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

A kind of vanadium-titanium sea placer carbon-containing pellets and preparation method thereof

The technology of sea sand ore and carbon pellets is applied in the field of metallurgy, which can solve the problems of no effective recovery method of titanium, high cost, low sea sand dosage, etc., so as to improve the utilization rate of sea sand, improve the compressive strength, prepare simple craftsmanship

Active Publication Date: 2020-07-17
NORTHEASTERN UNIV LIAONING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blast furnace method is to add vanadium-titanium sea sand ore to ordinary iron ore for sintering and then enter the blast furnace for smelting. During the smelting process, most of the vanadium is selectively reduced into molten iron, while titanium enters the slag; the disadvantage of the blast furnace method is that sea sand is mixed into Low amount and high blast furnace temperature cause TiO 2 Reduction increases the difficulty of smelting, and there is no effective recovery method for titanium in slag, etc.
The non-blast furnace method is a smelting method in which vanadium-titanium sea sand ore is pelletized and roasted, then pre-reduced, and then smelted in an electric furnace to generate vanadium-containing molten iron and slag. The disadvantages include low titanium recovery rate, complicated smelting process and high cost.

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 vanadium-titanium sea placer carbon-containing pellets and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The present invention also provides a method for preparing vanadium-titanium sea sand ore carbon-containing pellets, which specifically includes the following steps:

[0034] Step S1, drying vanadium-titanium sea placer and ordinary vanadium-titanium ore at 110-130°C for 2-4 hours, drying bituminous coal and lean coal at 85-95°C for 2-4 hours, and then drying the vanadium-titanium sea placer Sample grinding treatment with common vanadium-titanium ore; after that, uniformly mix vanadium-titanium sea-sand ore, common vanadium-titanium ore, bituminous coal and lean coal according to the component distribution ratio of vanadium-titanium sea-sand ore carbon-containing pellets to obtain a mixed material.

[0035] Step S2, heating the mixed material to 250-350° C., and then pressing to obtain a hot compact. When the hot-pressing temperature is 250-350°C, the compressive strength of the vanadium-titanium sea sand ore hot-pressed carbon-containing pellets can reach more than 300...

Embodiment 1

[0044] Step S1, drying the vanadium-titanium sea placer and ordinary vanadium-titanium ore at 120°C for 2 hours, drying the bituminous coal and lean coal at 90°C for 2 hours, and then grinding the vanadium-titanium sea placer and ordinary vanadium-titanium ore treatment, so that the particle size of vanadium-titanium sea placer is less than 200 mesh, and the particle size of ordinary vanadium-titanium ore is less than 150 mesh; after that, uniformly mix 10% vanadium-titanium sea-sand ore, 60% ordinary vanadium-titanium ore, 25% bituminous coal and 5% lean coal to obtain mixed materials.

[0045] Step S2, heating the mixed material to 300° C., and then pressing to obtain a hot briquette.

[0046] Step S3, heat-treating the hot-pressed block, the heat-treatment temperature is 500° C., and the heat-treatment time is 4 hours, to obtain hot-pressed carbon-containing pellets of vanadium-titanium sea placer. According to GB / T 14201-93, the compressive strength of the vanadium-titani...

Embodiment 2

[0048] Step S1, drying the vanadium-titanium sea placer and ordinary vanadium-titanium ore at 120°C for 2 hours, drying the bituminous coal and lean coal at 90°C for 2 hours, and then grinding the vanadium-titanium sea placer and ordinary vanadium-titanium ore treatment, so that the particle size of vanadium-titanium sea placer is less than 200 mesh, and the particle size of ordinary vanadium-titanium ore is less than 150 mesh; after that, uniformly mix 10% vanadium-titanium sea-sand ore, 60% ordinary vanadium-titanium ore, 25% bituminous coal and 5% lean coal to obtain mixed materials.

[0049] Step S2, heating the mixed material to 250° C., and then pressing to obtain a hot compact.

[0050] Step S3, heat-treating the hot-pressed block, the heat-treatment temperature is 500° C., and the heat-treatment time is 4 hours, to obtain hot-pressed carbon-containing pellets of vanadium-titanium sea placer. According to GB / T 14201-93, the compressive strength of the vanadium-titanium...

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

A kind of vanadium-titanium sea sand ore carbon-containing pellets, including by weight fraction: 22% to 28% bituminous coal, 4% to 7% lean coal, 0% to 62.5% of ordinary vanadium-titanium ore and 10% to 67.5% % of vanadium-titanium sea sand ore, the vanadium-titanium sea sand ore carbon-containing pellets are hot-pressed carbon-containing pellets; the compressive strength is above 3000N, and a high amount of sea sand ore is achieved, significantly improving the utilization of sea sand ore Rate. A method for preparing vanadium-titanium sea sand ore is also provided, including: S1, sequentially drying and grinding vanadium-titanium sea sand ore, ordinary vanadium-titanium ore, bituminous coal and lean coal, and according to the carbon content of the above-mentioned vanadium-titanium sea sand ore According to the component ratio of the pellets, uniformly mix the vanadium-titanium sea sand ore, ordinary vanadium-titanium ore, bituminous coal and lean coal to obtain a mixed material; S2, heat the mixed material to the hot pressing temperature, and then press it to obtain hot briquettes; S3, The hot-pressed blocks are heat-treated to obtain hot-pressed carbonaceous pellets of vanadium-titanium sea sand ore. The process is simple and low cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a vanadium-titanium sea placer carbon-containing pellet and a preparation method thereof. Background technique [0002] Vanadium-titanium sea placer is a kind of secondary enriched iron placer ore formed by the action of rivers, waves, tides and ocean currents in the coastal area. Its main useful mineral components are vanadium, titanium, iron, etc. After beneficiation, it can be Iron concentrate containing vanadium and titanium is obtained. Vanadium-titanium sea placer is currently recognized as a difficult-to-select and difficult-to-smelt iron ore resource in the world. Vanadium-titanium sea placer has regular particle shape, smooth and dense surface, coarser particle size, higher hardness and melting point, and poorer ball milling performance and pelletizing performance than other iron ores. The vanadium-titanium sea placer contains a small amount of ilmenite ...

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): C22B1/245C22B1/16
CPCC22B1/16C22B1/2406C22B1/2413C22B1/245
Inventor 储满生赵伟张泽栋柳政根王宏涛鲍继伟唐珏韩冬
Owner NORTHEASTERN UNIV LIAONING