Method for preparing sintered ore by sintering ilmenite concentrate

A technology of ilmenite concentrate and vanadium-titanium iron concentrate, which is applied in the field of metallurgy, can solve the problems of less liquid phase formation, low sinter strength, and poor pulverization, so as to improve strength and pulverization performance, and optimize operating parameters Effect

Active Publication Date: 2017-01-04
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the sintering process of ilmenite concentrate powder, brittle perovskite is generated, resulting in less liquid phase formation, low sinter strength and poor pulverization

Method used

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  • Method for preparing sintered ore by sintering ilmenite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare raw materials, wherein by weight percentage, ilmenite concentrate accounts for 40%, vanadium-titanium iron concentrate accounts for 35%, iron ore powder accounts for 5%, flux accounts for 15%, and fuel accounts for 5%;

[0031] Add water to all raw materials and put them into a mixer for mixing. The amount of water added is 5% of the total weight of all raw materials. After mixing evenly, a material to be sintered with a particle size of 3-5mm is obtained;

[0032] After distributing the material to be sintered in the sintering machine, sintering is carried out on the sintering machine with ignition and ventilation; the sintering ignition temperature is 1050°C, and the ignition negative pressure is 6KPa. The negative pressure is 11KPa;

[0033] When the temperature of the sintering waste gas drops to ≤100°C, the sintered material is taken out, crushed and sieved to obtain a sintered ore with a drum index of 70% and a reducing pulverization index of 50%.

Embodiment 2

[0035] Method is with embodiment 1, and difference is:

[0036] (1) Raw materials, of which ilmenite concentrate accounts for 70% by weight, vanadium-titanium iron concentrate accounts for 5%, iron ore powder accounts for 13%, flux accounts for 8%, and fuel accounts for 4%;

[0037] (2) The amount of water added is 3% of the total weight of all raw materials;

[0038] (3) The sintering ignition temperature is 1150°C, the ignition negative pressure is 5KPa, the sintering is completed when the temperature of the sintering exhaust gas begins to drop, the sintering end temperature is 400°C, and the sintering negative pressure is 12KPa;

[0039] (4) The drum index of sinter is 60%, and the reducing pulverization index is 65%.

Embodiment 3

[0041] Method is with embodiment 1, and difference is:

[0042] (1) Raw materials, of which 45% by weight of ilmenite concentrate, 25% of vanadium-titanium iron concentrate, 15% of iron ore powder, 10.5% of flux, and 4.5% of fuel;

[0043] (2) The amount of water added is 4% of the total weight of all raw materials;

[0044] (3) The sintering ignition temperature is 1250°C, and the ignition negative pressure is 5KPa. When the sintering waste gas temperature begins to drop, the sintering is completed. The sintering end temperature is 450°C, and the sintering negative pressure is 11KPa;

[0045] (4) The drum index of sinter is 65%, and the reduction pulverization index is 60%.

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Abstract

The invention discloses a method for preparing sinter by sintering titanium-iron concentrate, belonging to the field of metallurgical technology. The method comprises the following steps: (1) preparing raw materials in percentage by weight: 40-70% of titanium-iron concentrate, 5-35% of vanadium-titanium-iron concentrate, 5-15% of iron ore powder, 8-15% of flux and 4-5% of fuel; (2) adding water and mixing to obtain a material to be sintered with particle size of 3-5mm; (3) distributing the materials in a sintering machine and igniting and performing down draft sintering; and (4) when the temperature of the sintering waste gas is reduced to be lower than or equal to 100 DEG C, taking out the sintered materials and breaking and screening out a part with particle size of 5-40mm. According to the method disclosed by the invention, based on the physicochemical characteristics of fine titanium-iron powder, the strength and powdering performance of the sinter are improved by intensifying the smelting measures and optimizing the operation parameters, the high-quality and low-cost sinter is supplied to a blast furnace, and necessary guarantee is provided for blast furnace smelting.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for preparing sintered ore by sintering ilmenite concentrate. Background technique [0002] The ilmenite reserves in the Chengde area of ​​my country are quite rich, and it is one of the main mineral resources in the world's titanium resources. After the raw ilmenite ore is beneficiated, ilmenite concentrates with high titanium dioxide content and ilmenite concentrates with high iron content are obtained. Ilmenite concentrate can be used as a raw material for producing titanium dioxide, etc. Ilmenite concentrate contains high iron, vanadium, and titanium components, and also has high comprehensive utilization value. [0003] Since the cost of raw materials accounts for 80% of the total cost of sintered ore during the sintering production process of vanadium-titanium magnetite, the use of cheap ilmenite concentrate powder can start from the source and greatly reduce th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/22
CPCC22B1/22
Inventor 薛向欣姜涛杨松陶周密段培宁
Owner NORTHEASTERN UNIV LIAONING
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