CN112357936A - Roasting process of non-mainstream lithium ore - Google Patents
Roasting process of non-mainstream lithium ore Download PDFInfo
- Publication number
- CN112357936A CN112357936A CN202011262251.9A CN202011262251A CN112357936A CN 112357936 A CN112357936 A CN 112357936A CN 202011262251 A CN202011262251 A CN 202011262251A CN 112357936 A CN112357936 A CN 112357936A
- Authority
- CN
- China
- Prior art keywords
- lithium
- ore
- namely
- roasting
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
- C01D15/04—Halides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a roasting process of non-mainstream lithium ores, which comprises the following specific process steps of 1, and is characterized in that: the specific process steps are as follows: s1, selecting materials, and selecting the lithium ore with complete product phase as a manufacturing material by adopting a flotation method. Compared with the prior art, the invention has the beneficial effects that: the preparation method for producing lithium iron phosphate by using lithium ore as a lithium source comprises the steps of cooling crystallization, separation, impurity removal, drying and the like in the preparation of lithium salt, shortens the evaporation concentration time of mother liquor, saves the marketing cost of lithium salt, has the advantages of short process flow, low energy consumption, high comprehensive benefit, realization of circular economy and the like, can greatly reduce the production cost, improves the utilization rate of resources, realizes the circular economy, and is simple in process, easy to operate, low in cost, non-toxic, pollution-free and suitable for extracting high-purity lithium chloride from lithium ore.
Description
Technical Field
The invention relates to the technical field of copper pipe stretch forming processing, in particular to a roasting process of non-mainstream lithium ore.
Background
Lithium resources which can be developed and utilized in nature mainly comprise lithium ore and salt lake brine. China mainly depends on lithium ores to produce lithium salts because the content of magnesium and lithium in brine of salt lakes is high and the magnesium and lithium are difficult to separate. The most used of the hectorites are spodumene, followed by petalite and lepidolite. The lithium extraction method is different because the physicochemical properties and impurity components of different lithium ores are different. The currently common ore lithium extraction processes include a sulfuric acid method, a sulfate method, a limestone roasting method, a soda ash pressure boiling method, a chlorination roasting method and the like, lithium chloride is one of important products in the lithium industry, is the only raw material for preparing metal lithium, and is widely applied to the fields of biology, medicine, environmental protection and the like. The purity of the lithium chloride produced industrially at present is generally between 98% and 99.5%, the market of domestic and foreign industrial grade lithium chloride is nearly saturated, and the high-purity lithium chloride of 99.9% has higher price and is in short supply. The method for producing lithium chloride mainly comprises a conversion method, a solvent extraction method, an ion exchange adsorption method, a salting-out method, a flotation method and the like, wherein high-purity lithium chloride can be obtained by the solvent extraction method and the ion exchange adsorption method, but the method has high cost and high toxicity, and industrial popularization is not realized.
Disclosure of Invention
The invention aims to provide a roasting process of non-mainstream lithium ore, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a roasting process of non-mainstream lithium ore comprises the following specific process steps:
1. a roasting process of non-mainstream lithium ore is characterized by comprising the following steps: the specific process steps are as follows:
s1, selecting materials, namely selecting the lithium ore with complete phase as a manufacturing material by adopting a flotation method, namely, obtaining the more complete lithium ore by the process of flotation of solid minerals from a water suspension (namely ore pulp);
s2, drying, and further drying the ore floated in the S1;
s3, grinding, namely grinding the lithium ore dried in the step S2 to obtain lithium ore powder;
s4, roasting, namely placing the lithium ore powder obtained in the step S3 in a roasting furnace for roasting, and simultaneously adding a reactant into the lithium ore powder to calcine the lithium ore powder, wherein the roasting temperature is controlled to be 1000-1500 ℃, the roasting time is controlled to be 2-3 hours, and the powder of lithium chloride and impurities are obtained after roasting is finished;
s5, removing impurities, namely putting the mixed impurities obtained in the S4 into an aqueous solution for dissolving, and then adding sodium carbonate into the solution, so that impurities such as magnesium ions and calcium ions in the solution can be removed through precipitation, and a lithium chloride solution containing the impurities is obtained;
s6, filtering, namely filtering the mixed solution in the S5 to filter insoluble impurities in the solution, so as to obtain a relatively pure lithium chloride solution;
and S7, drying, namely heating and drying the lithium chloride solution obtained in the S6, and evaporating excessive water and hydrochloric acid in the mixture to obtain high-purity lithium chloride powder.
