Method for preparing pellet ores by adding ilmenite into high-chromium vanadium titano-magnetite

A technology of vanadium-titanium magnetite and ilmenite, which is applied in blast furnaces, furnace types, blast furnace details, etc., can solve the problems of long pelleting time, poor quality of green pellets, and low strength of cooked pellets, and achieve small water loss , short time and low roasting temperature

Inactive Publication Date: 2018-04-06
NORTHEASTERN UNIV
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Problems solved by technology

[0005] When using the existing technology to prepare Panxi Hongge high-chromium vanadium-titanium magnetite pellets mixed with ilmenite, there are poor green pellet quality, long pelleting time, low cooked pellet strength, and lower metallurgical properties.
Therefore, it is more technically difficult to produce pellets with high-chromium vanadium-titanium magnetite and ilmenite

Method used

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  • Method for preparing pellet ores by adding ilmenite into high-chromium vanadium titano-magnetite

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for preparing pellets by adding ilmenite to high chromium type vanadium-titanium magnetite, such as figure 1 As shown, the method includes:

[0046] 1. Raw material drying

[0047] Dry high-chromium vanadium-titanium magnetite, ilmenite and bentonite in a drying oven at a drying temperature of 104-108°C and a drying time of 3-4.5 hours to make high-chromium vanadium-titanium magnetite and titanium The moisture content of iron ore is less than or equal to 1.5%.

[0048] It has been tested that the moisture content of high-chromium vanadium-titanium magnetite and ilmenite powder is in the range of 1.2% to 1.5%, which is the crystal water content, and that which exceeds this range is free water; in order to avoid free water from affecting the dry mixing effect, such as bentonite absorption The moisture in the high-chromium vanadium-titanium magnetite will agglomerate together and reduce the mixing effect with the high-chromium vanadium-titanium magnetite; at the...

Embodiment 2

[0072] A kind of high chromium type vanadium-titanium magnetite is mixed with the method for adding ilmenite to prepare pellets, the present embodiment is on the basis of embodiment 1, and concrete operation steps are as follows:

[0073] 1. Raw material drying

[0074] Get 4.5kg high-chromium type vanadium-titanium magnetite, 0.5kg ilmenite, and bentonite is 1% of the high-chromium type vanadium-titanium magnetite and ilmenite gross weight, and it is dried in a drying box. The temperature is 105°C, and the drying time is 4 hours. After drying, the water content of high-chromium vanadium-titanium magnetite is 1.2%, and that of ilmenite is 1.4%. Among them, the particle size distribution of high-chromium vanadium-titanium magnetite and ilmenite was measured by wet sieving method. Among the high-chromium vanadium-titanium magnetite, the proportion of particle size less than 75 μm was 72%; the particle size of ilmenite was less than The proportion of 75μm is 92%.

[0075] 2. Mi...

Embodiment 3

[0090] This embodiment is on the basis of embodiment 1, concrete operation is as follows:

[0091] 1. Raw material drying

[0092] Get 4.4kg high-chromium type vanadium-titanium magnetite, 0.6kg ilmenite and calcium-based bentonite account for 1.2% of the high-chromium type vanadium-titanium magnetite weight, these three kinds of raw materials are carried out drying process in drying box, drying temperature The temperature is 106°C, and the drying time is 3.4 hours. After drying, the water content of high-chromium vanadium titanomagnetite and ilmenite is 1.25% and 1.3%. Among them, the particle size distribution of high-chromium vanadium-titanium magnetite and ilmenite was measured by wet sieving method. Among the high-chromium vanadium-titanium magnetite, the proportion of particle size less than 75 μm was 72%; the particle size of ilmenite was less than The proportion of 75μm is 82%.

[0093] 2. Mixing stage

[0094] The hydrogen-based bentonite was added to the high-chro...

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Abstract

The invention relates to a method for preparing pellet ores by adding ilmenite into high-chromium vanadium titano-magnetite. The method comprises the following steps that 1, the high-chromium vanadiumtitano-magnetite, the ilmenite and bentonite raw materials are dried; 2, material mixing is carried out; 3, pelletizing is carried out; 4, pellet drying is carried out; and 5, roasting is carried outto obtain the pellet ores. According to the method, the Panxi Hong Ge high-chromium vanadium titano-magnetite and the ilmenite are used as raw materials, so that the pellet ores conforming to a blastfurnace entering quality standard is prepared, characteristics of the Hong Ge high-chromium vanadium titano-magnetite and the ilmenite are fully exerted, the obtained pellet ores have good air permeability in a soft melting and dripping zone, the performance of the molten drops is good, meanwhile, the recovery rate of Fe and Ti is relatively high, and the prepared pellet ores can be used as raw materials for producing titanium-rich materials and chromium-containing raw iron.

Description

technical field [0001] The invention belongs to the production technology of ironmaking raw materials, and in particular relates to a method for preparing pellets by adding ilmenite to high-chromium vanadium-titanium magnetite. Background technique [0002] Sichuan Panzhihua Hongge Mine is a reserve resource of inland iron and steel. It is a high-chromium and high-titanium vanadium-titanium magnetite with reserves of 3.55 billion tons. Due to its symbiosis of more than ten kinds of available elements, especially iron, titanium, vanadium, chromium, etc., and the rich titanium resources can be used for the production of titanium slag, sponge titanium, artificial rutile, titanium white, titanium alloy, titanium metal and other titanium materials Provide basic raw materials. Titanium is widely used in aviation, aerospace, military industry, metallurgy, metallurgy, medical treatment, machinery and other fields. [0003] Titanium resources in China are mainly distributed in vana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/02C21B5/00C22B34/12
CPCC22B1/243C21B5/00C22B1/02C22B1/2406C22B34/12
Inventor 薛向欣汤卫东杨松陶杨合姜涛
Owner NORTHEASTERN UNIV
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