HarbisonWalker International

1305 Cherrington Parkway , 15108 Moon Township, PA
USA

Telephone +1 412 3756600
Info@thinkHWI.com

Trade fair hall

  • Hall 13 / E53
 Interactive Plan

Hall map

glasstec 2016 hall map (Hall 13): stand E53

Fairground map

glasstec 2016 fairground map: Hall 13

Contact

Bryn Snow

Department head/group leader
Marketing, sales, advertising, PR

1305 Cherrington Parkway
15108 Moon Township, USA

Phone
4123756600

Email
bsnow@thinkHWI.com

Our range of products

Product categories

  • 01  Glass production/Production Technology
  • 01.02  Auxiliary and operating materials
  • 01.02.01  Refractories

Our products

Product category: Refractories

ART GLASS

Art glass is often produced by hand by blowing or pressing. Usually the objects are being formed by remelting already-formed glass and fusing different colors together to form new shapes like marbles, stained glass, glassware, or simply art.

There are four basic styles of art glass furnaces, and they vary widely in design and function. They may be used to melt raw batch, cullet, or both. Some will melt only clear glass, while others will melt colors.

The free-standing pot furnace is the most common furnace type. Many small studios use these furnaces because they are easy to construct, and the crucible is easy to replace if it breaks or wears out. GREENCAST®-94 F PLUS, MIZZOU® CASTABLE, and NARCON® MZA CASTABLE are good options for the free-standing pot furnaces.

Some studios prefer the invested crucible furnace design because the pot is much less prone to thermal shock. The backup material also allows the artist to keep working for a period of time after the pot has broken. GREENCAST®– 94 F PLUS, MIZZOU® CASTABLE, and NARCON® MZA CASTABLE products are good options for the invested crucible furnace design.

The day tank is used to melt and contain the molten glass without the use of a crucible. Usually “charged” (filled with batch or cullet) or “banked” (reduced in temperature, but glass is still molten) at night, the term “day tank” refers to the time that the furnace is actually used to produce glass. These types of furnaces require quality glass-contact materials like ZIRMUL® or KORUNDAL XD®. The superstructure may contain KX-99® or NIKE S65W as an upgrade for improved alkali resistance. The crown/gathering port crown/spacer calls for a material that is high in alkali and creep resistance. An andalusite product, such as VERSAFLOW® 57A PLUS, should work well. High-alumina materials, such as GREENCAST®-94 F PLUS, also have a proven track record in this application.

Continuous-melt furnaces are similar to the day tank, but due to the continuous flow of glass, slightly higher-quality materials are required, such as ZIRMUL® or VISION® in the glass-contact applications and NIKE S65W or VISTA® in the superstructure.

INSWOOL®, INSBOARD, GREENTHERM, and KAST-O-LITE® products are also very important to the construction of all types of furnaces.

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Product category: Refractories

Performance. To the Highest Degree.

Our refractory products are made for the toughest environments, the harshest elements, and the biggest challenges. Our products are made to stand up to the intensity of every job. Sweat it? Never. Perform to the highest degree? Absolutely. Set new industry benchmarks? Constantly. Discover why customers the world over rely on HWI’s world-class refractory products.

Did you know HWI is the United States’ largest producer of refractory products and a leader in alumina-silica and basic refractory products? Check out our selection of leading refractory products. Search our wide range of bricks, monolithics, high-temperature insulation materials, fiber, insulating firebrick, and precast shapes. For a closer look, access our product data sheets by registering at our business portal.

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Product category: Refractories

CONTAINER GLASS

Container glass furnaces provide large-scale production of beer bottles, wine bottles, glassware, and other food containers. In these furnaces, the glass will be carried to IS machines via forehearths. Some designs will utilize the regenerator concept (either cross fired or end fired), whereas others will utilize oxy-fuel firing, which eliminates the need for regenerators.

Regenerators utilize checker brick to improve efficiencies by taking advantage of the excellent heat exchange properties inherent in ceramic materials. As the furnace exhausts through the checker packing, the bricks are preheated by the waste gases, providing a source of energy to preheat the combustion air when the cycle is reversed. Regenerator efficiencies can be affected by a variety of factors, from pack design to regenerator size. The materials utilized by the regenerators must be able to withstand many different forms of attacks, such as corrosion by alkalis, silica, and sulfates, as well as thermal shock and creep. The selection of refractories is critical to the operation and life cycle of the regenerator.

