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Knauf Insulation Gmbh

Knauf Insulation Doo Skofja Loka

Randy Etzkorn

Bostjan Marolt

David Ducarme

Gerard Demott

Jerry Demott

A submerged combustion melter is arranged with a melting chamber, which may be cylindrical, and at least five submerged combustion burners.

Submerged combustion melters and methods

The present invention relates to a melter assembly () for melting solid raw batch material, which comprises a submerged combustion melter section () and an afterburner section (), wherein the submerged combustion melter section is designed to contain the melt bath () at a maximum melt level (') and comprises at least one submerged combustion burner () and a melt outlet (), and wherein the afterburner section () is designed as a space contiguous with, and in continuity of, the internal space defined by the submerged combustion melter section (), and arranged over the maximum melt level (&#x2032;) of the submerged combustion melter section (). The afterburner section () is dimensioned such that the gases escaping from the melt bath () remain for at least 2 seconds at a temperature of at least 850&#xb0; C. in said afterburner section (), prior to being evacuated to the environment. The invention also relates to a process making use of such melter assembly ().

Submerged combustion melter and method

Vitrified products are manufactured using a melt produced from batch materials comprising 35 to 100 w % man-made mineral fibers produced in a submerged combustion melter.

Process for manufacturing vitrified material by melting

The present invention relates to a process for melting solid batch material, comprising the steps of introducing solid batch material into a melter, and melting the solid batch material in the melter by submerged combustion and subjecting the melt to a flow pattern which when simulated on a computer by making use of common fluid dynamic equations shows a substantially toroidal melt flow pattern in the melt, comprising a major centrally inwardly convergent flow at the melt surface, the central axis of revolution of the toroid being substantially vertical. The invention further relates to a melter assembly for carrying out the process. The toroidal melt flow pattern is achieved by suitable arrangement, angle and spacing of multiple submerged combustion burners in the floor of the melter.

Method and apparatus for melting solid raw batch material using submerged combustion burners

The claims define a submerged combustion melter comprising a submerged combustion burner () comprising three concentric tubes, all being closed at one end and open at the same opposite end, the internal tube () being connected to a source of oxygen containing gas (), the middle tube () surrounding the internal tube () being connected to a source of fuel gas (), and the outer tube () being connected to a source () of oxygen containing gas. The claims are also directed to a method of introducing a flame and/or combustion products into a melt from a submerged combustion burner and also directed to the use of the burner as a submerged combustion burner in a melter.

Melter having a submerged combustion burner, method using the burner and use of the burner

A submerged combustion melteris arranged with a vertical melting chamber, which may be cylindrical, and at least five submerged combustion burners-in the bottom base, the burners so spaced apart from each other and from the walls and angled from the vertical that in use a toroidal flow pattern can be achieved, providing intensive mixing. The claims also pertain to a method of melting a vitrifiable material from solid batch by submerged combustion melting.

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Randy Etzkorn