-6% of coal gangue, wherein the fineness of the perlite fine powder, the fineness of the kaolin clay and the fineness of the satsuma stone fine powder are each 120 meshes, and the perlite fine powder, the kaolin clay and the satsuma stone fine powder account for 65% or above of the total weight; the fineness of the acetylene carbon black is 100 meshes, and the acetylene carbon black accounts for 70% or above of the total weight; and the fineness of the borax and the fineness of the coal gangue are each 80 meshes, and the borax and the coal gangue account for 60% of the total weight. Compared with the prior art, the slag collecting agent for molten iron pretreatment and the preparation method thereof have the following advantages that the perlite fine powder and the satsuma stone fine powder are treated in high-temperature hot steam to increase the expansion degree of the perlite fine powder and the expansion degree of the satsuma stone fine powder, so that the perlite fine powder and the satsuma stone fine powder float on the surface of molten iron in the deslagging process, and splashing is avoided so that the perlite fine powder and the satsuma stone fine powder can quickly form high-viscosity colloid on the upper layer conveniently, and the component of the molten iron is not affected; and the cooling speed of the molten iron is decreased, the using amount is small, and the molten iron losses are effectively decreased.
Description
Technical field
The present invention relates to a kind of slagging-off material, be specifically related to a kind of molten iron pretreatment slag collecting agent and preparation method thereof.
Background technology
nullField is manufactured at cast iron metallurgy，In adding materials process，Have useless part foundry returns、Alloy material etc.，Therefore slag can be produced，Wherein，Later stage in Castiron Melting，Molten iron is before coming out of the stove，The mobility of molten iron is preferable，The composite slag microgranule of solid-state can float rapidly upward，And the temperature on molten iron surface is relatively low，These composite slags can solidify rapidly，At this moment，Owing to molten iron surface tension is minimum，Loose scum layer is formed on upper strata，Slag and molten iron are more easily separated，In order to prevent slag from flowing into die cavity with molten iron，Need to skim before casting，Now the viscosity of slag is poor，Today there is also many collection slag agent，But make after much directly being mixed by chemical raw material，Higher temperature is needed to dry，And it is inadequate due to viscosity during skimming，Cause poly-slag efficiency low，Molten iron is caused to be lowered the temperature，The liquid iron balling after part nodularization is made to fail.
Summary of the invention
It is an object of the invention to for existing problem, it is provided that a kind of molten iron pretreatment slag collecting agent and preparation method thereof.
The present invention is achieved by the following technical solutions: a kind of molten iron pretreatment slag collecting agent, is made up of the raw material of following weight portion: perlite fine powder 64-72%, Borax 6-10%, kaolinton 10-15%, plants metal and stone fine powder 1-2%, acetylene carbon black 3-8%, gangue 2-6%；Wherein, perlite fine powder, kaolinton, the fineness of planting metal and stone fine powder are that 120 purposes account for more than the 65% of gross weight, and acetylene carbon black fineness is that to account for more than the 70% of gross weight, Borax and gangue fineness be that 80 purposes account for the 60% of gross weight to 100 purposes.
As further improvement of these options, described gangue is selected from colliery, and the percentage by weight of main chemical compositions is as follows: SiO248.56%, Al2O335.62%, Fe2O31.35%, CaO1.68%, MgO1.02%, other 1.79, loss on ignition 9.98%.
The preparation method of a kind of molten iron pretreatment slag collecting agent, specifically comprises the following steps that
(1) by the perlite fine powder of corresponding weight with plant after metal and stone fine powder stirs, vapours higher than 90 DEG C is steamed 20-30 minute, it is then placed in the baking oven of 350-400 DEG C being dried 10-15 minute, then baking oven is warming up to 550-600 DEG C, obtains first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 3-5%, mixing, mixing speed is 750-800 rev/min, takes out, obtain mixture after stirring mixing 20-25min；
(3) said mixture is put in the sintering furnace that temperature is 1200-1250 DEG C, be incubated 1-1.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 500 DEG C removing water 5-10 minute, pulverizes in breaker, sieve, finished product can be packaged to be.
As further improvement of these options, the particle size range of described collection slag agent is: 0.35-0.4mm, 0.8-1mm, 1.4-1.8mm.
