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Superlight, carbonless granular ladle covering agent resource saving and environment type

An environmentally friendly, ladle covering agent technology

Inactive Publication Date: 2006-11-29
SHANGHAI PANLONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the poor spreadability of the ladle covering agent in the prior art, the unsatisfactory heat preservation effect, the easy pollution of molten steel and the environment, and the use of primary resources for carbon-containing covering agents such as graphite, coal, coke powder, etc., which are easy to cause ultra-low carbon. Steel and ultra-low carbon stainless steel water carburization and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] Example 1 The chemical composition (by weight) of the ultra-light, carbon-free granular ladle covering agent is calculated as calcium oxide 27.8Kg, silicon dioxide 58.7Kg, magnesium oxide 4.9Kg, aluminum oxide 6.1Kg, iron oxide 0.4 Kg, sodium oxide 0.1Kg, add 2Kg cornstarch---food-grade organic binder, add appropriate amount of water as needed, stir evenly, extrude and granulate (φ5∽8mm cylinder, length 5∽25mm), bake When the moisture content of the finished product is less than or equal to 1%, the finished product is packaged and put into storage after cooling.

Embodiment 2

[0006] Example 2 The chemical composition (by weight) of ultra-light, carbon-free granular ladle covering agent is calculated as calcium oxide 15Kg, silicon dioxide 68Kg, magnesium oxide 3Kg, aluminum oxide 10Kg, iron oxide 1.9Kg, sodium oxide 0.1Kg, add 2Kg cornstarch--food-grade organic binder, add appropriate amount of water as needed, stir evenly, extrude and granulate (φ5∽8mm cylinder, length 5∽25mm), bake until the finished product moisture≤ 1%, after the finished product is cooled, it is packaged and put into storage.

Embodiment 3

[0007] Example 3 The chemical composition (by weight) of the ultra-light, carbon-free granular ladle covering agent is calculated as 44Kg of calcium oxide, 49Kg of silicon dioxide, 1Kg of magnesium oxide, 2Kg of aluminum oxide, 1Kg of iron oxide, and 1Kg of sodium oxide , add 2Kg corn starch---food-grade organic binder, add appropriate amount of water as needed, stir evenly, extrude and granulate (φ5∽8mm cylinder, length 5∽25mm), bake until the finished product has a moisture content of ≤1% After the finished product is cooled, it is packaged and put into storage.

[0008] Ultra-light, carbon-free granular ladle covering agent has good forming performance, good initial strength and later strength, low powder content, no pollution to molten steel and the environment, and the density can be adjusted between 0.4∽0.7 on demand, which can meet Refractory ladles with different capacities and materials require thermal insulation for molten steel, so that the casting speed can be stab...

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PUM

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Abstract

The invention relates to a light and non-carbon particle steel cladding covering agent that is made up of CaO 15-45%, SiO2 40-70%, MgO 1-6%, Al2O3 2-10%, FeO 0.1-2%, Na2O 0.01-1.0%, and corn starch 1-2%. The advantages of the invention are good extruding granulation molding capability, good initial intension and late strength, low powder content, no pollution, and the density could be adjusted between 0.4-0.7. It is benefit for prolong cladding time. It has no social pollution effects and low density, etc.

Description

technical field [0001] The invention relates to a granular steel ladle covering agent, in particular to a resource-saving and environment-friendly ultra-light, carbon-free granular steel ladle covering agent. Background technique [0002] At present, some general ladle covering agents use carbonized rice husk, but its spreadability is poor, it is easy to cause secondary oxidation of molten steel, and the calorific value is relatively low, and the chemical reaction time is relatively short, so the heat preservation effect is not ideal, and it also causes environmental pollution. . Some use carbon-containing covering agents. Although the spreadability is improved after adding expanded materials such as expanded vermiculite, expanded vermiculite and the like are primary resources, which do not conform to the principle of resource conservation, and carbon-containing covering agents, especially graphite carbon coverings Additives can easily cause carbonation of ultra-low carbon ...

Claims

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Application Information

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IPC IPC(8): C21C7/00B22D11/111
Inventor 王兆达徐永斌徐兵
Owner SHANGHAI PANLONG IND
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