CN102847611A - Sulfur concentrate purifying method - Google Patents
Sulfur concentrate purifying method Download PDFInfo
- Publication number
- CN102847611A CN102847611A CN2011101740921A CN201110174092A CN102847611A CN 102847611 A CN102847611 A CN 102847611A CN 2011101740921 A CN2011101740921 A CN 2011101740921A CN 201110174092 A CN201110174092 A CN 201110174092A CN 102847611 A CN102847611 A CN 102847611A
- Authority
- CN
- China
- Prior art keywords
- sulphur
- purification
- sulphur concentrate
- concentrate
- screen cloth
- 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.)
- Granted
Links
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000012141 concentrate Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000011593 sulfur Substances 0.000 title abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 title abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 9
- 239000005864 Sulphur Substances 0.000 claims description 57
- 238000005188 flotation Methods 0.000 claims description 32
- 238000000746 purification Methods 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 10
- SARKRSWCLHYVGQ-UHFFFAOYSA-N ethoxymethanedithioic acid;sodium Chemical compound [Na].CCOC(S)=S SARKRSWCLHYVGQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000003112 inhibitor Substances 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 5
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 8
- 239000012991 xanthate Substances 0.000 description 8
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 6
- 239000002516 radical scavenger Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 229910052683 pyrite Inorganic materials 0.000 description 4
- 239000011028 pyrite Substances 0.000 description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000010410 dusting Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 enters recleaning Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sulfur concentrate purifying method. The sulfur concentrate is subjected to slurry mixing and slag separation, classification grinding, once roughing, three times of scavenging and five times of concentration. Through the method disclosed by the invention, the purity of the purified high-grade sulfur concentrate reaches 95.05-98.78%; by the method, middle-grade sulfur concentrate can be obtained and the remaining sulfur elements can be recycled; and through the method, the sulfur grade of the tailings is less than or equal to 0.5%, the added value of the ore is increased, and the sulfur resource is efficiently recycled.
Description
Technical field
The present invention relates to a kind of method of purification of ore, specifically, is a kind of method of purification of sulphur concentrate.
Background technology
China is a very abundant country of sulphur resource, usually occur with the form of troilite at the occurring in nature element sulphur, in general, troilite is mainly for the production of sulfuric acid, but because the pyrite Ore rich ore is few, lean ore is many, major part all is that grade is 12 ~ 35% middle low-grade ore, if troilite sulfur-bearing grade is not high, then can produce a large amount of unserviceable slags, the iron oxide particle that its reason generates when being iron sulfide oxidizing roasting is fine, specific area is large, highly finely divided, severe contamination nonmetallic mineral surface, or generate solid solution because of the quartz fusing, therefore the quality of so direct impact boiling furnace gas need to purify to the sulphur ore deposit of exploitation.At present purification mainly is by forming ore pulp behind the fragmentation of ore process, the ore grinding, then feeding spiral chute roughly selects, then obtain finished product behind the table concentration, although this method can obtain the sulphur grade greater than 50% finished product, but this method can produce a large amount of waste materials, also contain certain sulphur in these waste materials, and utilize said method can't the sulphur in the waste material be reclaimed, the result has just caused the waste of ample resources.
Summary of the invention
The object of the present invention is to provide a kind of method of purification of brand-new sulphur concentrate, it extracts the most of sulphur in the sulphur concentrate, thereby realizes the high efficiente callback of sulphur resource.
The present invention adopts following technological means to be realized:
A kind of method of purification of sulphur concentrate may further comprise the steps:
1) stirring is sized mixing;
2) every slag;
3) ore grinding;
4) dosing is sized mixing;
5) roughing flotation and scanning;
6) selected after the flotation;
Described sulphur concentrate is the sulphur concentrate of sulphur grade 30 ~ 33%, granularity-200 order 50 ~ 60%, sizing mixing and scan in the step in described dosing adds ethoxy-dithioformic acid sodium solution and terpenic oil, and its addition is respectively dosing and sizes mixing and add ethoxy-dithioformic acid sodium solution 60 ~ 90g/t, terpenic oil 36 ~ 60g/t in the step; Scan and add ethoxy-dithioformic acid sodium solution 40 ~ 60g/t, terpenic oil 24 ~ 40g/t in the step.
As a kind of improvement of the present invention, in ball mill, add adjusting agent Na
2CO
31100 ~ 1900g/t is used for adjusting pulp PH value; Inhibitor Na
2SiO
31000 ~ 1500g/t is used for suppressing gangue mineral.
As a kind of improvement of the present invention, describedly adopt cylinder to process every ballast screen every the slag step, its sieve aperture is 2 * 2mm.
