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Method for preparing steel liquid purifying agent

A purification agent and molten steel technology, applied in the direction of reducing gas emissions, can solve problems such as the difficulty of separating blocks, increasing alloy prices, and affecting alloy production, and achieves the advantages of easy application and promotion, reduced production costs, and short furnace time Effect

Pending Publication Date: 2020-04-28
谢应凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One ton of alloy liquid needs to be cast in a small mold of 80-90 pieces, and the casting time is 40-50 minutes, which affects the alloy output
[0005] 2. Blocking is difficult
Due to the toughness of the alloy, it is difficult to separate the lumps from each other
Moreover, the separated alloy block has many flashes and burrs, which is not easy to pack and use, and the shape of the alloy block is not standard
It is labor-intensive and time-consuming, and a daily worker can only arrange less than one ton of goods
[0006] Due to the above reasons, the production cost of aluminum-calcium alloy is high, the output is low, the price of the alloy is increased, and the promotion and use in large-scale production are limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Aluminum calcium alloy blocks. Ingredients ratio of raw materials: 80 kg of metal aluminum, 20 kg of calcium. Put it into the reverberatory melting furnace according to its proportion and melt it into alloy liquid. Cast the alloy liquid into a bar mold, and cast an alloy bar with a length of 3m, a width of 20mm, and a thickness (height) of 20mm. After cooling, cut into cubes with a length, width and height of 20mm. The fire consumption of the alloy is 1.2%, and the furnace time is 10 minutes. Alloy composition: Al 79.4%, Ca 18.1%, and the balance is impurities. A manual cutting of more than 5 tons.

Embodiment 2

[0018] Aluminum calcium magnesium alloy block. Ratio of ingredients: 80 kg of aluminum, 15 kg of calcium, and 5 kg of magnesium. Put it into low-frequency electric furnace according to its proportion and melt it into alloy liquid. The alloy liquid is cast into a mold for casting an alloy ingot to form an alloy ingot. Then the alloy ingot is extruded into a 2m, 30mm wide, and 20mm high alloy bar, and the alloy bar is cut into a 40mm cuboid alloy block. It takes 5 minutes for the alloy liquid to come out of the furnace and cast the mold. The alloy composition is: Al79.4%, Ca13.3%, Mg4.6%, and the balance is impurities.

Embodiment 3

[0020] Aluminum calcium magnesium alloy block. Ingredients ratio: aluminum 80%, reduced calcium 15%, magnesium 5%. Calcium and magnesium are added to the vacuum bag for the production of electrolytic aluminum, and the particle size is less than 10mm 3 , Use the temperature of purified aluminum liquid to melt calcium to make aluminum-calcium alloy liquid. Then put the liquid into the electrolytic cell, and use the wire puller to produce alloy bars with a diameter of 20mm and a length of 6m, and then cut into 20mm alloy blocks. Alloy into Ai84%, Ca14,7%, Mg4,0%. More than 6 tons of mechanical cutting and manual cutting.

[0021] During steelmaking and refining in a steel factory, the aluminum-calcium-magnesium alloy block of Example 2 was used, and 1.2 kilograms per ton of steel was added, and the purification of molten steel was completed simultaneously with deoxidation and modification. According to the current price, the cost per ton of steel is 22.80 yuan, the tapping ti...

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Abstract

The invention provides a method for preparing a steel liquid purifying agent. The problems to be solved include that hot melt casting production of an aluminum calcium magnesium alloy steel liquid purifying agent has the disadvantages of high production cost, low output, irregular shape and the other, and promotion and use in large production are limited. The gist of the method for preparing the steel liquid purifying agent includes that first aluminum-calcium-magnesium alloy liquid is smelted through a remelting method or a flushing melting method, then the aluminum-calcium-magnesium alloy liquid is prepared into alloy bars, and finally the alloy bars are cut into alloy blocks. The method for preparing the steel liquid purifying agent has the positive effects that time for furnace discharging is short, cutting and shaping are easy, the production cost of an alloy is significantly reduced, and application and promotion in the large-scale production of steel making is facilitated.

Description

technical field [0001] The invention belongs to a molten steel purifying agent for steelmaking. The molten steel purifying agent refers to a molten steel purifying agent with the functions of aluminum deoxidation and calcium modification treatment. Specifically, the molten steel purifying agent is prepared by hot smelting and cold forming. Background technique [0002] Steelmaking deoxidation uses aluminum deoxidation. Aluminum ingots are made into aluminum wires, aluminum blocks, aluminum segments, aluminum iron, etc. When aluminum is deoxidized, AI with a high melting point (2100°C) will be generated in molten steel 2 o 3 , forming solid inclusions. To change the AI 2 o 3 Properties, purification of molten steel, and then use calcium (cored wire) to treat AI in molten steel 2 o 3 Carry out modification treatment (generally called calcium modification), so that the AI ​​in molten steel 2 o 3 Calcium aluminate with a low melting point (1400°C) is generated, which fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D3/00C22C1/02C22C21/00C21C7/06C21C7/00
CPCB22D3/00C21C7/00C21C7/06C22C1/026C22C21/00Y02P10/134
Inventor 谢应凯
Owner 谢应凯
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