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Ilkka Veikko Kojo

Risto Saarinen

Pekka Hanniala

Ari Jokilaakso

Eero Hugg

Teuvo P Hanniala

Erkki Krogerus

Pertti M&auml;kinen

Kaarle Peltoniemi

Markku Kytö

Markku Lahtinen

Heikki Olavi Savolainen

Patricio Barrios

Enrique Delgado

Raimo Koota

Francisco Miralles

A method for providing a suspension smelting furnace with constant and continuous feed is disclosed. The method employs intermediate storage bins for fine-grained feed, a feed rate controller for accurately controlling the feed rate of the fine-grained material, and a pneumatic conveyor for lifting the feed up to the top level of the suspension smelting furnace where the burner of the furnace is adapted. The heavy constructions of the storage bins are located close to the ground level and the constructions around and on top of the furnace have been designed essentially lighter than in conventional solutions.

Supply system for suspension smelting furnace

A supply system for providing a suspension smelting furnace with constant and continuous feed is disclosed. The installation of the invention comprises intermediate storage bins for fine-grained feed, a feed rate controller for accurately controlling the feed rate of the fine-grained material, and a pneumatic conveyor for lifting the feed up to the top level of the suspension smelting furnace where the burner of the furnace is adapted. In the installation, the heavy constructions of the storage bins are located close to the ground level and the constructions around and on top of the furnace have been designed essentially lighter than in conventional solutions.

The invention relates to a method for increasing the capacity of a waste-heat boiler () processing gases obtained from a metallurgic smelting furnace, such as a flash smelting furnace, and for reducing dust accretions, where liquid is added into the waste-heat boiler () of the smelting furnace. The invention also relates to an apparatus for increasing the capacity of a waste-heat boiler () processing gases obtained from a metallurgic smelting furnace, such as a flash smelting furnace, and for reducing dust accretions, in which case the waste-heat boiler is provided with at least one nozzle () for adding liquid.

Method and apparatus for increasing the capacity of a waste heat boiler in a metallurgic smelting furnace

The invention relates to a melt launder () comprising a bottom and edged, said melt launder being particularly meant to be used for tapping a molten phase, such as slag, from a smelting furnace, which melt launder is manufactured of copper or copper alloy and provided with cooling channels (), so that at the bottom () of the melt launder (), there is arranged at least one groove ().

Melt launder

The present invention relates to a method and equipment, whereby matte with a high non-ferrous metal content and disposable slag are produced simultaneously in a suspension-smelting furnace from non-ferrous sulphide concentrate. According to the invention, a carbonaceous reducing agent is charged to the lower furnace of a suspension smelting furnace via tuyeres to the part of the furnace which has a reduced cross-sectional area.

Method and equipment for smelting non-ferrous metal sulphides in a suspension smelting furnace in order to produce matte of a high non-ferrous metal content and disposable slag

The invention relates to a bottom structure of a suspension smelting furnace to be used in a smelting furnace (), in the reaction space () whereof of sulfidic raw material containing metal, such as copper, nickel or lead, is smelted in the presence of an oxygen-bearing gas and slag-forming agent, in order to render the metal in a form that is advantageous for further treatment, and where the created molten phases () are settled onto the bottom () of the smelting furnace in order to separate the molten phases form each other, when the temperature of the molten phases is within the range 1150-1450&#xb0; C. According to the invention, the bottom structure includes at least one arched lining layer () inclined in the longitudinal direction of the smelting furnace, so that the temperature on the surface (that is opposite to the surface that gets into contact with the molten phase is below 800&#xb0; C.

Bottom structure for a smelting furnace

The present invention relates to a method, whereby the non-ferrous metal content of the slag generated in the production of non-ferrous metals such as copper or nickel in a suspension smelting furnace is reduced by charging metallurgical coke, with a size ranging from 1-25 mm, into the furnace. Baffles can be positioned from the roof of the furnace downwards, by means of which small particles containing copper and nickel are prevented from drifting to the back of the furnace and being tapped with the slag. The baffles force the small particles to settle in the reduction zone of the furnace.

Method for reducing non-ferrous metal content in slag in the production of non-ferrous metals occurring in suspension smelting furnace

The invention relates to a method for the manufacture of a composite cooling element for the melt zone of a metallurgical reactor, whereby the element is manufactured by attaching ceramic lining sections to each other by copper casting and forming at the same time a copper plate equipped with cooling water channels behind the lining. The invention also relates to composite cooling elements manufactured by this method.

Method for the manufacture of a composite cooling element for the melt zone of a metallurgical reactor and a composite cooling element manufactured by said method

The invention relates to a method of fabricating a pyrometallurgical reactor cooling element with flow channels. In order to enhance heat transfer capability, the wall surface area of the flow channel, which is traditionally round in cross-section, is increased without increasing the diameter or length of the channel.

Pyrometallurgical reactor cooling element and its manufacture

This invention relates to equipment for the feed of pulverous material to a concentrate burner of a suspension-melting furnace, so that the feed of solid finely divided material into the furnace is distributed evenly in the concentrate burner. According to the invention, a vibrating feeder is located between the raw material conveyor and the actual burner, and the concentrate burner feed pipes are equipped with blades for distributing the material.

Equipment for the even feed of pulverous material to a concentrate burner of suspension smelting furnace

The invention relates to an apparatus for the suspension smelting of sulfidic, finely divided raw materials containing metals, such as copper, nickel and lead, by using oxygen enrichment. In this method into the suspension smelting furnace (1) there is fed the raw material (4,5) to be smelted together with flux (6) and oxidizing gas (7) and the walls (18) of the reaction space of the suspension smelting furnace are cooled and at least two molten phases created (16,17). According to the invention the degree of oxygen enrichment of the oxidizing gas is at least 40% in order to raise the temperature of the particles in suspension to at least 200.degree. C. higher than the temperature of the gas phase of the suspension, in order to improve the reaction kinetics of the reactions taking place in the reaction space, and that the thickness of the reaction space wall lining is adjusted, according to the production quantity of the suspension smelting furnace, by means of cooling elements (20) manufactured by draw casting and installed in the wall of the reaction space.

Apparatus for suspension smelting

The invention relates to a method and apparatus for feeding reaction gas and solids into a suspension smelting furnace, which apparatus comprises at least conduits for receiving reaction gas and solids and for further conducting them into a suspension smelting furnace, and in which apparatus at least the major part of the reaction gas is fed into the suspension smelting furnace through a reaction gas channel surrounding the solids feeding channel. According to the invention, in the reaction gas channel, essentially near to its end on the side of the suspension smelting furnace, there are installed adjusting members whereby the flow rate of the reaction gas fed into the suspension smelting furnace can be adjusted essentially steplessly.

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Kirkkonummi, Finland

Ilkka Veikko Kojo