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System and method for treating high carbon ferrochromium slag

A high-carbon ferrochromium and slag technology is applied in the system field of processing high-carbon ferrochromium slag, which can solve the problems of ferrochromium slag to be improved, environmental pollution, occupation of land resources, etc., and achieves resource utilization, energy saving and consumption reduction. , the effect of simple production process

Pending Publication Date: 2018-05-22
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the waste residue accumulated in our country is basically pulled to the storage yard after simple treatment, which not only occupies land resources, but also easily causes environmental pollution. Therefore, the problem of waste residue disposal is imminent. Research on Comprehensive Utilization of Value
[0003] However, the existing means of dealing with ferrochrome slag still needs to be improved

Method used

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  • System and method for treating high carbon ferrochromium slag
  • System and method for treating high carbon ferrochromium slag
  • System and method for treating high carbon ferrochromium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The molten high-carbon ferrochromium slag and the conditioning agent are supplied to the mixing device at a mass ratio of 100:60, and mixed and tempered at 1400°C for 30 minutes to obtain a mixed slag, wherein the conditioning agent is SiO 2 96% silica;

[0068] The mixed slag is supplied to the granulation device for granulation treatment so as to obtain pellets, wherein the granulation device includes a rotating processing pipe and a rotating cylinder, the rotating speed of the rotating discharge pipe is 15r / min, the rotating speed of the rotating cylinder is 5r / min, and the rotating The angle between the cylinder and the horizontal plane is 8 degrees, and the temperature of the pellets obtained by granulation is 1200°C;

[0069] The pellets are supplied to the annular heating furnace of the temperature adjustment device for temperature adjustment treatment, and the time for the annular heating furnace to rotate one circle is 70 minutes, so as to obtain the pellets af...

Embodiment 2

[0072] The molten high-carbon ferrochromium slag and the conditioning agent are supplied to the mixing device according to the mass ratio of 100:100, and the mixing and conditioning treatment is carried out at 1600 ° C for 20 minutes to obtain the mixed slag, wherein the conditioning agent is SiO 2 96% silica;

[0073] The mixed slag is supplied to the granulation device for granulation treatment so as to obtain pellets, wherein the granulation device includes a rotating processing pipe and a rotating cylinder, the rotating speed of the rotating discharge pipe is 30r / min, the rotating speed of the rotating cylinder is 10r / min, and the rotating The angle between the cylinder and the horizontal plane is 5 degrees, and the temperature of the pellets obtained by granulation is 1280°C;

[0074] The pellets are supplied to the annular heating furnace of the temperature adjustment device for temperature adjustment treatment, and the time for the annular heating furnace to rotate one ...

Embodiment 3

[0077] The molten high-carbon ferrochrome slag and the conditioning agent are supplied to the mixing device at a mass ratio of 100:140, and mixed and tempered at 1750°C for 10 minutes to obtain a mixed slag, wherein the conditioning agent is SiO 2 97% silica;

[0078] The mixed slag is supplied to the granulation device for granulation treatment so as to obtain pellets, wherein the granulation device includes a rotating processing pipe and a rotating cylinder, the rotating speed of the rotating discharge pipe is 45r / min, the rotating speed of the rotating cylinder is 14r / min, and the rotating The angle between the cylinder and the horizontal plane is 3 degrees, and the temperature of the pellets obtained by granulation is 1350°C;

[0079] The pellets are supplied to the annular heating furnace of the temperature adjustment device for temperature adjustment treatment, and the time for the annular heating furnace to rotate one circle is 200 minutes, so as to obtain the pellets a...

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Abstract

The invention discloses a system and a method for treating high carbon ferrochromium slag. The system comprises a mixing device, a granulizing device, a temperature adjusting device and a screening device, wherein a molten ferrochromium slag inlet, a hardening and tempering agent inlet and a mixed molten slag outlet are formed in the mixing device; a mixed molten slag inlet and a spherical outletare formed in the granulizing device; the temperature adjusting device is an annular heating furnace; the annular heating furnace is provided with a rotational annular furnace disc; a high temperaturezone, an intermediate temperate zone and a cooling zone are sequentially arranged in the annular furnace disc in a rotation direction; baffle walls are arranged among the high temperature zone, the intermediate temperate zone and the cooling zone; a sphere inlet is formed in the high temperature zone; a temperature adjusted sphere outlet is formed in the cooling zone; a temperature adjusted sphere inlet and a ceramsite product outlet are formed in the screening device. By adopting the system, ceramsite is prepared from molten high carbon ferrochromium slag as a raw material, the sensible heatof the high carbon ferrochromium slag is sufficiently utilized, the process procedures are short, remarkable energy saving and consumption reduction effects are achieved, and recycling and harmless utilization of the high carbon ferrochromium slag are achieved.

Description

technical field [0001] The invention relates to the field of metallurgical solid waste utilization, in particular, the invention relates to a system and method for processing high-carbon ferrochrome slag. Background technique [0002] China has been the world's largest producer and consumer of stainless steel for many years in a row. It needs to produce a large amount of ferrochrome alloy every year. In 2016, the output of high-carbon ferrochrome in China was 4.2312 million tons, and every 1 ton of ferrochrome produced had 1-1.2 tons of waste residue Produced, that is, about 4.23-5.08 million tons of new ferrochrome slag, the ferrochrome slag is hard, has a certain strength and hardness, and the main component is SiO 2 、Al 2 o 3 , MgO and a small amount of chromium and iron oxides in the form of chromite. The main mineral phases are forsterite, magnesium aluminum spinel, enstatite and a small amount of incompletely reacted chromite. At present, the waste residue accumulat...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B5/06
CPCC04B38/009C04B5/06
Inventor 徐刚陈佩仙闫方兴任中山郑常乐李永卿曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST