Steel-making cooling cold material-remelted steel and preparation method thereof

A technology for cold materials and raw materials, which is applied to the field of steelmaking and cooling cold materials and its preparation, can solve the problems of high production cost and low equipment operation rate, and achieve the effects of low production cost, reduction of steelmaking cost, and environmental protection resource recovery.

Active Publication Date: 2015-04-22
山西省黎城县通鑫再生资源回收利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wall of the reduction furnace is thick, resulting in low equipment operation rate and high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: A steel-making cooling cold material, in the form of a cylinder, ￠220mm × height 170mm, chemical composition mass percentage: C: 1.2%, Mn: 1.4%, S: 0.045%, P: 0.045%, Si: 0.7%, Fe: 92%, others are unavoidable impurities, apparent density: 6.5t / m 3 .

[0031] The preparation method of the above-mentioned steelmaking cooling cold material comprises the following process steps:

[0032] (1) Raw material: steel slag after magnetic separation and screening, the chemical composition mass percentage is: C: 1.2%, Mn: 1.4%, S: 0.045%, P: 0.045%, Si0.7%, Fe: 92%, Others are unavoidable impurities, the particle size is less than 60mm, and the raw materials of different particle sizes are mixed evenly;

[0033] (2) Carry out mechanical transportation, distribution and distribution of the above-mentioned raw materials to the natural gas high-temperature kiln for pre-firing, the pre-firing temperature is 300oC, and the heat preservation is 10 minutes;

[0034] (3) Rehe...

Embodiment 2

[0038] Example 2: A steel-making cooling cold material, in the form of a cuboid, 220mm × 170mm × 170mm, chemical composition mass percentage: C: 1.0%, Mn: 1.2%, S: 0.040%, P: 0.040%, Si: 0.6%, Fe: 92.5% %, others are unavoidable impurities, apparent density: 6.2t / m 3 .

[0039] The preparation method of the above-mentioned steelmaking cooling cold material comprises the following process steps:

[0040] (1) Raw material: steel slag after magnetic separation and screening, the chemical composition mass percentage is: C: 1.0%, Mn: 1.2%, S: 0.040%, P: 0.040%, Si: 0.6%, Fe: 92.5%, Others are unavoidable impurities, the particle size is less than 50mm; raw materials with different particle sizes are mixed evenly;

[0041] (2) Carry out mechanical transportation, distribution and distribution of the above-mentioned raw materials to the natural gas high-temperature kiln for pre-firing, the pre-firing temperature is 280oC, and the heat preservation is 9 minutes;

[0042] (3) Rehe...

Embodiment 3

[0046] Example 3: A steel-making cooling cold material, in the form of a cube, 170mm × 170mm × 170mm, chemical composition mass percentage: C: 0.8%, Mn: 0.9%, S: 0.038%, P: 0.040%, Si: 0.6%, Fe: 94 %, others are unavoidable impurities, apparent density: 6.1t / m 3 .

[0047] The preparation method of the above-mentioned steelmaking cooling cold material comprises the following process steps:

[0048] (1) Raw materials: steel slag after magnetic separation and screening, the chemical composition mass percentage is: C: 0.8%, Mn: 0.9%, S: 0.038%, P: 0.040%, Si: 0.6%, Fe: 94%, Others are unavoidable impurities, the particle size is less than 50mm, and the raw materials of different particle sizes are mixed evenly;

[0049] (2) Carry out mechanical transportation, distribution and distribution of the above-mentioned raw materials to the natural gas high-temperature kiln for pre-firing, the pre-firing temperature is 250oC, and keep warm for 10 minutes;

[0050] (3) Reheat at 950 ...

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Abstract

The invention relates to a steel-making cooling material and a preparation method thereof, belonging to the metallurgical industry. The technical solution is: chemical composition mass percentage: C: ≤1.2%, Mn: ≤1.4%, S: ≤0.045%, P: ≤0.045%, Si: ≤0.7%, Fe: ≥92%, others are unavoidable Impurities, apparent density: ≥5.0t / m3. The production process is that steel slag is used as raw material after magnetic separation and screening, pre-firing temperature is 200-300oC, heat preservation is 8-15 minutes, heating temperature is 800-1100oC, molding temperature is 700-1000oC, molding pressure is 950-1100t. The invention has the beneficial effects of being beneficial to energy saving, emission reduction, environmental protection and resource recovery, shortening the smelting cycle, increasing the metal yield, reducing the cost of steelmaking, and alleviating the serious shortage of scrap steel. The invention has the advantages of simple process, low production cost and low energy consumption.

Description

technical field [0001] The invention relates to a steel-making cooling material and a preparation method thereof, belonging to the technical field of steel slag recycling and utilization in the metallurgical industry. Background technique [0002] my country's steel production ranks first in the world. Due to the excess heat in the converter steelmaking process, a certain amount of coolant needs to be added to accurately hit the end point temperature. Through the research and practice of converter iron-containing cold material structure optimization, different types of iron-containing coolants are used. Materials have different impacts on blowing process operation, steel material consumption and production costs. Usually, the ferrous cold material used in the converter is selected as the coolant, depending on the following factors: [0003] (1) Whether the iron-containing material resources are sufficient; [0004] (2) Whether the purchase price of iron-containing cold mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22B9/16
Inventor 陈秋生陈静修刘凤鸣刘永明唐庆利
Owner 山西省黎城县通鑫再生资源回收利用有限公司
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