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•  WelcomeIntroduce Yourself! (good place to post pics of work)PUBLICMODERATOR4011Donovan
•  Off-Hand GlassTalk about all things Glass BlowingPUBLICMODERATOR5118Donovan
•  Warm GlassSlumping, Fusing, and Texturizing etc..PUBLICMODERATOR184sunrise refractory
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•  Flame WorkingFlame / Torch WorkPUBLICMODERATOR104Kathleen Elliot
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•  CastingAll about CastingPUBLICMODERATOR85sunrise refractory
•  Equipment BuildingAnnealers, Kilns, Furnaces, Warmers, Benches, etc etc.PUBLICMODERATOR348Donovan
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•      Photographing GlassTalk about Photographing GlassPUBLICMODERATOR00
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•      ClassifiedsWant to sell or buy something? Look here!PUBLICMODERATOR2912Donovan
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LATEST (8) POSTS!

Donovan Brooke

Donovan Brooke
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Go To: Subject: Re: Color Rod for sale
Hi Steve, this forum doesn't have private messaging yet, but I'll email you.

thanks,
Donovan
DATE: GMT - 07/13/2015 | 03:32 AM    

Steve Beckwith


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Go To: Subject: Re: Color Rod for sale
Donovan, it is all still available. Can we PM or something? I'm not ready to post my phone# here in the forum.
DATE: GMT - 07/10/2015 | 09:19 AM    

Donovan Brooke

Donovan Brooke
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Go To: Subject: Re: Color Rod for sale
Hi Steve, I may be interested, but I am responding a bit late. Could you by chance let me know what's left? (you can hit edit on your post to edit it as well if you like).

Thanks,
Donovan
DATE: GMT - 07/10/2015 | 09:02 AM    

Steve Beckwith


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Go To: Subject: Color Rod for sale
Sold!
DATE: GMT - 06/15/2015 | 03:53 PM    

Donovan Brooke

Donovan Brooke
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Go To: Subject: Re: High Alumina Refractory Application In Glass Industry
Okay, while this may be on topic.. I think that is enough posts like this.. we get it.. sunrise supplies these things. :-)

DATE: GMT - 06/12/2015 | 07:15 PM    

juliac121


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Go To: Subject: High Alumina Refractory Application In Glass Industry
Aluminium Oxide or alumina (Al2O3) is one of the most versatile of refractory ceramic oxides and finds use in a wide range of applications. Alumina refractories are the part of alumina- silica group of refractories. Different from fire clay refractories, high Alumina refractories normally have Al2O3 content of more than 45 %.

The raw material base for these refractories are different than the fire clay bricks. For the production of high Al2O3 refractories, both natural raw materials (such as kyanite, sillimanite, andalusite, and bauxite etc.) as well as synthetic materials (sintered mullite, fused mullite, calcined alumina, sintered corundum, and fused corundum etc,) are used.

Alumina (Al2O3) has the physical stability such as melting temperature, hardness, resistance to abrasion, and high mechanical strength. The material has the same chemical composition but have a different crystal structure which is α- Al2O3, β-Al2O3 and γ- Al2O3. The melting point, refractoriness, corrosion resistance and strength of alumina refractories increase with the increase in the Al2O3 content.

Based on the content of alumina, high alumina refractory is classified into 50%, 60%, 70%, 80%, 85%, 90% and 99%.

Refractories with 90 % and 99 % Al2O3 are among the highest strength and erosion resistant refractories. They can be used for temperatures greater than 1800℃。The most widely used alumina refractory with more than 90% Al2O3 content used in glass furnaces is Fused cast Alumina Block and Alumina Bubble block. There are three types of Fused cast Alumina Block: α Alumina, β Alumina and α-β Alumina. Fused cast Alumina Block α Alumina is an ideal product for the lower temperature zones of the glass melting furnaces due to its high density, superior corrosion resistance and low blister potential. β Alumina is the best material for molter crown, port crown, and feeder channel due to its high resistance to alkali vapor and excellent thermal shock resistance. α-β Alumina is widely used in working tank, feeder channels, superstructures and lipstone due to its excellent corrosion resistance against molten glass and no contamination to molten glass under 1350 ℃. Alumina Bubble block has low bulk density, excellent insulating properties and high hot strengths. These features make it an excellent insulating material that can withstand exceptionally high temperatures. It is always used as back-up insulation behind other refractories.

High alumina refractory with about 70% Al2O3 contains mullite as a major phase. It is made of bauxite. It can be used for temperatures greater than 1750℃. Mullite brick and high alumina brick belong to this group. Mullite brick is characterized by good high temperature resistance and good thermal shock resistance, which comes into being mullite through calcine with clay, high alumina materials and ceramics. It is mainly used in fibrous glass furnace. High alumina brick is made of high-quality bauxite clicker. It features high chemical corrosion resistance and high refractoriness. It is usually used in hot areas in glass melting tanks without glass contact.

