Cap agent with light alkaline particle steel coating

Abstract

A light-weight alkaline particle used as the covering agent of steel ladle contains siO2 (18-26 Wt%), CaO (26-34), MgO (6-12), Al2O3 (5-8), Fe2O3 (0.5-2.0), and stabilized C (18-26). Its advantages are low specific bulk weight, high insulating performance, and high effect to prevent oxidization of molten steel and decrease the corrosion to refractory of ladle.

Description

technical field

[0001] The invention relates to a ladle covering agent, in particular to a light alkaline particle ladle covering agent. Background technique

[0002] At present, the basic ladle covering agent used at home and abroad has a relatively large heap density. Although it has a certain ability to absorb inclusions, the insulation effect is not good. Although the acidic ladle covering agent has a small stack specific gravity and has good thermal insulation performance, it is easy to cause secondary oxidation of molten steel, and the acidic covering agent will corrode the basic ladle refractory. Contents of the invention

[0003] The object of the present invention is to provide an alkaline granular ladle covering agent with low content of reducible oxides and small bulk specific gravity. The present invention designs a light alkaline particle ladle covering agent, which is characterized in that it consists of the following composition and weight percentage: SiO ...

Examples

Embodiment 1

[0006] Embodiment 1: get SiO 2 25kg, CaO31kg, MgO10kg, Al 2 o 3 7.5 kg, Fe 2 o 3 1.5 kg, 25 kg of fixed carbon. Mix and stir to form a 100 kg mixture, add an appropriate amount of water, mix well, make granules of Φ8-10mm×8-25mm by extrusion granulation, bake until the moisture content is less than 1%, and pack after sieving.

Embodiment 2

[0007] Embodiment 2: take SiO 2 22kg, CaO33kg, MgO11kg, Al 2 o 3 7 kg, Fe 2 o 3 1 kg, 26 kg of fixed carbon. Mix and stir to form a 100 kg mixture, add an appropriate amount of water, mix well, make granules of Φ8-10mm×8-25mm by extrusion granulation, bake until the moisture content is less than 1%, and pack after sieving. When used, the covering agent quickly forms a three-layer structure after being added to the ladle. Due to the small specific gravity of the covering agent, it has good thermal insulation performance; and it contains high fixed carbon, and the heat generated by its chemical reaction can further compensate for the heat loss of molten steel and improve the thermal insulation effect; due to the low content of reducible oxides, It can prevent secondary oxidation of molten steel; since the covering agent is alkaline, it will not corrode the basic refractory material of the ladle, which is beneficial to prolong the ladle life of the ladle.

technical field

[0001] The invention relates to a ladle covering agent, in particular to a light alkaline particle ladle covering agent. Background technique

[0002] At present, the basic ladle covering agent used at home and abroad has a relatively large heap density. Although it has a certain ability to absorb inclusions, the insulation effect is not good. Although the acidic ladle covering agent has a small stack specific gravity and has good thermal insulation performance, it is easy to cause secondary oxidation of molten steel, and the acidic covering agent will corrode the basic ladle refractory. Contents of the invention

[0003] The object of the present invention is to provide an alkaline granular ladle covering agent with low content of reducible oxides and small bulk specific gravity. The present invention designs a light alkaline particle ladle covering agent, which is characterized in that it consists of the following composition and weight percentage: SiO ...

Examples

Embodiment 1

[0006] Embodiment 1: get SiO 2 25kg, CaO31kg, MgO10kg, Al 2 o 3 7.5 kg, Fe 2 o 3 1.5 kg, 25 kg of fixed carbon. Mix and stir to form a 100 kg mixture, add an appropriate amount of water, mix well, make granules of Φ8-10mm×8-25mm by extrusion granulation, bake until the moisture content is less than 1%, and pack after sieving.

Embodiment 2

[0007] Embodiment 2: take SiO 2 22kg, CaO33kg, MgO11kg, Al 2 o 3 7 kg, Fe 2 o 3 1 kg, 26 kg of fixed carbon. Mix and stir to form a 100 kg mixture, add an appropriate amount of water, mix well, make granules of Φ8-10mm×8-25mm by extrusion granulation, bake until the moisture content is less than 1%, and pack after sieving. When used, the covering agent quickly forms a three-layer structure after being added to the ladle. Due to the small specific gravity of the covering agent, it has good thermal insulation performance; and it contains high fixed carbon, and the heat generated by its chemical reaction can further compensate for the heat loss of molten steel and improve the thermal insulation effect; due to the low content of reducible oxides, It can prevent secondary oxidation of molten steel; since the covering agent is alkaline, it will not corrode the basic refractory material of the ladle, which is beneficial to prolong the ladle life of the ladle.