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Cold press composite pellet binder

A technology of composite pellets and binders, applied in the field of new binders, can solve the problems of general-purpose binders and versatility that are difficult to use for various mineral powders, and achieve cost reduction, energy saving, and promotion The effect of comprehensive utilization of resources

Active Publication Date: 2012-07-25
云南文山斗南锰业股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many kinds of binders to choose from, once the technical and economic factors are comprehensively considered, it will be found that it is difficult to have a universal binder suitable for a variety of mineral powders. It can only be said that under specific raw material conditions , choose the kind of binder that can better meet the required smelting process requirements, of course, for the same type of mineral powder, the versatility still exists

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Ingredients

[0018] Table 1: Ingredients (%) by weight percentage

[0019] name powder concentrate 3 Imported ore soot Coal 2 average moisture quantity 19.78 34.07 29.63 14.52 3.85

[0020] The amount of each batch is 800Kg.

[0021] (2) mixed grinding

[0022] Table 2: Binder composition (%) by weight percentage

[0023] name potato starch potassium permanganate sodium hydroxide Solid Sodium Silicate Potassium Aluminum Sulfate Sodium fluorosilicate quantity 33.5 4 31 18 5.5 8

[0024] Dry powder binder dosage: 2% Supplementary water: 6.15% Mixing time: 10min

[0025] (3) Pressure ball

[0026] The speed of the pressure ball roller is 5n / min, and the pressure between the rollers is 7.5MPa. The wet bulb was dropped three times without failure.

[0027] (4) dry

[0028] Drying temperature: 175°C, time: 2h, dry bulb moisture: 0.83%;

[0029] Table 3: Dry Bulb Strength Values ​​by Weight Perc...

Embodiment 2

[0032] (1) batching is identical with embodiment 1

[0033] (2) mixed grinding

[0034] Table 4: Binder composition (%) by weight percentage

[0035] name corn starch potassium permanganate sodium hydroxide Sodium silicate Potassium Aluminum Sulfate Sodium fluorosilicate quantity 40 3 20 23 7 7

[0036] Binder dosage: 2.8% Supplementary water: 6.15% Mixing time: 10min

[0037] (3) Pressure ball

[0038] The speed of the pressure ball roller is 5n / min, and the pressure between the rollers is 7.5MPa. The wet bulb was dropped three times without failure.

[0039] (4) dry

[0040] Drying temperature: 175°C, time: 2h, dry bulb moisture: 0.83%;

[0041] Table 5: Dry Bulb Strength Values

[0042] name dry ball 1 dry ball 2 dry ball 3 dry ball 4 dry ball 5 average Strength value (MPa / 个 ) 球 332 361 297 341 322 330.6

Embodiment 3

[0044] (1) batching is identical with embodiment 1

[0045] (2) mixed grinding

[0046] Table 6: Binder composition (%) by weight percentage

[0047] name corn starch potassium permanganate sodium hydroxide Sodium silicate Potassium Aluminum Sulfate Sodium fluorosilicate quantity 27 4 32 20 7 10

[0048] Dry powder binder dosage: 1.3% Supplementary water: 6.15% Mixing time: 10min

[0049] (3) Pressure ball

[0050] The speed of the pressure ball roller is 5n / min, and the pressure between the rollers is 7.5MPa. The wet bulb was dropped three times without failure.

[0051] (4) dry

[0052] Drying temperature: 175°C, time: 2h, dry bulb moisture: 0.83%;

[0053] Table 7: Dry Bulb Strength Values

[0054] name dry ball 1 dry ball 2 dry ball 3 dry ball 4 dry ball 5 average Strength value (MPa / 个 ) 球 276 341 295 312 311 307

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PUM

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Abstract

The invention relates to a novel caking agent for preparing a pellet used for smelting by using a cold pressing method, in particular to a caking agent which needs to be added when using the cold pressing method to prepare a composite pellet comprising manganese powder. The invention is characterized in that the caking agent is formed by mixing the following two matters: (1) cornstarch and potatostarch are used as the main materials, potassium permanganate and sodium hydroxide are added and mixed; and (2) solid sodium silicate is used as a main component, aluminum potassium sulfate and sodium fluosilicate are added. The first types of matters mainly obtain the wet pellet intensity and meet the intensity demand of the strap transmission on the pellet between a pellet press and a drying kiln. The second types of matters mainly obtain the dry pellet intensity, meet the intensity demand of transmission and autoimmunization pellet matching on the pellet and maintain the pellet to not crack at high temperature. Compared with the traditional sintering technique, the cold-pressing composite pellet caking agent saves the energies and reduces pollution. The technique can also be applied toproduce carbon pellets, realizes using coal for replacing coke, reduces the cost of the reducer and promotes the comprehensive utilization of the resources.

Description

technical field [0001] The invention relates to a new type of binder for preparing pellets for smelting by cold pressing, more specifically, it belongs to the binder that needs to be added when preparing composite pellets containing manganese powder by cold pressing. Binder plays a key role in the preparation of composite pellets. Background technique [0002] About 90% of my country's manganese ore is lean ore containing less than 30% manganese. Generally, coarse-grained ore washing, gravity separation and strong magnetic separation are used. With the development of production, the amount of fine ore is gradually increasing. Due to the amount of lump ore Insufficient supply, objectively requires the use of fine ore to make agglomerates. Due to the small amount of processing and other reasons, manganese powder ore agglomeration is mostly sintered by the earth method, that is, the so-called flat blowing - the ore powder and coke powder are piled on the ground grate, and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/243
Inventor 张玉林杭祖辉陈世刚王仕勇马文清龙胜宗谢家福姚春丽
Owner 云南文山斗南锰业股份有限公司