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Manufacturing technique for oxygen-enriched side blowing molten pool raw copper smelting and special equipment thereof

A melting pool smelting and production process technology, applied in the field of copper smelting, can solve the problems of coal-fired flue gas exhaustion that aggravates environmental pollution, high energy consumption of closed blast furnaces, and heavy caking of straight-up flue, so as to facilitate large-scale production , good environmental protection effect and compact structure

Inactive Publication Date: 2010-12-15
YANTAI PENGHUI COPPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flash smelting and top-blown bath smelting are foreign patents. The operation is complicated and the investment is huge. The side-blown silver furnace is used in the bath smelting process, which has the disadvantages of large furnace body area, low thermal efficiency, and heavy adhesion of the direct-rising flue. , The depletion process has high energy consumption, high copper content in slag, and low recovery rate. It needs to burn pulverized coal to supplement heat. Pulverized coal combustion requires a separate pulverized coal preparation system and combustion system, which will generate dust pollution and increase the discharge of coal-fired flue gas. Environmental pollution and other issues
Converter blowing technology due to the rotation of the furnace, the air leakage rate reaches 100%, and the low-altitude pollution is serious. Due to the high air leakage rate, the supporting acid-making equipment is particularly large, resulting in an increase in investment
The closed blast furnace has high energy consumption and poor environmental protection effect, and has been listed as an obsolete process by the state
Therefore, the above four processes are complex in operation, huge in investment, high in energy consumption, and poor in environmental protection effects.

Method used

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  • Manufacturing technique for oxygen-enriched side blowing molten pool raw copper smelting and special equipment thereof
  • Manufacturing technique for oxygen-enriched side blowing molten pool raw copper smelting and special equipment thereof
  • Manufacturing technique for oxygen-enriched side blowing molten pool raw copper smelting and special equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: a kind of production technique of smelting blister copper in oxygen-enriched side-blown molten pool (see figure 1 ), including the following steps:

[0044] Copper concentrate smelting:

[0045] According to weight percentage, 75% of copper concentrate, 1% of soot, 6% of fine slag, 8% of quartz stone, 4% of limestone, and 6% of pulverized coal are mixed evenly and then fed into the side-blown furnace from the furnace top feed port through the feed belt. High-pressure (0.18Mpa) oxygen-enriched air (oxygen concentration 45%) is blown into the wind eye to form a violent agitation for the melt in the molten pool, and the mass and heat transfer processes in the molten pool are carried out rapidly, completing a series of chemical reactions and forming Copper matte (grade 65%), slag and high-temperature flue gas (1100°C-1200°C), copper matte and slag flow into the depleted electric furnace continuously through the chute, and the high-temperature flue gas recover...

Embodiment 2

[0050] Embodiment 2: a kind of production technique of smelting blister copper in oxygen-enriched side-blown molten pool (see figure 1 ), including the following steps:

[0051] Copper concentrate smelting:

[0052] According to weight percentage, 80% of copper concentrate, 2% of soot, 2% of fine slag, 4% of quartz stone, 5% of limestone, and 7% of pulverized coal are mixed evenly and fed into the side-blowing furnace through the feeding belt through the feeding port on the top of the furnace. High-pressure (0.17Mpa) oxygen-enriched air (oxygen concentration 38%) is blown into the wind eye to form a violent agitation for the melt in the molten pool, and the mass and heat transfer processes in the molten pool are carried out rapidly, completing a series of chemical reactions and forming Copper matte (grade 58%), slag and high-temperature flue gas (1100°C-1200°C), copper matte and slag flow into the depleted electric furnace continuously through the chute, and high-temperature ...

Embodiment 3

[0057] Embodiment 3: a kind of production technique of smelting blister copper in oxygen-enriched side-blown molten pool (see figure 1 ), including the following steps:

[0058] Copper concentrate smelting:

[0059] 85% of copper concentrate, 4% of quartz stone, 5% of limestone, and 6% of pulverized coal are mixed according to weight percentage. ) Oxygen-enriched air (oxygen concentration 30%) forms violent stirring to the melt in the molten pool, and the mass transfer and heat transfer processes in the molten pool proceed rapidly, completing a series of chemical reactions to form copper matte (grade 50%), slag And high-temperature flue gas (1100°C-1200°C), copper matte and slag flow into the depleted electric furnace continuously from the chute, and the high-temperature flue gas recovers waste heat and sends it to acid production.

[0060] Slag depletion:

[0061] After the copper matte and slag flow into the depleted electric furnace, the slag is clarified and separated f...

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Abstract

The invention disclose a production process for melting blister copper in a bath by side-blowing of oxygen enrichment and special apparatuses thereof, the process comprises the steps of melting concentrate of copper, diluting the slug and air refining copper matte, which is to say, adding the material comprising copper, quartz, limestone and fine coal into the furnace of bath and blowing the highpressure oxygen enrichment air into the furnace, the formed copper matte, slug are ceaselessly flowed into a diluting electric furnace, manufacturing acid after recycling waste heat by smoke gas at high temperature; overheating the slug through an electrode and separating the slug from copper matte to obtain the diluted slug and copper matte which is fed into the continuously-air-refining furnacethrough a chute slipway; reacting the copper matte with arenaceous quartz under the effect of compressed air to obtain the blister copper, performing mineral dressing to the air-refined slug, manufacturing the acid with SO<2>; the invention has less process investment, high heat utilization rate, low energy consumption, good effect of environmental protection, compact apparatus structure, small occupied area, great processing ability, light sticking in air flue, simple operations, diverse measures in adjusting the condition of furnace which is easy to control, high level of mechanization and low labor intensity.

Description

Technical field: [0001] The invention relates to a production process for smelting blister copper in an oxygen-enriched side blowing molten pool and special equipment thereof, belonging to the technical field of copper smelting. Background technique: [0002] At present, the main processes of domestic blister copper production are: flash smelting plus converter blowing; top-blown bath smelting plus converter blowing; closed blast furnace smelting plus converter blowing; closed blast furnace smelting plus continuous blowing furnace blowing. Flash smelting and top-blown bath smelting are foreign patents. The operation is complicated and the investment is huge. The side-blown silver furnace is used in the bath smelting process, which has the disadvantages of large furnace body area, low thermal efficiency, and heavy adhesion of the direct-rising flue. , The depletion process has high energy consumption, high copper content in slag, and low recovery rate. It needs to burn pulver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00
Inventor 孙林权黄文杰姜浩民姜元顺张洪常都立珍刘世武尤廷晏柳庆康王举良
Owner YANTAI PENGHUI COPPER IND
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