Preparation method of ladle filler sand

Abstract

The invention discloses preparation, packaging and layered adding methods of ladle filler sand. The ladle filler sand is prepared from the following components in percent by weight: 30-50% of chromiumladle filler sand and 50-70% of compound ladle filler sand. The compound ladle filler sand is magnesium ladle filler sand or silicon ladle filler sand. The chromium ladle filler sand is prepared fromthe following components in percent by weight: 65-80% of first chromium ore, 12-16% of first quartz sand, 4-6% of first magnesite, 6-8% of first aluminum oxide spheres, 3-5% of first potassium feldspar and 1-3% of a first carbon proportioning agent. Cr2O3 content of the first chromium ore is greater than or equal to 46-51wt%, and the granularity is 0.15-2 mm; SiO2 content of the first quartz sandis greater than or equal to 98.0wt%; MgO content in the first magnesite is greater than or equal to 98.0wt%; Al2O3 content of the first aluminum oxide spheres is greater than or equal to 75.0wt%; K2Ocontent of the first potassium feldspar is greater than 8wt%; C contents of first graphite and first carbon black are greater than 92wt%. The ladle filler sand is added quantitatively in layers, so that the self-opening rate of a steel ladle is improved and the production cost of the ladle filler sand is lowered. The ladle filler sand made from different materials is added uniformly in layers andat a fixed speed under constraint of a packaging barrel.

Description

technical field

[0001] The invention belongs to the field of drainage sand, and in particular relates to a preparation, packaging and layered addition method of drainage sand filled in a ladle nozzle. Background technique

[0002] Drainage sand is used in the ladle sliding nozzle. The mechanism of action is that the drainage sand filled in the ladle nozzle has a thinner sintered layer formed on the upper surface under the heat of molten steel to form a "shell". Most unsintered sand bodies fall freely, and at the same time, the "shell" is crushed by the static pressure of the molten steel, and the molten steel flows out automatically. The drainage sand is divided into the upper sintered layer and the lower quicksand layer.

[0003] The upper sintering layer requires the drainage sand to have high refractoriness and not pollute the molten steel. At the same time, it is required to have a certain sintering performance. The surface layer can be lightly sintered and has a certai...

Examples

Embodiment 1

[0068] Embodiment 1: first put the lower port of the long pipe funnel 9 into the sliding nozzle of the ladle;

[0069] Then the bottle cap 7 of the conical plastic packaging barrel 10 is opened, put it upside down into the upper port of the conical long tube funnel 9, under the action of gravity, the drainage sand is directly added in the ladle sliding nozzle through the long tube funnel 9, and The process is uniform, stable, accurate and reliable. After the addition is complete, lift the funnel upwards slowly and evenly to make the drainage agent form a high left and right ball crown. The specific joining process is attached image 3 shown.

[0070] Preferably, this patent uses a long tube funnel 9 to add, the pipe diameter is 100mm, and the inclination angle of the funnel is 60°C. When adding, the bottle cap 7 is opened, and the plastic bucket is placed on the top of the funnel, under the influence of gravity and the better fluidity of the drainage sand Next, the air ente...

Embodiment 2

[0073] Embodiment 2: the volume of the packaging drum 10 of conical plastic can be determined according to the volume of drainage sand used in each furnace of ladles of different sizes in each steel plant, and the loading capacity is about 5-20% more than the theoretical usage, so as to ensure that the addition is inaccurate Meet the use requirements under abnormal conditions. Drainage sand is added in a certain proportion and order. The chrome drainage sand is located at the bottom of the packaging barrel 10, the composite drainage sand is the upper part of the packaging barrel 10, and the mixed drainage sand layer 2 is in the middle. When packaging, ensure that the drainage sand fills the conical plastic packaging barrel 10, and then perform vacuum sealing. Ensure that the upper and lower drainage sands do not undergo violent mixing and movement during transportation and use; figure 2 shown.

[0074] The bottom of the packaging barrel is provided with a bottle cap 7, and...

Embodiment 3

[0077] Embodiment 3: The diameter of the bottle mouth of the packaging drum 10 adopting conical plastic is about 70mm, the inclination angle of the cone is 60°C, the diameter of the cylinder is 250mm, the height of the conical section is about 180mm, the height of the whole body is about 300mm, the overall height is 480mm, and the volume It is 18L, suitable for adding drainage sand to a 120-ton ladle in a steel factory.

technical field

[0001] The invention belongs to the field of drainage sand, and in particular relates to a preparation, packaging and layered addition method of drainage sand filled in a ladle nozzle. Background technique

[0002] Drainage sand is used in the ladle sliding nozzle. The mechanism of action is that the drainage sand filled in the ladle nozzle has a thinner sintered layer formed on the upper surface under the heat of molten steel to form a "shell". Most unsintered sand bodies fall freely, and at the same time, the "shell" is crushed by the static pressure of the molten steel, and the molten steel flows out automatically. The drainage sand is divided into the upper sintered layer and the lower quicksand layer.

[0003] The upper sintering layer requires the drainage sand to have high refractoriness and not pollute the molten steel. At the same time, it is required to have a certain sintering performance. The surface layer can be lightly sintered and has a certai...

Examples

Embodiment 1

[0068] Embodiment 1: first put the lower port of the long pipe funnel 9 into the sliding nozzle of the ladle;

[0069] Then the bottle cap 7 of the conical plastic packaging barrel 10 is opened, put it upside down into the upper port of the conical long tube funnel 9, under the action of gravity, the drainage sand is directly added in the ladle sliding nozzle through the long tube funnel 9, and The process is uniform, stable, accurate and reliable. After the addition is complete, lift the funnel upwards slowly and evenly to make the drainage agent form a high left and right ball crown. The specific joining process is attached image 3 shown.

[0070] Preferably, this patent uses a long tube funnel 9 to add, the pipe diameter is 100mm, and the inclination angle of the funnel is 60°C. When adding, the bottle cap 7 is opened, and the plastic bucket is placed on the top of the funnel, under the influence of gravity and the better fluidity of the drainage sand Next, the air ente...

Embodiment 2

[0073] Embodiment 2: the volume of the packaging drum 10 of conical plastic can be determined according to the volume of drainage sand used in each furnace of ladles of different sizes in each steel plant, and the loading capacity is about 5-20% more than the theoretical usage, so as to ensure that the addition is inaccurate Meet the use requirements under abnormal conditions. Drainage sand is added in a certain proportion and order. The chrome drainage sand is located at the bottom of the packaging barrel 10, the composite drainage sand is the upper part of the packaging barrel 10, and the mixed drainage sand layer 2 is in the middle. When packaging, ensure that the drainage sand fills the conical plastic packaging barrel 10, and then perform vacuum sealing. Ensure that the upper and lower drainage sands do not undergo violent mixing and movement during transportation and use; figure 2 shown.

[0074] The bottom of the packaging barrel is provided with a bottle cap 7, and...

Embodiment 3

[0077] Embodiment 3: The diameter of the bottle mouth of the packaging drum 10 adopting conical plastic is about 70mm, the inclination angle of the cone is 60°C, the diameter of the cylinder is 250mm, the height of the conical section is about 180mm, the height of the whole body is about 300mm, the overall height is 480mm, and the volume It is 18L, suitable for adding drainage sand to a 120-ton ladle in a steel factory.

Images