CN109628734A - A kind of fire grate bar for sintering pallet - Google Patents
A kind of fire grate bar for sintering pallet Download PDFInfo
- Publication number
- CN109628734A CN109628734A CN201910016072.8A CN201910016072A CN109628734A CN 109628734 A CN109628734 A CN 109628734A CN 201910016072 A CN201910016072 A CN 201910016072A CN 109628734 A CN109628734 A CN 109628734A
- Authority
- CN
- China
- Prior art keywords
- fire grate
- grate bar
- sintering pallet
- mold
- pressure
- Prior art date
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of fire grate bar for sintering pallet, grain size number is 7 ~ 9 grades, and size of microcrystal is distributed as 5 ~ 15 μm, and tensile strength is 700 ~ 900MPa, and elongation percentage is 15 ~ 20%.It is poured into the type chamber of mold through melting liquid furnace charge, apply to it and keeps at least pressure of 500MPa, the material base after solidification after punching solidification.
Description
Technical field
Rapid wear the present invention relates to a kind of easily worn part of steel plant-scale equipment, in particular on a kind of sintering pallet
The fire grate bar of one of component.
Background technique
Fire grate bar be it is a kind of for steel production in sintering pallet on easily worn part, fire grate bar used at present,
The poor mechanical property of fire grate bar is seriously led to due to internal flaw and very rapid wear easily consumes, and steel mill's pallet, exist for a long time
It being used at a high temperature of 1300 DEG C, fire grate bar is as main wearing detail, since loss is serious, service life is short and performance is bad,
Affect the production efficiency and production cost of sintering mill (plant).
Summary of the invention
The present invention is intended to provide a kind of fire grate bar for sintering pallet, can prolong its service life, which reduces it, makes
With loss, improves the production efficiency of sintering mill (plant), reduces production cost.The present invention is realized by following scheme.
A kind of fire grate bar for sintering pallet, grain size number are 7 ~ 9 grades, and size of microcrystal is distributed as 5 ~ 15 μm.
Tensile strength is 700 ~ 900MPa, and elongation percentage is 15 ~ 20%.
Above-mentioned fire grate bar is to be obtained using following preparation methods, will be through melting --- the liquid furnace charge after purification slagging-off pours into
10 ~ 20 seconds are stood in mold and is molded, and furnace charge is applied to it full of in the type chamber of mold and keeps at least pressure of 500MPa later
Power 10 ~ 20 seconds, the material base after the solidification of liquid furnace charge after punching solidification.
The direction for applying and keeping pressure is from the upper and lower both direction of mold while to apply pressure, and the two directions
The pressure size allocation proportion of application is 2:3.
Apply and keep the instrument of pressure that four-column hydraulic press can be used, apply pressure upwards with liftout tank, with feeding cylinder to
Lower application pressure.
Compared with prior art, fire grate bar of the invention has the advantage that
1, fire grate bar internal grain of the invention is tiny, crystal boundary is clean, internal without any defect, and the power of fire grate bar greatly improved
Performance is learned, while service life improves 30% than traditional fire grate bar.This greatly reduces the production consumption of steel mill sintering mill (plant),
Reduce maintenance downtime, improves production efficiency.
2, the acquisition process flow of product of the invention is short and the manufacturing process ratio of conventional cast fire grate bar, process are simplified
To only three steps, people's production efficiency is improved, energy consumption is reduced, is generated during most important without antiquated sand, production operation environment
Completely.
3, fire grate bar of the invention, quality consistency in batch production is very good, this is also existing conventional cast furnace
What grid section cannot achieve.
Specific embodiment
Embodiment 1
A kind of sintering pallet fire grate bar, is prepared using following steps:
(I) by Charging stock recipe used in existing fire grate bar will, by furnace charge high temperature melting to becoming liquid, and poured into 1600 DEG C
In mold, after standing 15 seconds, molded using four-column hydraulic press.
(II) after molding, the liftout tank of four-column hydraulic press will head into liquid furnace charge in the type chamber of mold, and make furnace in 5 seconds
Material is full of type chamber, starts to apply 300 tons of pressure and holding later.
(III) while liftout tank starts to apply pressure, the feeding cylinder of four-column hydraulic press then applies 200 to mold downwards
The pressure of ton is simultaneously kept for 20 seconds, and liquid furnace charge solidifies completely, ejects material base.
(IV) material base is put into the die cutting die of other four-column hydraulic press and is punched.
The fire grate bar finished product prepared through the above method, surface is clean, by the examination criteria of existing fire grate bar, measures its tension
Intensity is 700MPa, elongation percentage 15%.It is detected using metallographic microscope, the internal grain degree grade of fire grate bar reaches 7 grades, crystalline substance
The particle diameter distribution of grain is 5 ~ 15 μm.
Embodiment 2
A kind of sintering pallet fire grate bar, is prepared using following steps:
(I) by Charging stock recipe used in existing fire grate bar will, by furnace charge high temperature melting to becoming liquid, and poured into 1700 DEG C
In mold, after standing 10 seconds, molded using four-column hydraulic press.
(II) after molding, the liftout tank of four-column hydraulic press will head into liquid furnace charge in the type chamber of mold, and make furnace in 3 seconds
Material is full of type chamber, starts to apply 300 tons of pressure and holding later.
(III) while liftout tank starts to apply pressure, the feeding cylinder of four-column hydraulic press then applies 200 to mold downwards
The pressure of ton is simultaneously kept for 18 seconds, and liquid furnace charge solidifies completely, ejects material base.
