CN113046548A - Beneficiation method for low-grade spodumene raw ore - Google Patents
Beneficiation method for low-grade spodumene raw ore Download PDFInfo
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- CN113046548A CN113046548A CN202110372590.0A CN202110372590A CN113046548A CN 113046548 A CN113046548 A CN 113046548A CN 202110372590 A CN202110372590 A CN 202110372590A CN 113046548 A CN113046548 A CN 113046548A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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Abstract
The invention provides a low-grade spodumene raw ore dressing method, which comprises the following steps: s1, crushing the low-grade spodumene raw ore into blocks with the diameter less than 5 cm; s2, preheating, namely preheating the crushed massive ore S1 to ensure that the temperature reaches 200-500 ℃; s3, sintering, namely transferring the preheated massive ore in the step S2 to a sintering furnace, heating to 1000-1100 ℃, and sintering for 0.5-1 h; s4, screening lithium fine ore powder, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 100-200-mesh screen, wherein the screened fine powder is the screened lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate. The low-grade spodumene raw ore dressing method is simple in process, can prepare the low-grade spodumene raw ore into the spodumene fine ore powder and the quartz sand, changes waste into valuable, and has great economic benefits and environmental protection benefits.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a low-grade spodumene raw ore beneficiation method.
Background
Lithium and lithium compounds have unique and excellent physical properties and chemical properties, and are widely applied to the fields of high-energy batteries, synthetic rubbers, alloys, air conditioners, medicines, welding and the like, so that the lithium and lithium compounds become new strategic resources gradually. The sorting and recovery of spodumene, particularly low grade spodumene, is becoming increasingly desirable as an important mineral feedstock for the extraction of lithium.
For lithium-containing ores, the nature of the ore is due to the diversity of the lithium-containing mineralsThe difference of the lithium content is large, and simultaneously, because the lithium-containing ore has complex reaction in the forming process and diversified products, the difference and the diversified products become important reasons for the complex sorting process of the lithium ore. With the continuous increase of the demand of lithium resources, the treatment of low-grade spodumene ore becomes an urgent problem to be solved. Low grade spodumene (also known as spodumene) is often a product of spodumene alteration, Li2The content of O is low, the selectivity is poor, and the factors make the situation that the enrichment is difficult and the selective recovery of the recovered lithium element more unfavorable.
The existing spodumene raw ore dressing method is mainly a flotation method, but the method has large environmental protection pressure, high requirements on the grade of the spodumene raw ore and high Li requirement2Low grade ore with O content below 1.0% can only be discarded.
How to effectively perform ore dressing on low-grade spodumene raw ore through a simple process, improve the economic value of the low-grade spodumene raw ore, fully utilize the low-grade spodumene raw ore and change waste into valuable is a technical problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a low-grade spodumene raw ore dressing method which is simple in process, can fully utilize low-grade spodumene raw ore, changes waste into valuable and has great economic benefit and environmental protection benefit.
The invention aims to realize the technical scheme, and the low-grade spodumene raw ore beneficiation method comprises the following steps:
s1, crushing, namely crushing the low-grade spodumene raw ore into blocks with the diameter less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to ensure that the temperature reaches 200-500 ℃;
s3, sintering, namely transferring the preheated massive ore in the step S2 to a sintering furnace, heating to 1000-1100 ℃, and sintering for 0.5-1 h;
s4, screening lithium fine ore powder, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 100-200-mesh screen, wherein the screened fine powder is the screened lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate.
Further, the low-grade spodumene raw ore beneficiation method comprises the following steps:
s5, crushing the coarse powder sieved in the step S4 to 1-3mm by a crusher, and then sieving by a 140-200 mesh sieve to obtain fine powder which is the lithium concentrate powder; the coarse powder on the screen is coarse sand.
Further, in the step S1, the content of lithium oxide in the low-grade spodumene raw ore is not more than 1.0%.
Further, the content of lithium oxide in the lithium concentrate powder in the step S4 is 4.1 to 4.8%.