Preferably, the flotation method in S1 is a process of floating solid minerals from a water suspension (i.e. slurry) to obtain more complete lithium ore, and during the flotation, air is introduced into the slurry to form a large amount of bubbles, so that particles (i.e. water-based minerals) which are not easy to be wetted by water are attached to the bubbles and float to the surface of the slurry along with the bubbles to form a mineralized foam layer; and the particles which are easily wetted by water (namely hydrophilic minerals) can not be attached to the air bubbles and are left in the ore pulp, so that the flotation effect is achieved.
Preferably, the heating drying in S2 can be performed in a conventional drying furnace, the drying time is determined by the amount of the lithium ore, and the drying time for one ton of the lithium ore is preferably controlled to be 2-3 hours.
Preferably, in the grinding of the lithium ore in S3, the lithium ore is firstly put into a crusher for crushing treatment, and after the crushing is finished, the crushed lithium ore is put into a grinder for grinding treatment, and the grinding particle size is preferably maintained at 305-400 mm.
Preferably, the reactant in S4 may be a mixture of ammonium chloride and calcium chloride.
Preferably, the filtration in S5 may be performed by a pressure filtration method, thereby improving the filtration efficiency of the solution.
Compared with the prior art, the invention has the beneficial effects that: the preparation method for producing lithium iron phosphate by using lithium ore as a lithium source comprises the steps of cooling crystallization, separation, impurity removal, drying and the like in the preparation of lithium salt, shortens the evaporation concentration time of mother liquor, saves the marketing cost of lithium salt, has the advantages of short process flow, low energy consumption, high comprehensive benefit, realization of circular economy and the like, can greatly reduce the production cost, improves the utilization rate of resources, realizes the circular economy, and is simple in process, easy to operate, low in cost, non-toxic, pollution-free and suitable for extracting high-purity lithium chloride from lithium ore.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a roasting process of non-mainstream lithium ore comprises the following specific process steps:
example 1
S1, selecting materials, namely selecting the lithium ore with complete product phase as a manufacturing material by adopting a flotation method, namely obtaining the more complete lithium ore by a process of floating solid minerals from a water suspension (namely ore pulp), wherein the flotation method in S1 is a process of floating solid minerals from a water suspension (namely ore pulp) so as to obtain the more complete lithium ore, and introducing air into the ore pulp during flotation so as to form a large amount of bubbles, so that particles (namely water-based minerals) which are not easily wetted by water are attached to the bubbles and float to the surface of the ore pulp along with the bubbles to form a mineralized foam layer; the particles which are easy to be wetted by water (namely hydrophilic minerals) can not be attached to the air bubbles and remain in the ore pulp, thereby achieving the effect of flotation;
s2, drying, namely further drying the ore floated in the S1, wherein in the S2, a common drying furnace can be adopted for heating and drying, the drying time is determined by the amount of the lithium ore, and the drying time of one ton of lithium ore is preferably controlled to be 2-3 hours;
s3, grinding, namely grinding the dried lithium ore in the step S2 to obtain lithium ore powder, and grinding the lithium ore in the step S3, wherein firstly, the lithium ore is put into a grinder to be ground, and the ground lithium ore is put into a grinder to be ground after being ground, and the grinding granularity is preferably kept at 305-400 mm;
s4, roasting, namely placing the lithium ore powder obtained in the step S3 in a roasting furnace for roasting, and simultaneously adding a reactant into the lithium ore powder to calcine the lithium ore powder, wherein the roasting temperature is controlled to be 1000 ℃, the roasting time is controlled to be 2 hours, the powder of lithium chloride and impurities are obtained after roasting is finished, and the reactant in the step S4 can be a mixture of ammonium chloride and calcium chloride;
s5, removing impurities, namely putting the mixed impurities obtained in the S4 into an aqueous solution for dissolving, and then adding sodium carbonate into the solution, so that impurities such as magnesium ions and calcium ions in the solution can be precipitated and removed, and a lithium chloride solution containing the impurities is obtained, wherein a pressure filtration method can be adopted for filtration in the S5, and thus the filtration efficiency of the solution is improved;
s6, filtering, namely filtering the mixed solution in the S5 to filter insoluble impurities in the solution, so as to obtain a relatively pure lithium chloride solution;
and S7, drying, namely heating and drying the lithium chloride solution obtained in the S6, and evaporating excessive water and hydrochloric acid in the mixture to obtain high-purity lithium chloride powder.