Collecting slag agent usage amount in the range of different-grain diameter in the present invention as follows, wherein usage amount is the percentage ratio that collection slag agent accounts for molten cast iron gross weight:
| Scope (mm) | Usage amount (%) |
| 0.35-0.4 | 0.06-0.08 |
| 0.8-1 | 0.04-0.06 |
| 1.4-1.8 | 0.025-0.04 |
Table 1
The present invention collects slag agent and can quickly form high viscosity colloid at a temperature of 1200-1400 DEG C, scum layer loose for molten iron surface is formed rapidly the clinker of bulk, completes before molten iron is lowered the temperature.
The present invention has the advantage that perlite fine powder in the present invention compared to existing technology and plants metal and stone fine powder and process in high-temperature hot steam, increase its swelling degree, make its slag removal floats on molten iron surface, do not splash, it is easy to it and quickly forms high viscosity colloid on upper strata, do not affect hot metal composition, slow down molten iron cooling rate, usage amount is few, effectively reduces molten iron loss.
Detailed description of the invention
Embodiment 1
A kind of molten iron pretreatment slag collecting agent, is made up of the raw material of following weight portion: perlite fine powder 64%, Borax 10%, kaolinton 12%, plants metal and stone fine powder 1%, acetylene carbon black 7%, gangue 6%；Wherein, perlite fine powder, kaolinton, the fineness of planting metal and stone fine powder are that 120 purposes account for more than the 65% of gross weight, and acetylene carbon black fineness is that to account for more than the 70% of gross weight, Borax and gangue fineness be that 80 purposes account for the 60% of gross weight to 100 purposes.
Wherein, described gangue is selected from colliery, and the percentage by weight of main chemical compositions is as follows: SiO248.56%, Al2O335.62%, Fe2O31.35%, CaO1.68%, MgO1.02%, other 1.79, loss on ignition 9.98%.
The preparation method of a kind of molten iron pretreatment slag collecting agent, specifically comprises the following steps that
(1) by the perlite fine powder of corresponding weight with plant after metal and stone fine powder stirs, vapours higher than 90 DEG C is steamed 20-30 minute, it is then placed in the baking oven of 350-400 DEG C being dried 10-15 minute, then baking oven is warming up to 550-600 DEG C, obtains first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 3-5%, mixing, mixing speed is 750-800 rev/min, takes out, obtain mixture after stirring mixing 20-25min；
(3) said mixture is put in the sintering furnace that temperature is 1200-1250 DEG C, be incubated 1-1.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 500 DEG C removing water 5-10 minute, pulverizes in breaker, sieve, finished product can be packaged to be.
In the present embodiment, the particle size range of gained collection slag agent is: 0.35-0.4mm, and usage amount is the 0.06-0.08% of molten iron gross weight.
Embodiment 2
A kind of molten iron pretreatment slag collecting agent, is made up of the raw material of following weight portion: perlite fine powder 70%, Borax 6%, kaolinton 12%, plants metal and stone fine powder 2%, acetylene carbon black 5%, gangue 5%；Wherein, perlite fine powder, kaolinton, the fineness of planting metal and stone fine powder are that 120 purposes account for more than the 65% of gross weight, and acetylene carbon black fineness is that to account for more than the 70% of gross weight, Borax and gangue fineness be that 80 purposes account for the 60% of gross weight to 100 purposes.
Its preparation method is in the same manner as in Example 1.
In the present embodiment, the particle size range of gained collection slag agent is: 0.8-1mm, and usage amount is the 0.04-0.06% of molten iron gross weight.
Embodiment 3
A kind of molten iron pretreatment slag collecting agent, is made up of the raw material of following weight portion: perlite fine powder 72%, Borax 8%, kaolinton 14%, plants metal and stone fine powder 1%, acetylene carbon black 3%, gangue 2%；Wherein, perlite fine powder, kaolinton, the fineness of planting metal and stone fine powder are that 120 purposes account for more than the 65% of gross weight, and acetylene carbon black fineness is that to account for more than the 70% of gross weight, Borax and gangue fineness be that 80 purposes account for the 60% of gross weight to 100 purposes.
Its preparation method is in the same manner as in Example 1.
In the present embodiment, the particle size range of gained collection slag agent is: 1.4-1.8mm, and usage amount is the 0.025-0.04% of molten iron gross weight.
