Pretreatment method for high-calcium and high-magnesium fine-grained disseminated scheelite
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A scheelite and pretreatment technology, applied in solid separation, recycling technology, mechanical material recovery, etc., can solve the problems of waste of rare metal resources, large loss of scheelite, low recovery rate, etc. dosage, improving beneficiation efficiency and reducing the amount of ore
Active Publication Date: 2020-09-29
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
View PDF6 Cites 2 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] However, the method of full flotation after removing magnetic minerals by magnetic separation, due to the agglomeration of minerals and the influence of high-calcium-magnesium-rich gangue minerals, leads to a large loss of scheelite in tailings, low recovery rate, and poor effect. , the obtained scheelite concentrate contains WO 3 less than 20%
[0006] Based on the above reasons, the magnesia skarn-type scheelite, which is high-calcium and high-magnesium fine-grained scheelite, has not been developed and utilized at present, resulting in a waste of rare metal resources.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0029] Pretreatment of scheelite ore, the composition of scheelite ore is: 0.155% WO 3 , 30% CaCO 3 , 15% MgO, refer to figure 1 , preprocess as follows:
[0030] The first stage of grinding: Add 100 g / ton of sodium hexametaphosphate to the raw scheelite ore (that is, add 100 grams of sodium hexametaphosphate per ton of scheelite ore), and prepare sodium hexametaphosphate into an aqueous solution For adding, the mass percent concentration of the sodium hexametaphosphate aqueous solution is 1%. Then the slurry is adjusted to a mass concentration of 62.5%, and the ore is ground to a scheelite monomer dissociation degree of 70%.
[0031] The first gravity separation and classification: adjust the pulp concentration after grinding to 23.5% of the mass concentration, carry out gravity separation and classification in the spiral chute, and obtain spiral concentrate, spiral medium ore and spiral tailings; the spiral concentrate has a high content of scheelite, and the spiral Tailin...
Embodiment 2
[0039] Pretreatment of scheelite ore, the composition of scheelite ore is: 0.447% WO 3 , 35% CaCO 3 , 28% MgO, refer to figure 1 , preprocess as follows:
[0040] The first stage of grinding: Add 800 g / ton of sodium hexametaphosphate to raw scheelite ore (that is, add 800 grams of sodium hexametaphosphate per ton of scheelite ore), and add sodium hexametaphosphate into an aqueous solution. The mass percent concentration of the sodium phosphate aqueous solution is 0.5%. Then the slurry is adjusted to a mass concentration of 67.5%, and the ore is ground to a scheelite monomer dissociation degree of 78%.
[0041] The first gravity separation and classification: adjust the pulp concentration after grinding to a mass concentration of 28.5%, carry out spiral chute gravity separation and classification to obtain spiral concentrate, spiral medium ore and spiral tailings; spiral concentrate has high scheelite content, spiral Tailings are mainly gangue minerals.
[0042] The second...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention belongs to the technical field of mineral treatment, and particularly discloses a method for pretreating high-calcium and high-magnesium fine-grained disseminated scheelite. The method comprises the steps: raw scheelite is subjected to two times of gravity-separation classification after being subjected to primary grinding, primary concentrating and secondary concentrating are combined for secondary grinding, and then magnetic-separation treatment is conducted; secondary tailings are de-slimed to obtain a spillover flow, the spillover flow, fine slime and primary tailings are enriched, and fine slime concentrate is obtained; the fine slime concentrate enters into magnetic-separation treatment; and ore pulp of secondary grinding and the fine slime concentrate are combined to be subjected to magnetic-separation treatment, and pretreated concentrate is obtained. According to the pretreatment method, the technical problem that the high-calcium and high-magnesium slime is agglomerated, and consequently the fine-grained disseminated scheelite is difficult to recover is solved, most gangue minerals and slime are abandoned through pretreatment, the amount of ore entering intosubsequent scheelite flotation is decreased, the beneficiation feed grade of WO3 in the flotation ore is increased, and the using quantity of a reagent during subsequent flotation is greatly decreased.
Description
technical field [0001] The invention relates to the technical field of mineral treatment, in particular to a pretreatment method for high-calcium and high-magnesium fine-grained scheelite. Background technique [0002] Tungsten is mainly used in the manufacture of various alloy steels. It is an essential element in the production of gun barrels, high-temperature alloys for engines, rocket nozzles, armor-piercing projectiles, electromagnetic guns, etc. It is known as the "King of War Metals" and is an important strategic mineral for the country. resource. my country is rich in tungsten resources, but after years of over-exploitation, the easy-to-mining wolframite resources are close to exhaustion, and scheelite, which accounts for 70% of the country's tungsten resources, has large reserves, but 85% of the resources are due to low grade and particle size. Fine and high recycling cost, so it is difficult to develop and utilize. [0003] Magnesia skarn-type scheelite has the ch...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B1/00B03B1/04B03B9/06
CPCB03B9/00B03B1/00B03B1/04B03B9/06Y02W30/52
Inventor 邓丽红周晓彤付广钦关通尚兴科
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
Login to view more 
Login to view more