Lining of vanadium ferroalloy smelting furnace and preparation method thereof

A ferro-vanadium alloy and smelting furnace technology, which is applied in furnaces, lining repairs, furnace components, etc., can solve problems such as high magnesium oxide content, low smelting yield, and environmental protection, and achieve strong adhesion, improve smelting yield, The effect of reducing the content

Active Publication Date: 2022-05-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing problems in the prior art, such as poor effect and non-environmental protection caused by the use of magnesium chloride binder in the furnace lining preparation process, as well as problems such as too high magnesium oxide content in the smelting slag and low smelting yield, and to provide a Ferro-vanadium alloy smelting furnace lining and preparation method thereof

Method used

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Examples

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preparation example Construction

[0027] One aspect of the present invention provides a method for preparing a lining of a ferrovanadium alloy smelting furnace, the method comprising the following steps:

[0028] (1) mixing inorganic binder and organic binder to obtain composite binder;

[0029] (2) the composite binder obtained in step (1) is mixed with magnesia, and then water is added to stir to obtain wet beat material;

[0030] (3) injecting the wet material into the tire mold to form a knot, then removing the tire mold, spraying a liquid binder on the surface in contact with the tire mold, then drying, and then carrying out oxygen-enriched baking to obtain a ferrovanadium alloy smelting furnace furnace lining;

[0031] Wherein, in step (1), based on the total weight of the inorganic binder and the organic binder as 100%, the amount of the inorganic binder is 70-90% by weight, and the organic binder The dosage is 10-30% by weight;

[0032] In step (2), the amount of the composite binder is 2-20% by wei...

Embodiment 1

[0052] (1) Mixing the inorganic binder (hydrated alumina) and the organic binder (carboxymethyl cellulose) to obtain a composite binder; wherein, the total amount of the inorganic binder and the organic binder is Based on 100% by weight, the amount of the inorganic binder is 90% by weight, and the amount of the organic binder is 10% by weight;

[0053] (2) combining the composite binder obtained in step (1) with metallurgical grade magnesia (the magnesia contains 50% by weight of fine grade magnesia, 30% by weight of medium grade magnesia and 20% by weight of coarse magnesia The particle size of the fine-grained magnesia is less than 0.074 mm, the particle size of the medium-sized magnesia is 0.074 mm to 1.18 mm, and the particle size of the coarse-grained magnesia is diameter is 1.40mm~2.36mm) mixing, control the composite binder weight to account for 11% of the magnesia weight, then add water and stir to obtain a wet material with a water content of 6% by weight;

[0054] (...

Embodiment 2

[0056] (1) Inorganic binder (the inorganic binder contains 50% of colloidal alumina, 25% of magnesium citrate and 25% of magnesium stearate) and organic binder (pregelatinized starch) to obtain a composite binder; wherein, based on the total weight of the inorganic binder and the organic binder being 100%, the amount of the inorganic binder is 90% by weight, and the organic binder is 90% by weight. The dosage of the binder is 10% by weight;

[0057] (2) combining the composite binder obtained in step (1) with fused magnesia (the magnesia contains 60% by weight of fine-grade magnesia, 20% by weight of medium-grade magnesia and 20% by weight of coarse magnesia The particle size of the fine-grained magnesia is less than 0.074 mm, the particle size of the medium-sized magnesia is 0.074 mm to 1.18 mm, and the particle size of the coarse-grained magnesia is diameter is 1.40mm~2.36mm) mixing, control the composite binder weight to account for 20% of the weight of magnesia, then add ...

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Abstract

The invention relates to the technical field of vanadium-iron furnace knotting, and discloses a vanadium-iron alloy smelting furnace lining and a preparation method thereof. The method comprises: (1) mixing an inorganic binder and an organic binder to obtain a composite binder; (2) mixing the composite binder obtained in step (1) with magnesia, and then adding water and stirring to obtain Wet beating material; (3) injecting the wet beating material into the mold to form a knot, then removing the mold, spraying a liquid binder on the surface in contact with the mold, then drying, and then performing oxygen-enriched baking to obtain Vanadium ferroalloy smelting furnace lining. This method uses a new type of environmentally friendly chlorine-free composite binder, which has the characteristics of strong adhesion, safety, environmental protection and high efficiency. The baking process will not produce hydrogen chloride gas and acid mist, making the furnace lining wet knotting-after baking is stronger. and dense, eliminating the preparation link of boiling magnesium chloride-containing brine at high temperature on site, increasing the smelting yield, and reducing the content of magnesium oxide in the smelting slag.

Description

technical field [0001] The invention relates to the technical field of knotting of ferrovanadium furnaces, in particular to a lining of a ferrovanadium alloy smelting furnace and a preparation method thereof. Background technique [0002] The reduction product of vanadium ferroalloy in the smelting process is aluminum oxide. In order to reduce the melting point and viscosity of the slag to fully recover the vanadium element in the slag, a large amount of calcium oxide is added in the smelting process to make slag. When the strength of magnesia lining material is not enough, erosion and consumption at high temperature will lead to high magnesia content in the slag, and at the same time, it will also cause a large amount of vanadium oxide and vanadium alloy to penetrate into the refractory material. Therefore, improving the lining material is also one of the key points to improve the yield of vanadium smelting. [0003] Patent application 201610323085.6 discloses a knotting m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043F27D1/16
CPCC04B35/043F27D1/1626C04B2235/3217C04B2235/449C04B2235/6583C04B2235/77C04B2235/96
Inventor 叶明峰黄云余彬景涵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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