CN109530618A - A kind of preparation method of the fire grate bar on sintering pallet - Google Patents
A kind of preparation method of the fire grate bar on sintering pallet Download PDFInfo
- Publication number
- CN109530618A CN109530618A CN201910015606.5A CN201910015606A CN109530618A CN 109530618 A CN109530618 A CN 109530618A CN 201910015606 A CN201910015606 A CN 201910015606A CN 109530618 A CN109530618 A CN 109530618A
- Authority
- CN
- China
- Prior art keywords
- fire grate
- grate bar
- mould part
- furnace charge
- liquid
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/061—Materials which make up the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/062—Mechanisms for locking or opening moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/065—Cooling or heating equipment for moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The preparation method for the fire grate bar that the present invention provides a kind of on sintering pallet, after raw material prepared furnace charge needed for fire grate bar will be prepared, liquid is melted in high temperature, after purification slagging-off, furnace charge is applied pressure to it under the conditions of furnace charge is full liquid to solidify to obtain material base, is finally punched material base.The preparation method of fire grate bar of the invention, process flow is short, and high production efficiency, dust is few, and production environment is friendly；The fire grate product size and mechanical stability being prepared are good, and can realize zero-fault inside fire grate bar substantially, and mechanical mechanics property is far superior to the fire grate bar of conventional cast.
Description
Technical field
The present invention relates to a kind of preparation method of steel plant-scale equipment easily worn part, in particular to a kind of sintering pallet
On one of easily worn part fire grate bar preparation method.
Background technique
Steel mill sintering mill (plant) is an important link of steel production.Iron concentrate and solid fuel are mixed, led to
The high temperature close to 1300 degree is crossed, the agglomerates of sintered pellets of steel-making is obtained, this is the groundwork of steel mill sintering mill (plant).Iron concentrate and solid
Fluid fuel is all located on pallet, is supported by trolley fire grate bar.Therefore, temperature of the trolley fire grate bar at 200 ~ 800 DEG C
It is heated to spend alternation in range, secondly CO, CO in sintering atmosphere2、SO2Oxidation is generated to fire grate bar with vapor, burn into washes away
Effect, requires fire grate bar that can not only withstand the violent alternation and acid and alkali corrosion of temperature in this way, also to have enough mechanical strong
Degree.The service life of trolley fire grate bar seriously affects the production efficiency and quality of agglomerates of sintered pellets.Currently, it is resistance to generally use chromium nickel
Hot steel produces fire grate bar by the process of conventional cast, but the technique of this conventional cast, and not only production process is more,
The uncontrollable factor of production process is more, and waste residue is easy to produce in production process, and waste liquid etc. makes the disagreeableness substance of environment
Fire grate bar lead to that loss is serious, service life is short and performance is bad because of cinder hole, stomata, fracture and peeling etc., affect burning
The production efficiency and production cost of tying workshop seriously affect the benefit of steel mill.
Summary of the invention
The present invention is intended to provide a kind of preparation method of the fire grate bar on sintering pallet, can be reduced inside fire grate bar
Defect improves the mechanical property of fire grate bar.The present invention is realized by the following scheme:
A kind of preparation method of the fire grate bar on sintering pallet, raw material prepared furnace charge needed for fire grate bar will be prepared
Afterwards, it is melted to liquid in high temperature, after purification slagging-off, applies pressure to furnace charge solidification to it under the conditions of furnace charge is full liquid
Material base is obtained, material base is finally punched.
Stressed process more optimal solution is applied to liquid furnace charge are as follows: will be through melting --- the liquid furnace charge after purification slagging-off
After 1600 ~ 1650 DEG C are poured into mold and stand at least 5 seconds, is molded by applying stressed device, keep 200 ~ 400 tons of conjunction
Molding pressure is solidified to pressure 10 ~ 20 seconds to the liquid furnace charge that liquid furnace charge applies at least 300 tons again after 5 ~ 10 seconds.Later, it is opened
And the material base ejected, then it is punched the material base after solidification.The application pressure apparatus generally uses four-column hydraulic press etc..
Used mold, structure is similar with existing fire grate bar, is composed of upper mould part and lower mould part, upper mold
Component is connect by First piston bar with the stressed component of applying from top to bottom for applying pressure apparatus, and lower mould part passes through second
Piston rod is connect with the stressed component of applying from lower to upper for applying pressure apparatus；Upper mould part passes through with lower mould part to be connect
The connection such as bar, thimble, the middle position of upper mould part is upper mold core, and the center of upper mold core is the spreader in back taper, and upper
The corresponding middle position in lower mould part in the complete position of mold core is lower mold core, and is provided with material chamber in the center of lower mold core,
When upper mould part and lower mould part are assembled into mold, material chamber and spreader are coupled；Cooling is furnished in the periphery of material chamber and spreader
The material of water pipe, upper mold core and lower mold core is heat resisting steel.
