Slag cleaning furnace top-blown immersion technology

A depleted electric furnace and submerged technology, applied in the field of depleted electric furnace top-blown submerged jet reduction technology, can solve problems such as low reduction efficiency, hidden safety hazards, and increased copper content in slag, so as to improve reduction efficiency and avoid combustion loss , the effect of avoiding energy loss

Active Publication Date: 2006-02-08
YUNNAN COPPER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, more and more manufacturers have adopted strong oxidation smelting technology, and the negative effect brought by strong oxidation smelting is that magnetic iron oxide is enriched in slag, which increases the viscosity of slag and makes copper and slag difficult to melt in subsequent processes. Separation, the copper content in the slag increases, and nodules are easy to occur in the furnace, which affects the effective use area of ​​the hearth, and even hinders the smooth progress of the depletion electric furnac

Method used

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  • Slag cleaning furnace top-blown immersion technology
  • Slag cleaning furnace top-blown immersion technology
  • Slag cleaning furnace top-blown immersion technology

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1: Without compressed air

[0014] In Figure 1, figure 2 in, 0 # The diesel oil comes out of the oil storage tank 1 and is filtered by the filter 4 or 7. After the oil pump 10, 14, 18 is used to boost the pressure, the pressure is adjusted according to the set flow rate 28 . When the magnetic iron oxide content in the electric furnace slag is 10%, the oil volume of the oil gun is 120 liters / hour, and 3 oil guns are used, 0 # Diesel fuel is supplied to oil gun 33 through metal hose 31 and insulating leather tube 32, 0 # After the diesel oil is pre-ignited, the oil gun is inserted into the molten pool from the top of the furnace body and 34 pairs of magnetic iron oxides are injected into the molten pool to realize the reduction process, and the spray gun is inserted into the melt for 500-800mm. When finishing blowing reduction, first close the solenoid valve 28 or the shut-off valve 26, then open the ball valve 39 and use the compressed air to purge the pipeli...

Embodiment 2

[0015] Embodiment 2: with compressed air. In Figure 1 and Figure 3, 0 # After the diesel oil comes out of the oil storage tank 1 and is filtered by the filter 4 or 7, the pressure is boosted by the oil pump 10 or 14 or 18, and the pressure is adjusted through the pressure control circuit 35, 36, 37, 38 to follow the set flow rate 28, for example, slag When the content of magnetic iron oxide in the medium is 8.5%, the oil volume of the oil gun is 100 liters / hour, using 2 oil guns, 0 # The diesel oil is supplied to the oil gun 33 through the metal hose 31 and the insulating leather tube 32, and the shut-off valve 40 is opened as required to distribute the compressed air, and the air volume is controlled at 600-1100Nm 3 / hour, the allocated compressed air and 0 # Diesel oil is mixed at the gun head, after the mixed oil and gas mixture is pre-ignited, the oil gun is inserted into the melt pool from the top of the furnace, the spray gun is inserted into the melt 500 ~ 800mm, and...

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Abstract

Disclosed is a slag-cleaning furnace top-blown immersion technology which comprises using the oil-gas mixture formed from 0# diesel or 0# diesel and compressed air as the reducing agent, inputting oil amount of the oil spray gun into DCS system, spraying into fondant under the control of an automatic regulating valve, inputting compressed air and regulated wind amount based on deacidizing degree and atmosphere in the furnace, conveying the reducing agent to pipes controlled by the automatic regulating valve, inserting the oil spray gun into the fused bath from the top of the furnace and immersing into the fondant, deacidizing the magnetic iron oxide through blowing the reducing agent into fondant by means of top-blowing pattern. The invention can improve deacidizing efficiency substantially.

Description

technical field [0001] The invention relates to the reduction of magnetic iron oxide (Fe 3 o 4 ) technology, especially a depleted electric furnace top-blown submerged injection reduction technology. Background technique [0002] At present, more and more manufacturers have adopted strong oxidation smelting technology, and the negative effect brought by strong oxidation smelting is that magnetic iron oxide is enriched in slag, which increases the viscosity of slag and makes copper and slag difficult to melt in subsequent processes. Separation, the copper content in the slag increases, and nodules are easy to occur in the furnace, which affects the effective use area of ​​the hearth, and even hinders the smooth progress of the depletion electric furnace process. [0003] At present, the depleted electric furnaces of some domestic manufacturers use solid reducing materials for reduction, but the disadvantages of adding solid reducing materials are low reduction efficiency an...

Claims

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Application Information

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IPC IPC(8): C21B11/10C21B13/12C22B5/12
Inventor 李云刘红斌史谊峰杨小琴杨涛陈忠良张浒桂荣刘明张兴龙
Owner YUNNAN COPPER CO LTD
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