Production method for seamless pure-calcium core-spun yarn

A pure calcium cored wire and production method technology, applied in the field of cored wire, can solve the problems of high rejection rate, small advantages and high production technical requirements, reduce the rejection rate and production cost, prevent calcium gasification loss, production Technically demanding effects

Active Publication Date: 2017-10-13
MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the domestic production technology of seamless pure calcium wire is still in the exploratory stage. The one-time investment in equipment is large, the production technology requirements are high, and the process is complicated. The cored wire cladding unit does not match the speed of high-frequency and laser welding. Frequency, temperature and other parameter control requirements are extremely high, resulting in a low qualified rate of finished product quality, a high scrap rate of 35-40%, low output, and high production costs
In addition, the thickness of the steel strip is about 0.9-1.0mm, and the surface hardness of the cored wire produced is large. The feeding process line of the wire feeding machine in the steel factory is easy to slip and cannot be fed, which affects production. Compared with the cost of solid core pure calcium wire, The advantage is small, it is difficult to promote the use in steel mills

Method used

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  • Production method for seamless pure-calcium core-spun yarn
  • Production method for seamless pure-calcium core-spun yarn
  • Production method for seamless pure-calcium core-spun yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 2 As shown, a production system of a seamless pure calcium cored wire in this embodiment includes a heating device 2, an extruder 3, a vacuum coating treatment tank 12 and a curing processor 14, wherein the heating device 2, the extrusion Machine 3, vacuum coating treatment tank 12 and curing processor 14 are arranged in sequence. Such as image 3 As shown, the above-mentioned vacuum coating treatment tank 12 is connected with the liquid storage device 19 through the liquid inlet pipeline 18, a liquid level gauge is arranged in the said vacuum coating treatment tank 12, and a liquid inlet pump and a control valve are arranged on the liquid inlet pipeline 18 , and the liquid level gauge, liquid inlet pump and control valve are all connected to the control system. The outlet end of the curing processor 14 is also provided with a sizing machine 15 and a rewinder in sequence, and the side of the curing processor 14 is also provided with a hot air device 13...

Embodiment 2

[0062] Such as figure 2 As shown, the production system of a seamless pure calcium cored wire in this embodiment is basically the same in structure as in Embodiment 2, the difference being that the ceramic powder in the nano-ceramic coating filled in the vacuum coating treatment tank 12 is The particle size is 1000 mesh, SiO 2 、 Al 2 o 3 and TiO accounted for 53%, 30%, and 17% of the total weight of the ceramic powder, nano-silica sol, nano-Al 2 o 3 The addition amount of the modified silicone resin and the modified silicone resin are respectively 25%, 10% and 13% of the total weight of the ceramic powder. The additions of absolute ethanol, acetone and polyacrylamide account for 28%, 15% and 0.5% of the total weight (dry weight) of the coating respectively, and the pH value of the coating is 8 and the viscosity is 0.45 Pas.

[0063] The production system of the seamless pure calcium cored wire of this embodiment is used to produce the cored wire, and the specific steps a...

Embodiment 3

[0071] Such as figure 2 As shown, the production system of a seamless pure calcium cored wire in this embodiment is basically the same in structure as in Embodiment 2, the difference being that the ceramic powder in the nano-ceramic coating filled in the vacuum coating treatment tank 12 is The particle size is 800 mesh, SiO 2 、 Al 2 o 3 and TiO accounted for 50%, 30%, and 20% of the total weight of the ceramic powder, respectively, nano-silica sol, nano-Al 2 o 3 The addition amount of the modified silicone resin and the modified silicone resin are respectively 24%, 8% and 11% of the total weight of the ceramic powder. The additions of absolute ethanol, acetone and polyacrylamide account for 27%, 13% and 0.4% of the total weight (dry weight) of the paint respectively, the pH value of the paint is 8, and the viscosity is 0.30Pas.

[0072] The production system of the seamless pure calcium cored wire of this embodiment is used to produce the cored wire, and the specific ste...

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Abstract

The invention discloses a production method for a seamless pure calcium core-spun yarn, and belongs to the technical field of alloy core-spun yarn. The production method comprises the steps that after being heated, a metal calcium bar is extruded and formed into a metal calcium wire with the diameter of 8.7-12.9mm through an extruding machine; the extruded metal calcium wire is guided into a vacuum coating processing tank so that the surface of the calcium wire can be uniformly coated with a nano ceramic coating; the calcium wire coated with the nano ceramic coating is guided into a curing processor and is subjected to curing treatment through a hot air device; and after the coating on the surface of the metal calcium wire is cured, the metal calcium wire is guided into a sizing mill to be subjected to sizing treatment through a guide wheel, then the residual coating on the surface of the calcium wire is cut off, and the calcium wire is rewound into the seamless pure-calcium core spun yarn with the diameter of 9-13mm. According to the technical scheme of the production method, the treatment effect of the obtained core-spun yarn on molten steel can be effectively guaranteed, the rejection rate of an obtained core-spun yarn product is low, a production system is simple in structure, the production efficiency is high, the cost is low, and popularization and use can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of cored wire, and more specifically relates to a production method of a seamless pure calcium cored wire. Background technique [0002] With the advancement of steelmaking technology, especially the development of molten steel refining technology, it has become possible to produce high-purity, high-quality, high-grade steel. Low-carbon aluminum-killed steel and some steel types that require extremely high purity mainly use LF-VD or RH furnaces to refine molten steel, and use wire feeding to deform inclusions in molten steel, thereby further improving the purity of molten steel To improve the pourability of molten steel. At present, the alloy wires widely used in steel mills are mainly iron-calcium wire, silicon-calcium wire, solid pure calcium wire and aluminum-calcium wire. [0003] The traditional cored wire is mainly made of core powder or wire, and the outer layer is covered with steel strip. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04C21C7/00
CPCC21C7/0006C21C7/0056C21C7/04
Inventor 李国安王建国李寿全
Owner MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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