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Long-life anticorrosive submersed nozzle for smelting stainless steel, and production method thereof

A corrosion-resistant, long-life technology, used in casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problem of corrosion resistance at the slag line, the spalling performance cannot meet the requirements, the flow of molten steel cannot be controlled, and the melting loss rate is fast. and other problems, to achieve the effect of improving high temperature corrosion resistance, obvious service life and low porosity

Pending Publication Date: 2019-08-23
鞍山市和丰耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, it is used for smelting stainless steel and other high-quality steel tundishes for the damage of long pouring time immersion nozzles. The main defects are that the corrosion resistance and peeling performance of the slag line cannot meet the requirements, and the rate of melting loss is too fast to meet the long pouring times. In the process of molten steel pouring, if the slag line of the submerged nozzle is seriously eroded, the residual thickness is too thin, it is easy to break, and the flow of molten steel cannot be controlled, which will cause a large production accident

Method used

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  • Long-life anticorrosive submersed nozzle for smelting stainless steel, and production method thereof
  • Long-life anticorrosive submersed nozzle for smelting stainless steel, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Various raw materials are proportioned by weight: 26 parts of calcium oxide stabilized zirconia 40 mesh, 28 parts of calcium oxide stabilized zirconia 100 mesh, 20 parts of calcium oxide stabilized zirconia 325 mesh, 10 parts of baddeleyite 325 mesh, 8 parts of 598 flake graphite, 1 part of 98SiC powder, 3 parts of metal Si powder, B 4 C powder is 1 part, calcium hexaaluminate 180 mesh is 3 parts, liquid resin is 8 parts, and solid resin powder is 1 part.

[0039]The production method of the submerged nozzle with corrosion resistance and long service life, the production method of the sludge at the slag line part includes the following steps:

[0040] 1) Weigh the ingredients according to the raw material composition, particle size and weight ratio, the tolerance is less than 0.02 kg, and seal it for later use;

[0041] 2) 10 parts of baddeleyite 325 mesh, 98SiC powder, metal Si powder, B 4 C powder, calcium hexaaluminate 180 mesh, solid resin powder, pre-mixed with a...

Embodiment 2

[0047] Various raw materials are proportioned by weight: 28 parts of calcium oxide stabilized zirconia 40 mesh, 26 parts of calcium oxide stabilized zirconia 100 mesh, 34 parts of calcium oxide stabilized zirconia 325 mesh, 10 parts of normal 598 flake graphite, 3 parts of 98SiC powder, 2 parts of metal Si powder, B 4 C powder is 2 parts, calcium hexaaluminate 180 mesh is 5 parts, liquid resin is 6 parts, and solid resin powder is 1.5 parts.

[0048] The production method of the submerged nozzle with corrosion resistance and long life: 7 parts of calcium oxide stabilized zirconia 325 mesh, 98SiC powder, metal Si powder, B 4 C powder, calcium hexaaluminate 180 mesh, solid resin powder are used as premixed powder, others are mixed as main ingredients, and the remaining methods are the same as in Example 1.

Embodiment 3

[0050] Various raw materials are proportioned by weight: 22 parts of calcium oxide stabilized zirconia or baddeleyite 40 mesh, 14 parts of calcium oxide stabilized zirconia 100 mesh, 8 parts of baddeleyite 100 mesh, 325 parts of calcium oxide stabilized zirconia Mesh is 8 parts, baddeleyite 325 mesh is 18 parts, normal 598 flake graphite is 13 parts, 98SiC powder is 4 parts, metal Si powder is 4 parts, B 4 C powder is 2.5 parts, calcium hexaaluminate 180 mesh 4 parts, liquid resin is 5 parts, and solid resin powder is 0.5 parts.

[0051] The production method of the submerged nozzle with corrosion resistance and long life: 18 parts of baddeleyite 325 mesh, 98SiC powder, metal Si powder, B 4 C powder, calcium hexaaluminate 180 mesh, and solid resin powder are used as premixed powder, and others are mixed as main ingredients, and the rest of the method is the same

[0052] Example 1.

[0053] In the embodiment of the present invention, 60 casters are used in the 1450 casting m...

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Abstract

The invention discloses a long-life anticorrosive submersed nozzle and a production method thereof. The slag line position material of the long-life anticorrosive submersed nozzle comprises, by weight, 20-30 parts of calcium oxide stabilized zirconia or baddeleyite with a size of 40 meshes, 20-30 parts of calcium oxide stabilized zirconia or baddeleyite with a size of 100 meshes, 25-35 parts of calcium oxide stabilized zirconia or baddeleyite with a size of 325 meshes, 5-15 parts of flake graphite, 0-5 parts of SiC powder, 0.5-5 parts of metal Si powder, 0-3 parts of B4C powder, 2-6 parts of calcium hexaluminate with a size of 180 meshes, 4-8 parts of liquid resin and 0-2 parts of solid resin powder. The high-temperature anticorrosion property of the slag line position refractory materialof the submersed nozzle is improved by optimizing the process ratio of the slag line position refractory material of the submersed nozzle and introducing an extruding granulation technology; and the infiltration and erosion induced deterioration melting loss and shedding of the slag line position of the submersed nozzle are delayed to prolong the service life of the submersed nozzle.

Description

technical field [0001] The invention relates to a functional refractory material for smelting pure steel in the tundish of a steelmaking plant, in particular to an erosion-resistant and long-life submerged nozzle for smelting stainless steel and a production method thereof. Background technique [0002] The submerged nozzle is a device used to protect and control the flow of molten steel from the tundish into the mold. The submerged nozzle not only provides a guarantee for a stable steel flow, but also has the function of isolating the atmosphere to prevent the secondary oxidation of the molten steel and preventing the cooling of the molten steel. It is an extremely important functional refractory material. See figure 1 . [0003] Therefore, for submerged nozzles, the inner layer of refractory materials must resist the erosion and erosion of high-temperature molten steel flowing out of the tundish, and the slag line of the outer layer of refractory materials must be eroded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/482C04B35/622C04B35/626B22D41/54
CPCB22D41/54C04B35/481C04B35/482C04B35/622C04B35/62605C04B2235/3208C04B2235/3222C04B2235/3821C04B2235/3826C04B2235/425C04B2235/428C04B2235/77C04B2235/9676
Inventor 李涛孙逊张程徐福余李志义吴比
Owner 鞍山市和丰耐火材料有限公司
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