Application of shaft furnace in baking full-vanadium ferrotitanium ore concentrate pellet ore

A vanadium-titanium-iron concentrate and pellet technology, which is applied in shaft furnaces, furnaces, furnace types, etc., can solve the problems of reduced FeO content and compressive strength, and has not been widely used, so as to increase the pelleting rate and meet the Subsequent process requirements and roasting needs, the effect of reducing costs

Inactive Publication Date: 2009-04-29
攀钢集团成都钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] All-vanadium-titanium iron concentrate pellets can only be fired in a tube furnace, but the main indicators of the finished product such as TFe, FeO content and compressive strength are greatly reduced compared with ordinary pellets, so the tube furnace The method of furnace roasting all-vanadium-titanium-iron concentrate pellets has not been widely used
[0004] At present, there is no method for roasting all-vanadium-titanium-iron concentrate pellets in a shaft furnace

Method used

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  • Application of shaft furnace in baking full-vanadium ferrotitanium ore concentrate pellet ore

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Experimental program
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Effect test

Embodiment 1

[0026] The raw materials (full vanadium ilmenite concentrate and bentonite in a ratio of 98.8:1.2) are automatically batched by an electronic belt scale, and then transported by a belt into a drum drying mixer for mixing and dehydration. After mixing and dehydration The moisture content of the mixture is 5%, and then sent to the moistening mill for moistening and grinding, so that the particle size of the raw material -200 mesh increases by about 10%, and then enters the disc pelletizing machine for pelletizing. The size of the disc pelletizing machine is Φ6000×700mm (side height), rotation speed 8r / min, inclination angle 46.5°, water addition method is to add water to the upper and lower parts of the pelletizing disc at the same time, and the amount of water added is 1-2% of the weight of raw materials.

[0027] After the green balls are screened by the sieving machine, the green balls with a diameter of 8-16mm are evenly distributed to the drying bed of the shaft furnace by t...

Embodiment 2

[0033] After the raw materials (full vanadium ilmenite concentrate and bentonite in the ratio of 98.8:1.2) are automatically batched by the electronic belt scale, they are transported by the belt into the drum drying mixer for mixing and dehydration. After mixing and dehydration The moisture content of the mixture is 5.2%, and then it is sent to the moistening mill for moistening and grinding, so that the particle size of the raw material -200 mesh increases by about 10%, and then enters the disc pelletizing machine for pelletizing. The size of the disc pelletizing machine is Φ6000×700mm (Side height), speed 8r / min, inclination angle 46.5°, the water addition system of the disc pelletizer is connected to a bypass system to connect to the sludge tank, and the converter sludge slurry is sent to the pelletizing disc by a pump, and pelletized in the disc Spray converter sludge slurry with 2 to 4% of raw material weight instead of water when making pellets.

[0034] After the green...

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Abstract

The invention relates to application of a shaft furnace to the roasting of full vanadium titanium iron ore concentrate pellet, which belongs to the technical field of the preparation method for the pellet. According to the method, the full vanadium titanium iron ore concentrate and 1.0 to 1.4 percent of bentonite are taken as raw materials which are used to prepare the full vanadium titanium iron ore concentrate pellet through even mixing, damp milling, pelletizing, drying and roasting, wherein the roasting temperature is 1,000 to 1,050 DEG C, and the roasting time is 30 to 60 minutes. The compressive strength of the full vanadium titanium iron ore concentrate pellet obtained by the method reaches 2,200N/piece. The pellet can be directly used for blast furnace smelting and also be used as a furnace protecting product during the blast furnace smelting of common ore.

Description

technical field [0001] The invention belongs to the technical field of pellet preparation methods, and in particular relates to the application of a shaft furnace in roasting all-vanadium-titanium-iron concentrate pellets. Background technique [0002] In recent years, the production of pellets is in a stage of rapid development, the competition for iron concentrate resources among iron and steel plants is becoming increasingly fierce, and the cost of blast furnace smelting is also increasing. my country's vanadium-titanium magnetite resources are quite rich, but because the vanadium-titanium iron ore concentrate contains high vanadium, titanium, FeO and other special components, it must be artificially agglomerated if it is to be smelted in a blast furnace. The system is used together with other iron ores to produce sinter for use in blast furnaces; the second is to enter the pellet system to produce pellets containing vanadium-containing ilmenite concentrate. Due to the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/214
Inventor 陈少军熊泽明卢永朱强范儒海秦舜
Owner 攀钢集团成都钢铁有限责任公司
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