Castable for ladle collector nozzle adopting corundum collector nozzle reclaimed material as aggregate and preparation method of castable

A corundum quality, recycled material technology, applied in water resources protection and other directions, can solve rare problems and achieve the effect of improving fluidity, excellent performance, and enhancing compactness

Inactive Publication Date: 2014-03-05
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few reports on collecting part of the castables of th

Method used

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  • Castable for ladle collector nozzle adopting corundum collector nozzle reclaimed material as aggregate and preparation method of castable

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] The preparation method of the castable for the ladle nozzle using the recycled material of the corundum-based nozzle as the aggregate includes the following steps:

[0039] 1) Recover the corundum drain from the steel plant, sort and sort, remove the steel shell and remove surface impurities after natural drying;

[0040] 2) The part containing refractory materials is broken and crushed, and a roller-type magnetic field iron removal device is provided to achieve the purpose of removing large pieces of steel and slag attached to the drain;

[0041] 3) Screen according to the required particle size, and clean the screened materials for 60 minutes;

[0042] 4) After cleaning, put the sieved material into the anti-acid corrosion tank (each tank is not more than 600kg). After loading, wash with tap water for 60 minutes; after washing, add 30 kg of concentrated sulfuric acid with a molar concentration of 18 mol / L to the tank without changing the acid in the middle; after pickling for...

Example Embodiment

[0044] Example 1

[0045] The preparation method of the castable for the ladle nozzle using the recycled material of the corundum-based nozzle as the aggregate includes the following steps:

[0046] Weigh 70% of the pickled corundum sewer recycling material, 14% corundum fine powder, 10% corundum powder, 5% binding agent and 1% dispersant, and mix them in a forced mixer for 4-6 minutes Then, add water and mix for 2 to 3 minutes. After mixing, it can be poured into the designated ladle nozzle mold for vibrating casting and drying.

[0047] The corundum sewer material used for pickling in this embodiment is divided into four gradations of ≤8mm and >5mm, ≤5mm and >3mm, ≤3mm and >1mm and ≤1mm according to the particle size, and their weight percentages are respectively It is 8-15%, 25-35%, 20-30% and 25-35%.

[0048] The fine corundum powder is a mixture of plate-shaped sintered corundum powder with a particle size of 20~45μm and <20mm, and the mixing ratio is 2:1;

[0049] The corundum p...

Example Embodiment

[0051] Example 2

[0052] The preparation method of the castable for the ladle nozzle using the recycled material of the corundum-based nozzle as the aggregate includes the following steps:

[0053] Weigh 60% of the pickled corundum sewer recycling material, 15% corundum fine powder, 16.9% corundum powder, 8% binding agent and 0.1% dispersant, and mix them in a forced mixer for 4-6 minutes Then, add water and mix for 2 to 3 minutes. After mixing, it can be poured into the designated ladle nozzle mold for vibrating casting and drying.

[0054] The pickled corundum sewer recycling material described in this embodiment is divided into four gradations of ≤8mm and >5mm, ≤5mm and >3mm, ≤3mm and >1mm and ≤1mm according to the particle size, the weight percentage They are 8-15%, 25-35%, 20-30% and 25-35% respectively.

[0055] The fine corundum powder is a mixture of plate-shaped sintered corundum powder with a particle size of 20~45μm and <20mm, and the mixing ratio is 1.5:1;

[0056] The co...

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Abstract

The invention discloses castable for a ladle collector nozzle adopting a corundum collector nozzle reclaimed material as aggregate. The castable is characterized by being prepared from the following raw materials in percentage by weight: 60 to 70 percent of acid-pickled corundum collector nozzle reclaimed material, 10 to 15 percent of corundum fine powder, 10 to 18 percent of corundum micro powder, 5 to 8 percent of binding agent and 0.1 to 1 percent of dispersion agent. The preparation method comprises the following steps: recovering the corundum collector nozzle from a steel factory, and packaging the corundum collector nozzle reclaimed material for standby use after the treatment of the sorting, iron removing, crushing and acid pickling process; weighing the raw materials according to the weight percentage; uniformly mixing the weighed materials, and uniformly mixing the materials with water; pouring the mixture into a designed ladle collector nozzle mold, and vibrating, pouring, drying and molding the castable. The corundum fine powder adopts the mixture of plate-type sintered corundum fine powder with the granularity of 20 to 45 micrometers and the granularity of 0 to 20 micrometers, and the mixing ratio is optimized, so that not only can the mobility of the castable be improved, but also the gap of the castable can be effectively filled, the dense of the castable can be enhanced, and the strength is remarkably improved.

Description

technical field [0001] The invention relates to the field of recycling of waste refractory materials, in particular to a castable for ladle sewer nozzles with recycled corundum sewer nozzle materials as aggregates and a preparation method thereof. Background technique [0002] The iron and steel industry produces a large amount of waste refractory materials every year. In my country, only a small part of waste refractory materials are recycled for secondary use or downgraded for use, and they are mainly used for some low-grade repair materials. [0003] The ladle drains of domestic medium and large steel plants are generally made of corundum castables through vibration. After these ladle drains are used, except for the steel shells on the surface and the adhered scrap steel being recycled, the refractory materials are basically destroyed. Discarding and burying or using it in very low-grade repairing materials not only pollutes the environment, but also causes a serious wast...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCY02A20/402
Inventor 王志强雷中兴易碧辉田先明郑吉红姚亚双曹一卢杰李家虎
Owner WUHAN IRON & STEEL (GROUP) CORP
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