Iron ore powder pellet adhesive and application thereof

A technology of binder and powder pellets, which is applied in the field of mineral processing, can solve problems such as the difficulty of large-scale industrial supply of chrysanthemum root, low cohesive force, and reduced output, and achieve good ball-making indicators, increased cohesive force, and reduced dosage Effect

Inactive Publication Date: 2014-07-23
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese Patent Publication (Announcement) No.: CN102719664A, proposes to be made into pellet binder with chrysanthemum root, sodium carboxymethyl cellulose CMC and montmorillonite (bentonite) composition, but chrysanthemum root is not easy for large-scale industrial supply, and CMC is bonded Low strength, the main dosage is 4-7% of iron powder
In production practice, when the iron ore powder is very coarse (0.074mm is less than 70%), the proportion of red ore increases, and the particle size ratio of green ore and red ore is even more uncoordinated, that is, when the green ore is finer and the red ore is thicker, it will become It is extremely difficult to form balls, the number of broken balls increases, and the output is greatly reduced

Method used

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  • Iron ore powder pellet adhesive and application thereof
  • Iron ore powder pellet adhesive and application thereof
  • Iron ore powder pellet adhesive and application thereof

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Embodiment 1-5

[0018] When preparing pellets, first prepare a mixture, the chemical composition and weight percentage of the mixture are: iron ore powder pellet binder 0.9-1.1%; sodium carbonate 3.5%; bentonite 95.5%, and then add iron ore powder For a mixture of 0.8-1.2% by weight, the composition of the binder and the wet bulb index of the pellets are shown in Table 1:

[0019] Table 1 Iron ore powder pellet binder composition and pellet wet bulb index

[0020]

[0021] Note: In Table 1, PAC is polyanionic cellulose, yellow is xanthan gum, field is squash gum, and thorn is locust gum.

[0022] The wet balls produced above were dried and roasted at high temperature. During the furnace temperature process, the temperature was controlled at 900°C for 20 minutes, the temperature was controlled at 1250°C for 20 minutes, and the temperature was controlled at 800°C for 20 minutes.

[0023] Table 2 The metallurgical index of pelletizing

[0024] Into a ball

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Abstract

The invention discloses an iron ore powder pellet adhesive and an application thereof. Chemical components of the iron ore powder pellet adhesive comprise polyanionic celluloses, xanthan gum, sesbania gum and locust glue. An application of the iron ore powder pellet adhesive comprises the following steps: during preparing pellets, firstly preparing a mixture which comprises the iron ore powder pellet adhesive, sodium carbonate and bentonite, and then adding 0.9-1.1% of mixture to iron concentrate powder. After the components are mixed, the components can react with each other by using the synergistic effect of high-viscosity water-soluble macromolecules, so that the viscosity and the consistency are improved, the overall binding power is increased, and the overall using amount of the adhesive in the iron ore powder is reduced. The good pelleting index can be obtained under the condition that the adhesive only accounts for 0.009%-0.011% of the iron ore powder.

Description

technical field [0001] The invention relates to the field of mineral processing, in particular to an iron ore powder pellet binder and its application. Background technique [0002] Iron pelletizing is a method of fine-grained iron concentrate developed in the early 20th century. It is the result of the depletion of rich ore resources and the massive development and utilization of lean ore resources. With the almost harsh requirements on the concentrate of modern blast furnace ironmaking and the rise of short iron and steel process, the role of pellets in the iron and steel industry has become an indispensable high-quality metallurgical charge. Bentonite is used as a binder in the production of pellets. It has the advantages of good ball forming performance and sufficient resources, and has been widely used. But bentonite SiO 2 , Al 2 o 3 If the content is high, if the proportion of bentonite is too large, the iron grade of the pellets will be reduced, the amount of sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244
Inventor 姜效军李瑞芬赵通林黄伊峰
Owner UNIV OF SCI & TECH LIAONING
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