Fire grate bar is a kind of heat resisting steel material, and this material carbon content is low, alloy content is high, reaches 20% or more, is melting
After, the mobility of liquid furnace charge is excessively poor, and pouring temperature requires height, and at 1600 DEG C or more, this liquid furnace charge is at 300 tons
Above pressure solidification, this is a technique difficult to realize, because will not be generally selected in the industry using of the invention this
Apply the liquid forging process of big pressure forming under the conditions of liquid, although this technique is used for the processing system of many metal parts
It makes, but never this applies intensified pressure under the conditions of liquid using of the invention in the preparation process of fire grate bar at present
Molding liquid forging process.
Compared with prior art, the present invention having the advantage that
1. the preparation method of fire grate bar of the invention, process flow is short, high production efficiency, the fire grate product size being prepared
It is good with mechanical stability.
It is in process of production, useless not as original conventional cast 2. the preparation method of fire grate bar fire grate bar of the invention
Sand generates, and not as the bruting process of original conventional cast, dust is few, and production environment is friendly.
3. fire grate bar prepared by preparation method of the present invention is used, due to being held in liquid furnace charge process of setting by device
Continuous pressurization can realize zero-fault inside fire grate bar substantially, and the tensile strength of fire grate bar is in 700MPa or more, and elongation percentage rate is 15
~ 20%, using identical Charging stock recipe using conventional casting methods preparation fire grate bar, tensile strength between 400-600MPa,
Elongation percentage is less than 10%, the defects of there are a large amount of holes for inside.The method of the present invention prepares fire grate bar mechanical mechanics property and is far superior to
The fire grate bar of conventional cast.
4. mold employed in preparation using heat resisting steel material, and cooperates circulating cooling water pipe in its core part,
It can ensure that mold materials use within a reasonable temperature range.
Detailed description of the invention
The structural schematic diagram of 1 mold of Fig. 1 embodiment.
Specific embodiment
Embodiment 1
Pallet fire grate bar is prepared according to the following steps:
(I) raw material used in manufacture fire grate bar are melted to liquid after composition proportion, after standing refining slagging-off repeatedly, in
1600 DEG C are come out of the stove；
Above-mentioned liquid furnace charge is poured into mold in (II) 20 second, after 5 seconds, the master slider of four-column hydraulic press is molded with it, molding
350 tons of power；For mould structure as shown in Figure 1, being composed of upper mould part 1 and lower mould part 2, upper mould part 1 is living by first
Stopper rod 3 is connect with the feeding cylinder of four-column hydraulic press, and lower mould part 2 is connected by the liftout tank of second piston bar 4 and four-column hydraulic press
It connects；Upper mould part 1 is connect with lower mould part 2 by connecting rod, thimble, and the middle position of upper mould part is upper mold core 1-1, upper mold
The center of core is the spreader 1-1-1 in back taper, the interposition in lower mould part 2 corresponding with the complete position upper mold core 1-1
Setting is lower mold core 2-1, and is provided with material chamber 2-1-1 in the center of lower mold core 2-1, is assembled into upper mould part 1 and lower mould part 2
When mold, material chamber 2-1-1 and spreader 1-1-1 are coupled；Cooling water pipe is furnished in the periphery of material chamber 2-1-1 and spreader 1-1-1
The material of 5, upper mold core 1-1 and lower mold core 2-1 are heat resisting steel.
Start four-column hydraulic press pressing member after (III) 10 second, applies 300 tons of pressure to the liquid furnace charge solidified；
(IV) it after being solidified to liquid furnace charge within pressure maintaining 10 seconds, is opened and simultaneously ejects material base；
(V) it is punched material base, fire grate bar product is made.
The fine and closely woven cleaning of fire grate bar product surface, non-scale, be placed in metallography microscope under the microscope, it is possible to find interiors of products without
Any defect, crystal grain is fine and closely woven uniformly, and through mechanics properties testing, the tensile strength of product is 800MPa, elongation percentage 16%.Using
Identical Charging stock recipe and use conventional casting methods preparation fire grate bar, for tensile strength between 400 ~ 600MPa, elongation percentage is small
In 10%, it is placed in metallography microscope and finds the defects of there are a large amount of holes inside this fire grate bar under the microscope.
