Aga Ab

Linde Aktiengesellschaft

Gartz, Mats

Mats Gartz

Tomas Ekman

Ola Ritzén

Anders Lugnet

Andrew Miller Cameron

Sten Ljungars

Ola Ritzen

Andy Cameron

A method for heating a blast furnace stove includes combusting a fuel with a lower heating value (LHV) of 9 MJ/Nmor less in a combustion zone which is arranged in a combustion chamber in the stove, and causing the combustion gases to flow through and thereby heat refractory material in the stove. The fuel is combusted with an oxidant including at least 85% oxygen, and combustion gases are recirculated into the combustion zone for diluting the mixture of fuel and oxidant therein sufficiently for the combustion to be flameless.

Method for heating a blast furnace stove

A method and apparatus for heating a sheet-like material to a predetermined temperature profile along the length and across the width of the material. The sheet-like material is transported within a furnace relative to at least one burner holder above or below, or above and below, the material. Each burner holder includes a number of direct flame impingement burners located side-by-side in a row. The burners are directed toward the sheet-like material, and the individual burners in each burner holder are oriented and controlled so that heat output from the burners provides the predetermined temperature profile within the sheet-like material.

Method and apparatus for heating a sheet-like product

Method for homogenizing the heat distribution as well as decreasing the amount of NOin combustion products when operating an industrial furnace with at least one conventional burner using air as an oxidant. An additional oxidant including at least 50% oxygen gas is caused to stream into the furnace through a lance. The total amount of oxygen supplied is balanced against the amount of fuel being supplied through the air burner. Firstly, the combination of at least 40% of the supplied oxygen is supplied through the additional oxidant, the lance is arranged at a distance from the air burner of at least 0.3 meters, and the additional oxidant streams into the furnace through the lance with at least sonic velocity, and secondly the additional oxidant is supplied only when the air burner is operated at a certain lowest power or at a higher power.

[object Object]

A method for igniting a fuel/oxidant mixture in an industrial furnace. At least one fuel supply conduit and at least one oxidant supply conduit is provided, each conduit having an opening that opens on a side of the burner head that faces the furnace interior space. Fuel and oxidant are supplied to the burner head, and a light detector for detecting ultraviolet light, or other light wavelengths, is provided for detecting light that indicates the presence of a flame. A laser is positioned to emit a laser beam onto a point on the burner head adjacent the conduit outlets and to heat that point to a temperature exceeding the ignition temperature of the fuel/oxidant mixture. When the burner has ignited, the detector emits a signal to a control circuit that extinguishes the laser beam.

Method for igniting a burner

A method for the heat treatment of extended steel products such as, for example, rods, pipes, work pieces, etc., while the products are in motion. The products () are caused to be heated by DFI burners (--) (where 'DFI' is an abbreviation for 'direct flame impingement'), which burners are caused to be located such that one set of burners (), () essentially covers the circumference of the products, and in the burners are caused to be located integrated into arrangements (-) that transport the product in a direction that is perpendicular to a plane in which the flames of the burners essentially lie.

Method for the heat treatment of extended steel products

Each one of the side edges () of a door () is arranged to run inside and along a respective tube () that has a longitudinal slit () and extends vertically, in that each tube is fixed in relation to the furnace, in that the tubes () are designed to spring back towards a respective position in which the slit () is closed, and arranged to enclose the side edge () of the door () along essentially the whole length of the side edge () when the door () is in its closed position, and in that a liquid coolant is arranged to stream through the tubes () and essentially fill up the whole space defined by the combination of the inner surfaces of each tube () and the outer surfaces of the respective side part of the door ().

Growing community of inventors

Sollentuna, Sweden

Mats Gartz