Oxygen-enriched blowing device and method thereof

An oxygen-enriched and supporting device technology, applied in the field of smelting, can solve the problems of affecting the blowing efficiency, increase the labor intensity of workers, complicated operation, etc., and achieve the effects of shortening the blowing time, long service life and reducing labor intensity.

Active Publication Date: 2015-09-02
铜陵四通环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology controls the generation of foamy slag to a certain extent, it has disadvantages: on the one hand, the oxidation reaction of copper liquid can only be completed through the oxygen exchange between the slag layer and copper water during blowing operation, which affects the blowing efficiency; On the other hand, the operation is cumbersome. We need to change the blowing gas at any time according to the oxygen pressure and the inner layer wind pressure. Moreover, the smelting workers need to keep alternately adding cold or hot matte, and according to the melt in the furnace. The thickness of the layer changes the position of the spray gun, which undoubtedly increases the labor intensity of the workers

Method used

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  • Oxygen-enriched blowing device and method thereof
  • Oxygen-enriched blowing device and method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 , figure 2 As shown in the oxygen-enriched blowing device, the oxygen-enriched blowing device includes a blowing lance 1 and a lance supporting device 2. The blowing lance 1 includes a blowing gas pipe 3, a lance outer pipe 4, and a middle spacer tube 5, where the middle spacer tube 5 is located Between the spray gun outer pipe 4 and the blowing gas pipe 3, the rear end of the spray gun outer pipe 4 and the rear of the intermediate spacer pipe 5, the rear end of the intermediate spacer pipe 5 and the blowing gas pipe 3, all pass the connecting flange 6, bolts 7 The intermediate pipe 5 separates the spray gun outer pipe 4 and the blowing gas pipe 3 into a loop cooling liquid channel 8. The cooling liquid in the loop cooling liquid channel 8 is closed by a closed ring 9, and the spray gun outer pipe 4 and the intermediate pipe 5 There is also a coolant inlet connector 10 and a coolant outlet connector 11 at the rear. When working, the coolant flows in fro...

Embodiment 2

[0027] The difference between this embodiment and the first embodiment is that the raw materials fed into the furnace are not doped with refining slag, and the grade of copper into the furnace is 70%. The blowing method of the oxygen-enriched blowing device includes the following steps:

[0028] 1) After the slag dumping operation of the converting furnace, turn on the circulating coolant switch, and the coolant flow rate is 27Nm 3 / h, the hydraulic pressure is 110~160kPa, extend the blowing spray gun into the furnace cavity, the front surface of the blowing spray gun is 10-30cm away from the copper liquid level, the specific position depends on the splashing of the copper liquid in the blowing furnace, such as If the copper liquid splashes seriously, increase the distance between the front surface of the blowing spray gun and the copper liquid level, and then pass a mixture of oxygen and air into the blowing gas pipe inlet for oxygen-enriched blowing, and the air flow rate is 400...

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Abstract

The invention relates to an oxygen-enriched blowing device which comprises a blowing lance and a lance supporting device, wherein the blowing lance comprises a blowing gas pipe, a lance outer pipe and an intermediate partition pipe located between the lance outer pipe and the blowing gas pipe; the lance-supporting device is a semi-circular concave groove and is located below the blowing lance, at least three pairs of rollers are arranged in the concave groove and the blowing lance is supported on the rollers. The blowing method suitable for the oxygen-enriched blowing device comprises the steps of 1) after deslagging, putting the front end surface of the blowing lance at a position 10-30cm above the copper liquid level, introducing a mixed gas of oxygen and air under the conditions that the air flow rate is 4000-11000Nm<3> / h, the air pressure is 0.3-0.4MPa and the oxygen flow rate is 200-300Nm<3> / h and blowing for 10-20 minutes; 2) carrying out oxygen-enriched blowing for 10-20 minutes under the condition that the oxygen flow rate is 100-150Nm<3> / h; and 3) turning off the oxygen switch and carrying out air blowing until the blowing is completed. By the blowing technology disclosed by the invention, the productivity can be improved, labor intensity is reduced and the service life of the blowing lance can be prolonged.

Description

Technical field [0001] The invention relates to the technical field of smelting, in particular to an oxygen-enriched blowing device and a method thereof. Background technique [0002] At present, the blowing operations of the blister copper production process mainly include the following: [0003] PS converter blowing. This technology completes the entire converting process in a furnace body that continuously rotates. The converting operation needs to go through two cycles of converting slagging and converting desulfurization. Due to the periodic intermittent operation of the PS converter, serious low-altitude pollution and low production automation level, it cannot meet the environmental protection requirements of today's smelting industry. [0004] Osmelt furnace blowing. When using the Osmelt furnace for blowing, the blowing lance is vertically inserted into the slag layer of the furnace cavity molten pool from the top of the furnace. The slag is first oxidized under the strong...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B5/12
Inventor 张庚
Owner 铜陵四通环境科技有限公司
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