Rheinkalk Gmbh

Rutgers Chemicals Ag

Rutgers Germany Gmbh

Winfried Boenigk

Rainer Gadow

Christos Georgios Aneziris

Dirk Schnitzler

Matthias Levering

Frank Kern

Claudia Boltersdorf

Dmitry Borzov

Christoph Jacob

Jens Stiegert

Joachim Ulbricht

Christopher Kuhnt

Henri Steinmetz

In a continuous method for production of a semicoke powder with high bulk density and flowability, a sinterable carbon powder (semicoke) is dispersed in water with addition of at least one binder and at least one liquefier, wherein the proportion of carbon in the dispersion is adjusted to at least 50 wt. %, relative to the mass of the dispersion, and the zeta potential of the dispersion is adjusted to less than &#x2212;50 mV, the dispersion is submitted to homogenization and stabilization by continuous wet grinding with a residence time in the mill of less than 3 minutes and the homogeneous dispersion is spray-dried.

Sinterable semi-coke powder with high bulk density

The invention relates to a method for manufacturing carbon-bonded refractory products from refractory granulations and organic binder agents, wherein a powdery, graphitable coal-tar pitch with a benzo[a]pyrene content less than 500 mg/kg and a coking value of at least about 80% by weight according to DIN 51905 and a graphitable binder agent liquid at room temperature, with a coking value of at least about 15% by weight and a benzo[a]pyrene content less than 500 ppm according to DIN 51905, are used as organic binder agent, mixed with the remaining constituents, transferred to a mould body, then heat treated at a temperature of 150 to about 400&#xb0; C.

Manufacture of environmentally friendly carbon-bonded refractory product in the cold mixing process

Growing community of inventors

Lüdinghausen, Germany

Winfried Boenigk