The issue concerning possibility to save expensive liquid oil through usage of pulverized coal as additional fuel during the blast furnace process existed already in the 70s. The decisive impulse for this emerged in 1979 in the research department of  Maxhütte Unterwellenborn from which “E.S.C.H. GmbH” was established in 1992.
In February 1983, the first plant for pulverized coal injection in compliance with the KOSTE-technology was put into operation on the blast furnace II in Maxhütte Unterwellenborn.  Due to high reliability and bright production performance achieved in a short-term period, the second plant was set already in April 1985. 
 

A new generation of filter and homogenizing bottoms

Since that time “E.S.C.H. GmbH” has been engaged in pneumatic transportation of powder and bulk solids. A special technology of sand and synthetic resin tamping was implemented for production of partial sections of bottom and side fluidization in feeding vessels, lock hoppers and bins.  It allowed producing high-strength filter bottoms or filter elements with diameter up to 600 mm and smooth flat surface.

Filter tamping mass can be used at vessels’ descending conical bottoms due to the specially developed layer technology.  Filter bottoms with diameter up to 4000 mm, which were produced in compliance with this method can be also used as unloading bin bottoms, distributor bottoms as well as homogenizing bottoms. Heavy loads can be carried due to the bottoms’ robust construction. Smooth surface and equal distribution of fluidizing gas through the bottom provide an optimal material discharge. The applied technology makes possible development of new filter bottoms as well as modernization of available bins and vessels.

It is possible to produce filter bottoms with temperature resistance up to 300 °C for the special usage.
 

Pneumatic transportation plant

Our concept

Reliable and innovative decisions for plants, which were specially worked out and optimized in compliance with transported material and customer’s requirements.

Advantages

Optimal plant configuration

• for minimal consumption of transportation gas
• transportation speed corresponding to requirements
• minimal wear

High plant reliability and insignificant maintenance cost via

• usage of high-quality sensors
• pneumatic regulation of transported material flow
• multible dosing and equal distribution in case of rejection from mechanical dosing units
• usage of ceramic regulating equipment with high wear-resistance
   

Usage

Pneumatic transportation or dosing including powders with high abrasive effect, wear-sensitive granulated materials, fine powder, heterogeneous and heavy transported materials

• coal and coke powder
• Si and SiC granulate
• granulates produced by spray-drying
• alloying materials
• sands
• agglomerate from mixed plastic waste
• sewage sludge granulate
• filter dust
• steel shop dust
• saw dust

Possibility of application

• injection of waste products into blast furnaces and cupolas
• silicium injection into aluminum melting
• sand transportation in foundry
• coal injection for slag foaming in electric arc furnaces
• multiphase coal dosing for burners and blast furnaces
• transportation of converter coarse dust in steel shops
• multiple additive dosing for waste gas treatment
• dosing of granulated casting flux powder on crystallizer of continuous casting
   

Offer of services

• Complex systems and plants engineering
• Supply of turnkey-plants, mounting
• commissioning, plants maintenance

© Copyright 2011 E.S.C.H. GmbH