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Method for recycling springback material of RH dip pipe gunning material

A recycling method and gunning material technology, which is applied in the field of refractory material recycling, can solve the problems of gunning material waste, less research, and affecting the working environment, and achieve the effects of simplifying production ratios, improving high-temperature strength, and reducing steel consumption per ton

Active Publication Date: 2020-11-20
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, RH gunning materials for dipping pipes with suitable formulas are often studied. For the springback materials attached to the dipping pipes during the gunning maintenance process, which are easily affected by the external environment and fall off around the gunning equipment, the existing There are relatively few technical studies, but these springback materials not only affect the working environment on site, but also cause waste of gunning materials

Method used

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  • Method for recycling springback material of RH dip pipe gunning material
  • Method for recycling springback material of RH dip pipe gunning material
  • Method for recycling springback material of RH dip pipe gunning material

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This embodiment discloses a method for recycling rebound material of RH dip tube gunning material, which includes the following steps:

[0060] 1) Collect the rebound material of the RH dip tube gunning material scattered around the gunning vehicle and the RH vacuum furnace into a collecting hopper near the RH vacuum furnace, and place it for 24 hours; use the radiant heat of the RH vacuum furnace to remove the gunning material back Most of the moisture in the ammunition.

[0061] 2) the rebound material collected in step 1) is further selected to be collected with a half-ton bag, and then primary screening is carried out. The sieve particle size selected by the primary screening is 10mm, and the primary screening undersize is collected;

[0062] 3) Heat-treat the primary screening undersize collected in step 2) at 200° C.; usually for 4 hours to further remove the moisture in the primary screening undersize.

[0063] 4) The heat-treated material in step 3) is crushed ...

Embodiment 2

[0073] This embodiment discloses a method for recycling rebound material of RH dip tube gunning material, which includes the following steps:

[0074] 1) Collect the rebound material of the RH dip tube gunning material scattered around the gunning vehicle and the RH vacuum furnace into a collecting hopper near the RH vacuum furnace, and place it for 36 hours; use the radiant heat of the RH vacuum furnace to remove the gunning material back Most of the moisture in the ammunition.

[0075] 2) the rebound material collected in step 1) is further selected to be collected with a half-ton bag, and then primary screening is carried out. The sieve particle size selected by the primary screening is 15mm, and the primary screening undersize is collected;

[0076] 3) Heat-treat the primary screening undersize collected in step 2) at 150° C.; usually for 5 hours to further remove the moisture in the primary screening undersize.

[0077] 4) The heat-treated material in step 3) is crushed ...

Embodiment 3

[0087] This embodiment discloses a method for recycling rebound material of RH dip tube gunning material, which includes the following steps:

[0088] 1) Collect the rebound material of the RH dipping tube gunning material scattered around the gunning vehicle and the RH vacuum furnace into a collecting hopper near the RH vacuum furnace, and place it for 48 hours; use the radiant heat of the RH vacuum furnace to remove the gunning material back Most of the moisture in the ammunition.

[0089] 2) the rebound material collected in step 1) is further selected to be collected with a half-ton bag, and then primary screening is carried out, and the sieve particle size selected by the primary screening is 20mm, and the primary screening undersize is collected;

[0090] 3) The primary screening undersize collected in step 2) is subjected to heat treatment at 200°C; usually for 6 hours to further remove the moisture in the primary screening undersize.

[0091] 4) The heat-treated mater...

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Abstract

The invention discloses a method for recycling a springback material of an RH dip pipe gunning material, and belongs to the technical field of refractory material recycling. The recycling method comprises the following steps: collecting springback materials of RH dip pipe gunning materials scattered around gunning equipment and an RH vacuum furnace, then carrying out preheating treatment, carryingout primary screening, carrying out heat treatment, crushing and then carrying out secondary screening, and compounding an obtained secondary screened undersize product with a binding agent and a magnesian raw material for producing the magnesian gunning material. Compared with a conventional gunning material raw material, the gunning springback raw material obtained through the recycling methodis high in iron oxide content but low in moisture content, gunning treatment is conducted on the RH dip pipe after the gunning springback raw material is compounded with the conventional gunning material raw material, and the treatment effect can reach that of a conventional gunning material product.

Description

technical field [0001] The invention relates to a RH dipping tube gunning material, which belongs to the technical field of refractory material recovery, and in particular relates to a method for recycling rebound material of RH dipping tube gunning material. Background technique [0002] In the iron and steel metallurgy industry, the RH furnace is an important equipment for molten steel refining. The RH refining furnace is composed of a vacuum chamber and an exhaust system equipped with dip tubes, such as risers and downcomers. The dip tube is an important part of the RH refining furnace, and the working conditions are very harsh. The inner pipe is generally built with magnesia-chrome bricks or magnesia spinel bricks with precise dimensions, and the space between the bricks and the steel structure is filled with self-flowing materials. The steel structure is welded with anchors and protected by pouring corundum refractories. When the molten steel in the ladle is subjected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/047
CPCC04B35/047C04B2235/3208C04B2235/3222C04B2235/447C04B2235/5427
Inventor 徐志华刘毅周辉孙枫
Owner WUGANG REFRACTORY CO LTD
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