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Titanium-containing magnesium fluxed pellet and manufacturing method thereof

A fluxing and pelletizing technology, which is applied in the field of titanium-containing magnesia fluxing pellets and its manufacturing, to achieve the effects of solving roasting and bonding and improving metallurgical properties

Active Publication Date: 2021-06-18
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention provides a titanium-containing magnesia flux pellet and a manufacturing method thereof. The titanium-containing magnesia flux pellet is a double-basicity pellet, which not only has the advantages of high-basicity sintered ore, but also has the advantages of spherical The advantages of pellets; on the one hand, it solves the problem of flux-based pellets roasting and bonding, improves the metallurgical properties of pellets, and on the other hand, makes pellets have the role of titanium slag furnace protection

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  • Titanium-containing magnesium fluxed pellet and manufacturing method thereof

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Embodiment 1

[0045] In this embodiment, the high-basicity sintered ore return is used as the pelletizing core to produce titanium-containing magnesium flux pellets with inner and outer layers and double alkalinity. The manufacturing process is as follows:

[0046] Iron concentrate, binder A and light pyroligne powder form primary mixture, wherein the mass fraction of iron concentrate powder is 95.8%; binder A is sodium carboxymethyl cellulose, and its mass fraction is 1.2%; The mass fraction of burnt magnesium powder is 3%; the mixture is made by adding quicklime to the initial mixture, and the amount of quicklime is adjusted so that the alkalinity of the mixture is 0.9; the mass fraction of MgO in the mixture is 2.1%.

[0047] The iron concentrate is composed of ilmenite concentrate A and high-iron and low-silicon iron concentrate. The mass ratio of ilmenite concentrate A to high-iron and low-silicon iron concentrate is 25:75; the total iron grade of the high-iron and low-silicon iron con...

Embodiment 2

[0053] In this embodiment, the high-basicity sintered ore return is used as the pelletizing core to produce titanium-containing magnesium flux pellets with inner and outer layers and double alkalinity. The specific manufacturing process is as follows:

[0054] Iron ore concentrate, binder A and burntite powder are used to form the initial mixture, wherein the mass fraction of iron concentrate is 93.5%; binder A is bentonite, and its mass fraction is 2%; the mass fraction of burntite powder is Fraction 4.5%; Add quicklime to the primary mixture to form a mixture, adjust the amount of quicklime added so that the alkalinity of the mixture is 1; the MgO mass fraction of the mixture is 2.4%.

[0055] The iron concentrate is composed of ilmenite concentrate A and high-iron and low-silicon iron concentrate. The mass ratio of ilmenite concentrate A to high-iron and low-silicon iron concentrate is 40:60; the total iron grade of the high-iron and low-silicon iron concentrate is 68 %, S...

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Abstract

The invention relates to a titanium-containing magnesium fluxed pellet and a manufacturing method thereof. The pelletizing core of the pellet is sintered ore return ore, the pellet body on the outer layer of the core is a mixed material layer composed of iron ore concentrate, a binder A and light-burned magnesite powder, and the outer layer of the pellet is wrapped in an anti-sticking film; the alkalinity of the return ore of the sintered ore is 1.9 to 2.2; the alkalinity of the mixed material layer is 0.8 to 1.1; the alkalinity of the pellet is 1-1.4, the mass fraction of MgO is 1.6%-2.5%, and the mass fraction of TiO2 is larger than or equal to 2%. The titanium-containing magnesium fluxed pellet is a double-alkalinity pellet, has the advantages of high-alkalinity sintered ore and also has the advantages of pellet ore; on one hand, the problem that the fluxed pellets are bonded during roasting is solved, the metallurgical performance of the pellets is improved, and on the other hand, the pellets have the effect of protecting the furnace through the titanium slag.

Description

technical field [0001] The invention relates to the technical field of sintered pellet production, in particular to a titanium-containing magnesium flux pellet and a manufacturing method thereof. Background technique [0002] Blast furnace charge structure is an important prerequisite and material basis for ironmaking production to achieve high quality, low consumption, and high yield. my country's blast furnace charge is mainly high-basicity sinter, with some pellets and lump ore added. Therefore, the pellet plant mainly produces acid pellets, which have poor metallurgical properties such as refractory dripping performance and high-temperature reduction performance. The production of self-fluxing pellets with good metallurgical properties has become the leading direction for various pellet manufacturers to improve the quality of pellets. [0003] As raw materials for blast furnace ironmaking, there are three types of pellets that have been industrially produced: acid oxidi...

Claims

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Application Information

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IPC IPC(8): C22B1/243C22B1/244C22B1/02C21B5/00
CPCC22B1/2406C22B1/244C22B1/243C22B1/02C21B5/008Y02P10/20
Inventor 张辉李志斌刘佩江夏铁玉李建军周明顺段立祥李晓春彭彬张磊刘弘礼
Owner ANGANG STEEL CO LTD
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