The low-grade spodumene raw ore dressing method is simple in process, can prepare the low-grade spodumene raw ore into the spodumene fine ore powder and the quartz sand, changes waste into valuable, and has great economic benefits and environmental protection benefits.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A low-grade spodumene raw ore beneficiation method comprises the following steps:
s1, crushing, namely crushing 1000kg of low-grade spodumene raw ore with the lithium oxide content of 1% into blocks with the diameter of less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to enable the temperature of the crushed massive ore to reach 200 ℃;
s3, sintering, namely transferring the preheated massive ore in the step S2 to a sintering furnace, heating to 1100 ℃, and sintering for 0.5 h;
s4, cooling and screening, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 100-mesh screen, wherein the screened fine powder is the selected lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate;
s5, crushing and screening coarse sand, namely crushing the oversize coarse powder obtained in the step S4 into 1-3mm, and screening by using a 140-mesh screen, wherein the undersize fine powder is lithium concentrate powder, and the oversize coarse powder is coarse sand.
Through detection, the mass of the lithium concentrate ore powder is 213kg, the content of lithium oxide is 4.1%, and the recovery rate of the lithium oxide in the ore reaches 87.33%; the mass of the grit was 769 kg.
Example 2
A low-grade spodumene raw ore beneficiation method comprises the following steps:
s1, crushing, namely crushing 1000kg of low-grade spodumene raw ore with the lithium oxide content of 1.0% into blocks with the diameter of less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to enable the temperature of the crushed massive ore to reach 300 ℃;
s3, sintering, namely transferring the preheated massive ore obtained in the step S2 to a sintering furnace, heating to 1050 ℃, and sintering for 50 min;
s4, cooling and screening, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 140-mesh screen, wherein the screened fine powder is the selected lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate;
s5, crushing and screening coarse sand, namely crushing the oversize coarse powder obtained in the step S4 into 1-3mm, and screening by using a 200-mesh screen, wherein the undersize fine powder is lithium concentrate powder, and the oversize coarse powder is coarse sand.
Through detection, the mass of the lithium concentrate ore powder is 183kg, the content of lithium oxide is 4.8 percent, and the recovery rate of the lithium oxide in the ore reaches 86.4 percent; the mass of the coarse sand was 801 kg.
Example 3
A low-grade spodumene raw ore beneficiation method comprises the following steps:
s1, crushing, namely crushing 1000kg of low-grade spodumene raw ore with the lithium oxide content of 0.98% into blocks with the diameter of less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to ensure that the temperature reaches 400 ℃;
s3, sintering, namely transferring the preheated massive ore obtained in the step S2 to a sintering furnace, heating to 1060 ℃, and sintering for 40 min;
s4, cooling and screening, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 200-mesh screen, wherein the screened coarse powder is coarse sand containing part of lithium concentrate;
s5, crushing and screening coarse sand, namely crushing the oversize coarse powder obtained in the step S4 into 1-3mm, and screening by using a 140-mesh screen, wherein the undersize fine powder is lithium concentrate powder, and the oversize coarse powder is coarse sand.
Through detection, the mass of the lithium concentrate ore powder is 197kg, the content of lithium oxide is 4.5 percent, and the recovery rate of the lithium oxide in the ore reaches 90.46 percent; the mass of the coarse sand was 794 kg.
Example 4
A low-grade spodumene raw ore beneficiation method comprises the following steps:
s1, crushing, namely crushing 1000kg of low-grade spodumene raw ore with the lithium oxide content of 0.95% into blocks with the diameter of less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to reach the temperature of 500 ℃;
s3, sintering, namely transferring the preheated massive ore in the step S2 to a sintering furnace, heating to 1000 ℃, and sintering for 1 h;
s4, cooling and screening, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 120-mesh screen, wherein the screened fine powder is the selected lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate;
s5, crushing and screening coarse sand, namely crushing the oversize coarse powder obtained in the step S4 into 1-3mm, and screening by using a 200-mesh screen, wherein the undersize fine powder is lithium concentrate powder, and the oversize coarse powder is coarse sand.
Through detection, the mass of the lithium concentrate ore powder is 190kg, the content of lithium oxide is 4.3%, and the recovery rate of the lithium oxide in the ore reaches 86%; the mass of the coarse sand was 785 kg.
