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Supply system for suspension smelting furnace

A suspension smelting furnace and reaction furnace technology, applied in furnaces, vertical furnaces, furnace components, etc., can solve the problems of heavy structure and large investment in the intermediate silo, and achieve the effect of eliminating material supply interruption, low investment and light structure

Active Publication Date: 2008-08-13
METSO OUTOTEC (FINLAND) OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the height of the melting furnace exceeds 20 meters, the construction of the intermediate silo will be heavy and require a large investment

Method used

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  • Supply system for suspension smelting furnace
  • Supply system for suspension smelting furnace
  • Supply system for suspension smelting furnace

Examples

Experimental program
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Embodiment Construction

[0020] exist figure 1 In the shown arrangement, a dry mixture of metal concentrate and flux is fed into silo 10 via conduit 48 . The outlet 46 of the silo is adapted to convey the concentrate mixture into the loss-in-weight feed controller 11 . Screw conveyor 14 conveys the precise mass flow of concentrate mixture into pneumatic conveyor 12, which is a dilute phase pneumatic conveyor. A pneumatic conveyor 12 conveys the concentrate mixture upwards to a concentrate nozzle 13 of a suspension smelting furnace 16 . Such as figure 1 As shown, the outlet 46 of the silo 10 is substantially lower than the top of the reaction shaft 15 and the concentrate nozzle 13 . The soot is sent into the feed bin 17. The feed rate of concentrate mixture and soot must be carefully controlled. Thus, the soot is fed into a feed rate controller 18 which conveys a controlled mass flow of soot into the pneumatic conveyor 12 via the screw conveyor 19 . The flow of concentrate mixture and soot is con...

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PUM

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Abstract

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.

Description

technical field [0001] The present invention relates to a supply system for supplying fine-grained material to a suspension smelting furnace. In particular, it relates to a method and apparatus for supplying a metal concentrate comprising fine-grained material to nozzles of a suspension smelting furnace. Background technique [0002] Suspension smelting is a method of producing mattes or metals from fine-grained metal concentrates, such as copper, nickel or lead concentrates. Typically, a suspension smelting furnace consists of: a circular vertical reaction shaft for roasting and smelting suspended dry concentrate; a sinker bottom for collecting molten droplets and separating matte or metal from slag; and a waste gas and the rising flue of smoke. [0003] The smelting of metal concentrates mainly takes place in vertical reaction shafts. Metal concentrate, oxygen-enriched air and slagging agent, that is, flux, are added to the reaction furnace through the top of the furnac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B23/02C22B5/14F27DF27D3/18
CPCC22B5/14F27B1/20F27D3/0025C22B15/0047F27D3/0033C22B15/00C22B23/02
Inventor I·科乔
Owner METSO OUTOTEC (FINLAND) OY
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