CN109128099A - Manufacturing method of composite iron ball for blast furnace slag dry-type waste heat recovery - Google Patents
Manufacturing method of composite iron ball for blast furnace slag dry-type waste heat recovery Download PDFInfo
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- CN109128099A CN109128099A CN201811026887.6A CN201811026887A CN109128099A CN 109128099 A CN109128099 A CN 109128099A CN 201811026887 A CN201811026887 A CN 201811026887A CN 109128099 A CN109128099 A CN 109128099A
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- Prior art keywords
- ball
- iron
- blast furnace
- copper
- composite iron
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 81
- 239000002893 slag Substances 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000010949 copper Substances 0.000 claims abstract description 38
- 229910052802 copper Inorganic materials 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 14
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 239000011651 chromium Substances 0.000 claims abstract description 8
- 239000011257 shell material Substances 0.000 claims abstract 11
- 239000004576 sand Substances 0.000 claims description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 238000011049 filling Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005338 heat storage Methods 0.000 abstract description 2
- 238000007885 magnetic separation Methods 0.000 abstract description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 34
- 238000001816 cooling Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 244000035744 Hura crepitans Species 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000010227 cup method (microbiological evaluation) Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- VDGJOQCBCPGFFD-UHFFFAOYSA-N oxygen(2-) silicon(4+) titanium(4+) Chemical compound [Si+4].[O-2].[O-2].[Ti+4] VDGJOQCBCPGFFD-UHFFFAOYSA-N 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
一种高炉渣干式余热回收用复合铁球的制造方法，采用铜球作为复合铁球的内芯，通过浇铸的方式使铜球与外壳材料形成复合铁球，复合铁球外壳钢材采用低铬铸铁，铜球与外壳材料的体积比为1：2.82‑1：10；浇注温度为1310℃‑1150℃。本发明的有益效果是：1)复合铁球内部的铜芯导热系数大，与液态高炉渣接触后可实现快速换热储热，而外部的低铬铸铁等材料熔点高、耐磨性好、硬度大、使用寿命长，可满足高炉渣干式余热回收工艺的连续使用要求。2)复合铁球由于外部为铁质壳体，可在完成高炉渣余热回收后通过磁选工艺实现铁球的回收再利用。3)复合铁球具有内铜、外铁的结构，铜芯换热速度快，铁壳熔点高、强度高，复合球抗高温冲击能力较强。A method for manufacturing composite iron balls for dry waste heat recovery from blast furnace slag. The copper ball is used as the inner core of the composite iron ball, and the copper ball and the shell material are formed by casting to form the composite iron ball. The shell steel of the composite iron ball is made of low chromium. Cast iron, the volume ratio of copper balls to shell material is 1:2.82‑1:10; the pouring temperature is 1310℃‑1150℃. The beneficial effects of the present invention are: 1) the copper core inside the composite iron ball has a large thermal conductivity, and can realize rapid heat exchange and heat storage after contacting with the liquid blast furnace slag, while the external low-chromium cast iron and other materials have high melting point, good wear resistance, With high hardness and long service life, it can meet the continuous use requirements of blast furnace slag dry waste heat recovery process. 2) The composite iron ball can be recycled and reused by the magnetic separation process after the blast furnace slag waste heat recovery is completed due to the outer iron shell. 3) The composite iron ball has the structure of inner copper and outer iron, the copper core has a fast heat exchange rate, the iron shell has a high melting point and high strength, and the composite ball has strong high temperature impact resistance.
Description
Technical field
The present invention relates to compound steel ball manufacture neighborhoods more particularly to a kind of blast furnace slag dry type waste heat to recycle compound iron ball
Manufacturing method.