(IV) material base is put into the die cutting die of other four-column hydraulic press and is punched.
The fire grate bar finished product prepared through the above method, surface is clean, by the examination criteria of existing fire grate bar, measures its tension
Intensity is 900MPa, elongation percentage 20%.It is detected using metallographic microscope, the internal grain degree grade of fire grate bar reaches 9 grades, crystalline substance
The particle diameter distribution of grain is 5 ~ 15 μm.
Claims (5)
1. a kind of fire grate bar for sintering pallet, it is characterised in that: grain size number is 7 ~ 9 grades, and size of microcrystal is distributed as 5
~15μm。
2. as described in claim 1 be used for sintering pallet fire grate bar, it is characterised in that: tensile strength be 700 ~
900MPa, elongation percentage are 15 ~ 20%.
3. being used for the fire grate bar of sintering pallet as claimed in claim 1 or 2, it is characterised in that: use following preparation methods
It obtains, will be through melting --- the liquid furnace charge after purification slagging-off, which pours into mold, stands molding in 10 ~ 20 seconds, is later full of furnace charge
In the type chamber of mold, apply and keep pressure 10 ~ 20 seconds of at least 500MPa to it, after the solidification of liquid furnace charge after punching solidification
Material base.
4. being used for the fire grate bar of sintering pallet as claimed in claim 3, it is characterised in that: the application simultaneously keeps pressure
Direction is to apply pressure simultaneously from the upper and lower both direction of mold.
5. being used for the fire grate bar of sintering pallet as claimed in claim 4, it is characterised in that: described from upper and lower the two of mold
The pressure size allocation proportion that a direction applies is 2:3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016072.8A CN109628734A (en) | 2019-01-08 | 2019-01-08 | A kind of fire grate bar for sintering pallet |
| PCT/CN2019/076965 WO2020143108A1 (en) | 2019-01-08 | 2019-03-05 | Grate bar for pallet car of sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016072.8A CN109628734A (en) | 2019-01-08 | 2019-01-08 | A kind of fire grate bar for sintering pallet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109628734A true CN109628734A (en) | 2019-04-16 |
Family
ID=66060226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910016072.8A Pending CN109628734A (en) | 2019-01-08 | 2019-01-08 | A kind of fire grate bar for sintering pallet |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109628734A (en) |
| WO (1) | WO2020143108A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647871A (en) * | 2004-12-03 | 2005-08-03 | 李远发 | Double controll one step forming method for metal liquid pressure casting and forging |
| CN102756108A (en) * | 2012-06-27 | 2012-10-31 | 西安交通大学 | Semi-solid extruding and casting molding mould and molding process of compressor crankshaft and |
| JP2012247088A (en) * | 2011-05-25 | 2012-12-13 | Sumitomo Metal Ind Ltd | Seal device for wind box of sintering machine |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN103433466A (en) * | 2013-08-28 | 2013-12-11 | 莱州金雁机械制造有限公司 | Aluminum alloy liquid forging mould and combined forming method of starter outer shell |
| CN103849819A (en) * | 2012-12-04 | 2014-06-11 | 上海梅山钢铁股份有限公司 | Grate bar material and production method thereof as well as combined pouring unit of sintering machine |
| CN103990775A (en) * | 2014-06-06 | 2014-08-20 | 支前明 | Metal extruding, casting and forging forming method and products of method |
| CN106807910A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | Copper mold forges manufacturing process |
| CN108097923A (en) * | 2017-12-31 | 2018-06-01 | 北京航空航天大学 | A kind of differential pressure pressurization casting machine fills the casting device and casting method of type High Pressure Solidification with low pressure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530618A (en) * | 2019-01-08 | 2019-03-29 | 长沙威尔保新材料有限公司 | A kind of preparation method of the fire grate bar on sintering pallet |
-
2019
- 2019-01-08 CN CN201910016072.8A patent/CN109628734A/en active Pending
- 2019-03-05 WO PCT/CN2019/076965 patent/WO2020143108A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647871A (en) * | 2004-12-03 | 2005-08-03 | 李远发 | Double controll one step forming method for metal liquid pressure casting and forging |
| JP2012247088A (en) * | 2011-05-25 | 2012-12-13 | Sumitomo Metal Ind Ltd | Seal device for wind box of sintering machine |
| CN102756108A (en) * | 2012-06-27 | 2012-10-31 | 西安交通大学 | Semi-solid extruding and casting molding mould and molding process of compressor crankshaft and |
| CN103849819A (en) * | 2012-12-04 | 2014-06-11 | 上海梅山钢铁股份有限公司 | Grate bar material and production method thereof as well as combined pouring unit of sintering machine |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN103433466A (en) * | 2013-08-28 | 2013-12-11 | 莱州金雁机械制造有限公司 | Aluminum alloy liquid forging mould and combined forming method of starter outer shell |
| CN103990775A (en) * | 2014-06-06 | 2014-08-20 | 支前明 | Metal extruding, casting and forging forming method and products of method |
| CN106807910A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | Copper mold forges manufacturing process |
| CN108097923A (en) * | 2017-12-31 | 2018-06-01 | 北京航空航天大学 | A kind of differential pressure pressurization casting machine fills the casting device and casting method of type High Pressure Solidification with low pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020143108A1 (en) | 2020-07-16 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |
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| RJ01 | Rejection of invention patent application after publication |