Elkem refractories- advanced solutions and support

Case intro to elkem refractories
Elkem Refractories offers high quality microsilica, silicon powders and complementary products for the production of advanced refractory and ceramic products globally. Our products are backed by a highly competent staff for customer service, technical assistance and product development.

Elkem Microsilica®

Amorphous silicon dioxide (silica) consisting of spherical primary particles (average diameter is 0.15 micron) and agglomerates of these (size up to 1 micron). During production and handling secondary agglomerates (5-50 microns) will form. Unlike primary agglomerates, these are easily broken down when the powder is dispersed in a liquid. Specific gravity is about 2.3 and spheres have no internal porosity. Specific surface area is in the range 15-30 m2/g Slightly hygroscopic. Normally an equilibrium value in the range 0.8 – 1.2 % is attained. A range of global grades are available and generally classified according to purity; 971, 968, 955. Other grades are available for local markets.

Silicon Powders

A wide variety of powders to suit customer requirements both with respect to chemistry and sizing. Si-NINE is selected crushed and milled metallurgical silicon. Silgrain® is a range of silicon powders produced by a proprietary hydrometallurgical process.

Complementary products

SioxX® is designed to enhance rheological properties, reduce water demand and increase flow in microsilica-containing low-cement and ultra-low cement castables. SioxX-Quick® is for set-control in microsilica-containing castables and gunite mixes. SioxX®- Zero is developed for microsilica-gel bonded alumina based no-cement castables (NCC) to improve the installation properties (flow, workability, setting behaviour and green strength). SioxX®- Mag is used in cement-free MgO castables based on MgO-SiO2-H2O bond. It improves placement properties (self-flow, workability, setting behavior) and contributes to crack suppression during drying,

Technical service and product development

Well-equipped laboratories dedicated to the characterisation of microsilica and silicon.
Application laboratory for refractories R&D and product development.
Customer service laboratories are situated in Norway, India and China.