Background technique
Blast furnace slag is the by-product of blast furnace process.Its main component is calcium oxide, magnesia, aluminum oxide, titanium dioxide
Silicon etc. can replace natural rock production cement or slag differential etc. to be used for building material product.The tapping temperature of blast furnace slag is greater than 1500
DEG C, the heat contained by 1 ton of blast furnace slag is equivalent to 64kg standard coal, and existing processing method uses water quenching technology, in addition to few portion
Northern Enterprises are divided to carry out outside heating in winter using the waste heat of washing slag water, substantially without other effective waste heat recovery modes.Cause
This, not only the sensible heat of blast furnace slag and latent heat can not recycle, and cause great energy waste.And INBA method flush slag technique
The a large amount of wastes for also causing water resource also result in serious pollution to big gas and water and soil.Through investigating, exploitation is high both at home and abroad
The research of clinker dry type heat recovery technology is more, but does not have the report of industrial applications always.
Through investigating, majority blast furnace cinder Exposure degree technology is in the laboratory research stage at present both at home and abroad, can be by it
Waste heat recovery mode is divided into physical thermal absorption method and chemical heat absorption method.Wherein the former is according to the difference of slag pre-treating method,
It is divided into drum process, wind quenching method, continuous casting type waste heat boiler method, mechanical mixing method, revolving cup method, steel ball cold quenching method etc. again.Wherein steel ball
Cold quenching method becomes the weight of blast furnace slag waste heat recovery technology because having many advantages, such as that water consumption, recuperation of heat potentiality are not big, sulfide emission is few
Want research direction.
But steel ball used in the technique need to have, and thermal coefficient is big, accumulation of heat exotherm rate is fast, impact capacity resistant to high temperatures is strong,
The features such as service life is long, the steel ball of single material are difficult to meet the requirement of blast furnace slag waste heat recovery process.
The compound method of bimetallic have casting it is compound, diffusion connection, cold rolling, extruding, explode weldering, plasma activated sintering,
Agitating friction weldering etc..Wherein, solid-liquid composite casting is a kind of very simple, economical and effective bimetallic complex method.
Solid-liquid composite casting technique is to be poured into coating metal liquid on prefabricated parent metal or will be at surface
The parent metal managed is submerged in coating metal liquid, is formed between continuous metal and is spread by two kinds of intermetallic diffusion reactions
Area is to form the process of composite material.Many researchs all connect identical or dissimilar materials pair using composite casting, such as
Steel/cast iron, steel/aluminium, copper/aluminium, aluminium/aluminium, magnesium/magnesium, aluminium/magnesium, titanium/aluminium etc..
But steel ball in the prior art is difficult to meet the requirement of steel ball cold quenching method blast furnace slag waste heat recovery process, Er Qiegao
The relative production technology of afterheat of slags recovery process specific complex metal ball is relatively fewer.
Summary of the invention
The object of the present invention is to provide the manufacturing methods that a kind of blast furnace slag dry type waste heat recycles compound iron ball, overcome existing
Deficiency existing for technology, the compound iron ball produced have that thermal coefficient is big, accumulation of heat exotherm rate is fast, wearability is good, the service life is long
The features such as, the requirement of blast furnace slag dry type waste heat reclaiming process can be met.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of blast furnace slag dry type waste heat recycles the manufacturing method of compound iron ball, using copper ball as in compound iron ball
Core is made copper ball and sheathing material form compound iron ball by way of casting, specifically comprised the following steps:
1) when filling sand mold assembly mold, first copper ball is fixed among sand mold with bracket and running channel, and the row of fixing
Stomata exhaust aluminum pipe；
2) volume ratio of copper ball and sheathing material is 1:2.82-1:10；
3) compound iron ball shell molten iron is melted to 1470 DEG C -1360 DEG C, and keeps the temperature 10-20min, and deoxidier deoxidation is added；
4) it casts into sand mold compound iron ball shell molten iron, pouring temperature is 1310 DEG C -1150 DEG C；
5) stationary fixture on sand mold is opened after molten iron natural cooling 20-40min in sand mold；Sand mold continues natural cooling
After 20-40min, sand mold mould is opened, obtains the compound iron ball that shell steel are low-chromium cast-iron.
The compound iron ball shell cast thickness is 2.80-34.27mm.
The copper content 75%-100% of the copper ball, diameter 10-28mm.
The bracket is made of the iron wire or steel wire of Φ 1mm- Φ 3mm.
