Preparation method of vanadium-titanium iron ore concentrate magnetized pellet

A technology of vanadium-titanium-iron concentrate and pellets, which is applied in the field of preparation of vanadium-titanium-iron concentrate magnetized pellets, can solve the problems that the reduction process of blast furnace and shaft furnace can not be carried out normally, and achieve improved desulfurization effect, simple process steps, Eliminates the effect of catastrophic inflation

Active Publication Date: 2013-10-09
云霄县食品快检中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some are normal expansion, some are abnormal expansion, and some are catastrophic expansion, so that the reduction process of blast furnace and shaft furnace cannot be carried out normally

Method used

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  • Preparation method of vanadium-titanium iron ore concentrate magnetized pellet

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preparation example Construction

[0032] The preparation method of the vanadium-titanium-iron concentrate magnetized pellets provided by the embodiment of the present invention comprises:

[0033] Step S101: mixing materials;

[0034] The materials are mixed evenly, and the weight ratio of the materials is:

[0035] Vanadium-titanium iron ore concentrate powder: carbonaceous reducing agent: binder: additive: water = 100: (1-4): (2-9): (1-3): (5-8).

[0036] Step S102: making pellets;

[0037] Pelletizing the mixed materials to obtain green pellets, specifically, the pelletizing equipment can be a pressure molding machine, the molding pressure is 8-20MPa, the particle size of the green pellets is 15mm-30mm, the green pellets It is ellipsoidal or pillow-shaped, and the particle size of the green pellets refers to the largest radial dimension of the green pellets.

[0038] Step S103: drying;

[0039] The green pellets are dried, and the green pellets can be dried in a blast drying oven. The drying temperature...

Embodiment 1

[0048] Mix vanadium-titanium iron ore concentrate powder, carbonaceous reducing agent, binder, additives, and water according to the following weight ratio: vanadium-titanium-iron ore concentrate powder: carbonaceous reducing agent: (organic binder + bentonite): Additives: water=100:1:(1+6):1:6; the particle size of vanadium-titanium iron concentrate is -200 mesh, accounting for 58%, the organic binder is PVA, and the additive is B-containing 2 o 3It is 8% ferroboron concentrate. The mixture was pressed into a flat spherical shape on a pressure molding machine with a pressure of 15 MPa and a maximum radial dimension of the pellets of 20 mm. The green pellets were dried in a blast drying oven at a drying temperature of 150°C and a drying time of 60 minutes. The calcination temperature is 1200° C., and the calcination time is 60 minutes to obtain magnetized pellets, which are cooled under nitrogen protection. After testing, the magnetic susceptibility of the obtained magnetiz...

Embodiment 2

[0050] Mix vanadium-titanium iron ore concentrate powder, carbonaceous reducing agent, binder, additives, and water according to the following weight ratio: vanadium-titanium-iron ore concentrate powder: carbonaceous reducing agent: (organic binder + bentonite): Additives: water=100:2:(2+4):3:6; the particle size of vanadium-titanium iron concentrate is -200 mesh, accounting for 58%, the organic binder is PVA, and the additive is B-containing 2 o 3 It is 5% ferroboron concentrate. The mixture was pressed into a flat spherical shape on a pressure molding machine with a pressure of 12 MPa and a maximum radial dimension of the pellets of 20 mm. The green pellets were dried in a blast drying oven at a drying temperature of 250°C and a drying time of 40 minutes. The calcination temperature is 1150° C., and the calcination time is 80 minutes to obtain magnetized pellets, which are cooled under nitrogen protection. After testing, the magnetic susceptibility of the obtained magneti...

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Abstract

The invention discloses a preparation method of a vanadium-titanium iron ore concentrate magnetized pellet. The preparation method comprises steps of a, mixing materials, namely, uniformly mixing the materials, wherein a weight proportion of vanadium-titanium iron ore concentrate powdery to a carbonaceous reducing agent to an adhesive to an additive to water in the materials is 100: (1-4): (2-9): (1-3): (5-8); b, pelletizing, namely, pelletizing the uniformly mixed materials to obtain a green pellet; c, drying, namely, drying the green pellet; d, magnetizing and baking, namely, magnetizing and baking the dried green pellet at 950-1200 DEG C to obtain a magnetized pellet; and e, protecting and cooling, namely, implementing protective cooling or hot charging on the magnetized pellet in a reducing furnace. The preparation method is simple in steps, less in required equipment, and capable of meeting demand of industrial production. According to the pellet prepared by the method, catastrophic expansion of the vanadium-titanium iron ore concentrate pellet can be effectively eliminated, the effects of preventing pulverization and bonding as well as enhancing a desulfurization effect are achieved, and demands of shaft furnace and blast furnace smelting are met.

Description

technical field [0001] The invention relates to the technical field of pellet preparation technology, in particular to a method for preparing magnetized pellets of vanadium-titanium-iron concentrate. Background technique [0002] Panzhihua vanadium-titanium magnetite is a compound ore mainly containing titanium, iron, vanadium and a small amount of chromium, nickel, cobalt, platinum group, gallium, scandium and other elements. The reserves of vanadium-titanium magnetite in Panxi area are more than 20 billion tons, accounting for more than 30% of the national iron ore reserves. Among them, the reserves of titanium resources are 870 million tons, accounting for 90.5% of the national reserves of titanium resources and 35.2% of the world's titanium reserves. In addition, there are 900,000 tons of cobalt, 700,000 tons of nickel, 250,000 tons of scandium, 180,000 tons of gallium, and a large amount of chromium, copper, sulfur and other resources. [0003] Vanadium-titanium magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 马兰徐镜平杨辉张家志王双燕
Owner 云霄县食品快检中心
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