Embodiment 2
Pallet fire grate bar is prepared according to the following steps,
(I) raw material used in manufacture fire grate bar are melted to liquid after composition proportion, after standing refining slagging-off repeatedly, in
1640 DEG C are come out of the stove；
Above-mentioned liquid furnace charge is poured into mold in (II) 20 second, using the identical mold of embodiment 1, after 5 seconds, four columns are hydraulic
The master slider of machine is molded with it, and 250 tons of mold clamping force；Mould structure as shown in Figure 1,
Start four-column hydraulic press pressing member after (III) 6 second, applies 350 tons of pressure to the liquid furnace charge solidified；
(IV) it after being solidified to liquid furnace charge within pressure maintaining 15 seconds, is opened and simultaneously ejects material base；
(V) it is punched material base, fire grate bar product is made.
The fine and closely woven cleaning of fire grate bar product surface, non-scale, be placed in metallography microscope under the microscope, it is possible to find interiors of products without
Any defect, crystal grain is fine and closely woven uniformly, and through mechanics properties testing, the tensile strength of product is 700MPa, elongation percentage 15%.
Embodiment 3
Pallet fire grate bar is prepared according to the following steps,
(I) raw material used in manufacture fire grate bar are melted to liquid after composition proportion, after standing refining slagging-off repeatedly, in
1650 DEG C are come out of the stove；
Above-mentioned liquid furnace charge is poured into mold in (II) 20 second, using the identical mold of embodiment 1, after 10 seconds, four columns are hydraulic
The master slider of machine is molded with it, and 400 tons of mold clamping force；
Start four-column hydraulic press pressing member after (III) 10 second, applies 500 tons of pressure to the liquid furnace charge solidified；
(IV) it after being solidified to liquid furnace charge within pressure maintaining 20 seconds, is opened and simultaneously ejects material base；
(V) it is punched material base, fire grate bar product is made.
The fine and closely woven cleaning of fire grate bar product surface, non-scale, be placed in metallography microscope under the microscope, it is possible to find interiors of products without
Any defect, crystal grain is fine and closely woven uniformly, and through mechanics properties testing, the tensile strength of product is 900MPa, elongation percentage 20%.
Claims (3)
1. a kind of preparation method of the fire grate bar on sintering pallet, it is characterised in that: original needed for fire grate bar will be prepared
After material prepared furnace charge, liquid is melted to after purification slagging-off in high temperature and applies pressure to it under the conditions of furnace charge is full liquid
Power to furnace charge solidifies to obtain material base, is finally punched material base.
2. the preparation method for the fire grate bar on sintering pallet as described in claim 1, it is characterised in that: described is complete
The step of applying pressure under the conditions of liquid is, by liquid furnace charge after 1600 ~ 1650 DEG C are poured into mold and stand at least 5 seconds, leads to
It crosses and applies the molding of stressed device, keep 200 ~ 400 tons of clamping pressure, after 5 ~ 10 seconds, then to liquid furnace charge apply at least 300
The pressure 10 ~ 20 seconds of ton to liquid furnace charge solidifies.
3. the preparation method for the fire grate bar on sintering pallet as claimed in claim 2, it is characterised in that: used
Mold is composed of upper mould part and lower mould part, upper mould part by First piston bar with application pressure apparatus on toward
Under apply the connection of stressed component, lower mould part is stressed by second piston bar and applying from lower to upper for application pressure apparatus
Component connection；Upper mould part is connect with lower mould part by connecting rod, and the middle position of upper mould part is upper mold core, upper mold core
Center is the spreader in back taper, and the middle position in lower mould part corresponding with the complete position of upper mold core is lower mold core, and
It is provided with material chamber in the center of lower mold core, when upper mould part and lower mould part are assembled into mold, material chamber and spreader are coupled；?
