Rollscale impurity-removing system and process

A technology of iron scale and impurity, which is applied in the rolling iron scale impurity removal system and process field under high temperature conditions, to achieve the effect of improving the grinding process conditions, increasing product output, and prolonging the life of equipment

Inactive Publication Date: 2005-07-20
宝钢集团上海梅山有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But at present, there is no better means to remove the impurities in the rolled steel scale

Method used

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  • Rollscale impurity-removing system and process

Examples

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Effect test

Embodiment 1

[0012] Embodiment 1: referring to accompanying drawing, during production, iron scale raw material is loaded into grid sieve 1, and iron scale raw material is sorted into sieve upper material and sieve lower material and enters respective lower hoppers, and sieve upper material is impurity, and sieve lower material is made of 1 # Elevator 2 into 1 # Silo 3, 1 # The iron scale raw material in the silo 3 is sent to the drying kiln 4 for drying. The drying temperature is 200°C for 30 minutes. The temperature control is based on the effective removal of oil and water impurities. After drying, the high-temperature iron scale passes through 2 # Elevator 5 into 2 # The silo 6 is evenly fed to the belt conveyor 7. The iron scale raw material is on the belt conveyor 7. When passing through the iron remover 8, metal iron impurities are removed, and when passing through the high-temperature resistant magnetic roller 9, small particles and micro-particle impurities are removed. When the...

Embodiment 2

[0013] Example 2: The drying temperature is 160°C, and the drying time is 40 minutes; the magnetic field strength of the high temperature-resistant magnetic roller is 2400 Gauss, and the working temperature is 240°C. All the other are identical with embodiment 1. After the impurity removal process is used, (1) the silicon dioxide content is reduced to 0.29%; (2) the product quality of iron oxide powder is improved, Fe 2 o 3 The average value of the percentage content is increased from 98% to 99.2%.

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Abstract

The present invention relates to a high-temperature steel-rolling forging scale impurity-removing equipment and its process. It is formed from equipments of bar grizzly, drying kiln, iron-remover and high-temperature magntic drum. Said invention utilizes the multistage impurity-removing process of using bar grizzly to make separation, using drying kiln to make high-temperature drying treatment and using high-temperature magnetic drum to make magnetic separation so as to can effectively remove most of harmful impurities from forging scale raw material, and can raise quality of forging scale raw material and can produce high-quality ironoxide powder.

Description

1. Technical field: [0001] The technology of the invention relates to an impurity removal system and process, in particular to a system and process for removing impurities from steel scale rolled under high temperature conditions. 2. Background technology: [0002] When rolling iron scale is used as raw material to produce iron oxide powder, due to factors such as changes in rolling steel types, rolling equipment maintenance, operation, collection, stacking, and transportation, there are many impurities in rolled steel scale, mainly iron in the form of metallic iron. Scales, silicate substances with silicon dioxide as the main component, oily substances and water. These impurities are very harmful to the performance of the product and affect the grade and quality of the product. Therefore, the production of iron oxide powder with rolled steel scale must effectively remove impurities in order to obtain high-grade iron oxide powder products. Impurity removal technology has bec...

Claims

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Application Information

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IPC IPC(8): B03C1/02B07B1/00F26B3/00
Inventor 徐望华姚冬晚衣德强杜成琪崔建高
Owner 宝钢集团上海梅山有限公司
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