Knowledge for silica ramming mass/silica refractory mortar

Silica is normally used conventional grades of iron grey,ductile and malleable. It is also used for melting carbon steels with carbon content higher than 0.1% and iron alloys like Ni-harden resist and chrome iron. Temperature control is very essential fro satisfactory lining life. Silica can be used for melting copper and copper alloys including cupronickels with change in amount of binding agent additions. For brasses melting silica lining is the “ideal “choice. He output of brasses is more than a Ton per kg of silica consumed. In Indian currency it works out to be less than 1/1000th of a Rupee for one kg of brass melting.
The silica (SIO2) used as lining is acidic in nature. It is used in powdered condones. The chemical analysis is given in table-It is produced by crushing and grading of good quality quartzite having very purity. The impurities present will produce Unpredictable and more amount of liquid phase at high temperature thereby lowering chemical and mechanical resistance of lining. High purity silica yields more lining life. It also results in considerable uniformity in physical properties.
The more compact lining results in greater strength and life. The compactness (packing density) depends upon granulometric composition of ramming mass/silica refractory mortar. It should be such that it forms the least open space between particles. The typical granulometric compositions of commercial silica ramming mass/silica refractory mortar are shown in Table-3.
TABLE-3: Granulometric composition of commercial silica ramming mass /silica refractory mortar.
Size ramming mass/silica refractory mortar
--4mm to 1mm 33%
--1mm to 0.20mm 30%
--0.20mm to0.06mm 17%
--0.06mm & below 20%
Particular attention should be paid towards the proportion of fines within a certain tolerance. It has adverse influence on the service behavior of lining if present in more amount than required. Since the finest particles mainly takes part in the sintering reaction.

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  
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