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Preparation of all-sefstromite concentrate pellet ore

A technology of vanadium-titanium iron concentrate and pellets, which is applied in the field of blast furnace smelting, can solve problems such as rising prices, high roasting temperature, and rising ironmaking costs, and achieve the goals of reducing ironmaking costs, high compressive strength, and increasing production Effect

Inactive Publication Date: 2008-11-12
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the pellets used in blast furnace smelting are only roasted using all-vanadium-titanium-iron concentrate as raw material, there are technical limitations such as high roasting temperature and long roasting time, and no large-scale industrial production has been seen so far.
[0003] The pellets currently used in the blast furnace smelting of vanadium-titanium magnetite are all-vanadium-titanium-iron concentrate and different proportions of ordinary iron concentrate and then roasted. The configuration ratio is usually 70% of all-vanadium-titanium-iron concentrate plus 30% Ordinary iron concentrate powder, such pellets are widely used due to the simple roasting process, but with the rise in the price of domestic ordinary iron concentrate powder and imported concentrate powder, the cost of ironmaking has greatly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The preparation of embodiment 1 all-vanadium ilmenite concentrate pellets

[0009] Put 10kg of all-vanadium-titanium ferroconcentrate and 0.15kg of bentonite into a small electric mixer for mixing. After mixing, put them into a small horizontal ball mill for internal moistening. For Φ800×165mm (side height), speed 23r / min, inclination angle 46°) pellets, electric heating box type blast drying oven drying, wind speed 1.0m / s, drying initial temperature 200 ℃, heating rate 3 ℃ / min, heating To 450 ℃, constant temperature 4min. The dried pellets are preheated in a muffle furnace at 850°C for 15 minutes and then roasted in an air-circulating tube furnace for 20 minutes at a roasting temperature of 1200°C. After roasting, the all-vanadium-titanium-iron concentrate pellets of the present invention are obtained mine.

[0010] The all-vanadium ilmenite concentrate pellets contain TiO 2 12.49%, V 2 o 5 0.648%, the compressive strength of pellets is 2763N / piece, it can be di...

Embodiment 2

[0011] The preparation of embodiment 2 all-vanadium ilmenite concentrate pellets

[0012] Put 10kg of all-vanadium-titanium ferroconcentrate and 0.20kg of bentonite into a small electric mixer for mixing. After mixing, put them into a small horizontal ball mill for internal moistening. For Φ800×165mm (side height), speed 23r / min, inclination angle 46°) pellets, electric heating box type blast drying oven drying, wind speed 1.0m / s, drying initial temperature 200 ℃, heating rate 3 ℃ / min, heating to 450°C, keep the temperature constant for 5 minutes, preheat the dried pellets in a muffle furnace at 900°C for 12 minutes, that is, roast them in an air-circulating tube furnace for 20 minutes, and the roasting temperature is 1230°C. After roasting, the pellets of the present invention are obtained. All-vanadium-titanium iron concentrate pellets.

[0013] The all-vanadium ilmenite concentrate pellets contain TiO 2 12.27%, V 2 o 5 0.637%, pellet compressive strength 3197N / piece, ...

Embodiment 3

[0014] The preparation of embodiment 3 all-vanadium ilmenite concentrate pellets

[0015] Put 10kg of all-vanadium-titanium ferroconcentrate and 0.25kg of bentonite into a small electric mixer for mixing. After mixing, put them into a small horizontal ball mill for internal moistening. For Φ800×165mm (side height), speed 23r / min, inclination angle 46°) to make pellets, electric heating box type blast drying oven drying, wind speed 1.0m / s, drying initial temperature 200 ℃, heating rate 3 ℃ / min, heating to 450°C, constant temperature for 3 minutes, preheat the dried pellets in a muffle furnace at 950°C for 10 minutes, and then roast them in an air-circulating tube furnace for 20 minutes at a roasting temperature of 1250°C. Invented all-vanadium-titanium-iron concentrate pellets.

[0016] The all-vanadium ilmenite concentrate pellets contain TiO 2 12.16%, V 2 o 5 0.629%, the compressive strength of pellets is 3610N / piece, it can be directly used in blast furnace smelting, t...

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Abstract

The invention relates to a method for preparing all vanadium titanium iron ore concentrate pellet ore. The preparation method comprises the following steps that: the all vanadium titanium iron ore concentrate is added with 1.5 to 2.5 percent bentonite, evenly mixed, grinded, pelletized, dried, oxidized and roasted, thereby preparing the all vanadium titanium iron ore concentrate pellet ore; when a pellet is preheated, the temperature is between 800 and 1000 DEG C, and the time is between 10 and 15 minutes; when the pellet is roasted, the temperature is between 1200 and 1250 DEG C, and the roasting time is between 15 and 25 minutes. The all vanadium titanium iron ore concentrate pellet ore prepared by the invention comprises 10 to 14 percent of TiO2 and 0.4 to 0.7 percent of V2O5 and has the pressive strength reaching 2400 to 3800 N / each, can meet the smelting need of a large-scale blastfurnace; and the all vanadium titanium iron ore concentrate has low roasting temperature and is easy to realize industrialized production.

Description

technical field [0001] The invention relates to a method for preparing pellets for blast furnace smelting, in particular to a method for preparing pellets for blast furnace smelting by using all-vanadium ilmenite concentrate as a raw material, and belongs to the field of blast furnace smelting. Background technique [0002] my country's total vanadium-titanium concentrate reserves are over 10 billion tons, especially the Panzhihua region's vanadium and titanium reserves account for 1 / 3 and 1 / 5 of the world's vanadium resources, accounting for 50% and 90% of the country's vanadium resources. However, if the pellets used in blast furnace smelting are roasted only with all-vanadium-titanium-iron concentrate as raw material, there are technical limitations such as high roasting temperature and long roasting time, and no large-scale industrial production has been seen so far. [0003] The pellets currently used in the blast furnace smelting of vanadium-titanium magnetite are all-...

Claims

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Application Information

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IPC IPC(8): C22B1/14
Inventor 蒋胜何群文永才刘隆全
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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