And (3) economic index analysis:
the raw materials of the invention are low-grade spodumene raw ores, basically belong to the discarded ore, the raw materials do not need to be invested, the main cost is derived from transportation cost and energy consumption cost and labor cost in the production process, after the beneficiation method of the invention is adopted, spodumene concentrate and coarse sand are obtained, calculated according to 10000 tons of beneficiation per month, and the total investment is 3000 ten thousand yuan. The economic indicators of example 2 are as follows:
therefore, the low-grade spodumene crude ore beneficiation method is simple in process, the low-grade spodumene crude ore can be prepared into spodumene fine ore powder and coarse sand, the recovery rate of lithium oxide in the ore reaches over 85 percent, and the recovery rate is greatly higher than that in a flotation method (the recovery rate in the flotation method is 75 percent); realizes changing waste into valuable and has great economic benefit and environmental protection benefit.
It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that any changes and modifications to the present invention may occur to those skilled in the art after reading the present teachings, and such equivalents are also intended to be limited by the appended claims.
Claims (4)
1. A low-grade spodumene raw ore dressing method is characterized by comprising the following steps:
s1, crushing, namely crushing the low-grade spodumene raw ore into blocks with the diameter less than 5 cm;
s2, preheating, namely preheating the crushed massive ore S1 to ensure that the temperature reaches 200-500 ℃;
s3, sintering, namely transferring the preheated massive ore in the step S2 to a sintering furnace, heating to 1000-1100 ℃, and sintering for 0.5-1 h;
s4, screening lithium fine ore powder, namely naturally cooling the powder sintered in the step S3 to normal temperature, and screening by using a 100-200-mesh screen, wherein the screened fine powder is the screened lithium fine ore powder; the coarse powder on the screen is coarse sand containing part of lithium concentrate.
2. The low-grade spodumene raw ore beneficiation process according to claim 1, characterized in that the low-grade spodumene raw ore beneficiation process comprises the steps of:
s5, crushing the coarse powder sieved in the step S4 to 1-3mm by a crusher, and then sieving by a 140-200 mesh sieve to obtain fine powder which is the lithium concentrate powder; the coarse powder on the screen is coarse sand.
3. The low-grade spodumene raw ore dressing method according to claim 1, wherein the content of lithium oxide in the low-grade spodumene raw ore in step S1 is not more than 1.0%.
4. The low-grade spodumene raw ore dressing method according to any one of claims 1 to 3, characterized in that the lithium oxide content of the spodumene ore powder in step S4 is 4.1-4.8%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086405A (en) * | 2013-01-05 | 2013-05-08 | 阿坝中晟锂业有限公司 | Clean production method of battery level lithium carbonate |
| CN106044804A (en) * | 2016-05-26 | 2016-10-26 | 四川思达能环保科技有限公司 | Novel process for producing lithium salt by aid of sulfuric acid methods |
| CN108017072A (en) * | 2016-10-28 | 2018-05-11 | 余成辰 | A kind of preparation method of lithium carbonate |
| CN108607502A (en) * | 2018-04-16 | 2018-10-02 | 成都新柯力化工科技有限公司 | A kind of Low Cost Sorbents and preparation method carrying lithium for high Mg/Li ratio brine |
| CN208711929U (en) * | 2018-07-02 | 2019-04-09 | 李放来 | Low-grade lithium brightness mine preparation equipment |
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2021
- 2021-04-07 CN CN202110372590.0A patent/CN113046548A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086405A (en) * | 2013-01-05 | 2013-05-08 | 阿坝中晟锂业有限公司 | Clean production method of battery level lithium carbonate |
| CN106044804A (en) * | 2016-05-26 | 2016-10-26 | 四川思达能环保科技有限公司 | Novel process for producing lithium salt by aid of sulfuric acid methods |
| CN108017072A (en) * | 2016-10-28 | 2018-05-11 | 余成辰 | A kind of preparation method of lithium carbonate |
| CN108607502A (en) * | 2018-04-16 | 2018-10-02 | 成都新柯力化工科技有限公司 | A kind of Low Cost Sorbents and preparation method carrying lithium for high Mg/Li ratio brine |
| CN208711929U (en) * | 2018-07-02 | 2019-04-09 | 李放来 | Low-grade lithium brightness mine preparation equipment |
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Application publication date: 20210629 |