Pellet iron-based compound adhesive and preparing and using method thereof
A technology for pellets and binders, applied in the field of sintered pellet preparation, can solve the problems of poor preheating and roasting pellet strength, lack of detailed description, low burst temperature, etc., achieves good mixing and binding effect, and reduces processing costs , the effect of efficient recycling of resources
Active Publication Date: 2019-12-31
ANGANG STEEL CO LTD
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Problems solved by technology
The Chinese patent with the patent number CN201510363539.8 discloses a "iron ore pellet iron-rich composite binder and its preparation method and application", in which the iron ore pellet iron-rich composite binder includes a mass ratio of 100: 1 to 10 iron mud and tackifier, wherein the tackifier is carboxymethyl cellulose, and the total iron content in the iron-rich composite binder is 35 to 40wt%, (SiO 2 +Al 2 o 3 ) content is ≤ 25wt%; the iron-rich composite binder in this technical scheme is only dried iron sludge and mixed with macromolecular organic matter mechanically and physically, and it simply introduces adding 1.0% iron-rich composite binder However, there is no detailed description of the effect of adding iron-rich composite binder on preheating roasting and finished pellets. At the same time, there are low bursting temperature, large amount of powder, and preheating and roasting pellet strength. Bad question
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[0022] A preparation method of a pellet iron-based composite binder, comprising the following steps:
[0023] 1) Put the weighed converter OG mud into the reaction vessel according to the dry basis ratio;
[0024] 2) The hydroxypropyl methylcellulose solution obtained after the etherification reaction of hydroxypropyl methylcellulose is directly added to the reaction vessel equipped with converter OG mud according to the dry basis ratio;
[0025] 3) Add the instant sodium carboxymethylcellulose solution into the reaction vessel equipped with converter OG mud according to the dry basis ratio;
[0026] 4) The reaction vessel is placed in a microwave generator, and the heap leaching reaction is radiated and heated for 10 to 20 minutes; the heating temperature is 100 to 110° C., and the dried product is ground and sieved to obtain the iron-based pellets. Binder, the particle size of the finished product is composed of particles less than 0.044mm accounting for more than 95%.
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The invention relates to a pellet iron-based compound adhesive and a preparing and using method thereof. The pellet iron-based compound adhesive is prepared from 95-97% of converter OG slurry, 1-2.2%of hydroxypropyl methyl cellulose and 1-2.9% of instant sodium carboxymethylcellulose according to the dry base weight percentage. By using the converter OG slurry not squeezed or dewatered as the iron-containing raw material, adding a hydroxypropyl methyl cellulose solution and an instant sodium carboxymethylcellulose solution not dewatered or dried and conducting microwave radiation heating, dump leaching reaction and deep fusing, the pellet iron-based compound adhesive is obtained, the efficient resourceful utilization of the converter OG slurry is realized, the production process of the iron-based compound adhesive is simplified and shortened, the quality of pellets can be easily improved, and the production cost of an iron and steel complex is reduced.
Description
technical field [0001] The invention relates to the technical field of sintered pellet preparation, in particular to a pellet iron-based composite binder and methods for preparing and using the same. Background technique [0002] Pellets are one of the main raw materials for blast furnace ironmaking. Binders are usually added during the production of pellets. At present, the binder used in the production of pellets in my country is still mainly bentonite, and the amount of bentonite added is 1.5% to 2.0%. Due to the high impurity content and large amount of bentonite, it is difficult to improve the pellet performance and iron grade. Therefore, the development and development of new high-efficiency and functional binders to replace bentonite or reduce the amount of bentonite added is one of the important hotspots in the research and development of the current metallurgical auxiliary materials industry. [0003] In the technical solutions disclosed in Chinese patents with pat...
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Login to View More IPC IPC(8): C22B1/242
CPCC22B1/2406C22B1/242
Inventor 李金莲朱建伟宫作岩张立国任伟韩子文王亮张伟王小强国泉峰
Owner ANGANG STEEL CO LTD