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Molten iron pretreatment desulphurization lance and KR stirring device manufacturing process

A technology of molten iron pretreatment and desulfurization spray gun, which is applied in the field of molten iron pretreatment desulfurization spray gun and KR stirring device manufacturing process, which can solve the problems affecting steel quality and achieve the effect of less burning loss

Inactive Publication Date: 2012-04-25
营口东邦环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is not difficult to see from the above analysis that the content of sulfur in molten steel directly affects the quality of steel

Method used

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  • Molten iron pretreatment desulphurization lance and KR stirring device manufacturing process
  • Molten iron pretreatment desulphurization lance and KR stirring device manufacturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The manufacturing process of molten iron pretreatment desulfurization spray gun and KR mixing device can be implemented in sequence according to the following steps:

[0025] (1) Fabrication and welding of steel structures;

[0026] (2) Put the mixed refractory material into the mold for pouring;

[0027] (3) Demolding and health preservation;

[0028] (4) Baking in the kiln.

[0029] In the present invention, in terms of weight percentage, the refractory components used in the step (2) include:

[0030] Corundum 7%;

[0031] Scorched Gems 7%;

[0032] Steel fiber 8%;

[0033] Fused mullite 69%;

[0034] Water 9%.

[0035] In the step (2) of the present invention, a frequency conversion vibration motor is used to vibrate and stir the refractory material in the mold.

[0036] In the step (3) of the present invention, the time for demoulding and maintaining health is 7 days.

[0037] see figure 1 As shown, in the step (...

Embodiment 2

[0039] Embodiment 2: In the present invention, in terms of weight percentage, the refractory material components used in the step (2) include:

[0040] Corundum 6%;

[0041] Burnt gems 8%;

[0042] Steel fiber 11%;

[0043] Fused mullite 67%;

[0044] Water 8%.

[0045] Other steps are the same as in Example 1.

[0046] Concrete manufacturing steps of the present invention are as follows.

[0047] (1) Manufacture and welding of steel structure: (A) Steel structure part of the spray gun: the existing design is close to the gun barrel and welded on the outside of the first layer of Φ16mm straight rebar to support the two-layer Φ14mm steel metal ring, frame Two layers of Φ16mm straight rebar, plus some Φ14mm straight anchors with a length of 100mm are used as the skeleton of the refractory material. The spray gun produced by this method has been used in several domestic steel mills, and all of them have different degrees of burst and deep longitudinal crac...

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Abstract

The invention belongs to the field of molten iron pretreatment desulphurization device manufacturing process, and especially relates to a molten iron pretreatment desulphurization lance and KR stirring device manufacturing process; the invention is characterized in that the process is performed orderly by the following steps of: (1) preparation and welding of a steel structure; (2) casting of a mixed refractory material in a mold; (3) demolding and curing; (4) baking in a kiln. According to the invention, on a weight basis, the refractory material adopted in step (2) comprises the following components: 4-8% of corundum; 5-9% of flint clay; 2-15% of steel fibers; 51-76% of fused mullite; and 8-9% of water. In the step (2), the refractory material in the mold is vibrated and stirred by a frequency conversion vibration motor. With the invention, the automaticity is high, and the produced product has a long service life.

Description

technical field [0001] The invention belongs to the field of manufacturing technology of molten iron pretreatment desulfurization devices, and in particular relates to a manufacturing technology of a molten iron pretreatment desulfurization spray gun and a KR stirring device. Background technique [0002] With the continuous expansion of my country's steel industry in recent years, the output of molten steel is also increasing year by year, and more and more steel mills are developing towards high-quality and special steel. And these steel grades have very low requirements on the content of sulfur in molten steel, because the high content of sulfur in molten steel will produce internal cracks during continuous casting. Many steel grades require the sulfur content not to exceed 0.015%, high-quality steel requires the sulfur content to be below 0.005%, and even some special steels must require the sulfur content to be below 0.002%. This requires steel mills to pay attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02
Inventor 于林辉陈学新项瑞清陈树村
Owner 营口东邦环保科技股份有限公司