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Low-cost consumable molten iron desulphurization mixer and preparation method thereof

A hot metal desulfurization and stirrer technology, which is applied in the field of low-cost consumption type hot metal desulfurization stirrer and its preparation, can solve the problems affecting the reduction of the cost of hot metal desulfurization, the high price of the stirrer, and the occupation of production time. Crack initiation, enhanced integrity and damage resistance, and reduced metal expansion

Active Publication Date: 2014-12-17
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the price of the agitator is always high, which affects the further reduction of the desulfurization cost of molten iron
In addition, during the use of the mixer, the frequent online manual repair and maintenance of the refractory lining of the mixer consumes about 30-40% of the price of the mixer, and the online repair also takes up valuable resources. Production time, affecting equipment capacity

Method used

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  • Low-cost consumable molten iron desulphurization mixer and preparation method thereof
  • Low-cost consumable molten iron desulphurization mixer and preparation method thereof
  • Low-cost consumable molten iron desulphurization mixer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] like Figure 1~4 As shown, a low-cost consumption type molten iron desulfurization agitator, the agitator includes a stirring shaft 1, a connecting flange 6 arranged above the stirring shaft 1, and the stirring shaft 1 is built-in gas cooling pipe 4 from the inside to the outside With the external composite stirring shaft core 2, a reinforcing rib plate 7 is arranged on the center line of the inner surface of the lower end of the connecting flange 6, and the top of the stirring shaft skeleton 8 is welded and connected with the connecting flange 6 and the reinforcing rib plate 7, and is connected by the reinforcing rib plate 7 Strengthen the connection between the stirring shaft skeleton 8 and the connecting flange 6 .

[0050] The lower end of the stirring shaft 1 is provided with two stirring blades 5, the outermost layers of the stirring shaft 1 and the stirring blades 5 are coated with a refractory working lining 3, and the surface edges of the refractory working lin...

Embodiment 2

[0073] like figure 1 , 2 As shown in and 5: the structure of this embodiment is basically the same as that of embodiment 1, the difference is that the number of stirring blades 5 is 3.

Embodiment 3

[0075] like figure 1 , 2 As shown in and 6: the structure of this embodiment is basically the same as that of embodiment 1, the difference is that the number of stirring blades 5 is four.

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Abstract

The invention discloses a low-cost consumable molten iron desulphurization mixer and a preparation method thereof. The mixer comprises a mixing shaft, and a connecting flange arranged above the mixing shaft, wherein the mixing shaft consists of an internal gas cooling pipe and an external composite mixing shaft core from inside to outside; a plurality of mixing blades are arranged at the lower end of the mixing shaft; and refractory material working liners are applied on the outermost layers of the mixing shaft and the mixing blades. The method comprises the following steps: firstly, a mixing shaft frame and blade frames are prepared; V-shaped anchoring pieces are welded on the metal surfaces of the mixing shaft frame and the blade frames to prepare the composite mixing core; and thermal insulation buffer layers and refractory casting layers cover the metal surfaces of the mixing shaft frame and the blade frames in sequence to obtain the mixer. The comprehensive production cost of the mixer is largely reduced; the recycling value of the mixer after use is largely reduced; the long-distance transporting recovery of the mixer after use and the special recovering utilization of the mixing core are prevented; and the purposes of low cost and consumption of the mixer are achieved.

Description

technical field [0001] The invention relates to a stirrer for mechanically stirring desulfurization outside a molten iron furnace before converter steelmaking and a preparation method thereof, in particular to a low-cost consumption-type molten iron desulfurization stirrer for mechanically stirring desulfurization of molten iron tanks and a preparation method thereof. Background technique [0002] The KR (Kambara Reactor) stirring desulfurization method is a desulfurization technology outside the molten iron furnace that Nippon Steel began to study in 1963 and was applied to industrial production in 1965. This desulfurization method is based on a cross-shaped leaf structure lined with refractory materials The agitator is immersed in the molten iron tank to rotate and stir the molten iron, so that the molten iron generates a vortex, and the weighed desulfurizer is added to the surface of the molten iron by the feeder, and is drawn into the molten iron by the vortex, and mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C7/064
Inventor 欧阳德刚罗安智
Owner 武汉钢铁有限公司
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