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Preparation method of modified titanium concentrates

A titanium concentrate and modification technology, which is applied in the field of preparation of modified titanium concentrate, can solve the problems of increased binder ratio, increased pelletizing cost, and poor pelletizing effect, and achieves increased reactivity and shorter smelting time. The effect of shortening and good promotion and application prospect

Active Publication Date: 2018-04-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
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  • Claims
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Problems solved by technology

[0005] Preliminary pelletizing tests show that due to the low specific gravity and residual flotation agent of titanium concentrate, the ballizing effect is not good, the proportion of binder increases, and the cost of pelletizing increases.

Method used

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  • Preparation method of modified titanium concentrates
  • Preparation method of modified titanium concentrates
  • Preparation method of modified titanium concentrates

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preparation example Construction

[0024] Concretely, a kind of preparation method of modified titanium concentrate, the method comprises the following steps:

[0025] a. Oxidation: Oxidize the titanium concentrate, control the oxidation rate of the titanium concentrate to not less than 90%, and obtain the oxidized titanium concentrate;

[0026] b. Reduction: enter the oxidized titanium concentrate into the reduction process, control the oxidation rate of the titanium concentrate at 30% to 50%, and obtain the reduced titanium concentrate;

[0027] c. Classification: classify the reduced ilmenite concentrate to obtain a coarse-grained ilmenite concentrate with a particle size of +200 mesh ≥ 90%, and a fine-grained ilmenite concentrate with a particle size of -200 mesh ≥ 90%. The coarse-grained titanium concentrate is modified titanium concentrate A;

[0028] d. Pelletizing: pelletize the fine-grained titanium concentrate, and control the particle size of the pellets to 10-20mm to obtain modified titanium concen...

Embodiment 1

[0055] In this embodiment, the PTK10 titanium concentrate produced by Panzhihua Iron and Steel Co., Ltd. is used as the initial titanium concentrate, and the preparation method of the modified titanium concentrate is as follows:

[0056] a. Oxidation: Use a fluidized device to oxidize titanium concentrate, use gas as the main heat source, and use air as the oxidation atmosphere. The flow rate of the oxidation atmosphere is 0.2m / s, the oxidation temperature is about 1100°C, and the oxidation time is 2h. After oxidation, the oxidation rate of titanium concentrate is controlled above 95%;

[0057] b. Reduction: directly hot charge the oxidized titanium concentrate into the fluidized reduction equipment, use carbon monoxide as the reducing gas, the flow rate of the reducing gas is 0.18m / s, the reduction temperature is 950°C, the reduction time is 2h, the reduced titanium concentrate The ore oxidation rate is controlled at about 40%;

[0058] c. Classification: Classify the reduce...

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Abstract

The invention discloses a preparation method of modified titanium concentrates, and belongs to the technical field of titanium slag smelting. The preparation method of the modified titanium concentrates comprises the following steps: (a) oxidation: the oxidation rate of titanium concentrates is controlled to be not lower than 90%; (b) reduction: the oxidation rate of the reduced titanium concentrates is controlled within 30-50%; (c) classification: thick-particle titanium concentrates with particle sizes of +200 meshes not less than 90% and fine-particle titanium concentrates with particle sizes of -200 meshes not less than 90% are obtained; and the thick-particle titanium concentrates are modified titanium concentrates A; and (d) granulation: the fine-particle titanium concentrates are granulated; the particle sizes of pellets are controlled within 10-20 mm; modified titanium concentrates B are obtained; and the modified titanium concentrates are ones of the modified titanium concentrates A and the modified titanium concentrates B. The modified titanium concentrates are used as titanium slag smelting raw materials, so that the smelting electric consumption and the smelting time can be effectively reduced, meanwhile, the granulation conditions are improved, reasonable utilization of the fine-particle titanium concentrates is realized, the energy saving and cost reducing effectsare obvious, and excellent home and abroad popularization and application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium slag smelting, and in particular relates to a preparation method of modified titanium concentrate. Background technique [0002] Although my country is rich in titanium ore resources, the amount of resources is mainly rocky ilmenite that has not been favored by international counterparts. This type of mineral has complex components, low TiO2 grade, and difficult mining. [0003] The Panzhihua area is the largest titanium concentrate producing area in my country, accounting for 46% of the total domestic output. The titanium concentrate is vanadium-titanium magnetite, which has low grade, high impurity content, low smelting reduction activity, and high power consumption. In recent years, in order to further increase the yield of titanium selection, the particle size of titanium concentrate has become finer and finer, which further increases the difficulty of smelting titanium slag with it, the smel...

Claims

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Application Information

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IPC IPC(8): C22B34/12
CPCC22B34/1209
Inventor 肖军叶恩东韩可喜
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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