As another kind of improvement the of the present invention, utilizing screen cloth to sieve to the sulphur concentrate behind slag before the ore grinding, described screen cloth comprises that sieve aperture is that screen cloth and the sieve aperture of 0.5 * 0.5mm is the screen cloth of 0.1 * 0.1mm, and the screen cloth of described 0.5 * 0.5mm is arranged on the top that sieve aperture is the screen cloth of 0.1 * 0.1mm.
As another kind of improvement of the present invention, described roughly selecting and selected employing inflating mechanical agitated flotation cell.
As another kind of improvement the of the present invention, described roughly selecting carried out once, and described scanning carried out three times, described selected carrying out five times.
Reached 95.05 ~ 98.78% through the highgrade pyrite concentrate purity that obtains behind the Methods For Purification of the present invention, and can obtain middle grade sulphur concentrate simultaneously by this method, it is reclaimed remaining element sulphur, the sulphur grade of the mine tailing that obtains by this method≤0.5%, its ore added value gets a promotion, and the sulphur resource has obtained high efficiency recovery.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with Figure of description the present invention is described in further detail:
The present invention relates to a kind of method of purification of sulphur concentrate, specifically, refer to get rid of to greatest extent quartz and silicate mineral in the sulphur concentrate, iron sulfide is chosen to pure stage.At present, the most high-grade sulphur concentrate sulfur-bearing grade of at present sulfuric acid plant's use is 40 ~ 43%, and it is 20 ~ 25% that this grade sulphur concentrate contains the gangue mineral amount; Its relieving haperacidity slag ferrous grade is 46 ~ 56%; And it is rear so that concentrate sulphur grade brings up to 50 ~ 53% to use method of the present invention the troilite of sulphur grade 30 ~ 33% can be purified.The purifying technique of sulphur concentrate is specific as follows:
One, preliminary treatment
1) in first time agitator, evenly add sulphur concentrate to be purified and water preparation ore pulp, then stir 5min, make sulphur concentrate pulp weight concentration adjust to 35 ~ 40%, make mineral grain suspend, loose.
2) remove foreign material such as plastic skin in the mineral grain with the cylinder of sieve aperture 2 * 2mm every ballast screen.
3) adopt high frequency vibrating fine screen to sieve, described screen cloth is divided into two-layer up and down, upper strata sieve aperture 0.5 * 0.5mm, and the sieve aperture 0.1 * 0.1mm of lower floor sends the product on the two-layer sieve aperture into ball mill and carries out ore grinding, and adds adjusting agent Na in ball mill
2CO
31100 ~ 1900g/t, inhibitor Na
2SiO
31000 ~ 1500g/t returns the dusting cover screening behind the ball mill ore grinding, the lower pulp granularity of lower screen sieve is controlled at＜0.074mm.
4) the lower ore pulp of sieve enters for the second time agitator stirring, and drips ethoxy-dithioformic acid sodium solution (calling xanthate in the following text) 60 ~ 90g/t; Then enter for the third time agitator stirring, and drip terpenic oil (calling 2# oil in the following text) 36 ~ 60g/t, then stir 2 ~ 5min.
Two, purifying and flotation is roughly selected and is scanned
1) ore pulp after will stirring for the third time feeds in the rougher cell, flotation 6min, and froth pulp is iron sulfide and roughly selects concentrate, and the bottom land product is rougher tailings.
2) add xanthate in the groove after roughly select in the product an amount of with 2# oil, flotation 5min, once purging selection finishes, and froth pulp be scavenger concentrate for the first time, and product is to scan mine tailing the first time in the groove, and the once purging selection concentrate returns to be roughly selected, and participates in second batch and roughly selects.
3) continue to add xanthate and 2# oil in the mine tailing in right amount toward scanning for the first time, flotation 5min, secondary is scanned end, froth pulp is the secondary scavenger concentrate, product is that secondary is scanned mine tailing in the groove, and the secondary scavenger concentrate returns in the once purging selection groove, participates in second batch once purging selection.
4) secondary is scanned mine tailing flotation 5min, scans end three times, and froth pulp is three scavenger concentrates, and product is true tailings in the groove, and three times scavenger concentrate returns in the secondary scavenger flotation cell, participates in second batch secondary and scans.
Scan in the operation described, according to the height of sulphur grade, add xanthate 40 ~ 60g/t and 2# oil 24 ~ 40g/t, described roughly selecting with scanning utilizes the inflating mechanical agitated flotation cell to be operated, the sulphur grade of true tailings≤0.5%.
