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

Method for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by rotary hearth furnace

A rotary hearth furnace and titanium placer technology, applied in the field of metallurgy, can solve problems such as waste of resources, backward equipment and production methods, and environmental pollution

Inactive Publication Date: 2009-10-28
KUNMING INST OF PRECIOUS METALS
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vast majority of titanium concentrate production enterprises are individual and private small enterprises. Due to the low level of mining and selection technology, backward equipment and production methods, and low management level, the utilization rate of resources is low, and resource advantages have not yet been transformed into economic advantages.
[0004] At present, the treatment of titanium placer in Yunnan is mainly to use the chlorination method as the main body and the matching hydrochloric acid leaching method of the by-product of the caustic soda plant to produce titanium concentrate. This method consumes a lot of acid and causes serious environmental pollution. , the treatment costs a lot, the production cycle is long, and the production cost is high; the production capacity of titanium dioxide in Yunnan Province is extremely low, and there are only one titanium dioxide factory in Wuding County and Fumin County in the whole province, both of which use the sulfuric acid method to produce anatase titanium dioxide product grades Low; the mineral nature of titanium placer in Yunnan Province is simple, which belongs to the ore that is easy to be separated. The rate is only about 50%, and the waste of resources is extremely serious, resulting in the current situation of rapid resource depletion; in metallurgical methods, ordinary ore-thermal electric furnaces are used to produce high-titanium slag, but due to the shortcomings of high energy consumption and large pollution in electric furnace smelting, electric furnace smelters under great pressure

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 for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by rotary hearth furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: 1. The chemical composition of titanium placer is as follows: TFe31.56~33.74%, TiO 2 45.47~46.83, SiO 2 2.31~2.58%, Al 2 o 3 2.36-2.64%, CaO1.24-1.40%, MgO2.37-2.55%.

[0010] 2. Process conditions: 10,000g of titanium placer is crushed to -120+200 mesh, accounting for 80%, adding 20% ​​of the original ore weight of carbon powder and adding 1% of the original ore weight of carboxymethyl cellulose binder and mixing with the titanium placer , use a spherical egg forming machine to make pellets with a diameter of 10~40mm, dry at 250°C for 4h, and use a rotary hearth furnace for rapid reduction, the temperature is controlled at 1200°C, and the time is 30min. After reduction, carry out coarse crushing (grain size is -120+200 mesh), then carry out wet ball milling, the pulp concentration is 55%, and the ball milling time is 1.5h. After ball milling, a 2500 Gauss magnetic separator is used for magnetic separation. Magnetic separation obtained The material is ...

Embodiment 2

[0011] Embodiment 2: 1. The chemical composition of vanadium-titanium iron ore concentrate is as follows: TFe32.01~34.82%, TiO 2 45.31~46.14, SiO 2 2.12~2.45%, Al 2 o 3 2.02-2.49%, CaO1.14-1.58%, MgO2.67-2.89%.

[0012] 2. Process conditions: 20,000g of titanium placer is crushed to -120+200 mesh, accounting for 80%, adding 22% of the original ore weight of carbon powder and adding 2% of the original ore weight of carboxymethyl cellulose binder and mixing with the titanium placer , use a spherical egg forming machine to make pellets with a diameter of 10-40mm, dry at 250°C for 4h, and use a rotary hearth furnace for rapid reduction, the temperature is controlled at 1250°C, and the time is 40min. After reduction, carry out coarse crushing (grain size is -120+200 mesh), then carry out wet ball milling, the pulp concentration is 65%, and the ball milling time is 1h. After ball milling, use a 3000 Gauss magnetic separator for magnetic separation, and the materials obtained by m...

Embodiment 3

[0013] Embodiment 3: 1. The chemical composition of vanadium-titanium iron ore concentrate is as follows: TFe36.54~38.01%, TiO 2 45.39~47.94%, SiO 2 2.71~2.99%, Al 2 o 3 2.64-2.97%, CaO1.54-1.77%, MgO2.64-2.98%.

[0014] 2. Process conditions: 50,000g of titanium placer is crushed to -120+200 mesh, accounting for 80%, adding 25% of the original ore weight of carbon powder and adding 3% of the original ore weight of carboxymethyl cellulose binder and mixing with the titanium placer , use a spherical egg forming machine to make pellets with a diameter of 10-40mm, dry at 250°C for 4h, and use a rotary hearth furnace for rapid reduction, the temperature is controlled at 1300°C, and the time is 50min. After reduction, carry out coarse crushing (grain size is -120+200 mesh), then carry out wet ball milling, the pulp concentration is 75%, and the ball milling time is 1.5h. After ball milling, a 3500 Gauss magnetic separator is used for magnetic separation. The material is re-sepa...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by a rotary hearth furnace, which comprises the following steps of: thinning titanium placer which is then added with a certain proportions of carbonaceous reducing agent, adhesive and concentrate ore and evenly mixing the materials; making pellets with the diameter of 10-40mm by a pellet forming machine; drying the pellets for 4-6 hours at the temperature of 200-500 DEG C and rapidly reducing the pellets in the rotary hearth furnace with the reducing temperature of 1200-1350 DEG C and the reducing time of 20-120min; crashing the pellets after being reduced; and then carrying out ball milling to the crashed pellets according to the grinding ore concentration of 50-80 percent, the ball milling time of 0.5-1.5h and the grinding ore fineness of 80-90 percent of -200 meshes; and after ball milling, carrying out magnetic separation and reelecting to obtain concentrate ore ferrous powder and tailing titanium slag, wherein the magnetic separation strength is 1000-4000 gausses. The invention adopts a method for rapidly reducing titanium placer pellets at the high temperature by the rotary hearth furnace, not only has even furnace temperature field, but also can quicken the reducing reaction speed, shorten the reducing time, improve the reducing efficiency and control the reducing temperature and atmosphere simultaneously.

Description

technical field [0001] The invention relates to a processing method for comprehensive utilization of Yunnan titanium placer, in particular to a method for extracting iron and titanium from Yunnan titanium placer, which belongs to the field of metallurgy. Background technique [0002] my country is a big country with titanium resources, and its reserves account for more than 60% of the world's reserves, but the vanadium-titanium magnetite symbiotic ore occupies a dominant position. Titanium ore is the third most important mineral in black resources in Yunnan Province except iron and manganese. It is mainly distributed in Luquan, Wuding, Fumin, Lufeng, Baoshan Banqiao, Menghai in Xishuangbanna and Shiping in southern Yunnan. , Jianshui, Huaning, Mengzi, Funing and other areas are mainly ilmenite with placer ores, the mineral combination is simple, and the separation performance is good. Titanium concentrate with low calcium and magnesium impurities is a high-quality raw mater...

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): C21B13/08B03B7/00B03B1/00C22B1/242B22F9/04
Inventor 汪云华范兴祥李柏榆李博杰
Owner KUNMING INST OF PRECIOUS METALS
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