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Medium-titanium high-strength sintered ore and preparation method thereof

A sinter and high-strength technology, which is applied in the field of medium-titanium high-strength sinter and its preparation, can solve the problems of poor strength, high return rate of medium-titanium sinter, and low yield, so as to improve the granulation performance Effect

Inactive Publication Date: 2015-04-29
HEBEI IRON AND STEEL
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Problems solved by technology

[0004] The above factors lead to low SiO 2 content, high TiO 2 The medium-titanium sinter produced with high vanadium-titanium magnetite concentrate as the main raw material has a high return rate, low yield, and poor strength. The drum index is generally only about 73% to 75%, which also leads to the utilization factor per unit area of ​​the sintering machine. lower

Method used

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  • Medium-titanium high-strength sintered ore and preparation method thereof
  • Medium-titanium high-strength sintered ore and preparation method thereof

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Embodiment 1～3

[0029] Examples 1 to 3: The medium-titanium-type high-strength sinter adopts the following preparation process.

[0030] The medium-titanium-type high-strength sintered ore is produced by the above method. The specific implementation is described as follows: Table 1 shows the particle size of the raw materials in the embodiment, Table 2 shows the raw material ratio of the embodiment, and Table 3 shows the process parameters and technical and economic indicators of the embodiment.

[0031] Table 1: Example raw material particle size (wt%)

[0032]

[0033] Table 2: Examples of raw material ratio (wt%)

[0034]

[0035] Table 3: Example process parameters and technical and economic indicators

[0036] .

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Abstract

The invention discloses a medium-titanium high-strength sintered ore which is formed by sintering the following ingredients by weight percentage: 78-86% of iron-bearing material, 9-12% of quicklime, 1-4% of lightly fired dolomite and 4-6% of fuel, wherein the iron-bearing material comprises the following components by weight percentage: 40-50% of vanadium titanium magnetite concentrate, 5-20% of common fine iron powder, 25-40% of coarse ore powder and 0-8% of miscellaneous material. The sintered ore is produced by taking a vanadium titanium magnetite and the vanadium titanium magnetite concentrate as main raw materials; the pelletizing performance of a mixture is improved by reasonably preparing and adding other iron ore powder and fluxes; component and phase composition of the sintered ore is controlled; an influence of higher TiO2 content in the sintered ore on the quality of the sintered ore is reduced; a tumbler index of the sintered ore reaches above 77% when the medium-titanium sintered ore is produced; the sintered ore is high in cold strength and low in return rate; and the sintered ore is smelted via a blast furnace, so that a fuel ratio is reduced and a utilization coefficient is increased.

Description

Technical field [0001] The invention relates to a technology for agglomeration of vanadium-titanium magnetite concentrate sinter, in particular to a medium-titanium type high-strength sinter and a preparation method thereof. Background technique [0002] Vanadium-titanium magnetite is a kind of multi-metal element composite ore, which is a magnetite containing iron, vanadium, and titanium as the main multi-metal element symbiosis. Vanadium-titanium magnetite is generally SiO 2 Low content, TiO 2 The content is higher. Vanadium titanium magnetite concentrate in Chengde area, low silicon (SiO 2 The content is about 3.4wt%), containing vanadium (V 2 O 5 Content 0.3~0.6wt%), containing titanium (TiO 2 Content 2.0~4.0wt%), poor water absorption, difficult for sintering production. [0003] Because the SiO in this vanadium-titanium magnetite concentrate 2 The content is low, and the amount of liquid phase produced during sintering is insufficient. The content of ordinary silicate binder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 李鹏隋孝利陈树军董志民赵思强徐桂芬
Owner HEBEI IRON AND STEEL
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