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Reducing agent for slag cleaning furnace top-blown immersion blowing reduction

A technology for depleting electric furnaces and reducing agents, applied in the field of reducing agents, can solve problems such as harm to human health, waste oil is not reused, and carcinogenic, so as to improve the level of resource utilization and harmless treatment, and accelerate the reduction reaction power. learning, the effect of reducing production costs

Active Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention uses liquid reducing agents such as diesel oil, but the consumption of diesel oil per ton of depleted slag is more than 2L, thereby increasing production costs
[0006] As all kinds of low-quality oil in daily life, part of waste oil is recovered by unscrupulous traders, and then refined into counterfeit cooking oil and flows into the dining table, which can cause food poisoning, even cancer, and seriously endanger human health.
Even if it is not refined into edible oil, the waste oil will also cause: (1) After the ditch is blocked, the waste water will flow sideways, which is easy to stink and seriously affect the environment; , preservatives for building materials, release agents, etc.), resulting in a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The reducing agent used for depleting electric furnace top-blown submerged jet reduction, the reducing agent is filtered and dehydrated waste oil (with a water content of 5%).

[0017] The specific steps for using the reducing agent are as follows: First, the reducing agent is sent to the pipeline controlled by an automatic regulating valve with a temperature of 40°C and dehydrated waste oil (with a water content of 5%), and then through the pipeline connected to the pipeline. 1. Top-blowing the reduction oil gun inserted from the top of the depleted electric furnace and submerged in the slag layer of the molten pool, so that the temperature in the electric furnace slag is 1250°C and the magnetic iron oxide undergoes a reduction reaction for 4 hours. Among them, when the content of magnetic iron oxide in the electric furnace slag reaches 9%, the oil volume of the reduction oil gun is controlled to 100 liters / hour. Insert a reducing oil gun to the position in the furnace...

Embodiment 2

[0019] The reducing agent used for depleted electric furnace top-blown immersion injection reduction is an oil-gas mixture formed by filtering and dehydrating waste oil (water content 9%) and high-pressure nitrogen gas at a volume ratio of 1:600.

[0020] The specific steps of using the reducing agent are as follows: First, the oil-air mixture reducing agent formed by filtering and dehydrating waste oil (with a water content of 9%) and high-pressure nitrogen at a volume ratio of 1:600 ​​at a temperature of 50°C is sent to the automatic regulating valve. In the controlled pipeline, the reduction oil gun connected to the pipeline, inserted from the top of the lean electric furnace and immersed in the slag layer of the molten pool is top-blown, so that the temperature in the electric furnace slag is 1290 ° C. After 8 hours of reduction of magnetic iron oxide reaction. Among them, when the content of magnetic iron oxide in the electric furnace slag reaches 9%, control the amount o...

Embodiment 3

[0022] The reducing agent used for the top-blown immersion injection reduction of the depleted electric furnace is an oil-gas mixture formed by filtering and dehydrating waste oil (with a water content of 8%) and high-pressure nitrogen at a volume ratio of 1.25:200.

[0023] The specific steps of using the reducing agent are as follows: First, the oil-air mixture reducing agent formed by filtering and dehydrating waste oil (with a water content of 8%) and high-pressure nitrogen at a volume ratio of 1.25:200 at a temperature of 45°C is sent to the automatic regulating valve. In the controlled pipeline, the reduction oil gun connected to the pipeline, inserted from the top of the lean electric furnace and immersed in the slag layer of the molten pool is top-blown, so that the temperature in the electric furnace slag is 1280 ° C. After 6 hours of reduction of magnetic iron oxide reaction. Among them, when the content of magnetic iron oxide in the electric furnace slag reaches 11....

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Abstract

The invention relates to a reducing agent for slag cleaning furnace top-blown immersion blowing reduction, and belongs to the technical field of fire method metallurgy. The reducing agent for slag cleaning furnace top-blown immersion blowing reduction is filtered dehydrated waste oil or an oil gas mixture formed from filtered dehydrated waste oil and high pressure nitrogen in a volume ratio of (1-1.25): (200-600). First, the reducing agent of filtered dehydrated waste oil or oil gas mixture formed from filtered dehydrated waste oil and high pressure nitrogen into a pipeline controlled by a self adjusting valve; then a reduction oil gun connected with the pipeline, inserted from the top of the slag cleaning furnace and immersed in a molten pool slag layer is used for top-blown, so that magnetic iron oxide in the electroslag is subjected to a reduction reaction. The invention realizes high-efficiency, low-cost and resource utilization of the waste oil, increases reduction efficiency of the reducing agent and reduces production cost of slag depletion.

Description

technical field [0001] The invention relates to a reducing agent for top-blown submerged jet reduction of a depleted electric furnace, belonging to the technical field of pyrometallurgy. Background technique [0002] In non-ferrous smelting, the oxygen-enriched enhanced smelting technology is more and more widely used, which will inevitably enrich the magnetic iron oxide in the slag, increase the viscosity of the slag, and is not conducive to the separation of copper and slag in the subsequent process, resulting in an increase in the copper content of the slag. high. In order to improve the recovery rate of copper, the slag after oxygen-enriched enhanced smelting must be further depleted to reduce the copper content in the slag. [0003] At present, in the pyrometallurgy process of copper, the methods of depleting smelting slag mainly include slow cooling flotation method and smelting depletion method. The slow cooling flotation method has poor economic benefits due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B11/10C21B13/12C22B5/14C22B15/00
Inventor 王华朱道飞王冲胡建杭王仕博魏永刚
Owner KUNMING UNIV OF SCI & TECH
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