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Pillar slot type anti-blocking ladle bottom blowing powder spraying device

A slot-type, prismatic technology, used in casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of short service life of powder-spraying components, narrow gaps of powder-spraying components, and serious impact of powder-spraying components. The pulsation probability is small, the powder airflow is continuous and stable, and the effect of stable injection

Inactive Publication Date: 2011-12-14
NORTHEASTERN UNIV
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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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  • Pillar slot type anti-blocking ladle bottom blowing powder spraying device
  • Pillar slot type anti-blocking ladle bottom blowing powder spraying device
  • Pillar slot type anti-blocking ladle bottom blowing powder spraying device

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Embodiment

[0027] In this embodiment, a prism slit type anti-blocking ladle bottom blowing powder device, such as figure 2 (a) and figure 2 Shown in (b), the main parameters of its embodiment are as follows:

[0028] (1) Breathable bricks are used as refractory materials, and the inner diameter of the brick core is Φ 1 : The design principle is: not only to avoid the inner diameter of the brick core being too small to cause the powder airflow to aggregate in the ladle molten pool to form a large bubble bag, but also to avoid the inner diameter of the brick core being too large to reduce the penetration of the jet; the inner diameter of the breathable brick core is Φ 1 The range of values ​​is: Φ 1 =6~300mm, take Φ in this embodiment 1 = 15mm;

[0029] (2) Permeable brick outer diameter 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 layout of the gap, the value r...

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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 iron and steel refining, and in particular relates to a prism gap type anti-blocking ladle bottom blowing powder device. Background technique [0002] Ladle bottom spraying powder refining is an emerging new technology with creativity and broad application prospects. However, since the working environment of ladle bottom spraying is worse than that of ladle bottom blowing argon mixing, the ladle bottom spraying process faces many technical problems after it is proposed. to be solved. During the powder spraying smelting process, the powder needs to be sent into the molten pool through the powder spraying components. The input range is adjustable and controllable, and the refractory material is required to be wear-resistant and corrosion-resistant and have a long service life. It is the core component of the ladle bottom powder spraying process. The powder spraying element is in the high temperature and s...

Claims

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Application Information

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