Adhesive for iron-ore pelletizing and preparing method

A technology for binder preparation and iron ore balls, which is applied in the field of binders, can solve the problems of decreased pellet strength, binder decomposition, poor thermal performance, etc., and achieves reduced additions, improved quality, and good bonding performance Effect

Inactive Publication Date: 2006-08-09
WUHAN UNIV OF SCI & TECH
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  • Summary
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Problems solved by technology

However, if the consolidation temperature exceeds the decomposition temperature of Peridur molecules, the binder may decompose and the pellet s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] A method for preparing a binder for iron ore pellets: 25-35% of sodium carboxymethyl starch, 5-8% of polyacrylamide, 1-5% of sodium humate, water-resistant putty powder 30-40%, 3-5% kaolin, 8-10% ferrous sulfate, and 5-10% sodium carbonate are finely ground and mixed, and the content of the finely ground particle size ≤0.074mm is ≥80%. The molecular weight of polyacrylamide is more than 3 million.

[0010] This embodiment has good bonding performance, strong thermal performance, reduced additive amount, no increase in cost, and no impurities.

[0011] Iron ore pellets are prepared with this binder, and the iron ore raw materials used are: 64.0-66.0wt% of TFe, 26.0-28.0wt% of FeO, 1.0-2.0wt% of CaO, 1.5-2.5wt% of MgO, SiO 2 3.5-5.5wt%, adding 0.3-0.5wt% binder, and under the same conditions and other binders for a comprehensive comparison. The comparison of pellet greening performance is shown in Table 1, and the comparison of pellet comprehensive performance is shown...

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Abstract

This invention relates to an adhesive agent used in iron ore pellets and its preparation method including:grinding and mixing carboxymethyl sodium starch: 20-40%, PAA: 5-10%, PP: 0-5%, sodium humate: 0-5%, water-proof putty powder: 20-40%, Kaolin: 3-5%, ferrisulfas: 5-10% and soda: 5-10%, in which, the content of fine grinded particles smaller or equal to 0.074mm is greater or equal to 80%, the molecular weight of the PAA is over 3 million.

Description

1. Technical field [0001] The invention belongs to the technical field of adhesives. In particular, it relates to a binder for iron ore pellets and a preparation method thereof. 2. Background technology [0002] In the iron ore pelletizing process, in order to improve the pelletizing properties of materials, increase the strength of wet and dry pellets, improve the thermal stability of materials, improve product quality, and reduce energy consumption, an effective way is to use a suitable binder. It does not increase equipment investment, does not change the original production process, and can obtain the effect of increasing production. Therefore, agglomerates at home and abroad attach great importance to the development and application of binders. [0003] At present, the binder used for iron ore pellets in production is mainly bentonite. The bentonite binder can regulate the water content of pellet raw materials, stabilize the operation of pellets, and improve the stre...

Claims

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Application Information

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IPC IPC(8): C22B1/242
Inventor 张一敏陈铁军刘涛
Owner WUHAN UNIV OF SCI & TECH
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