Method for preparing sintering ore of vanadium-titanium magnetite ore

A technology of vanadium-titanium magnetite and vanadium-titanium magnetite concentrate, which is applied in the field of vanadium smelting, can solve the problems of poor strength index of pure vanadium-titanium magnetite sinter, poor sinter particle size composition, restriction of blast furnace smelting strength, etc., and achieve improvement The effect of improving the quality of sinter, small burning loss, and improving the balling performance of raw materials

Inactive Publication Date: 2009-03-11
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the proportion of pellets increases, the amount of sintering flux increases. Since the addition of flux, especially active ash and quicklime, has a greater impact on the granulation of the mixture and the strength of sinter, the granulation effect of adding flux at one time is not goo

Method used

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  • Method for preparing sintering ore of vanadium-titanium magnetite ore
  • Method for preparing sintering ore of vanadium-titanium magnetite ore
  • Method for preparing sintering ore of vanadium-titanium magnetite ore

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The preparation of embodiment 1 vanadium-titanium magnetite pellets

[0025] The preparation of vanadium-titanium magnetite pellets adopts the method of disc pelletizing and cylinder rolling to prepare double alkalinity pellets. material.

[0026] Test raw material

[0027] The main components of each raw material adopted in the embodiment are shown in Table 2:

[0028] Table 2 Unit: weight percentage (%)

[0029] Element Vanadium Titanium Magnetite Concentrate Mineral powder C Mineral powder A Mineral powder B limestone quicklime Scorched powder TF 54.30 50.50 63.21 59.40 0.56 0.35 0.50 CaO 0.90 0.00 0.00 3.13 52.73 86.10 1.15 SiO 2 3.25 13.00 3.10 7.52 1.81 1.60 9.80 moisture 11.8 5.6 7.00 7.00 2.30 0.00 8.00

[0030] This embodiment has prepared 1 comparative example and 4 test examples, and the ratio of raw materials is all the same, as follows:

[0031] 1. 54 kg of vanadium-titanium mag...

Embodiment 2

[0040] Example 2 Preparation of sintered ore

[0041] In four sintering cups of φ250×750 mm, four kinds of pellets prepared in Example 1 were laid respectively, the particle size of the bottom material was 10-20 mm, and the thickness of the bottom material was 20 mm. The sintering conditions are: ignition time 2min, ignition negative pressure: 600mmH 2 O, sintering negative pressure: 1200mmH 2 O.

[0042] After the sinter is burnt, it is poured out, cooled naturally, dropped twice from a height of 2 meters, and sieved. The yield of +10mm particle size is calculated, and 7.5kg of 10-40mm particle size is taken for 1 / 2ISO drum, and finally used 6.3mm and 0.5mm standard sieves are screened, the +6.3mm particle size content is used to measure the drum index, and the -0.5mm particle size content is used to measure the anti-wear index.

[0043] The particle size composition, bulk specific gravity, moisture and other data of the sintered ore of the comparative example and each tes...

Embodiment 3

[0058] Example 3 Sinter lithofacies results and analysis

[0059] The lithofacies composition of Test Example 2 and comparative sinter prepared in Example 1 were detected, and the main phases and content comparison of sinter are shown in Table 7:

[0060] Table 7 Unit: %

[0061] lithofacies comparative example Test example 2 Titanium hematite 30～31 32～35 Titanium Magnetite 23～27 20～22 ferrite phase 27～30 30～32 perovskite 1.3～1.6 0.8～1.0 Titanium Garnet not seen not seen pyrrhotite not seen not seen Free CaO 0.4～0.7 0.4～0.6 glass phase 1～1.5 1.5～2 Total amount of silicate phase 10.5～15 10～12.7

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Abstract

The invention relates to a method for preparing sinters of vanadium titano-magnetite, which belongs to the technical field of vanadium melting. The method for preparing the sinters has high sintering speed and high barrate strength, and particularly comprises the following steps: a. 51 to 57 portions of concentrated vanadium titano-magnetite, 15 to 19 portions of mineral powder A, 4 to 6 portions of mineral powder B, 6 to 8 portions of mineral powder C and 4.5 to 6 portions of coke breeze are prepared into mixture; b. 4 to 6 portions of limestone, 1.5 to 5.5 portions of quicklime and 50 weight percent of the mixture in step a are uniformly mixed for pellet fabrication; c. 1.5 to 5.5 portions of the quicklime and 50 weight percent of the mixture in step a are uniformly mixed, and pellets prepared in step b are placed into the mixture and rolled for pellet fabrication; and d. the pellets prepared in step c are sintered, and the sinters of the vanadium titano-magnetite are obtained after natural cooling of the pellets. The quality of the sinters prepared is obviously improved; and the surface layer fuel speed of pelletized particles can be quickened and the solid fuel consumption can be reduced under the condition of melting in a blast furnace.

Description

technical field [0001] The invention relates to a preparation method of vanadium-titanium-magnetite sintered ore, belonging to the technical field of vanadium smelting. Background technique [0002] Alkalinity is one of the most important quality characteristics of sintered ore, which directly affects the yield and quality of sintered ore. As we all know, the basicity of sintered ore is determined according to the requirements of blast furnace smelting on the properties of slag and the requirements on the chemical composition of iron ore charge. When selecting the basicity of sinter ore, the amount of raw solvent should be reduced as much as possible, but doing so often contradicts the requirements for the quality of sinter ore. [0003] The current charge structure of the blast furnace is "high alkalinity (about 2.2) sinter + natural lump ore + acid pellets". As the proportion of pellets increases, the amount of sintering flux increases. Since the addition of flux, especi...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 林千谷何木光何斌胡洪天刘柄俊冷祥全
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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