From example 1, it can be seen that: the lithium chloride prepared by the processing method has general precision and higher impurity content.
Example 2
S1, selecting materials, namely selecting the lithium ore with complete product phase as a manufacturing material by adopting a flotation method, namely obtaining the more complete lithium ore by a process of floating solid minerals from a water suspension (namely ore pulp), wherein the flotation method in S1 is a process of floating solid minerals from a water suspension (namely ore pulp) so as to obtain the more complete lithium ore, and introducing air into the ore pulp during flotation so as to form a large amount of bubbles, so that particles (namely water-based minerals) which are not easily wetted by water are attached to the bubbles and float to the surface of the ore pulp along with the bubbles to form a mineralized foam layer; the particles which are easy to be wetted by water (namely hydrophilic minerals) can not be attached to the air bubbles and remain in the ore pulp, thereby achieving the effect of flotation;
s2, drying, namely further drying the ore floated in the S1, wherein in the S2, a common drying furnace can be adopted for heating and drying, the drying time is determined by the amount of the lithium ore, and the drying time of one ton of lithium ore is preferably controlled to be 2-3 hours;
s3, grinding, namely grinding the dried lithium ore in the step S2 to obtain lithium ore powder, and grinding the lithium ore in the step S3, wherein firstly, the lithium ore is put into a grinder to be ground, and the ground lithium ore is put into a grinder to be ground after being ground, and the grinding granularity is preferably kept at 305-400 mm;
s4, roasting, namely placing the lithium ore powder obtained in the step S3 in a roasting furnace for roasting, and meanwhile, adding a reactant into the lithium ore powder to calcine the lithium ore powder, wherein the roasting temperature is controlled at 1200 ℃, the roasting time is controlled at 2.5 hours, the powder of lithium chloride and impurities are obtained after roasting is finished, and the reactant in the step S4 can be a mixture of ammonium chloride and calcium chloride;
s5, removing impurities, namely putting the mixed impurities obtained in the S4 into an aqueous solution for dissolving, and then adding sodium carbonate into the solution, so that impurities such as magnesium ions and calcium ions in the solution can be precipitated and removed, and a lithium chloride solution containing the impurities is obtained, wherein a pressure filtration method can be adopted for filtration in the S5, and thus the filtration efficiency of the solution is improved;
s6, filtering, namely filtering the mixed solution in the S5 to filter insoluble impurities in the solution, so as to obtain a relatively pure lithium chloride solution;
and S7, drying, namely heating and drying the lithium chloride solution obtained in the S6, and evaporating excessive water and hydrochloric acid in the mixture to obtain high-purity lithium chloride powder.
From example 2, it can be seen that: the lithium chloride powder prepared by the processing method has high precision and low impurity content.
