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Environment-friendly complex calcium cored wire and preparation method thereof

A calcium cored wire, environmentally friendly technology, applied in the field of environmentally friendly composite calcium cored wire and its preparation, can solve the problems of pure calcium wire use restrictions, low calcium yield, molten steel splashing, etc., to reduce calcium loss and safety Accidents, yield improvement, and production cost reduction effects

Inactive Publication Date: 2020-08-11
MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When feeding the wire, the reaction is completed if the critical depth of calcium in liquid form in the molten steel cannot be reached, and part of the metal calcium runs away in the form of calcium vapor before the reaction, resulting in a low calcium yield; pure calcium wire due to reaction Intense, it is easy to cause molten steel to splash, so that the use of pure calcium wire is partially limited

Method used

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  • Environment-friendly complex calcium cored wire and preparation method thereof
  • Environment-friendly complex calcium cored wire and preparation method thereof
  • Environment-friendly complex calcium cored wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see Figure 1-3 , an environmentally friendly composite calcium cored wire, comprising a steel strip sheath 1 and calcium-iron compound particles 2, the calcium-iron compound particles 2 are filled into the steel strip sheath 1, and due to the protection of the steel strip sheath 1, the steel strip sheath 1 enters and puts In molten steel, calcium reacts violently with molten steel during the wire feeding process. Both ends of the steel strip sheath 1 are exposed, and only the two ends of the calcium in molten steel have a relatively low yield. The diameter and volume are larger, and the particle reaction is more peaceful than the powder reaction.

[0028] see Figure 4 The calcium-iron compound particles 2 include iron powder 21 and calcium powder 22, and the iron powder 21 and calcium powder 22 are mixed into a spherical particle structure with a diameter of 6-8 mm.

[0029] The thickness of the steel strip sheath 1 is 0.9-1.2 mm, and the edge of the steel strip she...

Embodiment 2

[0041] An environmentally friendly composite calcium cored wire, the calcium iron compound particles 2 include iron powder 21 and calcium powder 22, the iron powder 21 and calcium powder 22 are mixed, the thickness of the steel strip sheath 1 is 1.1 mm, and the edge of the steel strip sheath 1 is rolled up to form Hollow cylinder shape, the weight percentage of iron powder 21 in the calcium-iron compound particle 2 is 30%, and the weight percentage of calcium powder 22 is 70%.

[0042] The steel belt sheath 1 with a thickness of 1.0mm can pass through the slag layer and molten steel, and penetrate deep into the bottom of the molten steel to avoid premature calcium burning and gasification loss. During the process, the degree of boiling and splashing of molten steel caused by the violent reaction between calcium and molten steel is reduced, the loss of calcium and the occurrence of safety accidents are reduced, and the yield of calcium in molten steel is relatively high.

Embodiment 3

[0044] An environmentally friendly composite calcium cored wire, the calcium-iron compound particles 2 include iron powder 21 and calcium powder 22, the iron powder 21 and calcium powder 22 are mixed, the thickness of the steel strip sheath 1 is 1.2mm, and the edge of the steel strip sheath 1 is rolled up to form Hollow cylinder shape, the weight percentage of iron powder 21 in the calcium-iron compound particle 2 is 30%, and the weight percentage of calcium powder 22 is 70%.

[0045] The steel strip sheath 1 with a thickness of 1.2 mm can pass through the slag layer and molten steel well, and penetrate deep into the bottom of the molten steel to prevent premature burning and gasification loss of calcium. During the wire feeding process, the degree of boiling and splashing of molten steel caused by the violent reaction between calcium and molten steel is reduced, and the loss of calcium and the occurrence of safety accidents are reduced, and the recovery rate of calcium in molt...

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Abstract

The invention discloses an environment-friendly complex calcium cored wire and a preparation method thereof and belongs to the field of cored wires. The environment-friendly complex calcium cored wirecomprises a steel tape sheath and calcium-iron complex particles. The calcium-iron complex particles are filled to the inside of the steel tape sheath. The calcium-iron complex particles comprise iron powder and calcium powder. The iron powder and the calcium powder are mixed into a spherical particle structure with the diameter of 6-8 mm. When the ratio of calcium to iron is 6:4, and the thickness of the steel tape sheath is 1.2 mm, the calcium content of molten steel is highest, the yield is 82.3%, and the degree of molten steel boiling and splashing caused by the strong reaction between calcium and molten steel is substantially reduced in the wire feeding process. The situation that gas generated from reaction of calcium in the molten steel causes environmental destruction is avoided.Calcium loss and occurrence of accidents are reduced. The yield of calcium in the molten steel is increased. The yield of calcium in the cored wire in the molten steel is increased. The production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of cored wire, in particular to an environment-friendly composite calcium cored wire and a preparation method thereof. Background technique [0002] During the steel smelting production process, a large amount of oxygen will appear in the molten steel, because the oxygen in the molten steel will cause a large number of bubbles in the billet, which will affect the surface quality of the billet and the cleanliness of the steel. Therefore, in the smelting process In the process, aluminum or other alloys must be added to remove oxygen from the molten steel, most of the generated oxides float to the slag, and a small part of the oxides remain in the molten steel. These residual oxides have a high melting point. During the continuous casting process It is easy to accumulate on the nozzle wall and grow up, affecting the normal pouring and destroying the crystallizer flow field. A small amount of additives or addit...

Claims

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Application Information

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IPC IPC(8): C21C7/00B22F1/00B22F9/14B22F7/08B22F5/12
CPCC21C7/0056B22F9/14B22F7/08B22F5/12B22F1/052
Inventor 李国安丁传友
Owner MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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