Method for smelting medium titanium slag by blast furnace

A technology for blast furnace smelting and titanium slag, which is applied to the field of titanium slag in blast furnace smelting, can solve the problems of large slag volume, high iron loss, difficult slag treatment, etc., and achieves the effects of reducing consumption, reducing sintered powder and increasing output

Inactive Publication Date: 2009-07-08
攀钢集团成都钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the smelting methods of various enterprises are quite different, but most of them have difficulties such as large amount of slag, difficult slag treatment, and high iron loss.

Method used

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  • Method for smelting medium titanium slag by blast furnace

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preparation example Construction

[0017] 1. Preparation of low vanadium titanium sinter:

[0018] Mixture ingredients: 20-30% of vanadium-titanium iron concentrate powder, 15-25% of domestic common mineral powder, 15-25% of ordinary concentrate powder, 3-5% of rolled steel skin, 20-40% of imported mineral powder and other Iron industry waste. The air volume of the sintering machine of 30 square meters is 2400-2500 cubic meters per minute, and the air volume of the sintering machine of 105 square meters is 9000-10000 cubic meters per minute; the added water is about 6% of the weight of the mixture; the fixed carbon in the mixture is controlled at about 2.8%. Low vanadium titanium sinter finished product contains SiO 2 5% to 7%, the basicity of sintered ore is 2.20 to 2.70.

[0019] The main chemical composition of raw materials is shown in Table 2:

[0020] Table 2 Chemical Composition of Raw Materials Unit: % by weight, %

[0021] name TF FeO SiO 2 CaO TiO 2 Vanadium Titanium Iro...

Embodiment 1

[0028] Example 1 Preparation of low vanadium titanium sinter

[0029] 25% of vanadium and titanium fine powder, and the remaining raw materials are 30% of domestic general powder, 15% of ordinary fine powder, 5% of rolled steel skin, 22% of imported powder, and 3% of other iron-containing industrial waste.

[0030] Sintering characteristics of vanadium-titanium ore: the air volume of 30 square meters sintering machine is 2450 cubic meters per minute, and the air volume of 105 sintering machine is 9500 cubic meters per minute; the moisture is 6%; the fixed carbon of the mixture is 2.8%.

[0031] Low vanadium titanium sinter finished product contains SiO 2 6%, sinter basicity 2.40, sinter TiO 2 2.6%.

Embodiment 2

[0032] Embodiment 2 Preparation of all-vanadium-titanium pellets

[0033] The whole vanadium ilmenite concentrate and high-efficiency bentonite are automatically batched by the electronic belt scale according to the ratio of 98.6:1.4, and then transported by the belt into the drum drying mixer for mixing, dehydration, and mixing after mixing and dehydration. The moisture content of the material is about 5%, and then it is sent to the moistening mill for internal moistening, and then enters the disc pelletizer (the size of the disc pelletizer is Φ6000×700mm (side height), the speed is 8r / min, and the inclination angle is 46.5mm 0 ) to make pellets, and the way of adding water is to add the upper and lower parts of the pelletizing disc at the same time to obtain raw pellets. After the green balls are screened by the sieving machine, the raw balls with a diameter of 8-16 mm are evenly distributed on the drying bed of the shaft furnace by the distribution machine. The temperature ...

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Abstract

The invention belongs to the field of middle titanium slag melting technology, specifically to a middle titanium slag blast furnace smelting method. The technical problems the invention object to resolve is to provide a middle titanium slag melting method in a medium-sized blast furnace, the method can have a better use of schreyerite resources to perform middle titanium slag melting, specifically adopting 25 - 30 parts of all-vanadium-titanium pellet ore, 65 - 70 parts of low-vanadium-titanium magnetite ore and 5 - 10 parts of lump ore as raw materials for smelting in blast furnace. Obtained cast iron satisfies the quality requirements for further steelmaking, the furnace cinder dyadic alkalinity is 1.15 - 1.30, and can be used raw material of the composite powder. The method of the invention uses an appropriate charging stock structure in the blast furnace to reduce the sintering powder and to improve the air permeability, and makes full use of high cost-effective of schreyerite to effectively reduce production costs.

Description

technical field [0001] The invention belongs to the technical field of medium titanium slag smelting, in particular to a method for blast furnace smelting medium titanium slag. Background technique [0002] The quality and stability of raw materials required for smelting high-titanium slag are high, so the demand for vanadium-titanium ore resources is huge, and the smelting process is difficult, and the probability of accidents and the difficulty of handling accidents are also relatively high. Due to the uneven distribution of vanadium-titanium ore resources and the low output of high-quality ore, only a few domestic enterprises can smelt high-titanium slag for a long time. For most iron and steel enterprises with poor ore resources and low comprehensive furnace grades, it is of general practical significance to properly use part of vanadium-titanium ore resources for "medium-titanium slag smelting". [0003] The ore for medium titanium slag smelting usually contains TiO 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 黄爱平范儒海秦舜刘海张岳张子祥袁强陈琦陈少军任宏杉杨智罗绍成张成勇程昌燕高勇
Owner 攀钢集团成都钢铁有限责任公司
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