Copper-smelting thermal slag iron-extracting process and device

A technology of copper smelting and slag, which is applied in the field of copper smelting hot slag iron extraction process and equipment, can solve the problems of waste of iron resources, energy waste, and non-recycling of iron, so as to save energy and cost, save equipment investment and land occupation area effect

Active Publication Date: 2010-05-12
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the two treatment methods of hot furnace slag in copper smelting are: first, the heat of hot furnace slag i

Method used

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  • Copper-smelting thermal slag iron-extracting process and device
  • Copper-smelting thermal slag iron-extracting process and device
  • Copper-smelting thermal slag iron-extracting process and device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1:

[0034] figure 1 It includes the furnace body. The furnace body is divided into two zones with upper and lower retaining walls: the first molten pool 14 is the copper depletion zone and the second molten pool 15 is the iron reduction zone; in the first molten pool 14 is provided with a hot copper slag feeding port 1 and a matte discharge port 10, and a nitrogen pipe 2, a fuel burner 4, an electrode 3 and a solid feeding port 16 are provided on the upper part of the first molten pool 14; in the second molten pool 15 An oxygen port 8 and a nozzle port 13 are provided, a solvent feed port 17 is provided at the top, a slag discharge port 11 is provided on the side, and a molten iron discharge port 9 is provided at the lower part. The second molten pool 15 is in communication with the flue 12.

[0035] The two bath flue gas zones are connected, and the flue gas heat in the reduction zone and the depletion zone can be complementary.

[0036] The lower retaining wall in...

Example Embodiment

[0038] Example 2:

[0039] figure 2 It includes the furnace body. The furnace body is divided into two zones with upper and lower retaining walls: the first molten pool 14 is the copper depletion zone and the second molten pool 15 is the iron reduction zone; in the first molten pool 14 is provided with a hot copper slag feeding port 1 and a matte discharge port 10, and a nitrogen pipe 2, a fuel burner 4, an electrode 3 and a solid feeding port 16 are provided on the upper part of the first molten pool 14; in the second molten pool 15 There is an oxygen port 8, a solvent feed port 17 and a spray gun 7 on the top. The spray gun 7 sprays industrial oxygen and oxygen-enriched air, coal powder and quicklime. A slag discharge port 11 is provided on the side of the second molten pool 15. The lower part is provided with a molten iron discharge port 9; the second molten pool 15 is in communication with the flue 12.

[0040] The two bath flue gas zones are connected, and the flue gas heat...

Example Embodiment

[0043] Example 3:

[0044] In the whole smelting process of the present invention, the hot slag of copper smelting completes the depletion of copper extraction and reduction of iron in the same furnace, and the copper extraction is carried out in the first molten pool, which is the copper depletion zone, and the electrode arc or fuel is used to provide heat energy , Stir with nitrogen to make the fine copper matte particles collide and grow, and settle and separate. The depleted slag automatically flows into the second molten pool, that is, the iron reduction zone, where coal, quicklime, and oxygen-enriched air are injected by side blowing or top blowing to achieve reduction of iron.

[0045] Industrial oxygen is injected into the upper part of the liquid surface of the second molten pool to achieve CO secondary combustion. The combustion heat is absorbed by the slag spray through conduction and radiation and then carried into the melt to maintain the thermal balance of the melt.

...

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Abstract

The invention discloses a copper-smelting thermal slag iron-extracting process and a device. The copper-smelting thermal slag is processed in a same furnace to deplete copper and reduce iron. The copper extraction is performed in a first furnace hearth (copper depleting area). Electrode arc or fuel is used for supplying heat. Small matte particle is impacted to grow up by stirring with nitrogen to realize settlement separation. The depleted slag automatically flows into a second furnace hearth (iron reducing area). Coal, quicklime and oxygen-enriched air are blown in from side or top to reduce iron. The invention has the advantages that copper and iron are sufficiently recycled from the copper-smelting slag, the recycling rate of copper is more than 90%, the recycling rate of iron is more than 95%, heat of thermal slag is sufficiently used, the energy source and the cost are saved, the copper extraction and the iron extraction are realized in a same furnace, and the equipment investment and the floor space are both saved.

Description

technical field [0001] The invention relates to the technical field of copper and iron and steel metallurgy, in particular to a process and device for extracting iron from copper smelting hot slag. Background technique [0002] At present, the hot slag produced by various copper smelting methods contains more than 0.6% Cu and more than 40% Fe. At present, the focus of copper smelting slag recovery in the world is on the recovery of copper, and there is no recovery of iron in the slag. There are two main ways to recover copper from slag: the first is to reduce the Cu content in hot slag to less than 0.3% by various methods, and then water quenching to produce fine-grained black sand, which is used for anti-corrosion sand blasting and rust removal or discarded; The second method is to recover the copper in the slag by beneficiation after slow cooling of the hot slag, and discard the tailings containing Cu less than 0.30% produced after the beneficiation. The main disadvantage...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C21B11/00
CPCY02P10/20
Inventor 周松林
Owner YANGGU XIANGGUANG COPPER
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