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A kind of magnesia environmental protection taphole clay for submerged arc furnace and preparation method thereof

A submerged arc furnace and magnesia technology, which is applied in the field of magnesia environmental protection taphole clay for submerged arc furnaces and its preparation, can solve the problem of carbon oxidation in the material, which cannot be effectively solved, reduce the corrosion resistance of the material, and increase the amount of smelting metal. Phosphorus and other issues, to achieve the effect of no decline in performance and operating performance, excellent volume stability, and reducing internal stress

Active Publication Date: 2022-02-01
湖南鑫玺新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"A taphole mud for submerged arc furnace and its preparation method" (CN105237012B) patent technology, using bauxite, kyanite, brown corundum, chromium oxide, silicon carbide and silicon micropowder as raw materials, and dihydrogen phosphate Aqueous aluminum solution is used as a binder, and the clay used for submerged arc furnaces is obtained by mixing, grinding and squeezing. The main disadvantage of this technology is that the chromium oxide used will pose a greater threat to human health and safety, and the phosphoric acid binder will increase Phosphorus element in metal smelting, and phosphoric acid hardens quickly, so it is difficult to preserve for a long time
"Alkaline anhydrous taphole mud for submerged electric furnace" (CN103896607B) patented technology, using fused magnesia, chrome sand, graphite chips, asphalt powder, spinel, rare earth oxides, cellulose and dextrin as raw materials, with Resin and tar are used as binders to prepare blast clay for submerged electric furnaces with better plasticity, but the material also contains chromium trioxide that pollutes the environment. The production and use of asphalt and tar pollute the environment a lot, and this technology is harmful to the environment. The problem of carbon oxidation in materials has not been effectively solved
"Environmentally friendly anhydrous taphole clay for submerged arc furnace and its preparation method" (CN106673677B) patent technology, using forsterite, magnesia, quartz, coke, pitch, silicon carbide, clay, nitride and kyanite as raw materials, and carbon Black oil and decrystallized anthracene oil are used as binders to make relatively environmentally friendly anhydrous taphole clay. The main disadvantage of this technology is that the material still contains asphalt that pollutes the environment, and adding too much clay and quartz will not only shrink the material after sintering If it is too large, the high temperature strength of the material will be low, and the corrosion resistance of the material will be significantly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Magnesium Environmental Protection of Magnesium and Its Preparation Methods for Mineral Heating Furnaces. The preparation method of this embodiment is:

[0041] First take 40% by weight sintered magnesium sand, 15 wt% magnesia, 10% by weight of zirconia stone fine powder, 15 wt% silicon carbide fine powder, 5 wt% silicon line stone fine powder, 10 wt% of seafubbles Powder, 1 wt% single silicon fine powder, 1 wt% of the ball well-powder, 1 wt% microcrystinal graphite fine powder and 2 wt% of the cerium oxide micro powder are raw materials, and then add 0.1% by weight of polypropylene fibers, 1 wt% Trimethyl glycine and 20 wt% composite binding agent, wet milling for 30 minutes, then crushed into the mortium, and the mineral heat furnace was produced by magnesium.

[0042] The composite binding agent is made of 20 wt% nickel-modified phenolic resin and 80% by weight modified tar.

Embodiment 2

[0044] Magnesium Environmental Protection of Magnesium and Its Preparation Methods for Mineral Heating Furnaces. The preparation method of this embodiment is:

[0045] First take 60 wt% sintered magnesium sand, 5 wt% magnesia, 12 wt% zirconia stone fine powder, 5 wt% silicon carbide fine powder, 5 wt% silicon line stone fine powder, 5 wt% of seafubbles Powder, 2 wt% of single-piece silicon fine powder, 2 wt% ball well-powder, 3 wt% microcrystinal graphite micro powder and 1 wt% of the fine powder fine powder, plus the raw material 0.3% by weight of polypropylene fibers, 3 wt% Trimethyl glycine and 8 wt% composite binding agent, wet milling for 15 minutes, then crushed into mud, and produced magnesium-containing cannon.

[0046] The composite binding agent is made of 23 wt% nickel-modified phenolic resin and 77 wt% modified tar.

Embodiment 3

[0048] Magnesium Environmental Protection of Magnesium and Its Preparation Methods for Mineral Heating Furnaces. The preparation method of this embodiment is:

[0049] First, 42 wt% sintered magnesium sand, 6 wt% magnesium Alon, 20 wt% zirconia stone fine powder, 7 wt% silicon carbide fine powder, 8 wt% silicon line stone fine powder, 6 wt% sea bubbles Powder, 5 wt% of single-tapered silicon powder, 3 wt% ball well-powder, 2 wt% microcrystinal graphite micro powder and 1 wt% of cerium oxide micro powder are raw materials, and then add 0.2% by weight of polypropylene fibers, 2 wt% Trimethyl glycine and 15 wt% composite binding agent, wet milling for 20 minutes, then crushed into the crushing machine, producing mineral heat furnace magnesium environmentally friendly.

[0050] The composite binding agent is made of 25 wt% nickel-modified phenolic resin and 75 wt% modified tar.

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Abstract

The invention relates to a magnesia environment-friendly gun clay for a submerged arc furnace and a preparation method thereof. Its technical scheme is: first use 40-60wt% sintered magnesia, 5-15wt% magnesia aron, 10-20wt% zircon mullite fine powder, 5-15wt% silicon carbide fine powder, 5-15wt% % sillimanite fine powder, 5-10wt% sepiolite fine powder, 1-5wt% elemental silicon fine powder, 1-5wt% ball clay fine powder, 1-5wt% microcrystalline graphite fine powder and 1-5wt% 2wt% strontium oxide micropowder as raw material, plus 0.1-0.3wt% polypropylene fiber, 1-3wt% trimethylglycine and 8-20wt% composite binder, wet milling for 15-30 minutes, Then, the mud is extruded by a mud extruding machine to obtain the magnesia environment-friendly gun mud for the submerged arc furnace. The magnesia environment-friendly gun clay for submerged arc furnaces prepared by the invention has the characteristics of being environmentally friendly, long in storage time, good in oxidation resistance, high in strength, excellent in corrosion resistance and capable of repairing tapholes.

Description

Technical field [0001] The present invention belongs to the artillery technology of the ore heat furnace. Specifically, a magnesium environmentally friendly cannula and its preparation method thereof are related to a mineral heat furnace. Background technique [0002] The mineral heat furnace is a must-have equipment for iron alloy industries, manganese iron, chromium iron and nickel-iron alloy. It is not completely statistically, there are more than 30,000 mineral heat furnaces (Zeng Zheze. Large-capacity mineral heat furnace design Effective pathway for electrical efficiency and thermal efficiency. Iron alloy, 2010 (41): PP26-29. Iron mouth cannula is one of the important refractories in the ore heat furnace, which is directly affected by the production of performance. Overall, when the slag iron is not exhausted, the artillery is filled in the iron exit, so that the iron port maintains sufficient depth; when iron is iron, the artillery center in the iron mouth is drilled out o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/043C04B35/622C04B2235/3463C04B2235/3826C04B2235/3445C04B2235/349C04B2235/3213C04B2235/425C04B2235/3481C04B2235/428C04B2235/77C04B2235/96C04B2235/9676C04B2235/9607
Inventor 张志韧李亚伟徐义彪姜美平桑绍柏
Owner 湖南鑫玺新材料有限公司
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