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Clean production process for extracting vanadium in carbonaceous shale containing vanadium by hot press oxidation method
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A technology of hot-pressed oxidation and clean production, applied in the direction of improving process efficiency, etc., can solve problems such as low leaching rate, environmental pollution, and difficult treatment, and achieve high production safety, simple vanadium extraction process, and easy production operation Effect
Inactive Publication Date: 2012-05-09
贵州省地质矿产中心实验室
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Problems solved by technology
However, there are several major problems in the sodium roasting process: first, the environmental pollution is very serious; second, the leaching rate is very low, generally only 40-50%; third, it is impossible to comprehensively recover the associated valuable elements in the ore. stop
Direct acid leaching and oxygen pressure acid leaching generally use H 2 SO 4 As the main leaching agent, sulfuric acid easily reacts with calcium in the ore to form by-products such as gypsum, which hinders the leaching agent from further interacting with vanadium-loaded minerals, affects the leaching rate of vanadium, and is uneconomical in terms of cost
Oxygen pressure alkaline leaching process is actually shifted from the Bayer process for aluminum extraction. The existing problems are similar to the oxygen pressure acid leaching process for vanadium extraction, and the follow-up treatment is more difficult. Generally, it is only used in the process of Bayer process for aluminum extraction. Comprehensive Recovery of Vanadium
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Embodiment 1
[0033] Example 1: Take 100 kilograms of vanadium-containing carbonaceous shale, crush and grind until the ore particle size-0.15mm part accounts for 75% of the total ore quality, place it in a titanium material autoclave, add 75 kilograms to a concentration of 20% hydrochloric acid, heated up to 100°C, fed oxygen to make the pressure in the kettle to 1MPa, continued to heat up to 200°C, stirred and leached for 4 hours, the leaching rate could be as high as 90%, cooled, filtered, and the filtrate was purified by extraction-reextraction, ammonium Salt precipitation of vanadium, calcination, preparation of vanadium pentoxide.
[0034] Titanium autoclaves have excellent corrosion resistance. The leaching process is carried out in a closed system without roasting and has no pollution to the atmospheric environment. Two autoclaves can also be used for alternate leaching, which can make full use of heat energy and greatly reduce leaching energy consumption.
Embodiment 2
[0035]Example 2: Take 100 kg of vanadium-containing carbonaceous shale, crush and grind until the ore particle size-0.15mm part accounts for 60% of the total ore mass, place it in a titanium autoclave, add 80 kg of it to a concentration of 25% hydrochloric acid, heated up to 95°C, fed oxygen to make the pressure in the kettle to 1.2MPa, continued to heat up to 180°C, stirred and leached for 2 hours, cooled, filtered, the filtrate was purified by extraction-stripping, ammonium salt precipitation vanadium, calcined, and prepared Vanadium pentoxide.
Embodiment 3
[0036] Example 3: Take 100 kg of vanadium-containing carbonaceous shale, crush and grind until the ore particle size-0.15mm part accounts for 90% of the total ore mass, place it in a titanium autoclave, add 66.7 kg of it to a concentration of 15% hydrochloric acid, heated to 98°C, fed oxygen to make the pressure in the kettle to 0.8MPa, continued to heat up to 220°C, stirred and leached for 3 hours, cooled, filtered, and the filtrate was purified by extraction-stripping, ammonium salt precipitation of vanadium, calcined, and prepared Vanadium pentoxide.
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Abstract
The invention discloses a clean production process for extracting vanadium in carbonaceous shale containing vanadium by a hot press oxidation method. The process comprises the following steps: carbonaThe invention discloses a clean production process for extracting vanadium in carbonaceous shale containing vanadium by a hot press oxidation method. The process comprises the following steps: carbonaceous shale containing vanadium is crushed and placed in a high-pressure kettle; hydrochloric acid with the concentration of 10-30 percent is added to the high-pressure kettle; the temperature is raisceous shale containing vanadium is crushed and placed in a high-pressure kettle; hydrochloric acid with the concentration of 10-30 percent is added to the high-pressure kettle; the temperature is raised to 80-100 DEG C; oxygen is led into the kettle to ensure that the pressure in the kettle is 0.5-1.5MPa; then the temperature is continuously raised to 160-250 DEG C; the solution is stirred, soakeded to 80-100 DEG C; oxygen is led into the kettle to ensure that the pressure in the kettle is 0.5-1.5MPa; then the temperature is continuously raised to 160-250 DEG C; the solution is stirred, soaked, cooled and filtered; and the filtered liquid is prepared into vanadic oxide according to a normal technology. Compared with the prior art, the process adopts hydrochloric acid as a soaked medicament, cooled and filtered; and the filtered liquid is prepared into vanadic oxide according to a normal technology. Compared with the prior art, the process adopts hydrochloric acid as a soaked medicament, directly soaks vanadium under the conditions of heating, pressuring and oxygen passing, does not need to bake ore, has no pollution to the atmospheric environment completely and has no special requi, directly soaks vanadium under the conditions of heating, pressuring and oxygen passing, does not need to bake ore, has no pollution to the atmospheric environment completely and has no special requirements to ore properties and quality, thereby being a clean vanadium extracting method. The soaked rate of vanadium can be more than 90 percent, and the highest soaked rate can reach about 95 percentrements to ore properties and quality, thereby being a clean vanadium extracting method. The soaked rate of vanadium can be more than 90 percent, and the highest soaked rate can reach about 95 percent. In addition, the process for extracting vanadium is simple and easy to operate, is environmental-friendly, and has low vanadium extracting material consumption, high soaked rate of vanadium and high. In addition, the process for extracting vanadium is simple and easy to operate, is environmental-friendly, and has low vanadium extracting material consumption, high soaked rate of vanadium and high production safety.production safety.
Description
technical field [0001] The invention relates to the technical field of clean vanadium extraction, in particular to a clean production process for extracting vanadium in vanadium-containing carbonaceous shale using a hot-pressed oxidation method. Background technique [0002] Vanadium is an important material for the preparation of high-tech products such as special steel, vanadium-titanium alloys, catalysts, and vanadium flow energy storage batteries, and is widely used in modern industrial technology. Vanadium ore resources mainly include vanadium-titanium magnetite and vanadium-bearing carbonaceous shale. Vanadium-containing carbonaceous shale accounts for 87% of the total vanadium reserves in my country and is an important resource of vanadium. [0003] Sodium roasting process is still the most studied and mature process for extracting vanadium from vanadium-bearing carbonaceous shale. However, there are several major problems in the sodium roasting process: first, the e...
Claims
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Application Information
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