Preparation of carbonaceous composite pellet containing manganese

A technology of compound pelletizing and briquetting, which is applied in the field of raw materials for manganese-based ferroalloy smelting, can solve the problems of high dosage of binders and additives, unfavorable industrial application, complex pellet composition, etc., so as to reduce production costs and improve resource utilization. Efficiency, the effect of simplifying the production process

Inactive Publication Date: 2009-04-15
云南文山斗南锰业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this method are: composite pellets are used as deoxidizers and alloying additives to generate more slag; the composition of pellets is too complex to be conducive to industrial application; the amount of binder and additives is large

Method used

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  • Preparation of carbonaceous composite pellet containing manganese

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Material preparation and measurement

[0041] Table 4 Ingredients

[0042] name

Fine ore concentrate 1(%)

Sinter(%)

Smoke (%)

Coal 2(%)

Average moisture (%)

quantity

27.50

24.57

31.43

14.50

4.3

[0043] The amount of each batch is 800Kg.

[0044] (2) mixed grinding

[0045] Dry powder binder: 1.5% Supplementary water: 5% Mixing time: 5min

[0046] (3) Pressure ball

[0047] The speed of the pressure ball roller is 10n / min, and the pressure between the rollers is 6.5 MPa. The wet bulb was dropped three times without failure.

[0048] (4) dry

[0049] Drying temperature: 150°C, time: 2h, dry bulb moisture: 1.01%;

[0050] Table 5 Dry bulb strength values

[0051] name

Embodiment 2

[0053] (1) Material preparation and measurement

[0054] Table 6 Ingredients

[0055] name

Fine ore concentrate 3(%)

Imported ore (%)

Smoke (%)

Coal 2(%)

Average moisture (%)

quantity

19.78

34.07

29.63

14.52

3.85

[0056] The amount of each batch is 800Kg.

[0057] (2) mixed grinding

[0058] Dry powder binder: 2% Supplementary water: 6.15% Mixing time: 10min

[0059] (3) Pressure ball

[0060] The speed of the pressure ball roller is 5n / min, and the pressure between the rollers is 10MPa. The wet bulb was dropped three times without failure.

[0061] (4) dry

[0062] Drying temperature: 175°C, time: 2h, dry bulb moisture: 0.83%;

[0063] Table 7 Dry bulb strength values

[0064] name

Embodiment 3

[0066] (1) Material preparation and measurement

[0067] Table 8 Ingredients

[0068] name

Fine ore concentrate 2(%)

Imported ore (%)

Smoke (%)

Coal 1(%)

Average moisture (%)

quantity

27.40

29.30

24.60

16.70

5.2

[0069] The amount of each batch is 800Kg.

[0070] (2) mixed grinding

[0071] Dry powder binder: 2% Supplementary water: 3.8% Mixing time: 7.5min

[0072] (3) Pressure ball

[0073] The speed of the pressure ball roller is 7.5n / min, and the pressure between the rollers is 8.5MPa. The wet bulb was dropped three times without failure.

[0074] (4) dry

[0075] Drying temperature: 183°C, time: 2h, dry bulb moisture: 0.92%;

[0076] Table 9 Dry bulb strength values

[0077] name

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Abstract

The invention discloses a preparation method of a composite pellet, which includes the working procedures of preparing materials, measuring, mulling, pressing and drying. Compared with the prior art, the preparation method is simple to be operated and has the advantages that: (1) the composite conception is broad; the pellet not only has a manganese material, but also has a reducer needed by smelting and takes coal for replacing tar and reducing the production cost; the material containing manganese not only includes the powder of a manganese ore (molybdenum concentrate, imported fine ore, slag rich in manganese, sintering fine ore and baking fine ore), but also includes manganese soot and improves the operating factor of resources; (2) the materials adopted by the composite pellet are broad in granularity; the granularity of the manganese ore (molybdenum concentrate, slag rich in manganese, sintering fine ore and baking fine ore) is between 0 and -3mm, the granularity of the coal is between 0 and -5mm, and the production technique is simplified; (3) drying is carried out under lower temperature, thus saving energy resources; and (4) a dry power sintering agent is used and the operation is simple and convenient. The composite pellet is applied to smelting manganese series iron alloys by electric furnaces and the smelting effect of the electric furnaces is good.

Description

technical field [0001] The invention relates to raw materials for smelting manganese-based ferroalloys, in particular to the improvement of a block-making method for manganese-based ferroalloy raw materials. Background technique [0002] There is no steel without manganese, and manganese is an indispensable and important raw material for the iron and steel industry. 90% of the total manganese is used in the iron and steel industry. Manganese is a deoxidizer and desulfurizer for steelmaking; manganese can improve the strength, hardenability, hardness and wear resistance of steel, and is the most important alloying element of steel. In addition, manganese is widely used in various fields of the national economy and is an important raw material for the development of modern metallurgy, military industry, chemical industry, electronics, petroleum, aerospace, shipbuilding, machinery, light industry and other industries. [0003] A large amount of flue gas is produced during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/14C22B1/242
Inventor 王运正俞德庆高德云杭祖辉张玉林张承贵张玉明王宁马进宋华琳
Owner 云南文山斗南锰业股份有限公司
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