Method for increasing yield of titanium-type agglomerate schreyerite

A vanadium-titanium sinter and high-titanium type technology, which is applied in the field of sinter preparation, can solve the problems of high return rate, insufficient low-temperature liquid phase, and large sintering cycle, and achieve the effect of increasing production and reducing processing costs

Inactive Publication Date: 2014-05-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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AI Technical Summary

Problems solved by technology

[0002] Panzhihua Iron and Steel's sintering raw materials are mainly Panzhihua high-titanium vanadium-titanium magnetite concentrate, but because Panzhihua high-titanium vanadium-titanium magnetite concentrate has low TFe content (TFe2 Accounting for about 3.3wt%, high titanium (TiO 2 12.7wt%), poor spheroidization and water absorption, high melting point substances, so it is not easy to sinter, and brittle perovskite (CaO TiO 2 ), insufficient low-temperature liquid phase, sintered ferrite has less low-temperature binder phase and its shape is different from ordinary sinter calcium ferrite, which leads to poor sinter strength, low yield, and high return rate. And the output is also low, seriously restricting the improvement of smelting intensity
In addition, the higher the ratio of vanadium-titanium magnetite, the greater the difficulty of sintering, resulting in a significant deterioration in the output and quality of high-titanium sintered ore. Usually, the sintering yield of high-titanium vanadium-titanium magnetite concentrate is 75-78%. %
[0003] Moreover, the finished ore base material used for sintering accounts for about 6-8wt% of the sinter output, so the sintering cycle is large, resulting in poor sintering technical indicators

Method used

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  • Method for increasing yield of titanium-type agglomerate schreyerite

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example 1

[0051] Production of acidic oxidation roasting pellets: mix Baima vanadium-titanium magnetite concentrate with a proportion of 98% and bentonite with a proportion of 2.0%, and add water to make a mixture, and control the moisture content in the mixture to 7%. Then pelletize the mixture for 5 minutes in a disc pelletizer with a diameter of 1000 mm and a rotating speed of 3 r / min to obtain pellets with a particle size of 10-16 mm. Put the pellets into the roasting furnace after standing in the air for 24 hours, raise the temperature from 20°C to 520°C at a rate of 10°C / min, take them out after roasting for 50min, and let them cool naturally for use.

[0052] The proportion of Baima vanadium-titanium magnetite concentrate is 62.5%, the proportion of domestic high-grade ordinary fine ore is 11.5%, the proportion of domestic low-grade ordinary fine ore is 5%, the proportion of active ash is 4.7%, and the proportion of limestone is 6.8%. , The ratio of coke powder is 5.0%, the ratio...

example 2

[0055] Production of acidic oxidation roasting pellets: mix Baima vanadium-titanium magnetite concentrate with a proportion of 98% and bentonite with a proportion of 2.0%, and add water to make a mixture, and control the moisture content in the mixture to 9%. Then pelletize the mixture for 5 minutes in a disc pelletizer with a diameter of 1000 mm and a rotating speed of 3 r / min to obtain pellets with a particle size of 10-16 mm. Put the pellets into the roasting furnace after standing in the air for 24 hours, raise the temperature from 20°C to 520°C at a rate of 10°C / min, take them out after roasting for 50min, and let them cool naturally for use.

[0056] The proportion of Baima vanadium-titanium magnetite concentrate is 61%, the proportion of domestic high-grade ordinary fine ore is 12%, the proportion of domestic low-grade ordinary fine ore is 5.4%, the proportion of active ash is 5.0%, and the proportion of limestone is 7.0%. , The ratio of coke powder is 5.2%, the ratio o...

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Abstract

The invention discloses a method for increasing yield of titanium-type agglomerate schreyerite. Weight percentage is taken as basis, and the method comprises the following steps: mixing high-titanium-type vanadium titanium magnet ore concentrate and a binding agent according to the ratio of 97-98% to 2-3%; forming balls with the diameter of 12-16 mm; calcining the balls at the temperature of 400-600 DEG C to obtain acid oxidized calcined balls; using all or part of the acid oxidized calcined balls as end product high-titanium-type agglomerate schreyerite which is used as a backing material; performing material distributing, ignition, and sintering. The method provided by the invention can effectively increase the yield of the titanium-type agglomerate schreyerite, reduce the processing cost, and facilitate yield increase and efficiency increase.

Description

technical field [0001] The invention belongs to the technical field of sinter preparation, and more specifically relates to a method for increasing the output of high-titanium vanadium-titanium sintered ore. Background technique [0002] Panzhihua Iron and Steel's sintering raw materials are mainly Panzhihua high-titanium vanadium-titanium magnetite concentrate, but because Panzhihua high-titanium vanadium-titanium magnetite concentrate has low TFe content (TFe<55wt%) and coarse particle size (≤0.074mm accounts for about 52wt%) , low silicon (SiO 2 Accounting for about 3.3wt%, high titanium (TiO 2 12.7wt%), poor spheroidization and water absorption, high melting point substances, so it is not easy to sinter, and brittle perovskite (CaO TiO 2 ), insufficient low-temperature liquid phase, sintered ferrite has less low-temperature binder phase and its shape is different from ordinary sinter calcium ferrite, which leads to poor sinter strength, low yield, and high return ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 饶家庭张义贤林文康王敦旭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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