SNREF Chromite Corundum Segment Gas Purging Plug for Ladle Argon Blowing
In steel-making today, gas blowing in a ladle is indispensable for improvement of steel quality and for continuous casting.
SNREF purging plug is characterized by their high strength, good erosion resistance and corrosion resistance, high blowing rate and good safety. They are widely used for continuous casting ladles and refining ladles.
-Segment Plug
The segment plug is preferably made of good anti-stripping materials, the block body is not easy to occur fracture, with longer service life. The cracks between different plates will not expand, so this segment plug design can avoid failure of bottom blowing caused by tranverse brick fracture.
Application characteristics: In order to adapt to more and more strict refining conditions(especially special steel), and to meet the requirements of increasing ladle life, the volume of plug becomes bigger and bigger. However the traditional slit type plug has single material and single structure, easy to cause the phenomenon of tranverse fracture and failure of air blowing. Our researched segment plug has successfully soved the problem of fracture existing in traditional slit plug. Significantly increasing the stability of refining process, ensuring the realization and improvement of quality refined steel.
Application characteristics:
1. Resistant to slag
In order to increase resistance ability to slag and liquid steel penetration, Cr2O3 or chromium corundum is always added into corundum spinel. Cr2O3 has the same crystal structure with a-Al2O3, the adding of Cr2O3 can effectively improve the slag resistance ability of materials, also can improve the gas channel blocking condition caused by liquid steel penetration.
The aluminum-chrome solid solution and independent chrome-bearing glass phase which were formed by Cr2O3 fine powder and Al2O3 under high temperature, can form into liquid phase with certain viscosity, when meet with the slag in steel smelting process. This liquid phase can avoid the slag erosion to porous plugs, and also absorb the Iron oxide and magnesium oxide, forming dense spinel on plug's working surface, thus further improve the slag resistance of the plug.
2. Thermal shock resistant
The main damage to porous plug is thermal shock. As the tapping temperature increasing, there existing big temperature gap onto working surface during work and break. After introducing spinel phase into the structure, the thermal resistance of purging plug is increased significantly. The oxide and non-oxide added into porous plug will form into solid solution phase with aggregate under high temperature, which will increase the high temperature strength, air permeability, resistance to slags of the plug. After high temperature burning for the plug, the performance is increased to meet different steelmaking conditions.
-Segment composite plug set
The segment plug is preferably made of good anti-stripping materials, the block body is not easy to occur fracture, with longer service life. The cracks between different plates will not expand, so this segment plug design can avoid failure of bottom blowing caused by transverse brick fracture.
Compared with traditional slit plug, our segment plug obtains below advantages:
- Simultaneous improving the plugs' thermal shock resistance and erosion resistance.
- The design of segment(plate) and composition structure obtains good thermal conductivity and low stress characteristic, significantly increase the air blowing rate.
- Stable flowing rate, good blowing through performance, higher stability in refining process operation.
- Almost no fracture layer, reducing the labour strength during oxygen cleaning of plugs after casting.
- Lifetime much increased, synchronized with the slag line
| Item |
Purging Plug |
Housing block |
| |
Corundum-Mullite |
Corundum-Spinel |
Corundum -Spinel |
| Al2O3/(%) |
≥90 |
≥90 |
≥90 |
| Bulk density/(g/cm3) |
≥2.9 |
≥3.0 |
≥3.0 |
| Porosity/(%) |
≤18 |
≤20 |
≤15 |
| Crushing strength/(MPa) |
≥40 |
≥50 |
≥50 |
| Refractoriness underload/(T0.2,C) |
≥1700 |
≥1700 |
- |
| Ventilation volume(0.4MPa), m3/h |
6-50 |
- |
-Slot Plug(slit plug)
Slot plug is the most common structure in purging plug.
The gas channel could be designed and customized according to actual on-site using conditions, including refining steel grade,
refining workmanship, ladle capacity, temperature, hydrostatic pressure of liquid steel etc.
This can achieve the best blowing effect for purging plugs, ensure the longest service life, safety, stability and best air
permeability.
-Porous plug
Porous plug has better porosity and permeability.
Production technology is adding carbon-containing compound into mixture, since carbon-containing compound can burn out without
residue at low temperature, so we adopt low temperature burning out intermediate materials to get the initial porosity.
In porous type plug, inside distributes interpenetrating gas channels in different sizes.
When blowing stop, the steel and slag from ladle will infiltrate into the deep areas of the plug, to form a secure layer on working surface.
-Hybrid Plug
Secondary refining technology is the most important part in steelmaking process
It can adjust the steel alloy type and liquid temperature.
