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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

A method for preparing sinter by sintering ilmenite concentrate, which belongs to the field of metallurgical technology and is carried out according to the following steps: (1) Prepare raw materials, in which the ilmenite concentrate accounts for 40 to 70% by weight, and the vanadium ilmenite concentrate accounts for 5 ~35%, iron ore powder accounts for 5~15%, flux accounts for 8~15%, and fuel accounts for 4~5%; (2) Add water and mix to obtain the material to be sintered with a particle size of 3~5mm; (3) In the sintering machine After spreading, ignite and exhaust sintering; (4) When the temperature of the sintering exhaust gas drops to ≤100°C, take out the sintered material, crush and screen out the part with a particle size of 5~40mm. The method of the present invention aims at the physical and chemical properties of ferro-titanium powder, strengthens smelting measures, optimizes operating parameters, improves the strength and powdering performance of sinter, provides high-quality and low-cost sinter for blast furnaces, and provides the necessary requirements for blast furnace smelting. guarantee.

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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