Furnace protecting agent for titanium concentrate sintering and preparation method thereof

Abstract

The invention discloses a furnace protecting agent for titanium concentrate sintering and a preparation method thereof, wherein the furnace protecting agent is prepared from the following components in proportion by weight: titanium dioxide (TiO2), a composition (CaO+MgO+SiO2+AL2O3) and total iron (TFe), and the preparation method comprises the following steps: selecting a titanium concentrate, compounding charcoal, mixing materials, distributing the materials, molding through sintering by a sintering machine and crushing, wherein the furnace wall at the eroded position of a furnace hearth isthinned, the temperature is lower than other regions to form a temperature gradient, and Ti (C, N) and attachments thereof are continuously accumulated and bonded at an eroded region until the temperature gradient relatively disappears under the action of the temperature gradient. The invention overcomes the abuse of large energy consumption due to unstable titanium content and high impurity content in the prior art, so that titanium carbonitride TiC, TiN or Ti(C,N) as an effective component can be generated by a blast furnace at the cost of minimum coke ratio, is formed in furnace hearth molten iron and is deposited on a working surface or in a brick joint at the eroded position of the furnace hearth to repair the eroded region to perform the action of protecting the furnace hearth.

Description

Technical field: [0001] The invention relates to a blast furnace protection material, in particular to a titanium carbonitride blast furnace protection agent and a preparation method thereof. Background technique: [0002] The use of titanium-containing materials to protect the furnace is due to the reduction of TiC, TiN or Ti(C, N) and other high melting point compounds under high temperature conditions, which are deposited on the hearth bottom to form a protective layer. The furnace protection technology of titanium-containing materials has been successfully applied to blast furnaces in my country. Furnace protection agents such as vanadium-titanium ore and titanium-containing pellets have achieved good results in the practice of blast furnace longevity. It should be pointed out that at the end of the blast furnace campaign, the use of titanium-containing materials to protect the furnace is the main technical measure to prolong the life of the blast furnace. At present, b...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: 1) only part of titanium dioxide forms titanium carbonitride (Ti(C, N)) to protect the furnace, and the rest enters the slag, resulting in waste of titanium dioxide

2) The increase of the amount of slag will inevitably consume the corresponding coke energy. In order to balance the ash content in this part of the coke, the flux must be consumed, and it is a vicious circle

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