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Dry type ramming material for continuous casting tundish

A dry ramming material, continuous casting tundish technology, applied in foundry equipment, casting melt containers, manufacturing tools, etc., can solve the problems of reduced erosion resistance, high labor intensity, low strength, etc., and achieve high service life , Improve the effect of longevity and high strength

Inactive Publication Date: 2009-10-14
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (2) Low strength and reduced erosion resistance;
[0011] (3) Manual application, high labor intensity and low efficiency

Method used

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  • Dry type ramming material for continuous casting tundish
  • Dry type ramming material for continuous casting tundish

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Experimental program
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Effect test

Embodiment

[0026] 1. Recipe design

[0027] According to the invention shown in Table 1, the dry ramming material for the continuous casting tundish is prepared, and the specific formula is shown in Table 2.

[0028] Table 2: Continuous casting tundish dry ramming mix formulation

[0029]

[0030] The technical indicators of fused magnesia are: MgO≥96%; Si0 2 ≤2.2%; CaO≤2.0%.

[0031] The technical indicators of iron powder are: total iron ≥ 90%.

[0032] The resin used in this example is the solid resin of Jinan Shengquan Group Co., Ltd. whose product model is PF-4014, and its indexes meet the requirements of free phenol≤2.3%; bond strength≥5.5Mpa; fixed carbon≥70%; softening point≥2.3% 105°C requirement.

[0033] The index of sodium hexametaphosphate is:

[0034] Table 3: the index of the sodium hexametaphosphate used in the embodiment of the present invention

[0035] Total phosphorus hydrochloric acid (with P 2 O 5 meter) content

＞68.0％

Inactive pho...

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Abstract

The invention belongs to the field of iron and steel smelting. The technical problem which the invention aims to solve is to prolong the service life of the ladle in the prior art. The technical proposal for solving the technical problem is to provide a dry type ramming material for a continuous casting tundish. The dry type ramming material for the continuous casting tundish is prepared by raw materials according to the following weight ratio: 55 percent to 65 percent of refractory aggregate, 10 percent to 20 percent of refractory powder, 4 percent to 8 percent of additive, and 5 percent to 7 percent of binder. The dry type ramming material for the continuous casting tundish has high resistance strength, low porosity and simple construction, can significantly prolong the service life of the working layer of the tundish, and has good application prospect.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, in particular to a dry ramming material for a continuous casting tundish, which is mainly used for preparing a working layer of a continuous casting tundish in a steelmaking process. Background technique [0002] The continuous casting tundish is a refractory container that receives molten steel poured from the ladle, and then distributes it to each mold from the tundish nozzle. What it does is: [0003] (1) Reduce the static pressure of molten steel, maintain a stable molten steel level in the tundish, and inject molten steel into the mold in a balanced manner; [0004] (2) Promote the inclusions in the molten steel to float further to purify the molten steel; [0005] (3) Divide molten steel. For multi-strand casters, the molten steel is distributed to each mold through the tundish; [0006] (4) Storage of molten steel. The pulling speed is not reduced when the ladle is replaced in t...

Claims

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Application Information

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IPC IPC(8): C04B35/66B22D41/02
Inventor 李亮张学锋
Owner PANZHIHUA UNIV