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A method of agglomeration of ferroalloy fines such as ferromanganese, ferrochrome and ferrosilicon fines

A technology of ferroalloy and ferrosilicon powder, which is applied in the field of agglomeration of ferromanganese powder, and can solve the problems that ferroalloy powder has not been developed.

Inactive Publication Date: 2010-12-08
TATA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, agglomeration of ferroalloy powders is still unexplored in this technical field

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] As shown in Figure 1, the agglomeration steps of ferroalloy powder are as follows:

[0015] a. Screening and crushing of oversized (>3 mm) particles: In the ferroalloy industry, during the screening of cast ferromanganese agglomerates, material below 10 mm produced is called pulverized. Powders 3mm cannot be properly agglomerated by conventional agglomeration methods, but need to be crushed to reduce to the size range <3mm.

[0016] b. Binder Mixing: The binder in wt% is mixed with the powder to obtain a proper distribution of the binder in the material. The adhesive properties are shown in Table 1.

[0017] Table 1: Binder properties

[0018] resin

[0019] c. Compaction: 60-80 g of the mixed material is kept in a mold with a diameter of 3 cm, pressed with a press with a load of up to 5 tons, and the agglomerates prepared are removed and stored for further processing.

[0020] The green strength of the agglomerates was 7 drops from a height of 500 cm. The...

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Abstract

A method of agglomeration of ferroalloy fines such as ferromanganese, ferrochrome and ferrosilicon fines comprising the steps of: Providing ferroalloy fines below 10mm size; Sieving <3mm size fraction and crushing 3-10mm to produce <3mm fines; mixing the resulted fines with a phenol formaldehyde resol resin binder in a vessel; compacting the mixed fines in a compressive machine in batches to form agglomerates; curing the agglomerates on heating in a furnace maintained at a temperature range 150-200 DEG C for about 60 to 90 minutes.

Description

technical field [0001] The present invention relates to a method for agglomeration of ferroalloy powders such as ferromanganese, ferrosilicon, silicon manganese and ferrochrome powders. More particularly, the present invention relates to a method of agglomerating ferromanganese fines from sieved ferromanganese agglomerates. Background technique [0002] In order to produce better quality steel in an open hearth furnace, silicon, chromium, phosphorus, etc. must be added to the charge, bath, ladle and mold in the form of ferroalloys ranging from as little as 5% to more to 85%. Important ferroalloy products are ferrosilicon, high-carbon ferromanganese and ferrochromium, silicon-manganese alloys and calcium silicide, usually prepared in electric furnaces. However, low-grade ferroalloys can be produced more cheaply in blast furnaces from ores or concentrates containing silicon, manganese or chromium. Such ferroalloys are produced in the form of briquettes. Ferroalloy agglomer...

Claims

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Application Information

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IPC IPC(8): C22B1/16C22B1/244B22F3/02B22F1/148
CPCC22B1/248C22B1/244B22F1/0096C22B1/24B22F1/148
Inventor V·辛格S·M·拉奥P·马里克S·德瓦拉普蒂P·K·米施拉
Owner TATA STEEL
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