Example 3
S1, selecting materials, namely selecting the lithium ore with complete product phase as a manufacturing material by adopting a flotation method, namely obtaining the more complete lithium ore by a process of floating solid minerals from a water suspension (namely ore pulp), wherein the flotation method in S1 is a process of floating solid minerals from a water suspension (namely ore pulp) so as to obtain the more complete lithium ore, and introducing air into the ore pulp during flotation so as to form a large amount of bubbles, so that particles (namely water-based minerals) which are not easily wetted by water are attached to the bubbles and float to the surface of the ore pulp along with the bubbles to form a mineralized foam layer; the particles which are easy to be wetted by water (namely hydrophilic minerals) can not be attached to the air bubbles and remain in the ore pulp, thereby achieving the effect of flotation;
s2, drying, namely further drying the ore floated in the S1, wherein in the S2, a common drying furnace can be adopted for heating and drying, the drying time is determined by the amount of the lithium ore, and the drying time of one ton of lithium ore is preferably controlled to be 2-3 hours;
s3, grinding, namely grinding the dried lithium ore in the step S2 to obtain lithium ore powder, and grinding the lithium ore in the step S3, wherein firstly, the lithium ore is put into a grinder to be ground, and the ground lithium ore is put into a grinder to be ground after being ground, and the grinding granularity is preferably kept at 305-400 mm;
s4, roasting, namely placing the lithium ore powder obtained in the step S3 in a roasting furnace for roasting, and simultaneously adding a reactant into the lithium ore powder to calcine the lithium ore powder, wherein the roasting temperature is controlled at 1500 ℃, the roasting time is controlled at 3 hours, the powder of lithium chloride and impurities are obtained after roasting is finished, and the reactant in the step S4 can be a mixture of ammonium chloride and calcium chloride;
s5, removing impurities, namely putting the mixed impurities obtained in the S4 into an aqueous solution for dissolving, and then adding sodium carbonate into the solution, so that impurities such as magnesium ions and calcium ions in the solution can be precipitated and removed, and a lithium chloride solution containing the impurities is obtained, wherein a pressure filtration method can be adopted for filtration in the S5, and thus the filtration efficiency of the solution is improved;
s6, filtering, namely filtering the mixed solution in the S5 to filter insoluble impurities in the solution, so as to obtain a relatively pure lithium chloride solution;
and S7, drying, namely heating and drying the lithium chloride solution obtained in the S6, and evaporating excessive water and hydrochloric acid in the mixture to obtain high-purity lithium chloride powder.
From example 3, it can be seen that: the lithium chloride powder prepared by the processing method has low precision, low impurity content and low smoothness, so the preparation temperature and the preparation time of the embodiment 2 are the optimal preparation method.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A roasting process of non-mainstream lithium ore is characterized by comprising the following steps: the specific process steps are as follows:
s1, selecting materials, namely selecting the lithium ore with complete phase as a manufacturing material by adopting a flotation method, namely, obtaining the more complete lithium ore by the process of flotation of solid minerals from a water suspension (namely ore pulp);
s2, drying, and further drying the ore floated in the S1;
s3, grinding, namely grinding the lithium ore dried in the step S2 to obtain lithium ore powder;
s4, roasting, namely placing the lithium ore powder obtained in the step S3 in a roasting furnace for roasting, and simultaneously adding a reactant into the lithium ore powder to calcine the lithium ore powder, wherein the roasting temperature is controlled to be 1000-1500 ℃, the roasting time is controlled to be 2-3 hours, and the powder of lithium chloride and impurities are obtained after roasting is finished;
s5, removing impurities, namely putting the mixed impurities obtained in the S4 into an aqueous solution for dissolving, and then adding sodium carbonate into the solution, so that impurities such as magnesium ions and calcium ions in the solution can be removed through precipitation, and a lithium chloride solution containing the impurities is obtained;
s6, filtering, namely filtering the mixed solution in the S5 to filter insoluble impurities in the solution, so as to obtain a relatively pure lithium chloride solution;
and S7, drying, namely heating and drying the lithium chloride solution obtained in the S6, and evaporating excessive water and hydrochloric acid in the mixture to obtain high-purity lithium chloride powder.
2. The process of claim 1, wherein the roasting process comprises: the flotation method in S1 is a process of floating solid minerals from a water suspension (namely, ore pulp) to obtain relatively complete lithium ore, air is introduced into the ore pulp during flotation to form a large amount of bubbles, particles (namely, water-based minerals) which are not easy to be wetted by water are attached to the bubbles, and the particles float to the surface of the ore pulp along with the bubbles to form a mineralized foam layer; and the particles which are easily wetted by water (namely hydrophilic minerals) can not be attached to the air bubbles and are left in the ore pulp, so that the flotation effect is achieved.
3. The process of claim 1, wherein the roasting process comprises: s2, heating and drying by using a common drying furnace, wherein the drying time is determined by the amount of the lithium ore, and the drying time of one ton of the lithium ore is preferably controlled to be 2-3 hours.
4. The process of claim 1, wherein the roasting process comprises: in the step S3, the lithium ore is ground by placing the lithium ore into a grinder for grinding, and then placing the ground lithium ore into a grinder for grinding, wherein the grinding particle size is preferably maintained at 305-400 mm.
