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Method and apparatus for heating thin-band continuous-casting crystallized roller

A technology of continuous casting crystallization and heating method, which is applied in the field of crystallization roller heating for continuous casting of metal sheets, and can solve the problems of large energy consumption, belt breakage, and impact on production costs, etc.

Active Publication Date: 2009-07-29
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control the amount and temperature of superheated molten metal in this method, especially under the conditions of thin strip production, it is still easy to cause broken strips.
[0005] The above patents all need to use superheated metal, but heating a large amount of molten metal to the above temperature requires a lot of energy consumption, and when casting thin strips, there will be broken strips at the beginning of casting, which will seriously affect the production cost

Method used

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  • Method and apparatus for heating thin-band continuous-casting crystallized roller
  • Method and apparatus for heating thin-band continuous-casting crystallized roller
  • Method and apparatus for heating thin-band continuous-casting crystallized roller

Examples

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Effect test

Embodiment 1

[0044] Hydrogen is used as fuel gas, and oxygen is used as combustion-supporting gas. The flow ratio of hydrogen and oxygen is chemical reaction ratio 1:0.95, and the pressure of hydrogen is 30PSI. The flame length of the obtained flame curtain wall is 30mm, and the flame temperature is 1200°C; when the pressure of the hydrogen gas is increased to 50 PSI, the flame length of the obtained flame curtain wall is 50mm, and the flame temperature is 1600°C. The intensity and length of all the flames of the flame curtain wall formed by the heating technology of the present invention are similar, and the temperature field is uniform. The heating effect is good.

Embodiment 2

[0046] Natural gas is used as fuel gas, and oxygen is used as combustion-supporting gas. The flow ratio of natural gas and oxygen is a chemical reaction ratio of 1:1, and the pressure of natural gas is 45 PSI. The flame length of the obtained flame curtain wall is 50mm, and the flame temperature is 700°C; when the pressure of the hydrogen gas is increased to 50 PSI, the flame length of the obtained flame curtain wall is 80mm, and the flame temperature is 1000°C. The intensity and length of all the flames of the flame curtain wall formed by the heating technology of the present invention are similar, but the length of the flame is longer than that of the hydrogen-oxygen flame. The temperature field of the flame curtain wall is uniform and the heating effect is good.

Embodiment 3

[0048] Ethanol is used as fuel, and air is used as combustion-supporting gas. The flow ratio of ethanol to air is a chemical reaction ratio of 1:0.9. Considering that ethanol is a liquid fuel, a hydraulic pump is used as a power source, and the pressure of ethanol is 2.0kg / cm 2 . Control the flow of compressed air based on the flow of ethanol to form a chemical reaction ratio of 1:0.9-1:0.98. The flame length of the obtained flame curtain wall is 80mm, and the temperature of the flame is 700°C; when the pressure of ethanol rises to 3.0kg / cm 2 , the flame length of the obtained flame curtain wall is 150mm, and the temperature of the flame is 1000°C. The intensity and length of all the flames of the flame curtain wall formed by the heating technology of the present invention are similar, but the length of the flame is longer. The temperature field of the flame curtain wall is uniform and the heating effect is good.

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Abstract

The invention relates to the crystallization roll heating technology and the oxygen fuel heating technology for continuous casting of thin metal plates (belts). A heating method for strip continuous casting crystal rolls, which is characterized in that the crystal rolls are heated. The heating technology can simulate the actual heat input process during the smooth working section of strip continuous casting. When the working state of the crystal rolls is close to or reaches the actual casting During the stable working section, start the casting of metal again, so that the metal casting process starts directly from the normal stable working section. The heating technology is an oxygen-fuel flame curtain wall type. The combustion-supporting gas and gas or liquid fuel are sprayed out through their respective nozzles and then mixed in the mixing chamber. After being ignited by the divergent oxygen torch nozzle, multiple oxygen torch flames interweave to form a flame. Curtain wall heating thin strip continuous casting crystal roll. The present invention solves the problem of premature solidification of molten metal at the start of casting of thin strip continuous casting.

Description

technical field [0001] The invention relates to the crystallization roller heating technology and the oxygen fuel heating technology for continuous casting of thin metal plates (belts). Background technique [0002] The continuous casting technology of thin metal strip (plate) has the characteristics of high efficiency, low consumption and low cost. It is a new technology and new process that countries in the world are competing to develop in recent years. Among them, the crystallization roller is one of the key components in the thin strip (plate) continuous casting machinery and equipment. The basic principle is that the molten steel enters the molten pool composed of two counter-rotating crystallization rollers and side sealing plates through the flow distributor, and the liquid metal solidifies on the surface of the crystallization rollers after rapid cooling to form a billet shell with a certain thickness. A thin strip (plate) is formed. The basic structure of the cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16
Inventor 张俊宝方园史弼
Owner BAOSHAN IRON & STEEL CO LTD
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