Efficient environment-friendly cheap adhesion agent of pellet and preparation method thereof

Abstract

The invention relates to an efficient environment-friendly cheap adhesion agent of pellet, which is prepared from the following raw materials in parts by weight: 65-75 parts weathered coal, 7-9 parts of sodium hydroxide, 1-3 parts of sodium lignin sulfonate, 7-9 parts of starch, 1-3 parts of cellulose, 4-6 parts of lime, 4-6 parts of coal gangue and 1-3 parts of borax; the invention further relates to a preparation method of the efficient environment-friendly cheap adhesion agent of pellet, comprising the following steps of: 1) respectively taking out the weathered coal, the lime and the coal gangue according to the needed parts by weight, mixing and crushing for later use; 2) taking out the needed parts by weight of sodium hydroxide, adding water, heating up and stirring until dissolving the sodium hydroxide sufficiently for later use; 3) mixing the materials respectively prepared in the steps 1) and 2), stirring evenly, backing to dry, and crushing for later use; 4) taking out the needed parts by weight of sodium lignin sulfonate, starch, cellulose and borax, and mixing with the material prepared in the step 3), stirring and packaging, thereby obtaining the adhesion agent. The adhesion agent provided by the invention is suitable for preparation of pellet, and has the advantages of scientific and rational matching of ingredients, high pellet forming quality, good smelting result, low cost and easy preparation.

Description

technical field [0001] The invention belongs to a metallurgical binder, in particular to a binder used for making pellets in iron and steel smelting and a production method thereof. Background technique [0002] With the development of the iron and steel industry, the amount of raw materials required for ironmaking is increasing. During smelting, in order to improve the efficiency of smelting and the quality of iron, the ore needs to be finely ground and selected to make pellets before being put into the furnace. At present, pellets have become one of the main furnace raw materials in the iron and steel industry, and the quality and cost of pellets are also the main bottlenecks for iron and steel enterprises to reduce costs. Pellets can be obtained by different methods, such as oxidized pellets, cold-set pellets, metallized pellets, etc. Among them, the formation of various pellets is inseparable from binders. The binder is an indispensable and important component for maki...

AI Technical Summary

Problems solved by technology

Inorganic binders such as: bentonite, sodium silicate, slaked lime, cement, clay, etc.; the main inorganic binder is bentonite, and the application of bentonite binder is mature, and our country is rich in bentonite resources, with low mining and processing costs, strong adaptability and controllability It has a wide range; but its burnout rate is high, and the use of bentonite as a binder will inevitably lead to a decrease in the iron grade of the raw material entering the furnace, and an increase in the silicon content, which will increase the amount of slag in blast furnace ironmaking and smelting, reduce the blast furnace coefficient, and reduce the fuel consumption. rise

Organic binders, such as: humic acid, uric acid, carboxymethyl cellulose, etc., organic binders used in metallurgical pellets have good bonding effect and less dosage, but their prices are high and their applications are immature. The requirements for the concentrate powder and pelletizing process are strict, and the organic binder will undergo oxidative decomposition and other reactions during the heating and preheating roasting process, which will generate stress and destroy the preheating pellet structure, resulting in low preheating strength. Therefore, our country fewer applications

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