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Alumina-silica drainage agent and preparation method thereof

A drainage agent, aluminum-silicon technology, applied in the field of metallurgy, can solve problems such as too thick sintered layer, unfavorable free fall, and greater influence on product self-opening rate, achieve product particle size and material specific gravity, and reduce exhaust gas and dust emissions , material particle size collocation reasonable effect

Active Publication Date: 2015-04-08
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Although the performance of the chromium drainage agent is stable under high temperature conditions, due to the high requirements on the purity of molten steel in the current market, the chromium and its compounds in the chromium ore will cause metal pollution of some steel types, affect the purity of steel, and affect the environment. bad cleaning
In addition, the thermal conductivity of chrome ore is high, which can easily cause the sintered layer in the nozzle to be too thick
There is a large gap between chrome ore and siliceous sand, and it is difficult to ensure the uniformity of product particle size, which has a great impact on the self-opening rate of products
[0005] 2. The cost of chromium drainage agent is high and the bulk density is high. In the case of ensuring the standard filling nozzle, the usage amount increases, resulting in an increase in the cost of filling materials
[0006] 3. Although the cost of silicon-magnesium draining agent is low, its expansion coefficient is too large at high temperature, resulting in poor fluidity, which is not conducive to free fall, easy to cause shed material, and affect the self-opening rate of ladle

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] The aluminum-silicon drainage agent of the present invention is made of the following raw materials according to the percentage by weight, 50% of ceramic bead sand with a particle size of 0.5mm, 40% of desert quartz sand with a particle size of 0.3mm, and more than 200 mesh (particle size≤75μm) Phosphor flake graphite 5%, binder 0.2%, binder adopts liquid phenolic resin.

[0028] The ceramic bead sand contains Al 2 o 3 The weight percentage is 73%, containing SiO 2 The weight percentage is 15%.

[0029] The desert quartz sand contains SiO 2 The weight percentage is 94%.

[0030] The weight percent of fixed carbon contained in the phosphorus flake graphite is 92%.

[0031] The softening point of the adhesive is 80°C.

[0032] The aluminosilicate drainage agent, the mass percent of its active ingredient is as follows, Al 2 o 3 36.50%, SiO 2 45.10%, Fe 2 o 3 0.98%, MgO0.95%.

[0033] The method for preparing the above-mentioned aluminosilicate drainage agent ca...

Embodiment 2

[0038] The aluminum-silicon drainage agent of the present invention is made of the following raw materials according to the percentage by weight, 65% of ceramic bead sand with a particle size of 0.8mm, 30% of desert quartz sand with a particle size of 0.6mm, and more than 200 mesh (particle size≤75μm) Phosphor flake graphite 3%, binder 0.6%, binder adopts liquid phenolic resin.

[0039] The ceramic bead sand contains Al 2 o 3 The weight percentage is 80%, containing SiO 2 The weight percentage is 10%.

[0040] The desert quartz sand contains SiO 2 The weight percentage is 95%.

[0041] The weight percent of fixed carbon contained in the phosphorus flake graphite is 93%.

[0042] The softening point of the adhesive is 90°C.

[0043] The aluminosilicate drainage agent, the mass percent of its active ingredient is as follows, Al 2 o 3 52.00%, SiO 2 35.00%, Fe 2 o 3 4.26%, MgO4.92%.

[0044] The method for preparing the above-mentioned aluminosilicate drainage agent ca...

Embodiment 3

[0049] The aluminum-silicon drainage agent of the present invention is made of the following raw materials according to the percentage by weight, 80% of ceramic bead sand with a particle size of 1.2mm, 20% of desert quartz sand with a particle size of 0.9mm, and more than 200 mesh (particle size≤75μm) Phosphor flake graphite 1%, binder 1.0%, binder adopts liquid phenolic resin.

[0050] The ceramic bead sand contains Al 2 o 3 The weight percentage is 75%, containing SiO 2 The weight percentage is 5%.

[0051] The desert quartz sand contains SiO 2 The weight percentage is 96%.

[0052] The weight percent of fixed carbon contained in the phosphorus flake graphite is 95%.

[0053] The softening point of the adhesive is 100°C.

[0054] The aluminosilicate drainage agent, the mass percent of its active ingredient is as follows, Al 2 o 3 60.00%, SiO 2 23.20%, Fe 2 o 3 9.08%, MgO9.91%.

[0055] The method for preparing the above-mentioned aluminosilicate drainage agent ca...

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Abstract

The invention provides an alumina-silica drainage agent and a preparation method thereof and belongs to the field of amorphous surface fireproofing materials for steelmaking industries. According to the technical scheme, the alumina-silica drainage agent is prepared from pottery cinnabar with the granularity of 0.5-1.2mm, desert silica sand with the granularity of 0.3-0.9mm, flake graphite with the granularity smaller than or equal to 75 mu m, and an adhesive. The preparation method includes first drying the pottery cinnabar and the desert silica sand, adding the flake graphite and the adhesive, and performing stirring in a barrel type stirrer to prepare the alumina-silica drainage agent. The alumina-silica drainage agent is clean, environmentally friendly, and capable of effectively increasing a pouring rate of a product to above 98%, meanwhile substantially reducing product costs, effectively reducing discharge of exhaust gases and dust, and meeting requirements for product qualities, prices and steel liquid purity degrees in present steel industries.

Description

technical field [0001] The invention relates to metallurgy and belongs to the field of unshaped surface refractory materials used in the steelmaking industry, in particular to an aluminum-silicon draining agent for continuous casting ladle opening and a preparation method thereof. Background technique [0002] Ladle drainage agent is a refractory material with high temperature resistance, good thermal stability and strong corrosion resistance. It is used to fill the upper nozzle of the ladle during the steel pouring process to prevent the molten steel from entering the nozzle after the ladle is loaded with steel. The drainage agent can fall automatically, and then the molten steel flows into the tundish, so that the continuous casting production can run smoothly and meet the important link of high-speed continuous casting and continuous pouring. It is a necessary refractory material. [0003] At present, the drainage agents used in domestic and foreign steel mills can be div...

Claims

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Application Information

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IPC IPC(8): B22D41/46
Inventor 李秀峰朱云峰唐红波
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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