The periphery of material chamber and spreader is furnished with cooling water pipe, and the material of upper mold core and lower mold core is heat resisting steel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015606.5A CN109530618A (en) | 2019-01-08 | 2019-01-08 | A kind of preparation method of the fire grate bar on sintering pallet |
| PCT/CN2019/076964 WO2020143107A1 (en) | 2019-01-08 | 2019-03-05 | Preparation method for grate bar for sintering machine trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015606.5A CN109530618A (en) | 2019-01-08 | 2019-01-08 | A kind of preparation method of the fire grate bar on sintering pallet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109530618A true CN109530618A (en) | 2019-03-29 |
Family
ID=65834557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910015606.5A Pending CN109530618A (en) | 2019-01-08 | 2019-01-08 | A kind of preparation method of the fire grate bar on sintering pallet |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109530618A (en) |
| WO (1) | WO2020143107A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020143108A1 (en) * | 2019-01-08 | 2020-07-16 | 长沙威尔保新材料有限公司 | Grate bar for pallet car of sintering machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803340A (en) * | 2006-01-23 | 2006-07-19 | 北京交通大学 | Preparation method of two-directional chapiter blank for coal mine supporting and protection, and its mould |
| 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 |
| CN104611634A (en) * | 2014-12-31 | 2015-05-13 | 桃江新兴管件有限责任公司 | Grate bar material of trolley of sinter machine and production method of grate bar material |
| CN105689685A (en) * | 2016-03-25 | 2016-06-22 | 北京交通大学 | Liquid forging die and method for crusher jaw plates |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605055A (en) * | 1984-10-19 | 1986-08-12 | Economy Industrial Corporation | Method and apparatus for casting ferroalloys and slags in moulds having a large ratio of mould mass to cavity size |
| CN103849819B (en) * | 2012-12-04 | 2016-03-30 | 上海梅山钢铁股份有限公司 | A kind of sinter machine fire grate bar material and production method thereof and composite pouring unit |
| KR101858705B1 (en) * | 2016-12-21 | 2018-05-16 | 주식회사 포스코 | Grate bar with improved life cycle, and method for manufacturing the same |
| CN108302930A (en) * | 2017-04-18 | 2018-07-20 | 马鞍山市新越机械修造有限责任公司 | Louver drying bed grate bar and smelting production method thereof |
| CN108531831B (en) * | 2018-05-18 | 2020-01-21 | 山东泰山钢铁集团有限公司 | Material and method of multicomponent alloying high chromium cast steel for grate bar |
| CN108955258A (en) * | 2018-09-29 | 2018-12-07 | 湖南华菱湘潭钢铁有限公司 | Steel produces sintering machine fire grate bar |
-
2019
- 2019-01-08 CN CN201910015606.5A patent/CN109530618A/en active Pending
- 2019-03-05 WO PCT/CN2019/076964 patent/WO2020143107A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803340A (en) * | 2006-01-23 | 2006-07-19 | 北京交通大学 | Preparation method of two-directional chapiter blank for coal mine supporting and protection, and its mould |
| 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 |
| CN104611634A (en) * | 2014-12-31 | 2015-05-13 | 桃江新兴管件有限责任公司 | Grate bar material of trolley of sinter machine and production method of grate bar material |
| CN105689685A (en) * | 2016-03-25 | 2016-06-22 | 北京交通大学 | Liquid forging die and method for crusher jaw plates |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020143108A1 (en) * | 2019-01-08 | 2020-07-16 | 长沙威尔保新材料有限公司 | Grate bar for pallet car of sintering machine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020143107A1 (en) | 2020-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102259159B (en) | Process for casting crank shaft | |
| CN102189245B (en) | Lost foam casting technological method for casting double-metal double-liquid composite crusher hammer | |
| CN100519002C (en) | Aluminum-alloy wheel gas pressure casting apparatus and casting method thereof | |
| CN102688998B (en) | Method for producing double-clutch valve | |
| CN105215314A (en) | A kind of auto parts machinery pressure casting method | |
| CN105624571B (en) | A kind of super-thick steel plate and its production technology | |
| CN105200276B (en) | A kind of pseudo- alloy enhancing composite material piston manufacture method with inner-cooling oil recess | |
| CN103752837A (en) | Method for producing water atomized alloy powder by using reduced iron of smelting slag | |
| CN101279359A (en) | Method for manufacturing compound core low-segregation large-sized hollow steel ingot | |
| CN109530618A (en) | A kind of preparation method of the fire grate bar on sintering pallet | |
| CN201223926Y (en) | Casting apparatus for composite core low aliquation large-sized hollow steel ingot | |
| CN107779736A (en) | A kind of alloy cast iron and its preparation method and application | |
| CN107214318A (en) | A kind of metal liquid die forging process system | |
| CN104475683A (en) | Process method of lost-foam casting double-liquid compound crusher hammer | |
| CN102689135A (en) | Method for machining red copper contact, contact finger and contact base type part of high-voltage switch | |
| CN102994718B (en) | Method for preparing gate valve disc through casting molding | |
| CN101457308B (en) | Method for preparing phosphor-copper intermediate alloy | |
| CN107983929A (en) | A kind of heating furnace cobalt alloy cushion block semi-solid die casting process | |
| CN206936321U (en) | A kind of combining structure of metal liquid die forging | |
| CN100482898C (en) | Process for manufacturing end plate for use in pretensioning method prestressed concrete pipe pile | |
| CN101108417A (en) | Manufacturing technique of electroslag smelting casting complex abrasion-proof hammer | |
| CN105170951B (en) | A kind of Bidirectional-squeezing formula heavy slab directional freeze method and its device | |
| CN103509965A (en) | Process for smelting aluminum-iron bronze | |
| CN114932202B (en) | Casting method of large-tonnage die casting machine template casting | |
| CN109628734A (en) | A kind of fire grate bar for sintering pallet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190329 |