Room#1802,Political Building,#469 West XinHua Road,Zhuzhou City,Hunan
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Maximizing Refractory Service Life
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| Maximizing Refractory Service Life | ||
| Thermal cycling, thermal shock, mechanical impact or vibration can
all cause cracking, which in turn can lead to premature failure and
substantial cost penalties.Achieving maximum refractory service
life at a minimum cost is therefore a key element in the efficient
operation of these processes, and in enabling companies to maximize
their competitive edge. The addition of Sunshine Melt Extract steel fibers to castable, gunning and moldable refractories inhibits crack formation (Figure 1) and transforms the conventional refractory from a brittle material to a tough and tenacious composite (Figure 2) exhibiting dramatic improvements in service life. | ||
| Zhuzhou Nanfang Steel Fiber Co., Ltd is the refractory industry's No. 1 supplier of stainless steel fiber and is dedicated to product development and customer service. | ||
| The Best Choice for Casting and Gunning | ||
| Melt Extract stainless fibers are fully annealed and therefore are
more pliable and ductile. This is of particular benefit during the
mixing cycle and when the refractory composite is installed. These pliable fibers are not only more user friendly than the stiff "needle-like" cut fibers, but also have better flow characteristics. Dispersion is further aided by the optimum Aspect Ratio design guaranteeing rapid fiber separation during the mixing phase. | ||
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| 50% Less Rebound | ||
| Melt Extract steel fiber fiber also has a major influence on the cost of the sprayed linings. On impact with a sprayed surface, the majority of ductile fibers contained within a mix stay in place, whereas a high proportion of the stiff drawn wire fibers rebound, resulting in a very expensive waste material. Rebound loss of RS fibers is typically 50% less than that of drawn wire fibers. | ||
| Perfect Refractory-Fiber Bond | ||
| The rough cast surface texture and irregular profile of Melt Extract steel fiber guarantees "mechanical interlock" with the refractory matrix (Figure 3). The unique "kidney shaped cross-section" (Figure 4) provides a higher specific surface area for bonding than round or flat fibers, and is free of surface lubricants which are often present on chopped wire and slit sheet fiber and which prevents bonding. | ||
| Superior Resistance to High Temperature Corrosion | ||
| Melt Extract stainless steel fibers are spun directly from the melt
using the company's advanced Melt Extraction (ME) and Melt Overflow
(MO) processes. Rapid cooling of the fiber during manufacture
(equivalent to 50,000 per second) "freezes" the metallurgical
structure, capturing it in an optimum state to resist high
temperature corrosion - a state which is impossible for
conventionally cast steel to match. The processing maximizes the effective distribution of the primary nickel and/or chromium alloying elements throughout the fiber while simultaneously minimizing grain size. When coupled with Sunshine’s skill of blending non-standard levels of performance-enhancing key trace elements to the melt, a unique range of dedicated refractory fiber alloys have been produced which provide outstanding oxidation resistance and unmatched performance at elevated temperature (Figure 5). | ||
| Fiber Size | ||
| The normal diameter of stainless steel fiber is 0.3mm~0.7mm with a
length of 20~60mm. To avoid agglomeration during sirring, the ratio
of the length to the diameter shoud be controlled in the range of
30~80. It should be noted that if a process of jet spray is
applied, stainless steel fiber of a shorter length <25mm should
be selected, otherwise the spray jet shall be blocked. |
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