New method for extracting rubidium from rubidium-containing ore

A new method and ore technology, applied in the field of rubidium extraction, can solve problems such as environmental pollution, high energy consumption, and high cost

Inactive Publication Date: 2017-10-20
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] Because the above method has the disadvantages of low ore decomposition rate, environmental pollution, high energy consumption, high cost, etc., it is urgent to develop a high-efficiency, low-pollution rubidium extraction process to make mica, cesium garnet, feldspar and other rubidium-containing ores The rubidium element gets economical and reasonable recovery technology

Method used

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  • New method for extracting rubidium from rubidium-containing ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Mix lepidolite-containing rubidium-containing ore with a particle size of -0.074mm, accounting for more than 88%, and 90% concentrated sulfuric acid. The sulfuric acid slaking material was obtained under the conditions of temperature 200°C and slaking time 8h. The sulfuric acid slaking material is mixed uniformly according to the coal ratio of 12%, and the rapid reduction roasting is carried out at a temperature of 750 ° C, and the roasting time is 5 minutes.

[0061] The reduced calcine leaching temperature is 90°C, the time is 60min, and the liquid-solid ratio is 2:1, so that lithium, potassium, and rubidium enter the water immersion solution. The lithium leaching rate is 90%, and the rubidium leaching rate is 85%. Potassium solution is purified to prepare rubidium, lithium and potassium products.

[0062] Alkali dissolution is carried out on the water leaching residue, and the dissolution conditions are: dissolution temperature 100°C, alkali concentration 150g / L, in...

Embodiment 2

[0064] Mix the rubidium-containing ore with a particle size of -0.074mm and more than 90% of the finely ground cesium garnet with 93% concentrated sulfuric acid. Sulfuric acid slaking material was obtained under the conditions of 320°C slaking temperature and 8h slaking time. The sulfuric acid slaking material is uniformly mixed with coal powder at a coal ratio of 15%, and is subjected to rapid reduction roasting at a temperature of 800°C, and the roasting time is 10 minutes.

[0065] The reduced calcined sand is leached at a temperature of 70°C, for 30 minutes, and at a liquid-solid ratio of 3:1, so that rubidium and cesium enter the water immersion solution. The leaching rate of rubidium and cesium is 90%, and the leaching rate of cesium is 92%. Purify the solution containing rubidium and cesium. Preparation of rubidium and cesium products.

[0066] Alkali dissolution is carried out on the water leaching residue, and the dissolution conditions are: dissolution temperature 9...

Embodiment 3

[0068] Mix the potassium feldspar-containing rubidium-containing ore with a particle size of -0.074mm accounting for more than 93% and 95% concentrated sulfuric acid, and the addition amount is 1.8 times the quality of the rubidium-containing ore based on 98% concentrated sulfuric acid. The sulfuric acid slaking material was obtained under the conditions of 380°C slaking temperature and 4h slaking time. The sulfuric acid slaking material is passed into the gas in the fluidized roasting furnace, and the rapid reduction roasting is carried out at a temperature of 750 ° C, and the roasting time is 1 min.

[0069] The reduced calcined sand is leached at a temperature of 90°C, for 30 minutes, and at a liquid-solid ratio of 3:1, so that rubidium and potassium enter the water immersion solution, the leaching rate of rubidium and potassium is 89%, and the leaching rate of potassium is 90%, and the solution containing rubidium and potassium is purified. Preparation of rubidium and pota...

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Abstract

The invention discloses a new method for extracting rubidium from rubidium-containing ore, and belongs to the technical field of rubidium extraction. The method includes the steps that rubidium concentrate produced through levigation or beneficiation of the rubidium-containing ore including low-grade mica, pollucite, feldspar and the like is evenly mixed with a proper amount of concentrated sulfuric acid to be cured, and then is subjected to high-temperature fast reduction roasting desulfurization with a reducing agent under a certain temperature condition, and flue gas containing sulfur achieves sulfuric acid regenerative cycle and utilization by means of acid making; rubidium, lithium, potassium, caesium and other elements are extracted from reduced calcine through water, a rubidium-containing solution is further purified, and the wet metallurgy processes such as a fractional crystallization separation method, an ion exchange method, a precipitation method and an extraction method are mainly adopted to obtain a corresponding rubidium product and lithium, potassium and caesium products; and liquid leached residues are subjected to alkaline leaching to prepare aluminium oxide. By the adoption of the new method, the sulfuric acid can be recycled through decomposition of aluminosilicate in the concentrated sulfuric acid reinforced rubidium-containing ore and decomposition of sulfate in a cured material under the reducing atmosphere, and therefore the new method for economic recovery of rubidium, lithium, potassium and caesium resources from the rubidium-containing ore like the low-grade mica, the pollucite and the feldspar or the rubidium concentrate is formed.

Description

technical field [0001] The invention belongs to the technical field of rubidium extraction, and specifically relates to a method for extracting rubidium from low-grade mica, cesium garnet, feldspar and other rubidium-containing ores or rubidium concentrate produced by ore dressing. Background technique [0002] The abundance of rubidium in the earth's crust is 90ppm (Taylor 1964), and it is widely distributed in the earth's crust. But in nature, no independent mineral of rubidium has been found, and it is called "typical lithophilic dispersed dilute alkali element" because of the difficulty of extraction. [0003] my country has rich reserves of rubidium resources, and the reserves of rubidium oxide are about 600,000 tons, which are mainly stored in lepidolite, cesium garnet and salt lake brine. Among them, the rubidium content in lepidolite accounts for 55% of the national rubidium resource reserves, and Jiangxi Yichun lepidolite reserves are the most It is abundant and is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/10C22B1/02C22B3/04C22B26/12C22B3/12C22B21/00
CPCC22B1/02C22B3/04C22B3/12C22B21/0007C22B21/0015C22B26/10C22B26/12Y02P10/20
Inventor 范艳青蒋训雄张登高冯林永
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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