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•  WelcomeIntroduce Yourself! (good place to post pics of work)PUBLICMODERATOR4011Donovan
•  Off-Hand GlassTalk about all things Glass BlowingPUBLICMODERATOR4717Bergkell
•  Warm GlassSlumping, Fusing, and Texturizing etc..PUBLICMODERATOR184sunrise refractory
•  Stained GlassStained Glass TalkPUBLICMODERATOR41nitikasnv
•  EtchingSpecific Talk about Etching GlassPUBLICMODERATOR283Donovan
•  Flame WorkingFlame / Torch WorkPUBLICMODERATOR104Kathleen Elliot
•  EnamelingEnamelingPUBLICMODERATOR113Donovan
•  CastingAll about CastingPUBLICMODERATOR85sunrise refractory
•  Equipment BuildingAnnealers, Kilns, Furnaces, Warmers, Benches, etc etc.PUBLICMODERATOR316pwittmer
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•      Forum SuggestionsNot a place to rant, but a place for useful suggestionsPUBLICMODERATOR94Donovan


registered: GMT - 04/17/2015
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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    


registered: GMT - 04/17/2015
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Go To: Subject: Profile Of A Glass Furnace Which Can Withstand High Temperature
Furnaces consist of three main parts, the melter, refiner and regenerators or checkers. Most furnaces are designed to use natural gas but which also can transform to use fuels-oil, propane and electricity if necessary. The size of furnaces range from about 450 to more than 1,400 square feet of melter surface.

A furnace which is properly operated and well-maintained will last for 10 years or more,and maybe only just need one partial repair. The furnace will produce over 1,000 tons of glass per each square foot of melter surface over the life of the furnace.

The Melter is a rectangular basin in which the actual melting and fining take place. In a side-fired furnace, the batch is charged into the furnace through the doghouse, which is an extension of the melter, protruding from the back wall. Along each side of the melter, above glass level, there are three to seven ports, which contain the natural gas burners ,combustion air and exhaust gases.

The melter basin is separated from the refiner by the bridge wall (throat end wall). Glass passes from the melter to the refiner through the throat, which is a water-cooled tunnel that extends through the bridge wall.

The Refiner acts as a holding basin where the glass is allowed to cool to a uniform temperature before entering the forehearths. The melter and refiner are covered by crowns to contain the heat.
DATE: GMT - 05/07/2015 | 05:33 AM    


registered: GMT - 04/17/2015
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Go To: Subject: How To Choose A Good Refractory For Glass Furnace Using?

There are many kinds of refractory products, when we try to choose refractory products, we may always think which one is the best for our furnace? In fact, we should know that it is not always the higher price the better, what matters is that choose the cost effective ones, thus we can get good quality refractory products with competitive price and also help to save some money. Here are some suggestions for your reference while you choose refractory products.

1. Refractoriness of high-temperature kilns: Refractoriness of 1580-1770 degrees select ordinary refractory, refractoriness of 1770-2000 select advanced refractory, refractoriness above 2000 degrees you need choose grade refractories. Even the same furnace, different part of a furnace is required different fire brick.

2. Chemical property: In general, there are three kinds of refractories which are acid refractories, neutral refractories, alkali refractories,. In order to avoid unnecessary loss, we should make sure that the refractory we choose for our furnace can not produce chemical reaction to the material we produce.

3. Different industry and different position : Many industries need refractory and different industries have different requirements for refractory, even the same industry and the same furnace, different position of a furnace is required different fire brick.

4. Pre-assemble performance: Pre-assemble is needed to provide by refractory manufacturers, which can calculate the required specifications and quantity of refractories. At the same time we can ask the refractory manufacturer to provide refractory samples, thus can avoid shoddy version.

5.Manufacturer: There are thousands of refractory manufacturers at present market. Normally you will choose some famous refractory manufacturer, but at the same time you will undertake high risk, as you usually can not get price concessions,and maybe you can not get the good understanding and service from the manufacturer. However, some refractory manufacturers who is probably not famous, if only they have ISO certification and long history established factory, they can also guarantee the same quality, what’s more this manufacturer can give you price concessions. So what is really important is that choose the cost effective.

6. Service: The most important thing when select a refractory manufacturer is whether they have good before and after sales who can provide professional technical advice. If it is convenience, you can directly go to visit the factory of refractory manufacturers.
DATE: GMT - 05/06/2015 | 06:31 AM    


registered: GMT - 04/17/2015
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Go To: Subject: The Development Of Glass Furnace
A glass furnace is a specialized furnace that used in glass production. Raw materials are heated together in a glass furnace to their melting point, when they fuse into molten glass, this liquid can then be formed into the shapes, then cools and solidifies.

