CN106011382A - Efficient slag collecting agent for cast steel slag and preparation method thereof - Google Patents

Efficient slag collecting agent for cast steel slag and preparation method thereof Download PDF

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Publication number
CN106011382A
CN106011382A CN201610355874.8A CN201610355874A CN106011382A CN 106011382 A CN106011382 A CN 106011382A CN 201610355874 A CN201610355874 A CN 201610355874A CN 106011382 A CN106011382 A CN 106011382A
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China
Prior art keywords
slag
cast steel
collecting agent
fine powder
gross weight
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Pending
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CN201610355874.8A
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Chinese (zh)
Inventor
孙爱琴
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Hefei Tenver Precision Casting Co Ltd
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Hefei Tenver Precision Casting Co Ltd
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Priority to CN201610355874.8A priority Critical patent/CN106011382A/en
Publication of CN106011382A publication Critical patent/CN106011382A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses an efficient slag collecting agent for cast steel slag and a preparation method thereof. The efficient slag collecting agent is composed of, by weight, 62%-68% of perlite fine powder, 4%-8% of vermiculite, 1%-2% of kiryu sand, 10%-15% of kaolin clay, 2%-6% of white carbon black, 2%-4% of fluorite, 1%-3% of epoxy resin and 4%-8% of coal gangue. Compared with the prior art, the efficient slag collecting agent for the cast steel slag and the preparation method thereof have the following advantages that the perlite fine powder and the kiryu sand are processed in high-temperature hot steam so as to be pre-expanded and then is dried through temperature changing, expansion of gas in particle pores is accelerated, improving of the expansion degree of the slag collecting agent is facilitated, and accordingly the thickening effect of a solder splash layer is improved; molten slag and impurities are bonded together through instant expansion of a micropore structure, and the acting speed is high; a part of crystal water in the slag collecting agent can be effectively removed in the treatment process, potential safety hazards are decreased, and the using amount is small; and the environment cannot be polluted, and the component of a cast steel solution cannot be changed.

Description

A kind of efficiently collection slag agent for cast steel slag and preparation method thereof
Technical field
The present invention relates to a kind of slagging-off material, be specifically related to a kind of efficiently collection slag agent for cast steel slag and preparation method thereof.
Background technology
Field is manufactured at cast steel metallurgy, in adding materials process, have useless part foundry returns, alloy material etc., therefore slag can be produced, wherein, during cast steel, after liquid particulate floats, form the melted shoddye layer that viscosity is the highest, with molten steel surface is tightly combined, for solid slag, mobility is the highest, it is difficult to when skimming remove, in hgher efficiency in order to skim before casting, need the most again to adjust the physical state of slag, to high viscosity shoddye thickening, the existing deslagging agent viscosity focusing on improving slag blanket more, and usually have and directly use the collection slag agent to molten iron deslagging, cause the weak effect that removes the gred.
Summary of the invention
It is an object of the invention to for existing problem, it is provided that a kind of efficiently collection slag agent for cast steel slag and preparation method thereof.
The present invention is achieved by the following technical solutions: a kind of efficiently collection slag agent for cast steel slag, it is made up of the raw material of following weight portion: perlite fine powder 62-68%, Vermiculitum 4-8%, paulownia greensand 1-2%, kaolinton 10-15%, white carbon 2-6%, fluorite 2-4%, epoxy resin 1-3%, gangue 4-8%；Wherein, perlite fine powder, kaolinton, the fineness of white carbon are that 120 purposes account for more than the 65% of gross weight, and Vermiculitum, paulownia greensand, fluorite, the fineness of gangue are that 100 purposes account for more than the 70% of gross weight, and the fineness of epoxy resin is that 80 purposes account for the 60% of gross weight.
As further improvement of these options, described gangue is selected from colliery, and the percentage by weight of main chemical compositions is as follows: SiO250.36%, Al2O332.18%, Fe2O30.96%, CaO1.24%, MgO1.05%, other 1.64, loss on ignition 12.57%.
A kind of preparation method efficiently collecting slag agent for cast steel slag, specifically comprises the following steps that
(1) after the perlite fine powder of corresponding weight and paulownia greensand being stirred, steam 15-20 minute in the vapours higher than 95 DEG C, be then placed in the baking oven of 500-600 DEG C being dried 10-15 minute, then baking oven be warming up to 650-750 DEG C, obtain first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 5-6%, mixing, mixing speed is 800-900 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 2-2.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 600 DEG C removing water 8-15 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: 1.2-2mm, 2.5-3mm, 3.5-5mm.
Fluorite plays fluxing action during collection slag agent uses, and can also reduce sintering temperature simultaneously, high viscosity shoddye is had thickening power.
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 cast steel molten iron gross weight:
Scope (mm) Usage amount (%)
1.2-2 0.06-0.08
2.5-3 0.04-0.06
3.5-5 0.025-0.04
Table 1
The present invention has the advantage that compared to existing technology in the present invention and perlite fine powder and paulownia greensand is processed in high-temperature hot steam, make its pre-puffed, pass through temperature-variable drying again, the expansion of gas in acceleration microgranule hole, contribute to collecting the raising of slag agent swelling degree, and then increase the thickening effect of scruff layer, the instantaneous expansion of microcellular structure makes slag and impurity be bonded together, effect is very fast, effectively removing the partially crystallizable water in collection slag agent in processing procedure, reduce potential safety hazard, usage amount is few, do not result in environmental pollution, cast steel solution composition will not be changed.
Detailed description of the invention
Embodiment 1
A kind of efficiently collection slag agent for cast steel slag, is made up of the raw material of following weight portion: perlite fine powder 62%, Vermiculitum 6%, paulownia greensand 2%, kaolinton 12%, white carbon 4%, fluorite 4%, epoxy resin 2%, gangue 8%；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: SiO250.36%, Al2O332.18%, Fe2O30.96%, CaO1.24%, MgO1.05%, other 1.64, loss on ignition 12.57%.
A kind of preparation method efficiently collecting slag agent for cast steel slag, specifically comprises the following steps that
(1) after the perlite fine powder of corresponding weight and paulownia greensand being stirred, steam 15-20 minute in the vapours higher than 95 DEG C, be then placed in the baking oven of 500-600 DEG C being dried 10-15 minute, then baking oven be warming up to 650-750 DEG C, obtain first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 5-6%, mixing, mixing speed is 800-900 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 2-2.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 600 DEG C removing water 8-15 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: 1.2-2mm, and usage amount is the 0.06-0.08% of molten iron gross weight.
Embodiment 2
A kind of efficiently collection slag agent for cast steel slag, is made up of the raw material of following weight portion: perlite fine powder 66%, Vermiculitum 4%, paulownia greensand 2%, kaolinton 15%, white carbon 2%, fluorite 3%, epoxy resin 2%, 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.
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: 2.5-3mm, and usage amount is the 0.04-0.06% of molten iron gross weight.
Embodiment 3
A kind of efficiently collection slag agent for cast steel slag, is made up of the raw material of following weight portion: perlite fine powder 68%, Vermiculitum 8%, paulownia greensand 2%, kaolinton 12%, white carbon 2%, fluorite 2%, epoxy resin 2%, gangue 4%；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: 3.5-5mm, 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 steel 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) 865 384 379 382
Slag band iron (kg/ ton) 10.65 2.24 2.35 2.28
Table 2
By data in table 2 it can be seen that in the present invention deslagging agent can make melted shoddye layer fast thickening at short notice, slag-removing time is short, and slag band iron greatly reduces, and reduces percent defective, shortens the operation cycle.

