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RH high-adhesion-rate gunning mix and preparation method thereof

A technology of gunning material and adhesion rate, applied in the field of refractory materials, can solve the problems of low gunning material adhesion rate, large consumption of gunning material, waste, etc., so as to reduce the consumption of gunning material and overcome the short service life. , The effect of reducing the number of spraying

Active Publication Date: 2021-11-05
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the performance of the gunning materials reported above is slightly improved, the adhesion rate of the gunning materials is generally not high, and the consumption of the gunning materials is large (according to the situation of gunning rebound in the field implementation process and single furnace gunning Judgment of material consumption (adhesion rate and consumption), resulting in a lot of rebound and waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of RH high adhesion rate gunning material, its preparation method comprises the steps:

[0037] 1) Weigh each raw material according to the proportion, each raw material and its mass percentage are: waste magnesia-chrome brick recycling material (MgO>95%) 50%, sintered magnesia (MgO>92%) 28%, magnesia dolomite sand 10%, magnesia-calcium sand 5%, micropowder (alumina) 2%, additive 2% (andalusite), explosion-proof fiber 0.05%, reinforcing fiber 0.5%, composite binder 1.95% (Ca(OH) 2, the mass ratio of phosphate is 1:1), sol 0.5% (silica sol); among them, the particles of different particle sizes and their mass percentages in the recycled materials of waste magnesia-chrome bricks are: 3-1mm particles 35%, 1- 0.5mm particles 35%, 0.5-0.088mm particles 15%, less than 0.088mm particles 15%, in which MgO content is 86wt%, Cr 2 o 3 The content is 5.5wt%; the different particle sizes and their mass percentages in sintered magnesia are: 25% of 3-1mm particles, 30% of 1-0...

Embodiment 2

[0041] A kind of RH high adhesion rate gunning material, its preparation method comprises the steps:

[0042] 1) Weigh each raw material according to the proportion, each raw material and its mass percentage are: waste magnesia-chrome brick reclaimed material (MgO>95%) 55%, sintered magnesia (MgO>92%) 20%, magnesia dolomite sand 13%, magnesia-calcium sand 5%, micropowder (alumina and silica micropowder) 3%, additive 1% (andalusite), explosion-proof fiber 0.03%, reinforcing fiber 0.8%, composite binder 1.17% (Mg(OH ) 2 The mass ratio with phosphate is 1:2), sol 1% (aluminum sol, Al 2 o 3 The content is more than 20wt%); Among them, the particles of different particle sizes and their mass percentages in the recycled materials of waste magnesia-chrome bricks are: 30% of 3-1mm particles, 35% of 1-0.5mm particles, 20% of 0.5-0.088mm particles , less than 0.088mm particles 15%, of which MgO content is 88.5wt%, Cr 2 o 3 The content is 6.5wt%; different particle sizes and their m...

Embodiment 3

[0046] A kind of RH high adhesion rate gunning material, its preparation method comprises the steps:

[0047] 1) Weigh each raw material according to the ratio, each raw material and its mass percentage are: waste magnesia-chrome brick reclaimed material (MgO>95%) 43%, sintered magnesia (MgO>92%) 30%, magnesia dolomite sand 13%, magnesia-calcium sand 7%, micropowder (alumina and MgO micropowder) 2%, additive 1% (zircon), explosion-proof fiber 0.05%, reinforcing fiber 0.95%, composite binder 2% (Mg(OH ) 2 , the mass ratio of phosphate is 1:3), sol 1% (aluminum sol); among them, the particles of different particle sizes and their mass percentages in the recycled materials of waste magnesia-chrome bricks are: 35% of 3-1mm particles, 1- 0.5mm particles 30%, 0.5-0.088mm particles 20%, less than 0.088mm particles 15%, in which MgO content is 88wt%, Cr 2 o 3 The content is 7.2wt%; different particle sizes and their mass percentages in sintered magnesia are: 35% of 3-1mm particles,...

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Abstract

The invention discloses an RH high-adhesion-rate gunning mix, which is characterized by comprising the following components in percentage by mass: 30 to 60 percent of waste magnesite-chrome brick reclaimed material, 20 to 45 percent of magnesite clinker, 10 to 30 percent of magnesium dolomite sand, 5 to 20 percent of magnesium-calcium sand, 1 to 6 percent of micro powder, 1 to 5 percent of additive, 0.01 to 0.1 percent of explosion-proof fiber, 0.5 to 2 percent of reinforcing fiber, 0.5 to 4 percent of composite binding agent and 0.5 to 2 percent of sol, wherein the additive is one or more of sillimanite, andalusite, kyanite and zirconite, and the composite binding agent is two or more of Ca(OH)2, Mg(OH)2, phosphate and polyphosphate. The gunning mix disclosed by the invention has the advantages of high adhesion rate, small resilience and the like, and has the characteristics of prolonging the service life of the dip pipe, reducing the gunning frequency and reducing the gunning material consumption after being used; and the related preparation method is relatively simple and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a RH high adhesion rate gunning material and a preparation method thereof. Background technique [0002] The RH vacuum cycle degassing refining technology was jointly developed by Ruhrstahl and Heraeus in 1957, so it is referred to as the RH method. After the 1980s, the number of RH units has grown rapidly, and the function has changed from being mainly used for dehydrogenation to being mainly used for deep decarburization and deoxidation, removal of inclusions and other multi-functional refining equipment outside the furnace. The RH refining furnace has to withstand the high-speed scouring of air flow and molten steel for a long time during use, and the working conditions are very harsh. Among all the equipment that constitutes the RH furnace, the working conditions of the dipping tube immersed in molten steel for a long time are the worst. The inner wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/047C04B35/622
CPCC04B35/047C04B35/62204C04B2235/3208C04B2235/3241C04B2235/3418C04B2235/3244C04B2235/3206C04B2235/3826C04B2235/3427C04B2235/3463C04B2235/5216C04B2235/402C04B2235/428C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615C04B2235/9669Y02P10/20
Inventor 刘孟张剑君万菲彭著刚叶途明秦世民
Owner 武汉钢铁有限公司