Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for producing iron finished ore powder utilizing low grade siderite

A technology for iron ore concentrate powder and siderite, which is applied in the field of producing iron ore concentrate powder, can solve the problems that cannot be directly quoted, the process route and process conditions are quite different, and the technology and production cost remain in the laboratory or semi-industrial test stage. and other problems to achieve the effect of improving quality and reducing production costs

Inactive Publication Date: 2007-07-11
周云富
View PDF0 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large differences in the composition of raw ores in various regions, the process routes and process conditions in various regions are also quite different, so it cannot be directly quoted.
The enrichment of raw ore by roasting-magnetic separation process has broad prospects, but most of them stay in the laboratory or semi-industrial test stage due to the limitation of technology and production cost, and there are few reports on industrial production using siderite completely

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

[0013] Example 1: Siderite Mine in Fengying Township, Panzhihua, Sichuan 3 It is the main iron-containing component, and its lean ore TFe=27~30%, SiO 2 =20~25%, due to low iron and high silicon, it cannot be sintered and directly used in blast furnace. The limonite on the surface of the mine has withered after more than 20 years of development, and its lower layer is siderite with a reserve of 18.1559 million tons (of which 17.8371 million tons is lean ore). In order to make full use of local lean iron ore and low-quality coal resources to produce iron concentrate powder, the process steps are as follows:

[0014] (1) Crushing-screening: use low-grade siderite as raw material, and obtain roasted lump ore with a particle size of 30mm after crushing-screening;

[0015] (2) Rotary kiln roasting: siderite is FeCO 3 , the general beneficiation method is difficult to select. Can be roasted first to remove CO 2 And improve the grade. We carry out targeted modification of sideri...

Embodiment 2

[0027] Embodiment 2: Sichuan Panzhihua Fengying Township Siderite Mine produces iron ore concentrate powder, and its processing steps are as follows:

[0028] (1) Crushing-screening: use low-grade siderite as raw material, and obtain roasted lump ore with a particle size of 40mm after crushing-screening;

[0029] (2) Rotary kiln roasting: use coal gas as fuel, carry out magnetized roasting at 520°C, start feeding to discharging, roasting time is about 50min, so that FeCO in siderite 3 converted to Fe 3 o 4 , Other carbonates also decompose to a certain extent. By controlling the roasting atmosphere, the decomposition of siderite mainly produces Fe 3 o 4 , CO 2 And CO, the reaction product CO can also reduce the associated hematite and limonite;

[0030] (3) Cooling: The temperature of the furnace charge is still 400°C when it comes out of the furnace, and it is slowly cooled to below 300°C with isolated air. The heat energy is used to preheat the air for the gasifier and ...

Embodiment 3

[0037] Embodiment 3: Sichuan Panzhihua Fengying Township Siderite Mine produces iron ore concentrate powder, and its processing steps are as follows:

[0038] (1) Crushing-screening: use low-grade siderite as raw material, and obtain roasted lump ore with a particle size of 10mm after crushing-screening;

[0039] (2) Rotary kiln roasting: use coal gas as fuel, carry out magnetized roasting in the range of 600°C, from feeding to discharging, the roasting time is about 55min, so that the FeCO in siderite 3 converted to Fe 3 o 4 , Other carbonates also decompose to a certain extent. By controlling the roasting atmosphere, the decomposition of siderite mainly produces Fe 3 o 4 , CO 2 And CO, the reaction product CO can also reduce the associated hematite and limonite;

[0040] (3) Cooling: The temperature of the furnace charge is still 500°C when it comes out of the furnace, and it is slowly cooled to below 300°C with isolated air. This heat energy is used to preheat the air ...

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 manufacturing technique of iron concentrate powder from low-grade siderite, which comprises the following steps: adopting low-grade siderite as raw material; breaking; sieving; obtaining the sintered ore with grain size at 10-40mm; adopting flue gas as fuel; proceeding magnetic sintering; transmitting FeCO3 in the siderite into Fe3O4; cooling the material below 300 deg. c due to isolating air; quenching; balling the sintered ore; proceeding magnetic sieve, stripping magnet-stripping and magnetic sieve with magnetic strength at 800-1000 oerst; obtaining the product.

Description

[0001] Field [0002] The invention relates to a process for producing iron concentrate powder, in particular to a process for producing iron concentrate powder by using low-grade siderite. Background technique [0003] With the rapid development of the domestic iron and steel industry, domestic high-grade, easy-to-process iron ore resources continue to decrease, forcing major iron and steel companies to import a large amount of iron ore. Therefore, rational development and utilization of various domestic lean iron ore resources, and research on new lean iron ore processing technologies to produce iron concentrates and fine ore that meet market requirements have once again become a hot spot in my country's iron and steel mining industry, and it is also a key point for the sustainable development of the iron and steel industry. only way. Siderite is based on FeCO 3 Low-grade iron ore as the main component is an iron ore resource second only to limonite, hematite and pyrite. my...

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): C22B1/00C22B1/14C22B1/02B03C1/02
Inventor 周云富
Owner 周云富
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com