Glass making can be dated back thousands of years. Glass appears to have been produced as far back as 1500 BC by the Egyptians and perhaps the Phoenicians. Glass using and manufacturing developments have gone through an interesting evolution throughout human history, influenced by many cultures including those in Africa, China and Europe.

Most early glass was formed through glass blowing, Glass blowing was invented during the 1st century BC by the glassmakers of Syria. This revolutionary technique made glass production easier and quickly, so glass blowing quickly became a favorite glass made method. Even it is early, but the processes were complicated, because blown glass generally takes a round shape. Some sheet glass was made by cutting and shaping glass cylinders, a process that had to be completed quickly after the glass was removed from the glass furnace. The process was imperfect, and the quality of the panes varied greatly until better industrial processes were created in the 20th century

In glassblowing, molten glass is contained in a specially shaped glass furnace. The glassblower collects a quantity of liquid glass on a hollow rod, and then causes the glass to expand by blowing air through the unheated end of the rod. The glassblower keeps the glass at optimum temperature by working quickly and by reheating the glass in a glory hole, a special opening in the glass furnace for this purpose. Once formed, the glass is placed in another special glass furnace so it will cool slowly to room temperature without breaking, a process called annealing.

Modern industrial glass manufacturing works on much the same principles, just on a larger scale. Sheet glass or window glass is made by heating chemicals in a glass furnace, then delivering the molten glass onto the surface of a river of molten tin or other metal; this process is known as float glass, because the glass “floats” on the surface of the metal. The liquid metal has a perfectly level surface, and the glass imitates this property as it slowly cools. Pressurized nitrogen keeps the top surface of the glass level, and rollers allow for a range of thicknesses. Once the glass has annealed, it can be cut into sheets or panes by special machinery.
DATE: GMT - 05/05/2015 | 05:25 AM    


registered: GMT - 04/17/2015
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Go To: Subject: What is casting technology?
Casting is a 6000 year old process which is widely applied to many industries, such as metal, plastic and resign,in addition, casting is also used in glass industry. Casting method is applied to produce fire bricks which is used in the glass furnace. As this method can produce bricks which have less shrinkages, high density, long using life, high temperature resistance and strong anti-corrosion to galss liquid. So casting is widely used in producing glass.

Casting manufacturing process is that by melting the material into liquid, and then pouring the liquid material into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify, then through cleaning and inspection. The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process. Casting materials are usually metals or various cold setting materials that cure after mixing two or more components together; examples are epoxy, concrete, plaster and clay. Casting is most often used for making complex shapes that would be otherwise difficult or uneconomical to make by other methods.

According to the quantity of shrinkages, casting can be divided into below four styles:
1.PT-normal casting, the shrinkage voids of brick are formed under the casting scar.

2.QX-tilt casting, the shrinkage voids of brick are located at the rear bottom side, and a complete dense zone forms at the opposite end.

3.ZWS-end casting, this casting method is similar with WS, merely a few shrinkage voids remain in upper part of the body.

4.WS-void free casting, the zone where the shrinkage voids located is cut off, no shrinkage voids left in brick.
DATE: GMT - 05/04/2015 | 07:33 AM    

Donovan Brooke

Donovan Brooke
registered: GMT - 05/09/2007
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Go To: Subject: Re: Welcome
Hi Kevin, welcome. This forum is fairly slow, but still active. I plan on updating it in the future to a more contemporary look. What part of the world do you work with glass in?


DATE: GMT - 01/27/2015 | 04:40 AM    


registered: GMT - 01/27/2015
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Go To: Subject: Re: Welcome
newbe here just started blowing glass this past fall
DATE: GMT - 01/27/2015 | 03:59 PM    

Jennifer Bergquist

registered: GMT - 04/27/2014
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Go To: Subject: Re: Buyers PLease beware!!!! I would hate for anyone else to go through the same thing.
No I'm afraid not. They communicated for the first few months, but then they stopped when we kept asking where our product was. They first started by blaming Emhart(refractory company). We then called Emhart and they said electroglass has never paid them for the product. They also explained to us they we are not the first customers of theirs to call and wonder where there product is. Visa is trying to get our money back as well as the BBB.
I'm afraid i have lost so much money on studio rental time.
DATE: GMT - 01/08/2015 | 03:12 PM    
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