Unlock instant, AI-driven research and patent intelligence for your innovation.

High-purity pig iron production system and process

A high-purity pig iron, production system technology, applied in the direction of manufacturing tools, metal processing equipment, casting molten material containers, etc., can solve problems such as unsatisfactory and lack

Inactive Publication Date: 2021-04-06
辽阳钢铁有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increasing shortage of low-phosphorus and low-sulfur resources, it can no longer meet the needs of "concentrated material method" for smelting and casting high-purity pig iron

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-purity pig iron production system and process
  • High-purity pig iron production system and process
  • High-purity pig iron production system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see Figure 1-2 , the present embodiment provides a high-purity pig iron production system and process, characterized in that: the process flow of the high-purity pig iron production system is as follows:

[0037] The first step is to pour the molten iron produced by the blast furnace containing zinc, lead and other solid waste into the molten iron ladle 1, and transport the molten iron ladle to the molten iron pretreatment system of the preset production line, and use the nitrogen spray gun on the nitrogen supply device Spray passivated magnesium into the ladle for desulfurization, the dosage of passivated magnesium is 60kg / min, last for 8-12min, desulfurization reaction:

[0038] Mg(S)+[S]=(MgS)(S).

[0039] The desulfurization capacity can reach more than 90%. In order to avoid resulfurization in the next process, the molten iron after desulfurization is slag-removed through the slag removal device 4,

[0040] The second step is to transport the pretreated molten i...

Embodiment 2

[0051] see image 3 , the present embodiment provides a kind of production process of high-purity pig iron, and the difference with embodiment 1 is: 1) the smelting device adopts the converter, and the converter model is 60t type; 2) the consumption of passivating magnesium is 500-700kg; 3) the consumption of unslaked lime 600-800kg; 4) The smelting temperature in the converter is 1350-1450°C, and the mass percentage of the data C measured through experiments is 3.05, the mass percentage of Si is 0.47, the mass percentage of Ti is 0.024, and the mass percentage of Mn is 0.044, the production index of the present invention meets the standard of "High Purity Pig Iron for Foundry-ZXB / T0001-2011" issued by China Foundry Association.

Embodiment 3

[0053] see Figure 1-2 , the present embodiment provides a production process of nodular cast iron, the difference from Example 1 is: 1) the amount of passivated magnesium is 350 kg; 2) the amount of quicklime is 350 kg; 3) the smelting temperature in the AOD furnace is 1400 ° C, The mass percentage of data C is 3.57, the mass percentage of Si is 1.56, and the mass percentage of Mn is 0.43. The production index of the present invention meets the "GB T 1348-2009 Ductile Iron Casting Standard".

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 high-purity pig iron production system and process. The high-purity pig iron production system comprises a ladle, a nitrogen supply device, a slagging-off device, a smelting device, an oxygen supply system, a feeding system, an argon supply system and an online real-time detection system, a nitrogen blowing pipeline of the nitrogen supply device is connected into the ladle, a blowing pipeline of the slagging-off device is connected to the inner side of an opening of the ladle, the smelting device and the ladle can mutually pour liquid metal in the smelting device and the ladle, an oxygen blowing pipeline of the oxygen supply system is connected to the bottom of an inner cavity of the smelting device, and a feeding port of the feeding system is formed above the ladle. The production indexes of the high-purity pig iron and the special-grade high-purity pig iron produced by the high-purity pig iron production system and process provided by the invention meet the standard of <High-Purity Pig Iron for Casting-ZXB / T00012011> published by China Casting Association, and meet the requirement of smelting the high-purity pig iron for casting by a concentrate method.

Description

technical field [0001] The invention relates to the technical field of high-purity pig iron manufacturing, and the specific field is a high-purity pig iron production system and process. Background technique [0002] With the development of high-speed trains, wind power generation, nuclear power, military industry, semiconductor materials and other industries in China, the demand for high-purity pig iron, super high-purity pig iron and high-performance cast iron is increasing day by day, but silicon, The content of manganese, sulfur, phosphorus and trace elements cannot meet the requirements of high-end castings, and the demand for high-purity pig iron and super high-purity pig iron is increasing day by day. Due to the increasing shortage of low-phosphorus and low-sulfur resources, it can no longer meet the needs of "concentrate method" for smelting and casting high-purity pig iron. Contents of the invention [0003] The purpose of the present invention is to provide a hi...

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): B22D41/00C21C7/06C21C7/064C21C7/00B22D43/00
CPCB22D41/00B22D43/005C21C7/00C21C7/0025C21C7/06C21C7/064
Inventor 解生礼
Owner 辽阳钢铁有限公司