Classification of refractory materials refractory cement
1.Acidic refractories
2.Neutral refractories
3.Basic refractories
Based on method of manufacture
1.Dry press process
2.Fused cast
3.Hand molded
4.Formed (normal, fired or chemically bonded)
5.Un-formed (monolithic-plastic, ramming and gunning mass, castables, mortars, dry vibrating cements.)
6.Un-formed dry refractories.
Precast refractory cement shape design and manufacturing
In order to realize the true benefits to be gained from the use of precast shapes, a thorough knowledge of how the shape system will be used and installed in the field is an absolute requirement during the design phase. The successful design and manufacture of a high-performance refractory shape system requires a unique understanding of refractory materials, manufacturing, anchoring systems, and construction practice. Dimensional tolerances, construction sequencing, lifting and handling capabilities at the site, anchoring facilities, and the actual service demands within the refractory lining environment are all factors that must be well known before the shape is designed.

Precast shape manufacturing inherently requires the use of a mold or pattern to form the shape. There are several methods for mold-making which are routinely employed, and the type of mold construction and materials used depends on the size, complexity, and dimensional tolerances required in the shape, and sometimes the quantity of shapes required. For simplistic shapes with loose dimensional tolerances (+/- 1/16”), plywood forms or metal fabricated forms can be used. Toward the other extreme, some shapes may require extremely tight tolerances, which require the use of a more sophisticated mold made from wood, plastic or metal. These molds may be of the type made by a foundry pattern maker or machine shop.

Another factor in the design of a precast shape has to do with the schedule and sequencing of the actual field installation. The shape design must take into account job accessibility, what other lining components will already be in place when the shapes are to be installed, and how the shape can be handled physically on the job site. Weight and lifting limitations must be considered and planned for, as well as the type of access available into the furnace or vessel. If necessary, lifting lugs or other fixtures can sometimes be incorporated into the shape design.

The design of the anchoring system to be used in the shape is of tremendous importance. In addition to the normal considerations of alloy type and anchor size, the precast shape design must also consider all alternatives for attaching the shape to the structure. Numerous methods can be used, including threaded stud attachments through the wall, welded fixtures, or bolted assemblies.

Perhaps most importantly, the proper refractory material must be selected to suit the demands of the application. Factors such as the desired temperature profile through the lining, expected mechanical stresses, potential chemical attack on the lining, erosion mechanisms, and expansion allowance must all be understood prior to selecting a material to be used in the precast shape.

A well-equipped precast manufacturing facility should include high-energy, large capacity mixers, automated mixing stations with conveyors for material delivery, vibration tables, digitally-controlled water addition, mixing time controllers, and adequate lifting capabilities for large shapes. Firing of shapes is accomplished with a digitally-controlled furnace with burners capable of firing to at least 1300 deg. F. In-house mold/pattern fabrication capabilities and CAD-generated drawings for design assistance should also be expected.

Taurus Refractory ramming mass Factory mainly engaged in professional manufacturer of development, production and sales of the refractory mixture such as melting copper, aluminum and zinc furnace lining. And supply castable refractory for copper smelting, ramming mass for molten copper,fire clay,refractory mortar, refractory cement ,refractory mixture, refractory concrete and silica sand for copper smelting.
Website: http://www.jnrefractory.com  
Contact: Mr. Niu
Tel: +86-371-64372566
Fax: +86-371-64372588
Mobile Phone: +86-15137151612
Email: info@jnrefractory.com
          gyjinniu@163.com
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