Process of comprehensively utilizing high temperature nickel smelting slag

A technology of molten slag and high temperature, which is applied in the field of comprehensive utilization of high-temperature nickel smelting molten slag, which can solve the problems of high price, high consumption, and inability to make colored glass-ceramics, etc., and achieve high value-added utilization and cost saving effects

Inactive Publication Date: 2007-08-22
JINCHUAN GROUP LIMITED +1
View PDF1 Cites 60 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this test is that it only takes into account the extraction of iron and valuable metals nickel, copper and cobalt from nickel smelting slag, and the yield of these metals is low. Although the secondary slag can be used to produce cement, these The economic profit of the product simply cannot make up for the high cost of the smelting process
However, in the nickel slag iron extraction process mentioned in this process, there is a heating process that consumes a lot of energy; and the iron in the secondary slag cannot be reduced to below 1%, and it cannot be made into a colorful one with a good decorative function. Glass-ceramics; and the use of reducing agents such as SiC, ferrosilicon, ferro-titanium, etc. in this process, the price is high, resulting in the high cost of nickel slag treatment

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
  • Process of comprehensively utilizing high temperature nickel smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials are proportioned by weight: 74.74% of molten nickel smelting slag, 18.99% of limestone, and 6.26% of coke; the molten slag after iron removal is discharged into the glass clarification and homogenization device with 3% of the total amount of NaNO added to the glass melt 3 As a clarifying agent, 2% Cr 2 O 3 As a nucleating agent.

[0025] The weight percentages of the main chemical components of the above-mentioned molten nickel smelting slag are: Ni 0.23%, Cu 0.16%, Co 0.03%, FeO 50.25%, CaO 3.37%, MgO 8.86%, SiO 2 34.61%, A1 2 O 3 2.26%. The above-mentioned limestone, CaO content is 50%, Fe 2 O 3 The content is 0.10%. The above sodium nitrate, NaNO 3 The content is 98.5%, Fe 2 O 3 The content is 0.005%.

[0026] Discharge the molten nickel smelting slag into the cupola of the smelting reduction unit and add batch materials and reducing agent for slag-iron separation treatment. Keep the temperature at 1500°C for 120 minutes; desulfurize the reduced iron, n...

Embodiment 2

[0029] The raw materials are proportioned by weight: 68.29% of molten nickel smelting slag, 26% of limestone, and 5.71% of coke; the molten slag after iron removal is discharged into the glass clarification and homogenization device with 3% of the total amount of NaNO added to the glass melt 3 As a clarifying agent, 2% Cr 2 O 3 As a nucleating agent.

[0030] The weight percentages of the main chemical components of the above-mentioned molten nickel smelting slag are: Ni 0.23%, Cu 0.16%, Co 0.03%, FeO 50.25%, CaO 3.37%, MgO 8.86%, SiO 2 34.61%, A1 2 O 3 2.26%. The above-mentioned limestone, CaO content is 50%, Fe 2 O 3 The content is 0.10%. The above sodium nitrate, NaNO 3 The content is 98.5%, Fe 2 O 3 The content is 0.005%.

[0031] Discharge the molten nickel smelting slag into the cupola of the smelting reduction unit and add batch materials and reducing agent for slag-iron separation treatment. Keep the temperature at 1500°C for 120 minutes; desulfurize the reduced iron, nickel...

Embodiment 3

[0034] The raw materials are proportioned by weight: molten nickel smelting slag 77.525%, limestone 16.19%, coke 6.29%; the molten slag after iron removal is discharged into the glass clarification and homogenization device with 3% NaNO added to the total glass melt 3 As a clarifying agent, 2% Cr 2 O 3 As a nucleating agent.

[0035] The weight percentages of the main chemical components of the above-mentioned molten nickel smelting slag are: Ni 0.30%, Cu0.116%, Co 0.019%, FeO 47.33%, CaO 4.13%, MgO 9.32%, SiO 2 34.69%, Al 2 O 3 3.15%, other 1.15%. The above limestone, CaO content is 50%, Fe 2 O 3 The content is 0.10%. The above sodium nitrate, NaNO 3 The content is 98.5%, Fe 2 O 3 The content is 0.005%.

[0036] Discharge the molten nickel smelting slag into the cupola of the smelting reduction unit and add batch materials and reducing agent for slag-iron separation treatment. Keep the temperature at 1500°C for 120 minutes; desulfurize the reduced iron, nickel, copper, and cobalt...

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
hardnessaaaaaaaaaa
flexural strengthaaaaaaaaaa
hardnessaaaaaaaaaa
Login to view more

Abstract

The present invention relates to process of comprehensive utilization of smelting slag, and is especially technological process of comprehensively utilizing high temperature nickel smelting slag in extracting iron and producing microcrystal glass. The present invention features that the nickel smelting slag is first reduced in high temperature molten state to reduce its metal iron and nickel so as to obtain ferronickel alloy or alloy steel, and the residual molten silicate slag is heat maintained, homogenized, clarified, cast and microcrystallized to obtain microcrystal glass product. The process of the present invention utilizes nickel smelting slag in high temperature molten state, and has saving in secondary heating cost and high value utilization of nickel smelting slags.

Description

Technical field [0001] A method for comprehensively utilizing high-temperature nickel smelting molten slag relates to a comprehensive utilization method of smelting molten slag, in particular to a process method of using high-temperature nickel smelting molten slag to smelt reduction iron extraction and using nickel smelting molten slag to produce glass-ceramics. technical background [0002] At present, nearly one million tons of smelting slag is discharged every year in the non-ferrous metal nickel smelting and production process in my country. A large amount of discharged nickel smelting slag contains 31%-40% of iron, as well as nickel and other valuable metals. Since the end of the 1970s, Jinchuan Group Corporation and the Anshan Thermal Energy Research Institute of the Ministry of Metallurgical Industry at the time conducted a melting powder spray reduction test in an induction furnace, and recovered pig iron containing nickel, cobalt, and copper. From 1989 to 1991, Jinchuan...

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): C22B7/02C22C33/00C22B5/02C03C10/04C03B32/02C04B5/00
CPCY02P10/20
Inventor 倪文于晓霞兰华龙李克庆马明生
Owner JINCHUAN GROUP LIMITED
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