Snref Gas Purging Refractory for Steel Ladle Bottom Gas Blowing

Product Description

SNREF Gas Purging Refractory for Steel Ladle bottom gas blowing

PRODUCT OVERVIEW:
Purging plug, being an important element in high temperature refining metallurgy, having been widely used in many industries, such as iron and steel, ferro alloy, non-ferrous metals etc. We have more than 20 years production experience in purging plug and housing block, with annual production capacity over 50,000 sets.

For many years, we are in the leading position for researching and producing high quality purging blowing products in China. According to years experience of on site inspection, we have successfully developed many types of purging plug, including slit type, segment type(plate type), porous type. Adopting unique forming workmanship, special maintenance method, high temperature firing technology, our purging products come with feature of long service life, high blowing rate, safe and reliable. Our purging products have been widely recognized by domestic and abroad large and medium-sized steel mills with excellent performance feedback.

PRODUCT TYPE AND PERFORMANCE:
With the development of ladle refining technology and ladle lining refractories, higher requirements are imposed on the blowing rate and lifetime of purging refractories. In order to meet the metallurgical needs of different steel types and different refining processes (RH, LF, VD, VOD, VAD, CAS, ANS), we have developed the following series of purging refractories.

-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.

Item	Core	Outer
Al2O3/(%)	≥85	≥85
Al2O3+MgO+Cr2O3 /(%)	≥93	≥90
Bulk density/(g/cm^3)	≥3.0	≥3.0
Porosity/(%)	≤18	≤15
Crushing strength/(MPa)	≥90	≥60
Refractoriness underload/(T0.2,C)	≥1650	≥1650
Ventilation volume(0.4MPa), m3/h	6-50

-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.

Item	Purging Plug		Housing block
	Corundum-Mullite	Corundum-Spinel	Corundum -Spinel
Al2O3/(%)	≥90	≥90	≥90
Bulk density/(g/cm^3)	≥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		-

-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:

1. Simultaneous improving the plugs' thermal shock resistance and erosion resistance.
2. The design of segment(plate) and composition structure obtains good thermal conductivity and low stress characteristic, significantly increase the air blowing rate.
3. Stable flowing rate, good blowing through performance, higher stability in refining process operation.
4. Almost no fracture layer, reducing the labour strength during oxygen cleaning of plugs after casting.
5. 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/cm^3)	≥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		-

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.

Technical Parameter:



Product Drawing & Photos:


Complete set slit purging plug:

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.

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.