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Sintering combustion improver and adding device and adding method thereof

A combustion aid and fuel technology, applied in the field of enhanced combustion aid and its adding device, can solve the problems affecting the basicity stability rate and grade stability rate of sinter, the fluctuation of chemical composition of sinter, and the poor strength of sinter, etc., to achieve effective Conducive to solid fuel, improvement of metallurgical performance indicators, improvement of consolidation strength

Active Publication Date: 2012-04-11
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the FeO control of sinter is too low, and the index of sinter strength (ISO drum index and low-temperature reduction pulverization rate) is not good, which directly affects the quality of sinter; and the addition of dust and mud mixture will lead to fluctuations in the chemical composition of sinter , affecting the basicity stability rate and grade stability rate of sinter

Method used

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  • Sintering combustion improver and adding device and adding method thereof
  • Sintering combustion improver and adding device and adding method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Sintering combustion aid preparation. Its composition is mainly composed of elemental substances and inorganic compounds. The simple substance is rare earth element, the inorganic compound is potassium permanganate, boric acid, magnesium chloride, ferrous oxide, nitrate, manganese dioxide and quicklime, and the raw material is powder.

[0021] By weight percentage, extract 1.3% of rare earth, 22% of potassium permanganate, 10% of boric acid, 7% of magnesium chloride, 25% of ferrous oxide, 11% of nitrate, 15% of manganese dioxide and 8.7% of quicklime powder, after mixing Put it into a mixer and stir well to make the sintering combustion aid of the present invention.

[0022] The sintering combustion aid is added to the device for preparation. The sintering combustion aid adding device is composed of a mine tank 1, a disc feeder 2, a belt electronic scale 3, a water adding nozzle 4 and a feeding plate 5. A "V" shaped ore tank 1 with a large upper opening and a small l...

Embodiment 2

[0025] By weight percentage, extract 1.0% of rare earth, 25% of potassium permanganate, 8% of boric acid, 5% of magnesium chloride, 20% of ferrous oxide, 20% of nitrate, 11% of manganese dioxide and 10% of quicklime powder, after mixing Put it into a mixer and stir well to make the sintering combustion aid of the present invention.

[0026] The composition and preparation method of the sintering combustion aid adding device are the same as in Example 1, except that the angle between the receiving plate 5 and the horizontal plane is 60°.

[0027] The steps of adding the sintering combustion aid are the same as in Example 1, but the ratio of combustion aid to fuel is 0.6:100.

Embodiment 3

[0029] By weight percentage, extract 0.7% of rare earth, 27% of potassium permanganate, 6% of boric acid, 3% of magnesium chloride, 15% of ferrous oxide, 27.3% of nitrate, 8% of manganese dioxide and 13% of quicklime powder, after mixing Put it into a mixer and stir well to make the sintering combustion aid of the present invention.

[0030] The composition and preparation method of the sintering combustion aid adding device are as in Example 1, and the angle between the feeding plate 5 and the horizontal plane is 40°.

[0031] The steps of adding the combustion aid for sintering are as in Example 1, and the ratio of the combustion aid to fuel is 0.8:100.

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Abstract

The invention provides a sintering combustion improver and an adding device and adding method thereof. The combustion improver consists of rare earth, potassium permanganate, boric acid, magnesium chloride, ferrous oxide, nitrate, manganese dioxide and quick lime. The adding device consists of an ore tank, a disk feeder, a belt electronic scale, a water-adding nozzle and a material-collecting plate. The adding method comprises the following steps: adjusting the revolution of the disk feeder, controlling the discharging amount of the combustion improver and mixing the combustion improver and the water sprayed by the water-adding nozzle to dissolve in the fuel of a fuel conveyor. The sintering combustion improver has a certain catalytic combustion effect on the gasification combustion reaction of coal power. By adopting the sintering combustion improver, the consolidation strength of the sintered ore is improved, the melting point temperature of the mixed material is reduced, the yield of the sintered ore is increased, the rate of combustion is increased, the burning through point shifts forward and the dosage of solid fuel is reduced so that the fuel consumption can be reduced and the quality of the sintered ore can be improved.

Description

technical field [0001] The invention belongs to the field of chemical additives, and in particular relates to an enhanced combustion accelerant added to fuel during sintering batching process and its adding device and adding method. Background technique [0002] At present, the raw materials used in many sintering plants are rich ore powders imported from Australia, Brazil, South Africa and other countries, and their mineral composition is based on Fe 2 o 3 Hematite, which is mainly used in sintering, needs to consume a large amount of carbon for reduction, so a higher fuel ratio is required. According to theoretical calculations, for every 10% increase in the proportion of hematite in sintering raw materials, the consumption of solid fuel will increase by 0.6-0.8kg, resulting in a 3-4kg / ton higher consumption of solid fuel in sintering than without hematite, making sintering The unit consumption of solid fuel reaches 50kg / ton. Mine. And it has remained high. [0003] Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 孙俊波杨熙鹏尹冬松王立军赵岐汪立冬
Owner ANGANG STEEL CO LTD
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