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

A kind of technology that improves the nickel yield in ferronickel production

A technology of yield and process, applied in the field of nickel yield, can solve the problems of rising stainless steel smelting cost, driving up the production cost of electrolytic nickel, and increasing the difficulty of mining, so as to promote the settlement of nickel metal, increase the furnace temperature, The effect of unit cost reduction

Active Publication Date: 2021-05-28
江苏江南铁合金有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of my country's stainless steel industry, the disadvantage of my country's lack of nickel resources is further exposed. my country's booming stainless steel industry must face these two problems: First, the current pricing power of the nickel market is not in my country, and the domestic spot nickel price basically follows the LME Nickel fluctuations; second, the gradual reduction of global nickel sulfide ore resources and the increase in mining difficulty will inevitably push up the production cost of electrolytic nickel, and the cost of stainless steel smelting will inevitably rise
If the production process is not further improved, the loss will be great

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
  • A kind of technology that improves the nickel yield in ferronickel production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put the waste nickel and steel scrap prepared in proportion into the alkaline crucible of the intermediate frequency induction furnace, and spread the bottom slag accounting for 2.1% of the furnace charge on the bottom of the crucible. The bottom slag is composed of: lime 72% and fluorite 28%; When the temperature is 1575°C, the charge forms a molten pool in the crucible, and the bottom slag is melted and covered on the alloy liquid; insert the muzzle of the oxygen blowing device 22cm below the liquid level of the alloy liquid, and the oxygen blowing device is under a pressure of 0.15Mpa Blow oxygen into the alloy liquid for 16 minutes for dephosphorization, analyze phosphorus and sulfur before the sampling furnace, and add composite flux after passing the test; the components of the composite flux are composed as follows by weight percentage: 38% coke powder, 25% quartz, 31% oxidized Calcium, 6% magnesium oxide, wherein the particle size of coke powder is 100-150 mesh, ...

Embodiment 2

[0030] Put the waste nickel and steel scrap prepared in proportion into the alkaline crucible of the intermediate frequency induction furnace, and spread the bottom slag accounting for 2.3% of the furnace charge on the bottom of the crucible. The bottom slag is composed of: 75% lime and 25% fluorite; When the temperature is 1595°C, the charge forms a molten pool in the crucible, and the bottom slag is melted and covered on the alloy liquid; insert the muzzle of the oxygen blowing device 30cm below the liquid level of the alloy liquid, and the oxygen blowing device is under a pressure of 0.2Mpa Blow oxygen into the alloy liquid for 20 minutes for dephosphorization, analyze phosphorus and sulfur before the sampling furnace, and add composite flux after passing the test; the components of the composite flux are composed as follows by weight percentage: 35% coke powder, 25% quartz, 35% oxidized Calcium, 5% magnesium oxide, wherein the particle size of coke powder is 100-150 mesh, the...

Embodiment 3

[0032] Put the waste nickel and steel scrap prepared in proportion into the alkaline crucible of the intermediate frequency induction furnace, and spread the bottom slag accounting for 2.5% of the furnace charge on the bottom of the crucible. The bottom slag is composed of: 70% lime and 30% fluorite; When the temperature is 1600°C, the charge forms a molten pool in the crucible, and the bottom slag is melted and covered on the alloy liquid; insert the muzzle of the oxygen blowing device 35cm below the liquid level of the alloy liquid, and the oxygen blowing device is under a pressure of 0.2Mpa Blow oxygen into the alloy liquid for 20 minutes for dephosphorization, analyze phosphorus and sulfur before the sampling furnace, and add composite flux after passing the test; the components of the composite flux are composed as follows by weight percentage: 35% coke powder, 20% quartz, 35% oxidized Calcium, 10% magnesium oxide, wherein the particle size of coke powder is 100-150 mesh, ...

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

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
particle size (mesh)aaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a process for improving the nickel yield in the production of ferronickel. The process flow comprises the following steps: charging charge→adding bottom slag→melting in furnace→blowing oxygen and dephosphorizing→adding composite flux→casting from furnace→ferronickel alloy; The components of the added composite flux are composed by weight percentage as follows: 30-40% coke powder, 20-30% quartz, 30-35% calcium oxide, 5-10% magnesium oxide, and the weight of the above-mentioned components The sum of the content percentages is 100%; after adding the composite flux, the furnace temperature needs to be raised to 1600-1680°C for slag adjustment, and the slag is released from the furnace after the slag adjustment is completed. By adding a composite flux composed of coke powder, quartz, calcium oxide and magnesium oxide, the invention can effectively increase the furnace temperature, reduce the viscosity of slag, promote the sedimentation of nickel metal, increase the content of nickel in ferronickel, and reduce the dosage of nickel metal in the finished product; The nickel recovery rate of the process can reach more than 98.5%, and the unit cost of producing ferronickel can be reduced by more than 20%.

Description

technical field [0001] The invention relates to the technical field of ferronickel production, in particular to a process for improving the nickel yield in ferronickel production. Background technique [0002] The main use of nickel is to manufacture stainless steel, high-nickel alloy steel and alloy structural steel, which are widely used in various military manufacturing industries such as aircraft, radar, missiles, tanks, ships, spacecraft, atomic reactors; in civilian industries, nickel is often Made of structural steel, acid-resistant steel, heat-resistant steel, etc., it is widely used in machinery manufacturing and petroleum industry; nickel and chromium, copper, aluminum, cobalt and other elements can form non-ferrous alloys. Nickel-based alloys and nickel-chromium-based alloys are high-temperature-resistant and oxidation-resistant materials, which are used to manufacture jet turbines, resistors, electric heating elements, high-temperature equipment structural parts,...

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 Patents(China)
IPC IPC(8): C21C5/54C21C7/064C21C7/00C22C35/00
CPCC21C5/54C21C7/0037C21C7/064C22C35/00
Inventor 梅泽锋宋雪建夏宏梁
Owner 江苏江南铁合金有限公司