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A kind of waterless gunpowder and preparation method thereof

A technology of anhydrous taphole mud and asphalt, which is applied in the field of ironmaking auxiliary materials, can solve the problems affecting the effective maintenance of blast furnace conditions, the decrease of strength and slag resistance, and the poor bonding performance of anhydrous foam mud, achieving excellent thermal stability and Slag resistance, increase strength and slag resistance, and reduce the loss of anhydrous foam mud

Active Publication Date: 2020-02-21
TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the poor bonding performance of the anhydrous foam mud leads to a decrease in its strength and slag resistance, which affects the effective maintenance of the stability of the blast furnace, and needs to be improved.

Method used

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  • A kind of waterless gunpowder and preparation method thereof
  • A kind of waterless gunpowder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of anhydrous taphole clay, comprises the component of following parts by weight:

[0037] 8 parts of alumina, 20 parts of silicon oxide, 30 parts of silicon carbide, 0 parts of coke, 8 parts of silicone oil, 6 parts of dimethylaminoethyl methacrylate, 2 parts of muscovite, and 18 parts of modified asphalt.

[0038] A kind of preparation method of waterless taphole mud, comprises the following steps:

[0039] Step 1: Distilling the residual fraction of the thermally cracked hydrocarbon material under reduced pressure, the pressure of the reduced pressure distillation is 1.2KPa, and the distillation temperature is 325°C to obtain hot asphalt raw material;

[0040] Step 2: Add montmorillonite and sepiolite at a weight ratio of 1:4 to the hot asphalt raw material in step 1 at a ratio of 50:1 by weight, and pass it through a mixer at a stirring speed of 60r / min and at 280°C Stir for 2 hours at a certain stirring temperature to obtain a modified asphalt with a softeni...

Embodiment 2

[0043] A kind of anhydrous taphole clay, comprises the component of following parts by weight:

[0044] 9 parts of alumina, 35 parts of silicon oxide, 34 parts of silicon carbide, 12 parts of coke, 10 parts of silicone oil, 8 parts of dimethylaminoethyl methacrylate, 3 parts of muscovite, and 20 parts of modified asphalt.

[0045] A kind of preparation method of waterless taphole mud, comprises the following steps:

[0046] Step 1: Distilling the residual fraction of the thermally cracked hydrocarbon material under reduced pressure, the pressure of the reduced pressure distillation is 2.0KPa, and the distillation temperature is 330°C to obtain hot asphalt raw material;

[0047] Step 2: Add montmorillonite and sepiolite at a weight ratio of 1:3 to the hot asphalt raw material in step 1 at a weight ratio of 25:1, and pass it through a mixer at a stirring speed of 70r / min and at 290°C Stir at the stirring temperature for 2 hours to obtain a modified asphalt with a softening poin...

Embodiment 3

[0050] A kind of anhydrous taphole clay, comprises the component of following parts by weight:

[0051] 10 parts of alumina, 50 parts of silicon oxide, 38 parts of silicon carbide, 24 parts of coke, 12 parts of silicone oil, 10 parts of dimethylaminoethyl methacrylate, 4 parts of muscovite, and 20 parts of modified asphalt.

[0052] A kind of preparation method of waterless taphole mud, comprises the following steps:

[0053] Step 1: Distilling the residual fraction of the thermally cracked hydrocarbon material under reduced pressure, the pressure of the reduced pressure distillation is 3.6KPa, and the distillation temperature is 340°C to obtain hot asphalt raw material;

[0054] Step 2: Add montmorillonite and sepiolite at a weight ratio of 1:3 to the hot asphalt raw material in step 1 at a weight ratio of 25:1, and pass through a mixer at a stirring speed of 75r / min and at 290°C Stir for 2 hours at a certain stirring temperature to obtain a modified asphalt with a softening...

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Abstract

The invention discloses anhydrous stemming and a preparation method thereof. The key points of the technical scheme of the anhydrous stemming are characterized in that the anhydrous stemming is prepared from the following components in parts by weight: 8-12 parts of aluminium oxide, 20-72 parts of silicon oxide, 30-45 parts of silicon carbide, 0-50 parts of coke, 8-16 parts of silicon oil, 6-12 parts of dimethylaminoethyl methacrylate, 2-5 parts of refractory micropowder, 18-24 parts of asphalt. The anhydrous stemming and the preparation method disclosed by the invention have the beneficial effects that by adoption of the technical scheme, the aluminium oxide, the silicon oxide, the silicon carbide and the silicon oil are used as the main raw materials of the anhydrous stemming, so that the effects of improving the property of the stemming and enhancing the strength and the erosion of the anhydrous stemming are achieved; since the silicon carbide is easily oxidized under high temperature, the added coke can play a role in effectively protecting the silicon carbide, and the molten-iron leakage caused by overlarge volume change of the anhydrous stemming under the high temperature canbe avoided; when the asphalt is matched with the dimethylaminoethyl methacrylate, the effect of obviously improving the adhesive property of the asphalt is achieved, so that the purpose of obviouslyimproving the strength and the slag resistance is achieved after the effect of improving the adhesive property of the anhydrous stemming is achieved.

Description

technical field [0001] The invention relates to an auxiliary material for ironmaking, and more specifically relates to an anhydrous taphole clay and a preparation method thereof. Background technique [0002] Anhydrous taphole clay is a kind of refractory material used in large and medium-sized blast furnaces with high top pressure and high degree of intensified smelting to seal the taphole. [0003] The Chinese patent with the notification number CN1228455C discloses a water-free foam mud for blast furnaces. The water-free foam mud includes 1-4% rough brown corundum, 2-5% fine brown corundum, and 7-15% rough mullite by weight. , 9-20% fine mullite, 15-20% coke powder, 10-19% clay, 7-11% silicon carbide, 5-8% sericite, 2-4% pitch and 15-25% anthracene oil. [0004] However, the poor bonding performance of the anhydrous foam mud leads to a decrease in its strength and slag resistance, which affects the effective maintenance of the stability of the blast furnace, and needs to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/565C04B35/14
CPCC04B35/14C04B35/565C04B35/66C04B2235/3217C04B2235/3481C04B2235/349C04B2235/48C04B2235/5248C04B2235/96
Inventor 董印香陈纪全张丽君
Owner TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD