System and method to treat ferrochrome slag

A ferrochrome slag and homogenization treatment technology, which is applied in applications, household utensils, clay products, etc., can solve the problems of land occupation, environmental pollution, and waiting for improvement, so as to reduce dust pollution, reduce production costs, and improve physical and chemical properties. stable effect

Pending Publication Date: 2018-04-27
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ferrochrome is the most important raw material for producing stainless steel. China needs to produce a large amount of ferrochrome alloy for stainless steel smelting every year. For every 1 ton of ferrochrome produced, 1-1.2t of ferrochrome slag is produced. The main component of ferrochrome slag 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 accumulated in my country Basically, after simple treatment, they are pulled to the yard for stacking, which not only occupies land resources, but also easily causes environmental pollution. Therefore, the problem of waste disposal is imminent. It is necessary to conduct research on its reduction, resource utilization and high-value comprehensive utilization.
[0003] However, the existing means of dealing with ferrochrome slag still need further improvement.

Method used

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  • System and method to treat ferrochrome slag
  • System and method to treat ferrochrome slag
  • System and method to treat ferrochrome slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 1. Import the ferrochrome slag into the intermediate holding electric furnace to keep the slag in a molten state with good fluidity. The slag temperature is 1600-1650°C. Control the slag outlet flow valve of the intermediate holding electric furnace so that the slag flows into the high-temperature grain at a certain speed. in the carousel.

[0075] 2. Driven by the motor, the turntable rotates at a high speed, the linear speed is 2m / s, and the slag granulation temperature is 1200-1400°C. The slag passes through the upper edge of the turntable in a drop shape Shake off the turntable.

[0076] 3. Drop-shaped slag is cooled to 1200-1400°C and solidified on the surface in contact with cold air during the falling process, and the cold air is blown in from the ventilation holes of the porous receiving plate on the side wall of the high-temperature granulator.

[0077] 4. The initially cooled ceramsite is sent to the high-temperature consolidation chamber of the consolidation...

Embodiment 2

[0082] 1. Import the ferrochrome slag into the intermediate holding electric furnace to keep the slag in a molten state with good fluidity. The slag temperature is 1700-1750°C. Control the slag outlet flow valve of the intermediate holding electric furnace to make the slag flow into the high-temperature grain at a certain speed. in the carousel.

[0083] 2. Driven by the motor, the turntable rotates at a high speed, the linear speed is 6m / s, and the slag granulation temperature is 1200-1400°C. The slag passes through the upper edge of the turntable in a drop shape Shake off the turntable.

[0084] 3. Drop-shaped slag is cooled to 1200-1400°C and solidified on the surface in contact with cold air during the falling process, and the cold air is blown in from the ventilation holes of the porous receiving plate on the side wall of the high-temperature granulator.

[0085] 4. The initially cooled ceramsite is sent to the high-temperature consolidation chamber of the consolidation ...

Embodiment 3

[0090] 1. Import the ferrochrome slag into the intermediate holding electric furnace to keep the slag in a molten state with good fluidity. The slag temperature is 1650-1700°C. Control the slag outlet flow valve of the intermediate holding electric furnace so that the slag flows into the high-temperature grain at a certain speed. in the carousel.

[0091]2. Driven by the motor, the turntable rotates at a high speed, the linear speed is 8m / s, and the slag granulation temperature is 1200-1400°C. The slag passes through the upper edge of the turntable in a drop shape Shake off the turntable.

[0092] 3. Drop-shaped slag is cooled to 1200-1400°C and solidified on the surface in contact with cold air during the falling process, and the cold air is blown in from the ventilation holes of the porous receiving plate on the side wall of the high-temperature granulator.

[0093] 4. The initially cooled ceramsite is sent to the high-temperature consolidation chamber of the consolidation ...

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Abstract

The invention discloses a system and method to treat ferrochrome slag. The system comprises: a granulating device having a molten ferrochrome slag inlet and a first sphere outlet; a consolidating device having a first sphere inlet and a second sphere outlet, wherein the first sphere inlet is connected with the first sphere outlet; a homogenizing device having a second sphere inlet and a third sphere outlet, wherein the second sphere inlet is connected with the second sphere outlet; a screening device having a third sphere inlet and a ceramsite product outlet, wherein the third sphere inlet isconnected with the third sphere outlet. The system prepares ceramsite from molten ferrochrome slag, sensible heat of the ferrochrome slag can be made full use, energy conservation and consumption reduction are significant, and resourceful harmless utilization of ferrochrome slag is achieved.

Description

technical field [0001] The invention relates to the field of metallurgical solid waste utilization, in particular, the invention relates to a systematic method for treating ferrochrome slag. Background technique [0002] Ferrochrome is the most important raw material for producing stainless steel. China needs to produce a large amount of ferrochrome alloy for stainless steel smelting every year. For every 1 ton of ferrochrome produced, 1-1.2t of ferrochrome slag is produced. The main component of ferrochrome slag 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 accumulated in my country Basically, after simple treatment, they are pulled to the yard for stacking, which not only occupies land resources, but also easily causes environmental pollution. Therefore, the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B38/00
CPCC04B33/138C04B38/009Y02P40/60
Inventor 闫方兴任中山徐刚陈佩仙李永卿郑常乐吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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