The gas vent is with exhaust aluminum pipe with a thickness of 0.5-1mm, aperture 1.5-3mm.
Compared with prior art, the beneficial effects of the present invention are:
1) the copper core thermal coefficient inside compound iron ball is big, and quickly heat exchange heat accumulation can be achieved after contacting with liquid blast furnace,
And the material melting points such as external low-chromium cast-iron are high, wearability is good, hardness is big, long service life, can meet blast furnace slag dry type waste heat
The continuous use requirement of recovery process.
2) compound iron ball due to outside be ferrous casings, can complete blast furnace slag waste heat recycling after by magnetic separation process realization
The recycling and reusing of iron ball.
3) compound iron ball has the structure of interior copper, outer iron, and copper core heat transfer rate is fast, and iron-clad fusing point is high, intensity is high, composite balls
Impact capacity resistant to high temperatures is stronger.
Specific embodiment
Specific embodiments of the present invention will be further explained below:
A kind of blast furnace slag dry type waste heat recycles the manufacturing method of compound iron ball, using copper ball as in compound iron ball
Core is made copper ball and sheathing material form compound iron ball by way of casting, specifically comprised the following steps:
1) when filling sand mold assembly mold, first copper ball is fixed among sand mold with bracket and running channel, and the row of fixing
Stomata exhaust aluminum pipe；
Start back-up sand after bracket and gas vent are fixed, manufactures sand mold, and dried；The sandbox of drying is subjected to group
Dress is fixed, and casting is prepared.
2) volume ratio of copper ball and sheathing material is 1:2.82-1:10；
When the volume ratio of copper ball and sheathing material is too small, molten iron cooling velocity is too fast, it is difficult to cladding copper ball completely；Volume ratio
When excessive, molten iron heat is big, and copper ball surface melting will be made excessive, is easy to appear leakage copper phenomenon.
3) compound iron ball shell molten iron is melted to 1470 DEG C -1360 DEG C, and keeps the temperature 10-20min, and deoxidier deoxidation is added；
Surface scum is cleaned out after completing deoxidation operation, molten iron is transferred in tundish later.
4) it casts into sand mold compound iron ball shell molten iron, pouring temperature is 1310 DEG C -1150 DEG C；
Tundish is transported to above sand mold, molten iron is slowly equably poured into sand mold.When molten iron cast temperature is excessively high
It is excessively high to will lead to molten iron temperature, molten iron flow is excessive, will lead to copper core fusing, and copper ball easily deviates center；Molten iron casting
The problems such as when temperature is relatively low, it is insufficient to easily lead to the perfusion of compound iron ball, and shape is imperfect, village hollowing.
5) stationary fixture on sand mold is opened after molten iron natural cooling 20-40min in sand mold；Sand mold continues natural cooling
After 20-40min, sand mold mould is opened, obtains the compound iron ball that shell steel are low-chromium cast-iron.
6) compound iron ball is obtained after clearing up sand mold mould, and carries out corner cleaning and finished product can be obtained.
The compound iron ball shell cast thickness is 2.80-34.27mm.
The copper content 75%-100% of the copper ball, diameter 10-28mm.
When the copper content of the copper ball is lower, the heat accumulation exotherm rate of copper ball inner core and quantity of heat storage will be decreased obviously, and will
It is substantially reduced advantage of its relatively pure iron ball as blast furnace slag waste heat recycling heat accumulation exothermic medium.
The bracket is made of the iron wire or steel wire of Φ 1mm- Φ 3mm.
The gas vent is with exhaust aluminum pipe with a thickness of 0.5-1mm, aperture 1.5-3mm.
When gas vent is smaller with exhaust aluminum pipe aperture, casting exhaust is insufficient, will lead to compound iron ball and hollow phenomenon occurs, multiple
The intensity and thermal coefficient for closing iron ball are decreased obviously；When gas vent is larger with exhaust aluminum pipe aperture, molten steel condensation retraction will lead to
Ratio is big, and compound iron ball feeding hole is coarse, and shape is imperfect, and easily occurs leaking copper problem caused by copper core fusing.
