Production method of heating type hollow spherical-shape continuous casting protecting slag

A continuous casting mold powder, hollow spherical technology

Inactive Publication Date: 2007-04-25
彭绍权
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Problems solved by technology

[0002] At present, there are mainly two methods for producing continuous casting mold flux for steelmaking: one is the simple mixing method, that is, the various raw materials for producing mold flux are crushed separately and then mixed in a certain proportion and stirred evenly to obtain the finished product. Simple, but there are many problems in use, such as large dust and environmental pollution; the other is the granulation method, that is, the various raw materials for the production of mold powder are crushed and mixed in a certain proportion, and then granulated by extrusion or spraying , dried and sieved to be the finished product
The continuous casting mold slag produced by this method is not easy to control the melting speed of the slag during use, the melting is not balanced enough, the spreading performance is poor, and there are defects on the surface of the slab, which affect the quality of the steel to varying degrees.

Method used

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Embodiment

[0013] The method for producing the exothermic hollow spherical continuous casting mold slag for low-carbon steel in the present invention is: weighing 40% of wollastonite, 10% of graphite, 3% of fluorite, and 35% of blast furnace slag according to the mass ratio and power plant ash 12%, put it into the furnace for pre-melting after mixing, the furnace temperature during pre-melting is ≥1350°C, and sintering in advance; send the pre-melting material into a Raymond machine and grind it into a powder with a particle size of ≤74μm, and then Send these ground powdery materials into a ball mill, and then add 5% of graphite powder, 3% of binder and 50% of water according to the mass ratio of the materials, and grind them to a particle size of ≤45 μm, stir evenly, and make Slurry; the slurry is sprayed into a drying tower with a temperature of 550-750°C in a vacuum drying chamber through a high-pressure pump and an atomizing nozzle to make heat-generating hollow spherical continuous c...

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Abstract

The invention relates to a method for producing heat-radiate hollow ball casting protective slag. Wherein, it uses grammite, graphite, fluor, blast-furnace cement and ash whose particles are smaller than 20mm, to be mixed and put into furnace to be fused and sintered; feeds the fused material into Raymond machine to be grinded into the powder smaller than 74 mum; feeds powder into ball grinder, adds graphite carbon, adhesive and water, to be grinded into particles smaller than 45 mum; mixing into slurry; in the drying tower, uses high-pressure pump and atomizing nozzle to prepare slurry into final product. The invention can control the fusion speed, with stable arc shapes of liquid slag layer and casting blank. And the inventive casting blank has high quality.

Description

technical field [0001] The invention relates to a continuous casting mold flux for steelmaking, in particular to a production method of a heat-generating hollow spherical continuous casting mold flux. Background technique [0002] At present, there are mainly two methods for producing continuous casting mold flux for steelmaking: one is the simple mixing method, that is, the various raw materials for producing mold flux are crushed separately and then mixed in a certain proportion and stirred evenly to obtain the finished product. Simple, but there are many problems in use, such as large dust and environmental pollution; the other is the granulation method, that is, the various raw materials for the production of mold powder are crushed and mixed in a certain proportion, and then granulated by extrusion or spraying , drying, and sieving are finished products. The continuous casting mold slag produced by this method is not easy to control the melting speed of the slag during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111C21C7/076
CPCY02P10/20
Inventor 彭绍权
Owner 彭绍权
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