Purging plug and block is the key functional component to make this process carried out.
As the ladle tends to develop in larger scale, the melting temperature and time have been improved significantly, which makes the
using environment for refractory materials more and more strict. Therefore, it is necessary to further improve the performance of
purging plugs and blocks to meet the increasing demands in current steelmaking technology
-Overall breathable brick:
This product adopts high purity raw materials, through vibration casting and low temperature heating process workmanship.
Function is blowing argon gas via purge plug to ladle.
With the feature of high strength, good thermal stability, erosion resistance and abrasion resistance.
Widely used in steel plants LF, LF-VD, CAS-OB refining ladle
We manufacture various high-quality ladle refractory according to the clients' needs , and to ensure the stability and accountability of the quality.
Company Information
Shandong Sinorefractory New Materials Co., Ltd (SinoRefractory) has been focusing on international marketing of flow control refractories in iron and steel industry for 17 years.
SinoRefractory is the second generation of refractories export enterprise developed out of EMEI Group. Supported by one of China's largest production bases in functional refractory materials.
Through years of development in the field of exporting top quality refractories to worldwide markets, SinoRefractory aims at researching, producing, marketing and exporting high standard Ladle slide gate plate, Ladle Nozzles, Well blocks, Purging plugs, Nozzle stuffing sand, Refractory castables, Slide gate Mechanisms etc.
Up to now, SinoRefractory has supplied high quality refractory products and services to nearly 70 top-hundred global steel enterprises.
SinoRefractory will always put clients'interest in the first place, striving to provide a wide range of services, including technical solution, pre-sales support, after-sales services, installation team support, professional know-how according to the changing of steelmaking condition, etc.
We are not only selling products, we are more focused on supporting, developing and growing together with clients.
Packaging & Shipping
We can provide comprehensive transportation solutions, including
sea freight, express delivery, and air freight.
In terms of sea freight, we can provide reliable transportation for your goods. Whether it's full container load (FCL) or less than container load (LCL), our professional team carefully handles every step of the process, from booking space, arranging correct loading and bundling of goods at the port of origin, to ensuring seamless customs clearance and timely delivery at the destination port.
In terms of express delivery, our express service covers door-to-door pickup and delivery, especially suitable for urgent and small packages that need to arrive quickly and on time.
In terms of air freight, This provides a quick option for transporting your goods.
No matter which mode of transportation you choose, our commitment is to provide you with the highest quality service and ensure the efficient and safe transportation of your goods.
Our Advantages
1. Professional in Technical Support
We have over 100 experienced technical engineers ranging from slide gates to purge plug and NFC, capable of providing comprehensive advice or solution from pre-sales to after-sales procedures.
2.Efficient in Communication
Professional and effective sales team will lower the communication cost to minimum. Getting what you need in shortest time and Supplying what you will need precisely.
3.Strict in Ouality Control
Advanced testing instruments have been set to further increase standards on pre-factory testing. We are striving to reduce the error rate below 0.01%. Making sure each product arrives at customers'warehouse in perfect condition.
4.Forty years production experience
Focusing on producing high quality slide gate refractories ever since 1983, with over 17 years experience in international trading, Fully familiar with complete procedure of exporting and importing.
5.Experienced in after-sale services
The deal is not end of our cooperation, it's just the beginning.Our services just start from cooperation, we will follow the performance and feedback of each delivery.
6.On-Site Follow up
Our team "sales+engineer" is available for on-site follow up in worldwide steel plants. With a direct visit on site, we can offer best solution to steelmakers for saving budge per ton steel.
FAQ
Q 1:How can I receive best materials or products for my application ?
A: Please send drawing and steelmaking condition to us for evaluation.
Our technical team will recommend suitable formula and workmanship,
our sales team will offer most competitive prices accordingly.
Our "Technical+Sales" team will work on to provide optimum product recommendation for clients.
Q 2:Is the recommended life time guaranteed by SNREF ?
A: Taking into comprehensive consideration base on steelmaking situation and SNREF's product experience, we'll
offer recommended life time of products.
However SNREF doesn't guarantee the life time.
For first time cooperation, SNREF recommends a trial order for testing.
Trial order offers us chance to adjust formula base on actual performance.
SNREF will offer best technical support and expedited delivery for trial order.
Q 3:Can SNREF's refractories work well for my system from other brands?
A: With years of experience in exporting. SNREF has successfully provided refractory materials to a wide range of overseas markets including Asia, North Amercia, South America, Middle East, CIS area etc.
We are experienced with various types of systems.
SNREF is capable to offer consistent and high performance refractory materials to clients worldwide.
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