Refractories containing 50 % and 60 % Al2O3 exhibit improved refractoriness over fireclay products. High alumina insulating brick is a new type of lightweight insulating material which contains approximately 48% alumina,mullite and glass phase or corundum. It has advantages such as high porosity, small volume density, good insulation effect, high mechanical intensity, small thermal conductivity and long service life. It is widely used in insulating layers of glass furnaces. Sillimanite brick is a kind of refractoriness which made by sillimanite and other minerals. And silimanite can be transformed to be mullite under more 1500℃ high temperature. It is mainly used in rider arches, forehearth and bushing for fiber glass furnaces.

Sunrise supplies all kinds of alumina refractories including fused cast alumina block, Alumina Bubble block, Mullite brick, High alumina brick, High alumina insulating brick, sillimanite brick, etc..
DATE: GMT - 06/10/2015 | 08:46 AM    

juliac121


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Go To: Subject: Selection Of Refractory Materials For The Cooling Zone Of Glass Furnaces
The cooling zone is for cooling the glass liquid evenly to the molding temperature. Its structure is similar to that of the melting zone, but the requirement for refractory materials is different.

In the cooling zone, the temperature is lower and the corrosion is not so severe as that of the melting zone. The glass liquid is withdrawn from the tank at the outer end of this zone to the molding zone. Refractory materials used in this zone are required not to contaminate the glass liquid.

As fused cast alumina block α-β does not contain ZrO2, it is not stable at high temperature. However, as it contains only 1-2% glass phase, it has better corrosion resistance than fused cast AZS block under 1350℃, so it is the ideal refractory material for the cooling zone. Fused cast AZS block 33# is also used in this zone. Other refractory materials used include α-β Al2O3 ramming mass and silica brick.

Fused cast alumina block α-β, fused cast AZS block 33# and α-β Al2O3 ramming mass barely produce any blistering or stones and cause no contamination to glass liquid. They are usually used in glass contact areas and other demanding areas.

Fused cast alumina block α-β is generally used in the sidewall and paving block of the refining zone and cooling zone. Under the paving block, α-β Al2O3 ramming mass is used. Then under the two layer, a layer of large fireclay bricks are used.

Fused cast AZS block 33# is used in the glass contact part of the sidewall. The breast wall, the part of sidewall that is not in direct contact with glass liquid, always employs fused cast alumina block α-β.

Except those demanding areas, other parts (crown, suspended wall, channel, etc.)always use silica bricks.

The cooling zone generally achieves the cooling of glass liquid by radiating the heat through its surface, so insulating materials are always not used in this zone except the channel and the tank bottom.
DATE: GMT - 06/09/2015 | 01:00 AM    

sunriserefractory


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Go To: Subject: Fused Cast AZS Brick With Dense Structure For Glass Furnace Use
What's Fused Cast ?
The term Fused Cast refers to a manufacturing process in which the ceramic bonding is obtained by the solidification of a mixture which has been melted in an electric furnace and cast in liquid state into molds.

What does AZS mean?
Fused Cast AZS Brick is also called electro Zircon corundum brick, which is abbreviated as AZS because it contains Al2O3-ZrO2-SiO2. Acording to the different content of Zirconia from 33%-41%, fused cast AZS blocks can be divided into three types AZS—33#,AZS—36# and AZS—41#. Fused cast AZS block is made from pure alumina powder and Zircon sand (composed of 65% zirconia and 34% SiO2). After Alumina powder and zircon sand melting in electric furnace, they are cast into various molds and cool themselves down to become white solid.

Where is Fused cast AZS used?
Fused cast AZS refractory materials are among the best, thus being widely used in the structure of glass melting furnaces. And different types are used in different parts of glass melting furnaces as each type of fused cast AZS has a different corrosion resistance. To give you only one example, the fused cast AZS refractory class containing 36% ZrO2 has an excellent resistance to corrosion. This makes it a very good choice for the glass contact parts of the melters. It is also very effective in paving blocks and side walls. The 17% ZrO2 Super Low Exudation is very good because it allows eliminating the vitreous phase exudation. The result is a higher quality of the glass.

As you can see, each class of materials has its characteristics that make it better for certain processes and terrible for others. Only a team of skilled technicians can thoroughly assess all parameters and recommend the perfect solution for each process.

Zhengzhou Sunrise Refractory Co., Ltd- -AZS series blocks have passed the ISO international certified. High purity raw material, scientific formula, advanced technology and professional guide all contribute to our qualified azs blocks production. Over 30 years producing and marketing experience, we have developed stable customer base overseas and kept long-term cooperation. Need refractories for high temperature furnace fuel? Or any further information, Contact us, We will do our best to help you.
DATE: GMT - 05/08/2015 | 05:45 AM    
 
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