Using and prepare collection slag agent in embodiment and remove the gred the molten iron of identical weight, and set up matched group, use raw material in the present invention, use common method, after being mixed by raw material, dry except water, prepare, after slagging-off, detection related data draws below table:
| Project | Matched group | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Slagging-off time (s) | 796 | 352 | 363 | 364 |
| Slag band iron (kg/ ton) | 8.76 | 1.85 | 1.72 | 1.78 |
Table 2
By data in table 2 it can be seen that in the present invention deslagging agent collection slag efficiency high, molten iron loss is few, and raw material is easy to get, and is suitable for promoting.
Claims (4)
1. a molten iron pretreatment slag collecting agent, it is characterised in that be made up of the raw material of following weight portion: perlite fine powder 64-72%, Borax 6-10%, kaolinton 10-15%, plants metal and stone fine powder 1-2%, acetylene carbon black 3-8%, gangue 2-6%；Wherein, perlite fine powder, kaolinton, the fineness of planting metal and stone fine powder are that 120 purposes account for more than the 65% of gross weight, and acetylene carbon black fineness is that to account for more than the 70% of gross weight, Borax and gangue fineness be that 80 purposes account for the 60% of gross weight to 100 purposes.
2. a kind of molten iron pretreatment slag collecting agent, it is characterised in that described gangue is selected from colliery, and the percentage by weight of main chemical compositions is as follows: SiO248.56%, Al2O335.62%, Fe2O31.35%, CaO1.68%, MgO1.02%, other 1.79, loss on ignition 9.98%.
3. the preparation method of a molten iron pretreatment slag collecting agent as claimed in claim 1, it is characterised in that specifically comprise the following steps that
(1) by the perlite fine powder of corresponding weight with plant after metal and stone fine powder stirs, vapours higher than 90 DEG C is steamed 20-30 minute, it is then placed in the baking oven of 350-400 DEG C being dried 10-15 minute, then baking oven is warming up to 550-600 DEG C, obtains first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 3-5%, mixing, mixing speed is 750-800 rev/min, takes out, obtain mixture after stirring mixing 20-25min；
(3) said mixture is put in the sintering furnace that temperature is 1200-1250 DEG C, be incubated 1-1.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 500 DEG C removing water 5-10 minute, pulverizes in breaker, sieve, finished product can be packaged to be.
4. a kind of molten iron pretreatment slag collecting agent, it is characterised in that the particle size range of described collection slag agent is: 0.35-0.4mm, 0.8-1mm, 1.4-1.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355888.XA CN106011359A (en) | 2016-05-26 | 2016-05-26 | Slag collecting agent for molten iron pretreatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355888.XA CN106011359A (en) | 2016-05-26 | 2016-05-26 | Slag collecting agent for molten iron pretreatment and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106011359A true CN106011359A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610355888.XA Pending CN106011359A (en) | 2016-05-26 | 2016-05-26 | Slag collecting agent for molten iron pretreatment and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283532A (en) * | 2000-08-08 | 2001-02-14 | 华中科技大学 | Slag-trapping covering agent for casting and its pre-treating process |
| CN1594187A (en) * | 2004-07-07 | 2005-03-16 | 华中科技大学 | Method for producing covering agent for collecting slag |
| CN103276145A (en) * | 2013-05-22 | 2013-09-04 | 武汉钢铁(集团)公司 | Cold pressing pellet for insulating molten iron |
| CN103589826A (en) * | 2013-10-30 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Molten iron slag collecting agent and preparation method thereof |
| CN104818366A (en) * | 2015-04-29 | 2015-08-05 | 江苏大学 | Ladle slag conglomeration agent prepared by boric sludge |
-
2016
- 2016-05-26 CN CN201610355888.XA patent/CN106011359A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283532A (en) * | 2000-08-08 | 2001-02-14 | 华中科技大学 | Slag-trapping covering agent for casting and its pre-treating process |
| CN1594187A (en) * | 2004-07-07 | 2005-03-16 | 华中科技大学 | Method for producing covering agent for collecting slag |
| CN103276145A (en) * | 2013-05-22 | 2013-09-04 | 武汉钢铁(集团)公司 | Cold pressing pellet for insulating molten iron |
| CN103589826A (en) * | 2013-10-30 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Molten iron slag collecting agent and preparation method thereof |
| CN104818366A (en) * | 2015-04-29 | 2015-08-05 | 江苏大学 | Ladle slag conglomeration agent prepared by boric sludge |
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Application publication date: 20161012 |
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