Kyanite Powder Natural Refractory Mineral

Product name: Kyanite powder
Form: powder
Specification:80 mesh- 325 mesh
Colors: grey and white
CAS No.:1302-76-7

PRODUCT DESCRIPTION
About Kyanite powder: Kyanite is a kind of natural refractory mineral with
high refractoriness and large volume expansion at high temperature. There are
parallel stripes on the crystal plane. Color is light blue or cyan, bright gray
and so on. It belongs to high aluminum minerals. Its chemical corrosion
resistance is strong, thermal shock mechanical strength, heat expansion
irreversible. It is the main raw material for the production of amorphous
materials, electric furnace top brick, phosphate non-fired brick, mullite
brick, low creep brick.

Process characteristics of kyanite powder:
1. Thermal expansibility: The kyanite mineral is converted into a mixture of
mullite and kyanite during heating. During this transformation process, the
mineral expands with volume and forms a good quartzite needle-like network with
volume expansion rate of 16-18%.
2. Stability: the stability of kyanite refractories is 1.5 times higher than
that of clay refractories. The loss of kyanite refractory brick is 43% lower
than that of clay brick, and its life span is 150-200 furnaces longer than that
of clay brick.
3. High refractoriness: general clay refractory refractoriness is 1670-1770 deG
C, and the refractory of kyanite is usually greater than 1790 DEG C, the
highest is greater than 1850 DEG C.
4. Irreversibility: calcination of kyanite into mullite is an irreversible
transformation. It is stable below the temperature of 1810℃. Therefore,
mullite refractories have the characteristics of stable volume at high
temperature, low expansion rate, strong chemical corrosion resistance, high
mechanical strength and strong thermal impact resistance.
 
Kyanite powder Usage:
Because of the characteristics of kyanite mineral, it is used to manufacture
excellent high-grade refractory materials, refractory mortar, cement, casting
resistant products, plastic ramming mixture, technical ceramics, spark plugs
for automobile engines, insulators, ball mill balls, test vessels, earthquake
resistant articles, etc.
(1) high temperature by using kyanite a permanent expansion of monolithic
refractories (added directly, such as pouring material, high temperature
expansion agent can be made of plastic, rubber) as long as add 5% ~ 15% can
improve refractoriness under load, crushing strength of the product improvement
after burning linear change index, elimination of monolithic refractories in
the high temperature and the cooling process of contraction crack, Spalling and
other weaknesses affecting service life # thus prolonging the lining life.
(2) Aluminate fibers produced from high alumina minerals of kyanite can be used
to make parts for automobiles, spaceships and radar.
(3) mullite produced by calcination of kyanite can be used for high temperature
furnace to prolong the furnace life of 5 ~ 6 years and save energy.
(4) adding 5% ~ 15% kyanite in high alumina cement can be made into kyanite
cement, fire resistance temperature up to 1650℃, can be used in military
buildings.
Kyanite minerals are mainly used in the production of refractory materials,
alumina, silicon aluminum alloy and metal fibers.

Contact Us - Hebei Yayang Spodumene Co., Ltd.

Minimum Order: 1 kilograms

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