Compound iron ball avergae specific heat is 425.5-450J/kgK, and thermal coefficient is 50.5-195W/m under the conditions of 20 DEG C
K。
Embodiment 1
A kind of blast furnace slag dry type waste heat recycles the manufacturing method of compound iron ball, comprising the following steps:
1) copper ball bracket.Copper ball is fixed among sand mold with irony bracket and running channel.
2) it is embedded to sand mold.Start back-up sand after bracket and gas vent are fixed, manufactures sand mold, and dried.
3) mold assembles.The sandbox of drying is subjected to assembling fixation, prepares casting.
4) steel melt.Compound iron ball shell is melted with steel, and keeps the temperature 20min.
5) deoxidation is tapped.It is put into deoxidier into the molten iron melted, does surface scum cleaning after completing deoxidation operation
Only, molten iron is transferred in tundish later.
6) sand casting.Tundish is transported to above sand mold, molten iron is slowly equably poured into sand mold.Pouring temperature
1310℃。
7) sand mold is cooling.After making the molten steel natural cooling 30min in sand mold, unlocked device is fixed on sand mold.
8) mold is opened.After sand mold continues cooling natural cooling 30min, sand mold mould is opened.
9) product model separates.Casting composite balls and sprue metal body are separated.
10) finished product.Corner is finished product composite balls after clearing up.
Compound iron ball shell is low-chromium cast-iron, cast thickness 10mm with steel.
Compound iron ball inner core is copper ball, copper content 100%, diameter 20mm.
The volume ratio of copper ball and sheathing material is 1:7.
Through examining, compound iron ball avergae specific heat is 432J/kgK, and thermal coefficient is 115W/mK under the conditions of 20 DEG C.It is multiple
It closes iron ball heat accumulation thermal discharge and exotherm rate under the conditions of 700-1000 DEG C and is superior to low-chromium cast-iron ball.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026887.6A CN109128099A (en) | 2018-09-04 | 2018-09-04 | Manufacturing method of composite iron ball for blast furnace slag dry-type waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026887.6A CN109128099A (en) | 2018-09-04 | 2018-09-04 | Manufacturing method of composite iron ball for blast furnace slag dry-type waste heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109128099A true CN109128099A (en) | 2019-01-04 |
Family
ID=64826742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811026887.6A Pending CN109128099A (en) | 2018-09-04 | 2018-09-04 | Manufacturing method of composite iron ball for blast furnace slag dry-type waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109128099A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3254849A (en) * | 1961-04-27 | 1966-06-07 | Babcock & Wilcox Co | Cast hollow balls |
| CN1767916A (en) * | 2003-03-25 | 2006-05-03 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN200981105Y (en) * | 2006-12-19 | 2007-11-28 | 林道杰 | Novel zinc alloy head built-in hollow inner billet |
| CN108188380A (en) * | 2017-12-28 | 2018-06-22 | 鞍钢矿山机械制造有限公司 | A kind of production method of steel copper composite balls |
-
2018
- 2018-09-04 CN CN201811026887.6A patent/CN109128099A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3254849A (en) * | 1961-04-27 | 1966-06-07 | Babcock & Wilcox Co | Cast hollow balls |
| CN1767916A (en) * | 2003-03-25 | 2006-05-03 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN200981105Y (en) * | 2006-12-19 | 2007-11-28 | 林道杰 | Novel zinc alloy head built-in hollow inner billet |
| CN108188380A (en) * | 2017-12-28 | 2018-06-22 | 鞍钢矿山机械制造有限公司 | A kind of production method of steel copper composite balls |
Non-Patent Citations (3)
| Title |
|---|
| 刘勇等: "《材料物理性能》", 30 September 2015, 北京航空航天大学出版社 * |
| 朱苗勇等: "《现代冶金工艺学 钢铁冶金卷》", 31 December 2016, 冶金工业出版社 * |
| 机械工人应知考核解题丛书编审委员会编: "《铸造工应知考核题解》", 30 April 1999, 机械工业出版社 * |
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Application publication date: 20190104 |