Claims (4)

1. the efficiently collection slag agent for cast steel slag, it is characterised in that be made up of the raw material of following weight portion: perlite fine powder 62-68%, Vermiculitum 4-8%, paulownia greensand 1-2%, kaolinton 10-15%, white carbon 2-6%, fluorite 2-4%, epoxy resin 1-3%, gangue 4-8%；Wherein, perlite fine powder, kaolinton, the fineness of white carbon are that 120 purposes account for more than the 65% of gross weight, and Vermiculitum, paulownia greensand, fluorite, the fineness of gangue are that 100 purposes account for more than the 70% of gross weight, and the fineness of epoxy resin is that 80 purposes account for the 60% of gross weight.
A kind of efficiently collection slag agent for cast steel slag, it is characterised in that described gangue is selected from colliery, and the percentage by weight of main chemical compositions is as follows: SiO250.36%, Al2O332.18%, Fe2O30.96%, CaO1.24%, MgO1.05%, other 1.64, loss on ignition 12.57%.
3. the preparation method efficiently collecting slag agent being used for cast steel slag as claimed in claim 1, it is characterised in that specifically comprise the following steps that
(1) after the perlite fine powder of corresponding weight and paulownia greensand being stirred, steam 15-20 minute in the vapours higher than 95 DEG C, be then placed in the baking oven of 500-600 DEG C being dried 10-15 minute, then baking oven be warming up to 650-750 DEG C, obtain first mixture；
(2) above-mentioned first mixture and leftover materials being put in agitator, and add the water being equivalent to its gross weight 5-6%, mixing, mixing speed is 800-900 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 2-2.5 hour, quickly cool down, obtain the slag agent of block collection, it is then placed in the baking oven of 600 DEG C removing water 8-15 minute, pulverizes in breaker, sieve, finished product can be packaged to be.
A kind of efficiently collection slag agent for cast steel slag, it is characterised in that the particle size range of described collection slag agent is: 1.2-2mm, 2.5-3mm, 3.5-5mm.
CN201610355874.8A 2016-05-26 2016-05-26 Efficient slag collecting agent for cast steel slag and preparation method thereof Pending CN106011382A (en)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1032959A (en) * 1987-11-04 1989-05-17 唐国进 Floss collecting agent for temperature isolation
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
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
CN104439200A (en) * 2014-11-24 2015-03-25 上海纵化实业有限公司 Exothermic heat-insulating covering agent used for casting steel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1032959A (en) * 1987-11-04 1989-05-17 唐国进 Floss collecting agent for temperature isolation
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
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
CN104439200A (en) * 2014-11-24 2015-03-25 上海纵化实业有限公司 Exothermic heat-insulating covering agent used for casting steel

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Application publication date: 20161012