Calcification vanadium slag sintering method

A technology for calcification roasting and vanadium slag is applied in the field of calcification roasting vanadium slag, which can solve the problems of no patents or reports on vanadium-containing materials, and achieve the effects of shortening roasting time, easy temperature control, and improving production capacity.

Inactive Publication Date: 2008-04-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The result of consulting the literature shows that there is no patent or report that directly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Roasting experiment of embodiment 1 vanadium slag in muffle furnace

[0016] Vanadium slag (containing V 2 o 5 15.43%, CaO<0.5%) crushed to pass through a 0.1mm sieve. Take 100g of crushed vanadium slag, add 7.72g of lime, mix well and put it in a porcelain crucible for use.

[0017] The temperature of the muffle furnace was raised to 900°C and kept at a constant temperature. Put the prepared vanadium slag mixture into the muffle furnace, take it out after 60 minutes and cool it to room temperature. Crush the roasted clinker until it passes through a 40-mesh sieve, take 80g of clinker and add 320ml of water to make a slurry, then add sulfuric acid with a concentration of 32% to adjust the pH of the solution, keep the pH value of the leaching process at 2.8-3.3, and leaching for 1h Finally, filter the solution, wash the residue 5 times, dry, weigh and analyze the vanadium content of the residue. The conversion rate of vanadium in vanadium slag is 88.95%.

Embodiment 2

[0018] Roasting experiment of embodiment 2 vanadium slag in rotary tube

[0019] Vanadium slag (containing V 2 o 5 16.7%, CaO<0.5%) crushed to pass through a 0.1mm sieve. The crushed vanadium slag and lime were prepared in a weight ratio of 100:9.5 to obtain a 2kg sample, and mixed evenly.

[0020] Raise the temperature of the Ф100×1200mm two-section temperature-controlled rotary tube to 600°C at the rear and 950°C at the front and keep it constant. Add the prepared sample above from the tail of the rotary tube, and control the rotation speed and inclination of the rotary tube so that the average residence time of the vanadium slag in the furnace tube is 50-60 minutes. After the baked clinker is cooled to room temperature, it is crushed to pass through a 40-mesh sieve. Take 1.8kg of the roasted clinker and make a slurry with 3600mL of water. After leaching for 1 hour, filter the solution, wash the residue with water for 5 times, dry, weigh and analyze the vanadium content...

Embodiment 3

[0021] Example 3 High-calcium vanadium slag roasting experiment in fluidized furnace

[0022] A high-calcium vanadium slag directly blown, its V 2 o 5 The CaO content is 14.3%, and the CaO content is 8.86%. The vanadium slag is ground until it passes through a 0.1mm sieve.

[0023] Take 100kg of crushed high-calcium vanadium slag and roast it in a fluidized fluidized furnace of Ф100×2500mm, feed the material from the upper part and discharge the roasted clinker from the lower part, control the average temperature in the fluidized fluidized furnace to 900 °C, and control the average temperature of the vanadium slag in the fluidized fluidized furnace. The residence time is 30min. The roasted clinker released from the oven is crushed to pass through a 40-mesh sieve, 10kg of the roasted clinker is taken, and after being adjusted into a slurry with 30L of water, sulfuric acid with a concentration of 63% is added to adjust the pH of the solution to keep the pH value of the leachi...

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PUM

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Abstract

The invention discloses a method of vanadium slag direct entering high temperature roasting furnace calcify roasting, that is, high calcium vanadium slag or ordinary vanadium slag and lime or limestone are mixed uniformly without the gradual heating up process from low temperature to high temperature, the mixture enters into the roasting furnace of more than 600 DEG C for calcified roasting., the vanadium of the vanadium slag is changed into vanadium acid calcium, vanadium of the roasting clinker is dissolved into the solution under the leaching function of sulphuric acid solution, vanadium oxide and the like vanadium products are further made. The invention needs no gradual heating up process from low temperature to high temperature of the prior sodium treatment roasting, thereby reducing roasting time, improving productivity of unit and reducing production cost.

Description

technical field [0001] The invention relates to a method for calcifying and roasting vanadium slag, in particular to a method for calcifying and roasting vanadium slag directly into a high-temperature roasting furnace. Background technique [0002] Vanadium slag is a vanadium-enriched material blown from vanadium-containing iron water with oxygen or oxygen-enriched air and other oxygen-containing gases. Enterprises that use vanadium-titanium-magnetite as raw materials to produce iron and vanadium products usually use the traditional vanadium slag sodium roasting and water leaching vanadium extraction process to produce vanadium oxide, vanadium iron, vanadium nitride and other products, such as China's Panzhihua Iron and Steel Co., Ltd. Chenggang, Russia's Nizhny Tagil and Chusov Iron and Steel Joint Enterprises, etc. adopt blast furnace, converter blowing vanadium, and converter steelmaking processes; South Africa Highveld, New Zealand Steel Company, etc. adopt rotary kiln r...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B1/14C22B3/08C22B34/22
CPCY02P10/20
Inventor 彭毅朱胜友谢屯良张帆刘武汉潘平王小江周宗权边悟
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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