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System and method for preparing porcelain balls from chromium iron slag

A technology for ferrochromium slag and ceramic balls, applied in the field of metallurgical solid waste utilization, can solve the problems of ferrochromium slag to be improved, environmental pollution, occupation of land resources, etc., so as to save the fine grinding process, improve the working environment, and reduce dust pollution. Effect

Pending Publication Date: 2018-04-10
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
[0004] However, the existing means of treating ferrochrome slag still need to be improved

Method used

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  • System and method for preparing porcelain balls from chromium iron slag
  • System and method for preparing porcelain balls from chromium iron slag
  • System and method for preparing porcelain balls from chromium iron slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1. Ferrochrome slag (Al 2 o 3 Content 40.0%, SiO 2 content 31.2%, MgO content 17.9%) into the middle holding electric furnace, with 30% Al 2 o 3 Alumina ceramic waste with a content of 91.3% keeps 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 heat preservation electric furnace to make the slag flow into the double-layer cylinder at a certain speed In the inner drum of the granulator.

[0073] 2. The inner drum rotates under the drive of the motor, and the slag is thrown away from the inner drum in a drop shape through the round hole on the drum under the combined force of centrifugal force, gravity, friction, etc., and the inner drum comes out. The diameter of the round hole on the arc surface of the material end is 5mm. During the falling process, the drop-shaped slag is in contact with the air to cool down to 1300-1400°C and solidifies on the surface, falls into the outer...

Embodiment 2

[0077] 1. Ferrochrome slag (Al 2 o 3 Content 23.3%, SiO 2 content 39.6%, MgO content 25.3%) into the middle holding electric furnace, with 45% Al2 o 3 A mixture of alumina ceramic ball waste and ceramic waste with a content of 84.6% in any proportion. 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 heat preservation electric furnace to make the slag flow into the inner drum of the double-layer cylindrical granulator at a certain speed.

[0078] 2. The inner drum rotates under the drive of the motor, and the slag is thrown away from the inner drum in a drop shape through the round hole on the drum under the combined force of centrifugal force, gravity, friction, etc., and the inner drum comes out. The diameter of the round hole on the arc surface of the material end is 6mm. During the falling process, the drop-shaped slag is in contact with the air to cool down to 1300-1400°C and...

Embodiment 3

[0082] 1. Ferrochrome slag (Al 2 o 3 Content 32.1%, SiO 2 content 22.6%, MgO content 25.2%) into the middle holding electric furnace, with 60% Al 2 o 3 The alumina castable waste with a content of 93.2% keeps the slag in a molten state with good fluidity. The slag temperature is 1750-1800°C. Control the slag outlet flow valve of the intermediate heat preservation electric furnace to make the slag flow into the double-layer circle at a certain speed. In the inner drum of the drum granulator.

[0083] 2. The inner drum rotates under the drive of the motor, and the slag is thrown away from the inner drum in a drop shape through the round hole on the drum under the combined force of centrifugal force, gravity, friction, etc., and the inner drum comes out. The diameter of the round hole on the arc surface of the material end is 8mm. During the falling process, the drop-shaped slag contacts with the air to cool down to 1200-1400°C and solidifies on the surface, falls into the o...

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Abstract

The invention discloses a system and a method for preparing porcelain balls from chromium iron slag. The system comprises a mixing device which has a molten chrome iron slag inlet, an alumina materialinlet and a mixed slag outlet; a granulation device which has a mixed slag inlet and a first pellet outlet, wherein the mixed slag inlet is connected with the mixed slag outlet; a consolidation device which has a first pellet inlet and a second pellet outlet, wherein the first pellet inlet is connected with the first pellet outlet; and a screening device which has a second pellet inlet and a porcelain ball product outlet, wherein the second pellet inlet is connected with the second pellet outlet. The system uses the molten chrome iron slag and a waste alumina material as raw materials to prepare the porcelain balls, can make full use of the sensible heat of the chrome iron slag, has significant energy-saving and consumption-reducing effect, and realizes the recycling and harmless utilization of the chromium iron slag and the waste alumina material.

Description

technical field [0001] The invention relates to the field of utilization of metallurgical solid waste, in particular, the invention relates to a system and a method for preparing ceramic balls by using ferrochrome slag. Background technique [0002] Alumina ceramic balls have the characteristics of high temperature and high pressure resistance, low water absorption, high mechanical strength and stable chemical properties, and are widely used in petroleum, chemical, environmental protection and other industries. At present, alumina inert ceramic balls are made of industrial alumina powder as the main raw material, adding binder and sintering aids through batching, molding and high-temperature firing. Conventional ceramic ball production uses high-grade alumina as raw material. Production costs are high. Raw materials must be finely ground, which consumes a lot of energy; then they are molded and sintered at high temperature, resulting in a long production process and high en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/138C04B35/10
CPCC04B33/1324C04B33/1328C04B33/138C04B35/10C04B2235/3206C04B2235/3208C04B2235/3222C04B2235/3232C04B2235/3241C04B2235/3272C04B2235/3418C04B2235/3463C04B2235/77C04B2235/96Y02P40/60
Inventor 闫方兴任中山徐刚郑常乐李永卿陈佩仙吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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