5. The process of claim 1, wherein the roasting process comprises: the reactant in S4 may be a mixture of ammonium chloride and calcium chloride.
6. The process of claim 1, wherein the roasting process comprises: the filtration in S5 may be performed by pressure filtration, thereby improving the filtration efficiency of the solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262251.9A CN112357936A (en) | 2020-11-12 | 2020-11-12 | Roasting process of non-mainstream lithium ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262251.9A CN112357936A (en) | 2020-11-12 | 2020-11-12 | Roasting process of non-mainstream lithium ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112357936A true CN112357936A (en) | 2021-02-12 |
Family
ID=74514618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011262251.9A Pending CN112357936A (en) | 2020-11-12 | 2020-11-12 | Roasting process of non-mainstream lithium ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112357936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990357A (en) * | 2022-06-27 | 2022-09-02 | 江西理工大学 | Lithium extraction method for high-sulfur high-alkali lepidolite concentrate smelting slag |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365180A (en) * | 2016-08-29 | 2017-02-01 | 西南化工研究设计院有限公司 | Technology for extracting high-purity lithium chloride from lithium ore |
-
2020
- 2020-11-12 CN CN202011262251.9A patent/CN112357936A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365180A (en) * | 2016-08-29 | 2017-02-01 | 西南化工研究设计院有限公司 | Technology for extracting high-purity lithium chloride from lithium ore |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990357A (en) * | 2022-06-27 | 2022-09-02 | 江西理工大学 | Lithium extraction method for high-sulfur high-alkali lepidolite concentrate smelting slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2851786C (en) | Processing of lithium containing material | |
| CN102531002B (en) | Method for purifying lithium carbonate | |
| CN100469697C (en) | Method for producing low-magnesium battery-stage lithium carbonate from lithium sulfate solution | |
| CN111960445B (en) | Method for preparing battery-grade lithium carbonate by using lithium sulfate coarse ore and recycling by-products | |
| CN113428882B (en) | Method for preparing battery-grade lithium carbonate from spodumene | |
| JP2018502995A (en) | Treatment of lithium-containing materials including performing HCl sparge | |
| CN108275703B (en) | Process for preparing lithium carbonate and potassium salt by using lithium-containing nanofiltration produced water | |
| CN112624161B (en) | Method for preparing lithium carbonate by extracting lithium from mechanically activated lepidolite | |
| CN112374512A (en) | Method for preparing battery-grade lithium carbonate by removing impurities from lepidolite clinker | |
| CN105152187A (en) | Method for extracting lithium chloride from high lithium salt lake brine | |
| CN115893449B (en) | Method for producing electronic grade sodium fluoride by using industrial grade sodium-alkali mixed solution | |
| CN115321563A (en) | Method for producing battery-grade lithium carbonate by leaching spodumene ore with nitric acid under pressure | |
| CN104445277A (en) | Method for separating potassium oxide from potassium-containing sodium aluminate solution | |
| CN112357936A (en) | Roasting process of non-mainstream lithium ore | |
| CN110817907B (en) | Treatment system and method for purifying high-purity lithium carbonate | |
| CN102921553B (en) | Method for flotation of lithium potassium sulfate in mixture of lithium potassium sulfate and sodium chloride | |
| CN108428893B (en) | Preparation method of brine lithium carbonate | |
| CN109678183A (en) | A kind of method that technical grade soluble lithium salt prepares lithium hydroxide | |
| CN110923452A (en) | Process for recovering potassium and sodium salts from lithium-precipitated liquid of lepidolite by using ethanol | |
| CN102120592B (en) | Method for extracting lithium carbonate by flotation of mixed salt of NaCl and lithium carbonate | |
| CN115448273A (en) | Method for preparing lithium dihydrogen phosphate by using lepidolite as raw material | |
| CN1482063A (en) | Process for preparing potassium sulfate | |
| CN112293721A (en) | Edible refined salt and production method thereof | |
| CN111943237B (en) | Method for preparing battery grade lithium carbonate by using lithium sulfate coarse ore | |
| CN101318670A (en) | Processing technique for extracting lithium salt from lithium containing salt lake bittern water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |
|
| RJ01 | Rejection of invention patent application after publication |