Achieve More Productivity with OPTIMASS - Krohne

Application Story
Top gas mud density measurement in Nova hut a.s.
ISPAT Nova Hut a.s. is one of the largest metallurgic plants in the Czech Republic.
It is an integrated steelmaking concern with a metallurgical production and large
engineering shops. The metallurgical production is of a mass character, the main
products being welded and hot-rolled seamless steel pipes, long products and wire
rod, hot rolled sheets and strips. The engineering production (e.g. steel mining
supports) is geared for batch production. Their coking plant is the largest coke
producer in the Czech Republic.
ISPAT Nova Hut has been using several hundreds of KROHNE magnetic inductive
flowmeters and flow controllers (mainly on water measurements) and additionally
ultrasonic flowmeters (on demineralised water and tar), level radar (blast furnace
stock level, hydrochloric acid level measurement) and mass flowmeters (fuel oil, top
gas and steel sludge measurement). All instruments have been subjected to
demanding operating conditions.
In the blast furnace, during the pig iron production process, a lot of top gas is
generated. The gas (with temperature 200 – 500°C) contains from 30 to 100 g/m3 of
dust. The gas is cleaned with sprinkling water, which then flows into settling basins.
Here the mud settles and then it is pumped first to thickeners and after thickening to a
separator. For the process control it is necessary to know the density of the mud
pumped from basins to thickeners and from thickeners to the separator.
The customer had been using nucleonic density meters for 10 years. These meters
require special approvals and checks and a lot of maintenance. Moreover they could
not be in operation without product flow. For this reason the customer decided to test
2 KROHNE mass flowmeters Corimass MFM 4085 G+ - 1500 G. After 6 months´
testing, 8 pieces of Optimass T50 mass flowmeters were ordered.
Copyright KROHNE, inc. , 2009 OPTIMASS Applications Page No.54