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Frustum slit type anti-blocking ladle bottom-blown powder injection device

A slot-type, powder-spraying technology, used in casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of short service life of powder-spraying components, serious impact of powder-spraying components, and narrow gaps of powder-spraying components. Small pulsation probability, stable blowing, continuous and stable powder flow

Inactive Publication Date: 2013-08-21
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) In order to prevent the molten steel from penetrating into the slit to form cold steel, which will cause injection blockage, the slit of the powder spraying element is narrow, and when the powder airflow in the gas storage chamber enters the slit, the resistance is too large. When smelting with high concentration powder spraying, it is easy The slit entrance is blocked, the injection process is unstable, and the powder air flow fluctuates severely;
[0007] (2) The gas-solid two-phase flow injected by the powder air flow conveying pipe has the highest kinetic energy in the axial direction. The rising powder air flow directly collides with the flat bottom of the powder spraying element, causing kinetic energy loss, and a large amount of powder falls back. At the same time, the powder air flow impacts the powder spraying element Serious, causing vibration and damage to the powder spraying components, poor injection stability, and short service life of the powder spraying components

Method used

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  • Frustum slit type anti-blocking ladle bottom-blown powder injection device
  • Frustum slit type anti-blocking ladle bottom-blown powder injection device
  • Frustum slit type anti-blocking ladle bottom-blown powder injection device

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Embodiment

[0027] In this embodiment, a ridged slot type anti-blocking ladle bottom blowing powder injection device, such as figure 2 (a) and figure 2 As shown in (b), the main parameters of the embodiment are as follows:

[0028] (1) Breathable bricks are used as refractories, and the inner diameter of the brick core is Φ 1 :The design principle is: not only to avoid too small inner diameter of the brick core, which will cause the powder airflow to polymerize in the ladle melting pool to form a large bubble cloth bag, but also to avoid too large inner diameter of the brick core to reduce jet penetration; the inner diameter of the ventilating brick core Φ 1 The value range of is: Φ 1 =6~300mm, take Φ in this embodiment 1 =15mm;

[0029] (2) Outer diameter of breathable brick Φ 2 : The design principle is: under the premise of ensuring the strength of the breathable brick, according to the inner diameter of the breathable brick core and the arrangement of the gaps, the value range is: Φ 2 =30~...

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Abstract

The invention relates to a frustum slit type anti-blocking ladle bottom-blown powder injection device, and belongs to the technical field of steel refining. A frustum slit type powder injection component is filled with refractory material, and four frustum-shaped slits are symmetrically distributed in the refractory material. The frustum slit type anti-blocking ladle bottom-blown powder injectiondevice realizes high-efficiency, continuous and stable injection, has high injection rate and low pulsing probability, can obviously improve uniform powder air flow delivery rate in slits, and is stable in injection, low in abrasion of air bricks, safe and reliable.

Description

Technical field [0001] The invention belongs to the technical field of steel refining, and particularly relates to a ridged slot type anti-blocking ladle bottom blowing powder injection device. Background technique [0002] Ladle bottom blowing powder injection refining is a new technology with creativity and broad application prospects. However, because the working environment of ladle bottom powder injection is worse than that of argon blowing and stirring at the bottom of ladle, it faces many technical problems after the introduction of the powder injection process at the bottom of ladle to be solved. During the powder spraying smelting process, the powder must be fed into the molten pool through the powder spraying element. The design of the powder spraying element should not only solve the problem of continuous and stable injection of the powder without clogging, but also ensure safety and reliability to avoid steel breakout accidents. The input volume range is adjustable a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/00B22D41/02
Inventor 朱苗勇程中福
Owner NORTHEASTERN UNIV LIAONING
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