Limestone cellulose ether iron ore pellet composite additive, and preparation method and application thereof

A composite additive, cellulose ether technology, applied in the field of binder for iron ore pellets, can solve the problems of poor physical properties and metallurgical properties of the finished pellets, high production cost, and achieve excellent heat absorption and thermal conductivity. Strong wrapping performance, avoid the effect of wasting raw materials

Inactive Publication Date: 2012-02-29
钱国春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the defects of high production cost, poor physical properties and metallurgical properties of finished pellet balls when cellulose ether is used as the main component of the pellet binder, and provide A new iron powder binder for iron ore pellets. The binder uses ultrafine cellulose ether as its main binder component. It has low production cost and strong bonding performance, and can effectively improve the green pellet strength and Burst temperature, thereby significantly improving the grade and quality of the finished ball all-iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 Preparation of Limestone Cellulose Ether Iron Ore Pellet Composite Additive

[0046] Weigh each raw material according to the following parts by weight (unit: kg): methyl cellulose ether 15 kg, iron powder 7.5 kg, hydroxyethyl starch 135 kg, limestone powder 850 kg;

[0047] Add iron powder and methyl cellulose ether into a micro-powder mill (micro-powder mill produced by Shanghai Xieke Machinery Co., Ltd., its model is "HGM8021") and grind for 40 minutes to obtain component 1; the methyl cellulose in component 1 The particles of cellulose ether are all 600-2000 mesh particles, most of which have a particle size distribution of 1000-2000 mesh;

[0048] Add hydroxyethyl starch and limestone powder to a micropowder mill (micropowder mill produced by Shanghai Xieke Machinery Co., Ltd., the model is "HGM8021") and grind for 20 minutes to obtain component 2;

[0049] Mix component 1 and component 2 in a pulverizer, and continue pulverizing for 10 minutes to obta...

Embodiment 2

[0050] Embodiment 2 Preparation of Limestone Cellulose Ether Iron Ore Pellet Composite Additive

[0051] Weigh each raw material according to the following parts by weight (unit: kg): ethyl cellulose ether 5 kg, iron powder 1 kg, hydroxypropyl starch 90 kg, limestone powder 500 kg;

[0052] Add iron ore concentrate and ethyl cellulose ether into a micro-powder mill (micro-powder mill produced by Shanghai Xieke Machinery Co., Ltd., its model is "HGM8021") and grind for 40 minutes to obtain component 1; The particles of ethyl cellulose ether are all 600-2000 mesh particles, most of which have a particle size distribution of 1000-2000 mesh;

[0053] Add hydroxypropyl starch and limestone powder to a micro-powder mill (micro-powder mill produced by Shanghai Xieke Machinery Co., Ltd., the model is "HGM8021") and grind for 20 minutes to obtain component 2;

[0054] Mix component 1 and component 2 in a pulverizer, and continue pulverizing for 10 minutes to obtain.

Embodiment 3

[0055] Example 3 Preparation of Limestone Cellulose Ether Iron Ore Pellet Composite Additive

[0056] Weigh each raw material (unit: kg) according to the following parts by weight: 30 kg of carboxymethyl cellulose ether, 12 kg of iron powder, 190 kg of acryl starch, and 1200 kg of limestone powder;

[0057] After pulverizing the hematite to 100 mesh and adding carboxymethyl cellulose ether to a micro-powder mill (micro-powder mill produced by Shanghai Xieke Machinery Co., Ltd., the model is "HGM8021") for pulverization for 40 minutes to obtain component 1; The carboxymethyl cellulose ether particles in component 1 are all 600-2000 mesh particles, and the particle size distribution of most of the particles is 1000-2000 mesh;

[0058] Add acrylic starch and limestone powder to a micropowder mill (micropowder mill produced by Shanghai Xieke Machinery Co., Ltd., the model is "HGM8021") and grind for 20 minutes to obtain component 2;

[0059] Mix component 1 and component 2 in a...

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Abstract

The invention discloses a limestone cellulose ether iron ore pellet composite additive, and a preparation method and the application thereof, which belong to the field of metallurgy. The additive disclosed by the invention comprises the following raw materials: cellulose ether, iron powder, starch ether and limestone powder. The preparation method of the additive comprises the following steps: the cellulose ether and the iron powder are firstly smashed, and a component I is obtained; the starch ether and the limestone powder are smashed, and a component II is obtained; and the component I andthe component II are mixed and are continuously smashed, and then the additive is obtained. The limestone cellulose ether iron ore pellet composite additive disclosed by the invention has an excellent adhesive property and an excellent packaging property, the physical properties and the metallurgical properties of pellet end product balls can be effectively improved, the production cost and the energy consumption can be effectively reduced while the all iron level, the quality and the yield of the end product balls are comprehensively improved, and the additive is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a pellet binder for metallurgy, in particular to a limestone cellulose ether iron ore pellet composite additive for producing iron ore pellets and a preparation method thereof. The invention belongs to the binder of iron ore pellets binder field. Background technique [0002] Binder is an indispensable and important component for making iron concentrate powder into pellets. A binder with good performance will play an important role in improving the quality of pellets and ironmaking economic and technical indicators, promoting energy saving and reducing consumption, and realizing environmental friendliness. to a very important role. In order to achieve the above technical effects, the binder is required to have good cohesiveness and ball forming properties, and the green balls produced should have good anti-knock performance, high dry and wet ball compression and drop strength; the finished balls after roasting Not only its c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
Inventor 刘贵堂钱国春
Owner 钱国春
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