Graphite material for continuous casting mold and preparation method thereof

A graphite material and mold technology, which is applied in the field of graphite materials for continuous casting molds, can solve the problems that cannot fully meet the performance requirements of continuous casting molds, and achieve the effects of reducing time, easy graphitization, and good comprehensive performance

Active Publication Date: 2014-02-05
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The graphite materials disclosed in the above patents cannot fully meet the performance requirements of graphite materials for continuous casting molds. In view of this, the present invention is proposed

Method used

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  • Graphite material for continuous casting mold and preparation method thereof
  • Graphite material for continuous casting mold and preparation method thereof
  • Graphite material for continuous casting mold and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The calcined coke is crushed, sieved, and batched as follows:

[0043]

[0044] Put the above materials into a kneading pot for dry mixing, stir at 39.6 rpm for 30 minutes, and the temperature of the dry materials is 130°C.

[0045] After the dry mixing is completed, add medium-temperature asphalt into the kneading pot, the mass percentage of dry material and medium-temperature asphalt is 76:24, the softening point of medium-temperature asphalt is 85°C, the coking value is ≥51%, and quinoline insolubles are ≤0.2%. The medium-temperature asphalt is first heated to 230°C, kept warm and stirred for 30 minutes, and then cooled to 140°C. The medium-temperature asphalt is added to the kneading pot twice, the first addition is 60% of the total medium-temperature asphalt, and the kneading time is 15 minutes. , the second addition is 40% of the total medium-temperature asphalt, the kneading time is 20 minutes, and the temperature of the two kneading is 140°C.

[0046] Put th...

Embodiment 2

[0053] The calcined coke is crushed, sieved, and batched as follows:

[0054]

[0055]

[0056] Put the above materials into a kneading pot for dry mixing, stir at 39.6 rpm for 40 minutes, and the temperature of the dry materials is 140°C.

[0057] After dry mixing, add medium-temperature asphalt into the kneading pot. The mass percentage of dry material and medium-temperature asphalt is 80:20. The softening point of medium-temperature asphalt is 90°C, the coking value is ≥51%, and the quinoline insolubles are ≤0.2%. Among them, the medium-temperature asphalt is first heated to 180°C, kept warm and stirred for 60 minutes, and then cooled to 150°C. The medium-temperature asphalt is added to the kneading pot twice, the first addition is 50% of the total medium-temperature asphalt, and the kneading time is 20 minutes. , the second addition amount is 50% of the total medium-temperature asphalt amount, the kneading time is 15 minutes, and the temperature of the two kneading i...

Embodiment 3

[0065] The calcined coke is crushed, sieved, and batched as follows:

[0066]

[0067]

[0068] Put the above materials into a kneading pot for dry mixing, stir at 39.6 rpm for 35 minutes, and the temperature of the dry materials is 135°C.

[0069] After the dry mixing is completed, add medium-temperature asphalt into the kneading pot, the mass percentage of dry material and medium-temperature asphalt is 78:22, the softening point of medium-temperature asphalt is 90°C, the coking value is ≥51%, and quinoline insolubles are ≤0.2%. Among them, the medium-temperature asphalt is first heated to 200°C, kept warm and stirred for 40 minutes, and then cooled to 145°C. The medium-temperature asphalt is added to the kneading pot twice, the first addition is 55% of the total medium-temperature asphalt, and the kneading time is 15 minutes. , the second addition amount is 45% of the total medium-temperature asphalt amount, the kneading time is 15 minutes, and the kneading temperature...

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Abstract

The invention relates to a preparation method of a graphite material for a continuous casting mold. The preparation method comprises the following steps: crushing, screening and burdening calcined coke, adding mid-temperature pitch, and carrying out mixing, molding, primary roasting, primary dipping, secondary roasting, secondary dipping, third roasting and graphitizing to obtain the product, wherein the particle size range and the content of the calcined coke are that the calcined coke with the particle size which is smaller than or equal to 1.0mm and greater than 0.8mm accounts for 1-2%; the calcined coke with the particle size which is smaller than or equal to 0.8mm and greater than 0.5mm accounts for 31-36%; the calcined coke with the particle size which is greater than 0.075mm and smaller than or equal to 0.5mm accounts for 28-32%; the calcined coke with the particle size which is smaller than 0.075mm accounts for 34-38%; the mixing is divided into dry blending and wet blending; the wet blending comprises the following processes: firstly heating the mid-temperature pitch to 180-230 DEG C, carrying out heat preservation and stirring for 30-60 minutes, and then adding the mid-temperature pitch to aggregate twice to knead, wherein the kneading temperature is 140-150 DEG C.

Description

technical field [0001] The invention belongs to the field of graphite materials, and in particular relates to a graphite material for continuous casting molds and a preparation method of the graphite material for continuous casting molds. Background technique [0002] Continuous casting is continuous casting. Compared with the traditional mold casting method, it has the obvious advantages of greatly improving the material yield and billet quality, and saving energy. Widely used in iron and steel, non-ferrous metals, glass casting and other industries. [0003] Casting conditions for continuous casting molds: (1) Casting temperature is 1200-1600°C, which requires graphite materials to have good oxidation resistance; (2) The purity determines the quality of the product, and the lower the ash content of graphite materials for casting, the better (3) Due to the use of graphite materials for casting at high temperatures, the materials are required to have a small thermal expansi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532C04B35/622C01B32/184C01B32/194
Inventor 张培林张培模范志利赵泽强张日清唐富李军杨晓峰
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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