Combinations of the NARMAG® family of products, NIKE family of products, and KALA® are used to provide the best-performing regenerator. In the melter construction, the paving consists of AZS materials like VISION®, zircon ram like TZ® 748 RAM MIX, and zircon brick like TZB®, with a clay flux backup material like CRYLA® XXL and insulation like GREENTHERM. Since the sidewalls and breast walls most commonly consist of fused-cast AZS and the crown of silica, zircon is required as a buffer between the possible reaction of the AZS and the silica. TZB® is the industry’s benchmark brand for zircon brick. Forehearths can be either gas fired or electric melted, and some forehearths have the ability to change the color of the glass as it is passed from the melter to the forming machines. Variations in the firing, color, and even the length of the forehearth greatly impact the refractory selection, and zoning is often used to provide the best performance in an economic manner.

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Product category: Refractories

FIBER GLASS

Production of fiberglass is dominated by C-glass and E-glass production. C-glass is also known as “wool” glass and is used in the production of insulation for construction. E-glass has many applications in areas such as aviation, boating, automobiles, and telecommunications. Both of these types of glass require very high temperatures to melt the glass and consist of corrosive elements that attack the refractory lining.

Due to this harsh environment, the highest quality of refractories is required. Chrome-alumina materials are the most common types of refractories used in the melting of fiberglass. Chrome-alumina refractories vary in chromia content from 10 to 95 percent; as the chromia content increases, the performance also increases. Therefore, zoning of the refractory lining in these furnaces is critical.

HarbisonWalker International has the expertise to maximize refractory performance, as well as a full range of chrome-alumina materials under the AUREX® and the SERV® families. In addition, the reclamation of the chrome-alumina refractories is critical to reduce the environmental impact and health concerns. HWI utilizes a REUSE program to convert used chrome-alumina refractories to a synthetic chrome-alumina grain that is incorporated into products like RESERV®.

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Product category: Refractories

FLOAT GLASS

Float glass furnaces use a unique glass-manufacturing method that enables perfectly flat glass to be formed by floating the molten glass on molten tin. These types of furnaces are the largest of all types of glass melters. In order to reduce the amount of energy required to melt the glass, these furnaces have regenerators that utilize checker brick to improve efficiencies by taking advantage of the excellent heat exchange properties inherent in ceramic materials. As the furnace exhausts through the checker packing, the bricks are preheated by the waste gases, providing a source of energy to preheat the combustion air when the cycle is reversed. Regenerator efficiencies can be affected by a variety of factors, from pack design to regenerator size. The materials utilized by the regenerators must be able to withstand many different forms of attack, such as corrosion by alkalis, silica, and sulfates, as well as thermal shock and creep. The selection of refractories is critical to the operation and life cycle of the regenerator. Combinations of the NARMAG® family of products, NIKE family of products, and KALA® provide the best-performing regenerator. In the melter construction, the paving consists of AZS materials like VISION® and zircon ram like TZ® 717-W RAM MIX, with a clay flux backup material like CRYLA® XXL. Since the sidewalls and breast walls most commonly consist of fused-cast AZS and the crown of silica, zircon is required as a buffer between the possible reaction of the AZS and the silica. TZB® is the industry’s benchmark brand for zircon brick.

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Product category: Refractories

TECHNICAL GLASS

Technical glass includes the widest range of glass compositions and applications. This category is best known for the LCD glass used in the production of televisions, cell phones, and tablets.

Other common types of glass are:

Borosilicate glass, used in lighting and labware
Sodium-silicate glass, used in many applications ranging from refractories to toothpaste
Frits, used in paint enamels and other colorant applications
Glass beads, used in reflective paint
Nuclear waste vitrification

Each type of glass-melting operation has its own unique method of forming the glass, and therefore the refractory selection must be customized to fit the needs of the operations.

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About us

Company details

With more than 150 years of industry leadership, HarbisonWalker International (HWI) is the largest supplier of refractory products and services in the United States. Headquartered in Pittsburgh, Pennsylvania, the company’s international network spans North America, Europe, and Asia, with 19 manufacturing plants, 30 global sourcing centers, and technology facilities in both the United States and China. Serving virtually every major industry that requires refractory solutions to enhance production and protect assets, HWI is consistently recognized for its talented experts, industry firsts, and intensely driven excellence.

HWI provides the largest refractory manufacturing capacity to the glass industry in North America. Over 85 years of research and development in the glass market have enabled us to pioneer innovative glass solutions.

Our refractory products provide a competitive edge. We are the only manufacturer to offer CENTAUR technology, a combo-cast block that provides the highest-performing protection while remaining economical. We also introduced JADE®, the first high-thermal shock resistance for hot repairs. JADE® continues to help customers save energy in electric furnaces.

Our dedicated glass application specialists build custom solutions, trouble-shoot issues, develop technical papers, conduct refractories training, and offer a range of consultation services.

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Company data

Sales volume

> 100 Mio US $

Export content

max. 25%

Number of employees

> 500

Foundation

1865

Area of business

Glass manufacture / Production technology

Target groups
  • Solar Glass/Technical Glass
  • Flat Glass
  • Hollow Glass