Smelting method of phosphorus containing steel

A smelting method and technology per ton of steel, applied in the smelting field of C21C5/56 category, phosphorus-containing steel, can solve the problems of increasing smelting cost, waste of resources, environmental pollution, etc. The effect of reducing environmental pollution

Active Publication Date: 2006-06-14
LIANYUAN IRON & STEEL GROUP CO LTD
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the conventional smelting method of converter or electric furnace, in the early stage of smelting, while removing carbon [C] from molten steel, phosphorus [P] from molten steel is also removed, and the end point components of molten steel are carbon [C], silicon [Si], manganese [Mn], phosphorus [P], sulfur [S], etc. are all controlled at a low level, and then the phosphorus alloy is used to alloy the molten steel; the problem is: the phosphorus alloy is used to alloy the molten steel. The recovery rate is low, the metallurgical process is long, and the pollution to the environment is large. The phosphorus [P] resources in the molten iron are not fully utilized. Most of the phosphorus [P] in the molten iron is removed in the process of converter blowing or electric furnace smelting, and then Phosphorus alloying is used to alloy molten steel, which not only prolongs the smelting time, but also wastes resources and increases smelting costs.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Converter smelting:

[0024] The 60t converter smelts weathering steel with phosphorus content of 0.07-0.15%. At the initial stage of blowing, the oxygen lance position is controlled at 0.2m, and slagging material is added. 3 / t.min, while adding 5kg / 吨钢 Phosphorus-containing iron ore or phosphate rock, add 28.0kg / 吨钢 Phosphorus-containing iron ore or phosphate rock, the phosphorus at the end of the molten steel reaches 0.10%, so it is not necessary to add phosphorus iron or other phosphorus-containing alloys when the molten steel is alloyed, reducing the cost by 6 yuan / 吨钢 .

[0025] Electric furnace smelting:

[0026] A 30t electric furnace smelts weathering steel containing 0.07-0.15% phosphorus. In the initial stage of smelting, oxygen is supplied to the electric furnace to accelerate the melting of scrap steel and remove carbon, silicon, manganese, etc. in molten steel. The oxygen supply intensity is 2.0m 3 / t.min, add slagging material, control the basicity of...

Embodiment 2

[0028] Converter smelting:

[0029] A 50t converter smelts weathering steel with a phosphorus content of 0.07-0.15%. At the initial stage of blowing, the position of the oxygen lance is controlled at 0.6 meters, and slagging material is added. The basicity R of the primary converter slag is controlled at 2.4, and the oxygen supply intensity is 4.8m 3 / t.min, while adding 40.0kg / 吨钢 Phosphorus-containing iron ore or phosphate rock, add 2.0kg / 吨钢 Phosphorus-containing iron ore or phosphate rock, the phosphorus content in the molten steel is 0.11% when tapping, and there is no need to add phosphorus-iron or other phosphorus-containing alloys when the molten steel is alloyed, and the cost is reduced by 4.5 yuan / 吨钢 .

[0030] Electric furnace smelting:

[0031] A 100t electric furnace smelts weathering steel containing 0.07-0.15% phosphorus. In the early stage of smelting, oxygen is supplied to the electric furnace to accelerate the melting of scrap steel. After the scrap stee...

Embodiment 3

[0033] Converter smelting:

[0034] A 100t converter smelts weathering steel with a phosphorus content of 0.07-0.15%. At the initial stage of blowing, the position of the oxygen lance is controlled at 1.0m, and the slagging material is added. 3 / t.min, while adding 20.0kg / 吨钢 Phosphorus-containing iron ore or phosphate rock, add 10.0kg / 吨钢 Phosphorus-containing iron ore or phosphorus-containing ore, the phosphorus content in molten steel is 0.09% when tapping, no need to add phosphorus-iron or phosphorus-containing alloys, and the cost is reduced by 5.5 yuan / 吨钢 .

[0035] Electric furnace smelting:

[0036] A 90t electric furnace smelts weathering steel containing 0.07-0.15% phosphorus. In the early stage of smelting, oxygen is supplied to the electric furnace to accelerate the melting of scrap steel. After the scrap steel is melted into molten steel, oxygen is supplied to the molten steel in the electric furnace to remove carbon and other impurity elements. The oxygen su...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a phosphor containing steel smelting method. Converter is adopted fast heating up to eliminate carbon, save phosphor, and make high phosphor slag smelting operation. When the converter is at blowing early stage, oxygen lance positing is between 0.0-1.0meter, diacidic base degree is 1.0-2.5, oxygen supply intensity is 2.8-5.0m3/t. min, 0.5-45.0kg/ton steel barringerite or phosphate ore is added into the converter; then 1.0-30.0kg/ton is added at the blowing late stage. After scrap steel is melted with iron liquid to form molten steel in electric furnace, slag forming material is add, diacidic base degree is 1.0-2.5, oxygen supply intensity is 1.5-4.5m3/t.min. 0.5-40.0kg/ton steel barringerite or phosphate ore is added into molten steel at decarbonizing process; and 0.5-30.0kg/ton is added at smelting late stage. This smelting method can make most phosphor enter molted steel to do phosphor alloying.

Description

technical field [0001] The invention relates to a method for smelting alloy steel, in particular to a method for smelting phosphorus-containing steel, which belongs to the class C21C5 / 56 (Int.cl 4 ). Background technique [0002] Phosphorus-containing steel refers to special steel containing phosphorus, such as weather-resistant steel, and weather-resistant steel is mainly divided into weather-resistant steel for welding structures and high-weather-resistant structural steel. Both weather-resistant steels contain phosphorus (P). Electric furnace smelting. According to the conventional smelting method of converter or electric furnace, in the early stage of smelting, while removing carbon [C] from molten steel, phosphorus [P] from molten steel is also removed, and the end point components of molten steel are carbon [C], silicon [Si], manganese [Mn], phosphorus [P], sulfur [S], etc. are all controlled at a low level, and then the phosphorus alloy is used to alloy the molten s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/52
CPCY02P10/20
Inventor 吴光亮焦国华刘继申温德智周鉴梁新亮罗刚孟征兵
Owner LIANYUAN IRON & STEEL GROUP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap