What does Harbison Walker do?

HarbisonWalker International (HWI) is the largest supplier of refractory products and services in the United States, and one of the largest in the world. The company employs nearly 2,000 people globally. Prior to renaming in 2015, HWI was ANH Refractories Company. Its family of companies included A.P.

What does Harbison Walker make?

refractory products
We deliver one of the industry’s widest, deepest lines of refractory solutions. Our world-class refractory products perform to the highest degree. And by bringing intensity, reliability, and passion to work every day, we’re able to provide superior value to our customers and their businesses.

Who owns Harbison Walker?

Ultimately this company was merged into Dresser Industries in 1967. NRHP reference No. The company was part of the Fortune 500 from 1955 until 1967. In 2015 a successor company in Pittsburgh adopted the Harbison-Walker name and brand as its own.

What is Kruzite?

A high purity, mullite bonded, bubble alumina insulating brick. English. KRUZITE®-70. A 70% alumina brick.

What is the refractory industry?

Refractories are ceramic materials that are essential for all high-temperature industrial processes because they provide mechanical strength, protection against corrosion, and thermal insulation.

What is refractory construction?

Refractory materials are those that can withstand high temperatures without the heat damaging their structure, resistance, or thermal conductivity. In the case of bricks, the chemical composition of refractories is different from that of regular bricks, which also influences their color and thermal conductivity.

How do you treat refractory cement?

The refractory should be allowed to cure for approximately 24 hours before firing. This is an important time, and the longer you can wait, the better. As with concrete, keep the surface from drying out by covering with a wet cloth or burlap if the weather is hot or dry.

What do refractory workers do?

A refractory worker aids in the construction and repair of refractory equipment. A refractory bricklayer or refractory mason also works to build ovens and other structures for containing heated materials such as molten metal. Masons bond bricks or other equipment with specialized mortar.

What is a refractory engineer?

Common job titles include refractory technician, refractory worker, and refractory bricklayer. A refractory technician designs high-temperature equipment and heating structures using heat-resistant elements such as minerals, ceramic, and brick components.

What is refractory material made of?

Refractories are ceramic materials capable of withstanding high temperatures. The bulk of refractory materials consist of single or mixed high melting point oxides such as silicon, aluminum, magnesium, calcium and zirconium.

What are the requirements of a good refractory?

A good refractory should have high RUL value. It is defined as the ratio of its pore volume to the bulk volume. Porosity is an important property of refractory bricks, because it affect many other characteristics like chemical stability, strength, abrasion- resistance and thermal conductivity.

How much water do you add to refractory cement?

Add 142 mL (5 oz.) of clean water to every 1.36 kg (3 lbs.) of dry-mix. Allow to air dry for 24 hours prior to final curing.