Acidic full-vanadium-titanium pellets and preparation method thereof

A technology of pelletizing and vanadium-titanium magnetite concentrate, which is applied in the field of metallurgy to achieve the effects of wide application range, reduced coke ratio, and improved technical and economic indicators

Inactive Publication Date: 2011-10-19
PANZHIHUA IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in the preparation of existing pellets, to provide an acidic all-vanadium-titanium pellet and to use high-titanium vanadium-titanium magnetite concentrate as raw material, that is, to use a single all-vanadium-titanium Method for producing acidic all-vanadium-titanium pellets from magnetite concentrate

Method used

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  • Acidic full-vanadium-titanium pellets and preparation method thereof
  • Acidic full-vanadium-titanium pellets and preparation method thereof
  • Acidic full-vanadium-titanium pellets and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0015] The preparation method of the acidic all-vanadium-titanium pellets of the present invention comprises the following steps: batching, mixing, drying, moistening, grinding, pelletizing, drying, preheating, roasting, cooling, and sieving; after sieving, blast furnace smelting can be carried out.

[0016] The pellet raw material of the present invention is mainly composed of all-vanadium-titanium magnetite concentrate, and the ratio can be as high as 100%, and a small amount of binder such as bentonite is added to pelletize and roast to prepare finished pellets. The composition content of the used all-vanadium titanium magnetite concentrate is calculated as: Fe 2 o 3 : 40-50%, FeO: 29-33%, SiO 2 : 2.5-4.5%, CaO: 1.5-2.2%, MgO: 2.0-3.2%, Al 2 o 3 : 3.0-4.5%, V 2 o 5 : 0.55-0.65%, TiO 2 : 10-15%, S: 0.4-0.6%, P0.001-0.003%, of which TFe: 52-58%, TFe is Fe in ore 2 o 3 The total amount of iron element with FeO.

[0017] The unique design concept of the present inventi...

Embodiment 1

[0025] This example was prepared in the laboratory. In order to compare with the existing pellets of vanadium-titanium magnetite concentrate + ordinary concentrate, two experiments were carried out in this embodiment, and the binder used was bentonite. Table 1 is the raw material composition of the used vanadium-titanium magnetite concentrate, wherein, V 2 o 5 0.65%, TiO 2 was 11.16%.

[0026] Table 1 raw material composition (%)

[0027] raw material name

TF

Fe 2 o 3

FeO

SiO 2

CaO

MgO

Al 2 o 3

S

P

Ordinary concentrate

63.25

61.38

26.12

5.47

1.23

0.90

1.00

0.324

0.035

Vanadium Titanium Magnetite Concentrate

55.56

46.39

29.72

3.35

1.92

2.56

3.31

0.441

0.002

[0028] Table 2 Ingredients scheme (%)

[0029]

[0030] Take 5 kg of vanadium-titanium magnetite concentrate raw material according to the above-men...

Embodiment 2

[0036] This embodiment is the acidic all-vanadium-titanium pellets produced in actual industry. The composition of the vanadium-titanium magnetite concentrate used is shown in Table 4.

[0037] Table 4 raw material composition (%)

[0038] raw material name

TF

Fe 2 o 3

FeO

SiO 2

CaO

MgO

Al 2 o 3

V 2 o 5

TiO 2

S

P

Vanadium Titanium Magnetite Concentrate

56.5

48.5

31

2.55

1.55

2.84

3.65

0.65

10.5

0.41

0.001

[0039] The main equipment is a grate machine-rotary kiln, which produces qualified pellets through batching, mixing, pelletizing, preheating-roasting and other processes.

[0040] A, the proportioning of the all-vanadium-titanium magnetite concentrate of the above-mentioned table 2 content is 100%, is mixed and dried with 1.5% external bentonite, the moisture of the dry mixture is 6.5%, and its natural alkalinity is detected to be 0.26...

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Abstract

The invention discloses a preparation method for acidic full-vanadium-titanium pellets using high-titanium vanadium-titanium magnetite. The method comprises the following steps of: proportioning, mixing, drying, wet-milling, pelletizing, drying, preheating, baking, cooling, screening and like. The raw materials for the pellets provided by the invention mainly comprise full-vanadium-titanium magnetite concentrate, the ratio of which can be up to 100%, a small amount of a binder is mixed for pelletizing and baking is carried out to prepare the finished product pellets. Using the method provided by the invention to prepare the acidic full-vanadium-titanium pellets has wide range of raw materials, especially solves the difficulty in the pellet manufacture from vanadium-titanium magnetite concentrate and lowers the manufacture cost of the pellets by using single full-vanadium-titanium magnetite concentrate to process pellets, and the technical and economic indexes such as utilization coefficient and coke ratio of the blast furnace using the acidic full-vanadium-titanium pellets for smelting are improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an acidic all-vanadium-titanium pellet and a method for preparing the acidic all-vanadium-titanium pellet by using high-titanium full-vanadium-titanium magnetite concentrate. Background technique [0002] Pellets have good mechanical strength and metallurgical properties, and have become an important high-quality metallurgical charge. At present, the more commonly used charge structure is "high alkalinity sinter + acidic oxidation pellets". Industrial tests have shown that with the increase of the proportion of pellets, the alkalinity of sintered ore is correspondingly increased to 2.4-2.5. The sinter production shows that when the sinter basicity exceeds 2.4, the sinter finished product has a finer grain size and lower strength, which has a great impact on blast furnace smelting. Therefore, the basicity requirements for acid pellets are strictly limited, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243
Inventor 蒋大均何木光杜斯宏宋剑林千谷雷电向绍红
Owner PANZHIHUA IRON AND STEEL
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