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Method for co-producing ferrovanadium and calcium aluminate cement

A technology of calcium aluminate cement and ferrovanadium, which is applied in the direction of cement production, etc., can solve the problems of restricting the application of high added value and the fluctuation of magnesium oxide content, so as to improve the added value of utilization, reduce the melting point, and reduce the loss of vanadium Effect

Active Publication Date: 2020-01-10
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

Although ferrovanadium slag can be used as a refractory raw material, the content of magnesium oxide in it fluctuates greatly, and at the same time, it has hydration, which limits its high value-added application.

Method used

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  • Method for co-producing ferrovanadium and calcium aluminate cement
  • Method for co-producing ferrovanadium and calcium aluminate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) After mixing the fused corundum aggregate of 65 parts by weight, the corundum fine powder of 20 parts by weight, the CA-70 calcium aluminate cement of 12 parts by weight and the aluminum dihydrogen phosphate of 3 parts by weight, the furnace lining is knotted, Then the knotted furnace lining is maintained for 3 days, and it is used after drying, wherein the particle size of the fused corundum aggregate is 0.5mm, and the particle size of the corundum fine powder is less than 0.1mm;

[0051] (2) Vanadium pentoxide, aluminum particles, lime and iron filings are made into a mixture, wherein, the total amount of the mixture is 100 parts by weight, and the content of the lime is 20 parts by weight, and the composition The aluminum coefficient is 100%, and the iron distribution coefficient is 105%;

[0052] (3) The mixture in step (2) is added in the electric furnace, and the electric furnace is turned on to smelt at 1850°C. During the smelting process, detect the content ...

Embodiment 2

[0055] (1) After mixing the fused corundum aggregate of 65 parts by weight, the corundum fine powder of 20 parts by weight, the CA-70 calcium aluminate cement of 10 parts by weight and the aluminum dihydrogen phosphate of 5 parts by weight, the furnace lining is knotted, Then the knotted furnace lining is maintained for 4 days, and it is used after drying, wherein the particle size of the fused corundum aggregate is 5mm, and the particle size of the corundum fine powder is less than 0.08mm;

[0056] (2) Vanadium pentoxide, aluminum particles, lime and iron filings are made into a mixture, wherein, based on 100 parts by weight of the total amount of the mixture, the content of the lime is 25 parts by weight, and the mixture The aluminum coefficient is 106%, and the iron distribution coefficient is 22%;

[0057] (3) The mixture in step (2) is added in the electric furnace, and the electric furnace is turned on to smelt at 1900°C. During the smelting process, detect the content o...

Embodiment 3

[0060] Co-production of ferrovanadium and calcium aluminate cement according to the method described in Example 1, the difference is that in step (3), the smelting temperature is 1800°C.

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Abstract

The invention relates to the technical field of alloy smelting, and discloses a method for co-producing ferrovanadium and calcium aluminate cement. The method comprises the following steps: (1) mixingan aluminum oxide knotting material, a binder and an auxiliary binder, knotting a furnace lining, and then curing and drying the knotted furnace lining; (2) preparing vanadium pentoxide, aluminum particles, lime and scrap iron into a mixture, wherein taking the total weight amount of the mixture as 100 parts, the content of the lime is 20-25 parts; (3) adding the mixture obtained in the step (2)into an electric furnace, starting the electric furnace for smelting, and separating ferrovanadium slag from ferrovanadium alloy; and (4) carrying out crushing, pre-grinding, magnetic separation ironremoval and fine grinding on the ferrovanadium slag separated in the step (3) to obtain pure calcium aluminate cement. According to the method, aluminum oxide is adopted as a furnace lining knotting material, the content of lime is increased to 20-25% for ferrovanadium smelting, pure calcium aluminate cement can be obtained from an obtained slag phase, and the utilization additional value of ferrovanadium slag is increased.

Description

technical field [0001] The invention relates to the technical field of alloy smelting, in particular to a method for co-producing ferrovanadium and calcium aluminate cement. Background technique [0002] There are two smelting processes for ferrovanadium, namely aluminothermic reduction and silicothermal reduction. At present, aluminothermic reduction is generally used to produce ferrovanadium. The smelting equipment adopts a straight tube furnace, and the smelting of ferro-vanadium adopts a one-step ferro-vanadium smelting process, that is, each smelting furnace needs to be replaced once with a knotted combined straight tube furnace body and the furnace body is prepared offline. The vanadium-iron alloy liquid and molten slag obtained from smelting are separated by natural sedimentation after being cooled off-line in the furnace, and the smelting output of a single furnace is about 3 tons. [0003] At present, magnesia is generally used as the knotting material in the furna...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/147C04B7/36C22C1/02C22C27/02
CPCC04B7/147C04B7/32C04B7/36C22C1/02C22C27/025Y02P40/10
Inventor 郝建璋黎建明曾冠武
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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