Method for extracting polyhalite from polyhalite ore containing gangue minerals
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 technology for gangue minerals and polyhalite minerals, which is applied in chemical instruments and methods, wet separation, selective deposition methods, etc. The development and utilization of polyhalite ore has not been reported and other problems, so as to reduce the extraction cost and improve the product yield.
Active Publication Date: 2019-12-13
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
View PDF6 Cites 1 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
[0003] Generally speaking, the gangue mineral in polyhalite ore is sodium chloride (NaCl), but some polyhalite ores have silicates (such as quartz, etc.) or clastic rocks in addition to sodium chloride. Gangue minerals, and their content is more than 10%, these gangue minerals have a certain impact on the flotation of polyhalite
Although there have been related reports to extract polyhalite by positive flotation process, the technical routes adopted are all aimed at high-sodium polyhalite ore, and the gangue minerals therein are only sodium chloride; There is no report on the development and utilization of polyhalite mines of gangue minerals such as sodium chloride and detrital salts. How to develop and utilize polyhalite mines in this polyhalite mines containing sodium chloride and silicate gangue minerals Help to improve the actual value of polyhalite development and utilization
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
[0058] In this embodiment, first, the low-grade polyhalite ore containing gangue minerals such as silicate, detrital salt, and halite is ground to -200 mesh (-0.074mm) and accounts for 80.26 wt%. For rod milling, sodium metaphosphate is added as a dispersant according to the addition amount of 60g / 1t polyhalite ore, the mass concentration of ore grinding is 55%, and the grinding medium is saturated mother liquor to obtain ore abrasive slurry.
[0059] The main components of the low-grade polyhalite ore in this example are shown in Table 1.
[0060] Table 1 Main components of low-grade polyhalite ore
[0061]
[0062] The main components of the saturated mother liquor used as the grinding medium in this embodiment are shown in Table 2.
[0063] The main components of the saturated mother liquor of table 2 grinding media
[0064]
[0065] Then, add adjuster and flocculant to the ore abrasive slurry, and mix uniformly to obtain flotation raw material.
[0066] In this ex...
Embodiment 2
[0090] In this embodiment, first, the low-grade polyhalite ore containing gangue minerals such as silicate, detrital salt, and halite is ground to -200 mesh (-0.074mm) and accounts for 75.33 wt%. For rod milling, sodium metaphosphate is added as a dispersant according to the addition amount of 90g / 1t polyhalite ore, the mass concentration of ore grinding is 50%, and the grinding medium is saturated mother liquor to obtain ore abrasive slurry.
[0091] The low-grade polyhalite ore of this embodiment is the same as that of Embodiment 1, as shown in Table 1.
[0092] The main components of the saturated mother liquor used as the grinding medium in this embodiment are shown in Table 6.
[0093] The main components of the saturated mother liquor of table 6 grinding media
[0094]
[0095] Then, add adjuster and flocculant to the ore abrasive slurry, and mix uniformly to obtain flotation raw material.
[0096] In this example, the adjusting agent is sodium hexadecylsulfonate, t...
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 discloses a method for extracting polyhalite from polyhalite ore containing gangue mineral. The method comprises the steps that firstly, polyhalite ore containing gangue minerals containing halite and silicate and / or scrap salt is ground, a dispersing agent and ore grinding mother liquor are added, and ore grinding slurry is obtained; secondly, an adjusting agent and a flocculating agent are added in the ore grinding slurry, and a flotation raw material is obtained; thirdly, the flotation raw material is subjected to roughing in flotation mother liquor, and a selected raw material and a scavenging raw material are obtained; fourthly, the selected raw material is sequentially subjected to primary selection and secondary selection, secondary selected concentrates are obtained,the scavenging raw material is subjected to scavenging, and scavenging tailings are obtained; and fifthly, the flotation mother liquor and washing mother liquor are mixed to serve as a washing medium,solid-liquid separation is conducted after the secondary selected concentrates are washed, and polyhalite products are obtained. The method is suitable for separating and extracting the polyhalite from the polyhalite ore containing gangue minerals containing the silicate and / or the scrap salt and the like, and a technical scheme for utilizing the polyhalite in other types of polyhalite ore is further provided.
Description
technical field [0001] The invention belongs to the technical field of ore separation and extraction, and specifically relates to a method for extracting polyhalite from polyhalite ore containing gangue minerals. Background technique [0002] Polyhalite (K 2 SO 4 2CaSO 4 · MgSO 4 2H 2 O) Potassium (in K 2 The O content) is as high as 15.64%, and it has been recognized as an ore with comprehensive utilization value of potassium, magnesium and sulfur. Extract effective potassium, magnesium, sulfur, calcium and other components from polyhalite ore to form potassium sulfate, potassium magnesium sulfate fertilizer, magnesium sulfate, gypsum and other agricultural and industrial products. Polyhalites are found in many ancient and modern salt deposits in the world, and are widely distributed in the Tertiary and Quaternary salt lake deposits in my country, such as in the Qaidam Basin (Dayan Beach, Dalang Beach, Chaerhan Salt Lake), the Tertiary saline system in the Sichuan Bas...
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 
Login to view more