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Spheroidizing Production Method of Centrifugal Roll Core

A production method and roll technology, which is applied in the field of spheroidizing the core of centrifugal rolls, can solve the problems of the influence of the service life of the top suction dust removal device, the high cost of the top suction dust removal device, and the poor dust removal effect, etc., and achieve the spheroidization effect Stability, smooth response, and the effect of reducing production costs

Active Publication Date: 2016-09-07
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because a large amount of smoke and dust will be generated during the spheroidization process, which will cause environmental pollution. With the requirements of clean production, no dust removal method for spheroidization treatment is no longer allowed to continue production. Therefore, the original spheroidization treatment method is used. A top suction dust removal device must be installed above the furnace, but the high temperature of the furnace and molten iron will affect the service life of the top suction dust removal device. At the same time, the installation of the top suction dust removal device on the upper part of the plant is expensive and the dust removal effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A production method for spheroidizing the core of a centrifugal roll, comprising the following steps:

[0020] Step a, adding raw materials into the furnace for smelting;

[0021] Step b, after the molten iron reaches 1420°C, it is taken out of the furnace and enters the ladle, and the ladle is transferred to the side suction dust removal station by a crane;

[0022] Step c, when the temperature of the molten iron is 1380°C, pour the molten iron in the ladle into a pouring ladle containing a nodulizer for nodulizing treatment, the flow rate of the poured molten iron is 5000kg / min, and the nodulizer is a rare earth magnesium nodulizer , the chemical composition and mass percentage are: Mg: 8%, rare earth: 2%, Si: 30%, the rest is Fe, and the amount of nodulizer added is 1.0% of the molten iron;

[0023] Step d, controlling the temperature of the molten iron slag in the pouring ladle;

[0024] Step e, pouring the roll core.

Embodiment 2

[0026] A production method for spheroidizing the core of a centrifugal roll, comprising the following steps:

[0027] Step a, adding raw materials into the furnace for smelting;

[0028] Step b, after the molten iron reaches 1480°C, it is taken out of the furnace and enters the ladle, and the ladle is transferred to the side suction dust removal station by a crane;

[0029] Step c, when the temperature of the molten iron is 1450°C, the molten iron in the ladle is poured into a pouring ladle containing a nodulizer for nodulizing treatment. The flow rate of the poured molten iron is 7500kg / min, and the nodulizer is a rare earth magnesium nodulizer , the chemical composition and mass percentage are: Mg: 10%, rare earth: 2.5%, Si: 35%, the rest is Fe, and the amount of nodulizer added is 1.2% of the molten iron in the pouring ladle;

[0030] Step d, controlling the temperature of the molten iron slag in the pouring ladle;

[0031] Step e, pouring the roll core.

Embodiment 3

[0033] A production method for spheroidizing the core of a centrifugal roll, comprising the following steps:

[0034] Step a, adding raw materials into the furnace for smelting;

[0035] Step b, after the molten iron reaches 1540°C, it is taken out of the furnace and enters the ladle, and the ladle is transferred to the side suction dust removal station by a crane;

[0036] Step c, when the temperature of the molten iron is 1510°C, pour the molten iron in the ladle into a pouring ladle containing a nodulizer for nodulizing treatment, the flow rate of the poured molten iron is 10,000kg / min, and the nodulizer is a rare earth magnesium nodulizer , the chemical composition and mass percentage are: Mg: 11%, rare earth: 3%, Si: 40%, the rest is Fe, and the amount of nodulizer added is 1.5% of the molten iron.

[0037] Step d, controlling the temperature of the molten iron slag in the pouring ladle;

[0038] Step e, pouring the roll core.

[0039] Using the above steps, the molten...

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PUM

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Abstract

The invention discloses a method for producing a core part of a centrifugal roller by a spheroidizing process, and belongs to the field of roller cores. The method comprises the following steps: a, adding raw materials into a smelting furnace for smelting; b, discharging molten iron after reaching a tapping temperature, entering a molten iron ladle, and transferring the molten iron ladle to a side absorption type dust removal station through a crane; c, pouring the molten iron in the ladle into a pouring ladle filled with a spheroidizing agent for spheroidizing; d, performing slagging-off and temperature control on the molten iron in the pouring ladle; e, performing pouring on the roller core, wherein the tapping temperature of the molten iron in the step b is 1,420-1,540 DEG C and the spheroidizing temperature for pouring the molten iron into the pouring ladle in the step c is 1,380-1,510 DEG C. The method for producing the core part of the centrifugal roller reduces production cost, alleviates pollution and meets environmental protection and clean production requirements.

Description

technical field [0001] The invention relates to a production method of a roll core, in particular to a production method of a roll core adopting an inverted spheroidization process. Background technique [0002] The roll is composed of a roll core and a roll sleeve set outside the roll core. The material of the roll core is nodular cast iron. The molten iron that has not been spheroidized needs to be spheroidized before pouring. The original spheroidization treatment method is After the molten iron in the furnace is taken out of the furnace, it directly enters the molten iron ladle that is hoisted by the crane and added with nodulizing agent for nodulizing treatment. Because a large amount of smoke and dust will be generated during the spheroidization process, which will cause environmental pollution. With the requirements of clean production, no dust removal method for spheroidization treatment is no longer allowed to continue production. Therefore, the original spheroidiza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/10C22C33/10C22C37/04
Inventor 冯文辉王增强李红权王玉刚王军书王延强周亮
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL