Method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation

A technology of reducing iron and coal-based, applied in coal-based coking reduction roasting coke magnetic separation to produce high-nickel alloy and reduced iron, coal-based direct reduction roasting kiln and mineral optimization field, can solve the frustration of industrial production and application of gas-based shaft furnace process , Nickel recovery rate, nickel alloy grade is not high, thermal energy recycling efficiency is low, etc., to achieve the effects of easy promotion, huge energy-saving development potential, and relatively small investment

Pending Publication Date: 2022-01-21
张雷
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional process for processing nickel oxide ore is pyrometallurgy of nickel-iron alloy. This process mainly deals with metamorphic peridotite with high nickel grade. According to different reduction processes, it is divided into rotary kiln pre-reduction and shaft furnace reduction-submerged thermal electric furnace-refining method. However, due to the dilution of the reducing gas by the flue gas in the rotary kiln pre-reduction and the reduction in the shaft furnace, neither of them constitutes a s

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
  • Method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation
  • Method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation
  • Method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] A lateritic nickel ore contains 0.81% Ni and 48.17% Fe. Follow these steps:

[0081] (1) Raw material treatment: Ni0.81%, Fe48.17% laterite nickel ore is sieved and granulated, heated and dried, crushed and screened to obtain dry nickel ore particle materials with a particle size of 6-40mm; the prepared reducing agent The coking coal raw coal and the separated coking coal are mixed according to the mass percentage of 40%, and the coking coal mixing and briquetting machine is heated and dried to obtain dry coking coal pellets with a particle size of 45-55mm; % and nickel ore particles with a particle size of 6-40 mm are mixed through a mixing output device to obtain a mixture of laterite nickel ore particles with a moisture weight percentage <10%.

[0082] (2) Coal-based coking reduction roasting: Fill the coal-based coking reduction roasting test kiln with laterite nickel ore particle mixture; lay the stacked thickness in the preheating pool with a thickness of 200-300...

Embodiment 2

[0088] A lateritic nickel ore contains 0.92% nickel Ni and 49.84% iron Fe. Follow these steps:

[0089] (1) Raw material processing: Ni0.92%, Fe49.84% laterite nickel ore is granulated, dried, crushed and screened to obtain dry nickel ore particle materials with a particle size of 6-40mm; Percentage 40% mixing and pressing ball drying treatment to obtain dry coke balls with a particle size of 45-55mm; the dry coke balls with a particle size of 45-55mm are passed through the mixing output device according to the mass percentage of 30% and nickel ore particles with a particle size of 6-40mm Mix evenly to obtain laterite nickel ore granular mixture.

[0090] (2) Coal-based coking reduction roasting: The laterite nickel ore particle mixture is roasted in a coal-based coking roasting test kiln to obtain coking reduction roasting materials.

[0091](3) Coke Separation Circular Grinding Optimal Separation of Iron and Nickel: The coke reduction roasted material is separated by a sie...

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 sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation. The device comprises a raw material treatment flue gas waste heat utilization system, a coal-based coking reduction roasting system, a coke separation circulating grinding iron-nickel optimization separation system, a coal-based reduction roasting system, a reduced iron separation system, a high-nickel alloy concentration separation system and an ash and dust removal system. Coke is obtained through raw material treatment, coal-based coking reduction roasting and screening magnetic separation, a reduced iron product is obtained through circular grinding and iron-nickel optimization separation, coal-based reduction roasting and coking coal separation, and a high-nickel alloy product is finally left after non-magnetic heavy metal separation and low-nickel alloy separation. The method is suitable for treating laterite-nickel ore with Ni greater than 0.6% and Fe greater than 38%, coked reduced iron and nickel are optimally separated and upgraded respectively, the nickel grade of high-nickel alloy is greater than 11%, the grade of reduced iron is greater than 94%, and the nickel recovery rate is greater than 95%; and the problems of high energy consumption, difficult thermotechnical control and unstable product quality of an existing process for treating the low-grade laterite-nickel ore are solved.

Description

technical field [0001] The invention belongs to the technical field of direct reduction for energy-saving comprehensive utilization of mineral resources, and relates to a coal-based direct reduction roasting kiln and a mineral optimization method; in particular, it relates to a method and device for producing high-nickel alloy and reduced iron by magnetic separation of coal-based coking reduction roasting coke. Background technique [0002] Nickel has the characteristics of strong corrosion resistance and good heat resistance, and has been widely used in various fields such as stainless steel and special alloy steel; at present, 60% of nickel metal in the world is extracted from nickel sulfide ore, and its production technology is mature, but nickel sulfide Mineral resources are decreasing day by day. With the rapid development of the stainless steel industry, the demand for nickel is also increasing. The development and utilization of laterite nickel oxide ore, which account...

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
IPC IPC(8): C22B5/10C22B23/02C22B1/02C22B1/24C21B13/00F27D17/00
CPCC22B5/10C22B1/02C22B23/023C21B13/0066C22B1/2406F27D17/004
Inventor 张雷张凯玮张妍琪张辉张晋军张嘉妮梁军山梁志朴王永锋路宽陈小明
Owner 张雷
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