Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for removing tin in pure steel smelting process

A smelting process and pure steel technology, applied in the field of iron and steel smelting, can solve the problems of high technical difficulty, high production cost and high energy consumption, and achieve the effects of high-efficiency detinning reaction, low production cost and short process time.

Active Publication Date: 2022-04-29
WUHAN UNIV OF SCI & TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to crush and sieve the steel raw material in advance to make steel powder with a particle size of less than 100 μm, which is difficult in technology, high in energy consumption, and high in production cost. Iron loss is caused, and due to the carbonization of steel due to the addition of coal powder, further blowing decarburization in the converter is required in the later stage. The above-mentioned many disadvantages make this method unable to meet the needs of practical applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for removing tin in pure steel smelting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The impurity components and weight percentages of the tin-containing molten steel used in Example 1 are as follows: C: 0.1~0.2wt%, Si: 0.10~0.30wt%, Mn: 0.55~0.75wt%, P: 0.005~0.015wt%, S: 0.002 to 0.008 wt%, Sn: 0.01 to 0.015 wt%, O: 0.01 to 0.03 wt%.

[0046] According to the above-mentioned tin-containing liquid steel, the present embodiment 1 provides a method for removing tin in the pure steel smelting process, comprising the following steps:

[0047] S1, under the conditions of protective atmosphere of argon gas and smelting temperature of 1550°C, the tin-containing molten steel is pretreated, and calcium-containing slag is added to the tin-containing molten steel to make slag, and the slag is melted to obtain The tin-containing molten steel after pretreatment; and the chemical composition and weight percentage of the calcium-containing slag system are: CaO: 30wt%, Al 2 o 3 : 30wt%, SiO 2 : 40wt%; the added amount of the calcium-containing slag system is 10wt% ...

Embodiment 2-4

[0052] The difference from Example 1 lies in that the addition ratio of the process parameters is set differently, and other steps are the same as in Example 1, and will not be repeated here.

[0053] Table 1 is the process parameter setting and performance parameter thereof of embodiment 1-4

[0054] Example Adding amount of tin remover Addition amount of calcium slag Addition amount of aluminum ingot Tin removal rate Example 1 15wt% 15wt% 0.05wt% 57.5％ Example 2 5wt% 15wt% 0.05wt% 28.4％ Example 3 15wt% 20wt% 0.05wt% 50.6％ Example 4 15wt% 15wt% 0.1wt% 54.3％

[0055] Embodiments 1 to 4 are analyzed in conjunction with Table 1: in the present invention, the larger the addition ratio of tin removal agent, the better the tin removal effect (tin removal rate), but for the economic rationality of production practice, the addition of tin removal agent The more, the higher the production cost. Therefore, consideri...

Embodiment 5

[0057] The impurity components and weight percentages of the tin-containing molten steel used in Example 1 are as follows: C: 0.1~0.2wt%, Si: 0.10~0.30wt%, Mn: 0.55~0.75wt%, P: 0.005~0.015wt%, S: 0.002 to 0.008 wt%, Sn: 0.01 to 0.015 wt%, O: 0.01 to 0.03 wt%.

[0058] According to the above-mentioned tin-containing liquid steel, the present embodiment 1 provides a method for removing tin in the pure steel smelting process, comprising the following steps:

[0059] S1, under the conditions of protective atmosphere of argon gas and smelting temperature of 1550°C, the tin-containing molten steel is pretreated, and calcium-containing slag is added to the tin-containing molten steel to make slag, and the slag is melted to obtain The tin-containing molten steel after pretreatment; and the chemical composition and weight percentage of the calcium-containing slag system are: CaO: 50wt%, Al 2 o 3 : 40wt%, SiO 2 : 10wt%; the added amount of the calcium-containing slag system is 15wt% ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for removing tin in the pure steel smelting process. In the method, firstly, the tin-containing molten steel is pretreated under the conditions of an inert gas protective atmosphere and a smelting temperature of 1550-1600° C. to obtain the pretreated tin-containing molten steel; then, the pretreated tin-containing molten steel is added Add aluminum ingots to the pretreated tin-containing molten steel, carry out deep deoxidation treatment, so that the oxygen content in the tin-containing molten steel is reduced to 5-30ppm, and prepare the deoxidized tin-containing molten steel; finally, feed In the way of line, add detinning agent to the deoxidized tin-containing molten steel, and at the same time, stir the tin-containing molten steel for 5 to 30 minutes, carry out the detinning reaction of molten steel, and obtain the detinned molten steel; then perform post-treatment, Clean steel with tin removal is produced. The method for removing tin in the pure steel smelting process provided by the present invention not only has the characteristics of high detinning efficiency and can be operated based on the existing steelmaking process, but also has low production cost, simple and controllable process, and is suitable for large-scale industrial applications The advantages.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for removing tin in the pure steel smelting process. Background technique [0002] The problem caused by residual elements in steel is one of the important problems facing the current metallurgical industry. In the process of iron and steel smelting, usually raw materials such as iron ore, ferroalloy and scrap steel may introduce a large amount of impurity elements. During the smelting process, some impurity elements can be removed, but there are still some residual elements because their affinity with oxygen is lower than that of iron, that is, the oxidation potential is lower than that of iron. It is difficult or impossible to remove them all by conventional processes in the steel smelting process. The accumulation of cycles leads to an increase in the content of residual elements in the steel. [0003] As one of the main residual elements in steel, t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C21C7/04C21C7/076
CPCC21C7/06C21C7/04C21C7/0056C21C7/076Y02P10/20
Inventor 张翔李治桥马国军郑顶立刘孟珂李志姚旺龙徐菊许杰
Owner WUHAN UNIV OF SCI & TECH