A steel producer with its own pelletizing plant chose silicon carbide over metal for its dust collector.
Iron ore dust is about as hard on a cyclone tube as dust gets.
This plant took the metal out of its multicyclone
A steel producer that runs its own iron ore pelletizing plant moved its mechanical dust collector from metal to SiClone components cast in silicon carbide. The ceramic inlets, spin vanes and outlet tubes are cast to the dimensions of the collector already in place and replace metal parts that wore through in the abrasive dust stream.
Pelletizing turns iron ore fines into hardened pellets for the blast furnace or direct reduction. The off gas carries fine ore and pellet dust, and a multicyclone is a common first stage to take it out.
The cyclone tubes do their job by spinning the gas, so the dust slides along the tube wall at a flat angle, always in the same zones. Cast iron and hard alloy tubes thin out there until the spin breaks down and dust passes through.
When the dust is harder than the metal around it, every new set of metal tubes starts the same countdown, so the plant changed the material instead of the replacement schedule.
SiClone components are cast silicon carbide parts for mechanical dust collectors: inlet tubes, spin vanes and outlet tubes in the sizes of the common multicyclone designs, with 6, 9, 12 and 24 inch tubes as standard. They go into the existing tube sheets.
For abrasive dust Blasch uses ALTRON, an alumina bonded silicon carbide whose abrasion resistance comes close to dense technical ceramics, or OXYTRON, an oxide bonded silicon carbide.
A chemical producer chose a complete SiClone collector for its process gas. SiClone in a chemical plant
Silicon carbide inlets, spin vanes and outlet tubes for mechanical dust collectors.
ALTRON, the grade for heavy abrasion from hard particles.
No. The silicon carbide parts are cast to fit the existing collector design and tube sheets.
For hard, abrasive dust Blasch uses ALTRON alumina bonded or OXYTRON oxide bonded silicon carbide. The choice depends on particle size, velocity and temperature.
They are lighter, at about a third of the weight of steel parts, which helps in a cramped housing during an outage.
Send the collector make and size, the tube diameter and what the dust contains. A Blasch engineer suggests a grade and checks the fit with your tube sheets.