Three, flotation is selected
1) roughly select concentrate and enter for the first time selected flotation cell, mix up mineral slurry level, flotation 5.5min, primary cleaning finishes, and froth pulp is the primary cleaning concentrate, enters recleaning, and product is primary cleaner tailing in the groove, returns to roughly select and participates in second batch and roughly select.
2) the primary cleaning concentrate enters the recleaning flotation cell, carries out recleaning, mixes up mineral slurry level, flotation 4.5min, and froth pulp is the recleaning concentrate, enters triple cleaning, product is the recleaning mine tailing in the groove.
3) the recleaning concentrate enters the triple cleaning flotation cell, carries out triple cleaning, mixes up mineral slurry level, flotation 4.5min, froth pulp is the triple cleaning concentrate, enter four times selected, product is the triple cleaning mine tailing in the groove.
4) the triple cleaning concentrate enters selected flotation cell four times, carry out four times selected, mix up mineral slurry level, flotation 4.5min, froth pulp are four selected concentrate, enter five times selected, product is four cleaner tailings in the groove.
5) four selected concentrate enter selected flotation cell five times, carry out five times selected, flotation 4.5min, froth pulp are five selected concentrate, are final high purity sulphur concentrate, product is five cleaner tailings in the groove.
6) cleaner tailings after recleaning ~ five are time selected merges and obtains middle grade sulphur concentrate.
The selected step of described flotation utilizes the inflating mechanical agitated flotation cell to be operated.
Below by concrete example the present invention is described:
Embodiment 1
The sulphur concentrate of sulfur-bearing grade 32.52%, granularity-200 order 50% in first time agitator, adds water sulphur concentrate weight concentration is adjusted to 35%; Ore pulp enters cylinder every ballast screen, removes the foreign material such as plastic skin; Ore pulp feeds the high frequency vibrating fine screen prescreening under the sieve after the slagging-off, and two layer screen sieve is enterprising to enter the ball mill ore grinding, and adds adjusting agent Na in ball mill
2CO
31100g/t, inhibitor Na
2SiO
31000g/t, ball mill ore discharging return the dusting cover screening, and the lower ore pulp of sieve enters for the second time agitator stirring, and drips xanthate 60g/t; Then enter for the third time agitator stirring, and drip 2# oil 36g/t.
Ore pulp after stirring for the second time feeds the inflating mechanical agitated flotation cell and roughly selects, and the bottom land ore pulp after roughly selecting carries out three times to be scanned, and adds xanthate 40g/t and 2# oil 24g/t, scans the froth pulp that obtains and returns in order and roughly select and scan.Bottom land ore pulp after scanning for the third time is true tailings, sulphur grade≤0.5%.
The froth pulp that roughing flotation is obtained carry out five times selected, the 5th time the selected froth pulp that obtains is highgrade pyrite concentrate, the bottom land ore pulp after sulphur grade 51.84%, the second ~ five times is selected merges and obtains middle grade sulphur concentrate, sulphur grade 29.78%.
Embodiment 2
The sulphur concentrate of sulfur-bearing grade 30.35%, granularity-200 order 55% in first time agitator, adds water sulphur concentrate weight concentration is adjusted to 40%; Ore pulp enters cylinder ore pulp under the sieve after the ballast screen slagging-off and feeds that high frequency vibrating fine screen prescreening two layer screen sieve is enterprising to enter the ball mill ore grinding, and adds adjusting agent Na in ball mill
2CO
31900g/t, inhibitor Na
2SiO
31500g/t, ball mill ore discharging return the dusting cover screening; The lower ore pulp of sieve enters for the second time agitator stirring, and drips xanthate 90g/t; Then enter for the third time agitator stirring, and drip 2# oil 60g/t.
Roughing flotation and scanning: the ore pulp after stirring for the third time feeds the inflating mechanical agitated flotation cell and roughly selects, and the bottom land ore pulp after roughly selecting carries out three times to be scanned, and adds xanthate 60g/t and 2# oil 40g/t, scans the froth pulp that obtains and returns in order and roughly select and scan.Bottom land ore pulp after scanning for the third time is true tailings, sulphur grade≤0.5%.
Flotation is selected: the froth pulp that roughing flotation is obtained carry out five times selected, the 5th time the selected froth pulp that obtains is highgrade pyrite concentrate, the bottom land ore pulp after sulphur grade 49.88%, the second ~ five times is selected merges and obtains middle grade sulphur concentrate, sulphur grade 27.43%.
Claims (8)
1. the method for purification of a sulphur concentrate is characterized in that: may further comprise the steps:
1) stirring is sized mixing;
2) every slag;
3) ore grinding;
4) dosing is sized mixing;
5) roughing flotation and scanning;
6) selected after the flotation;
Described sulphur concentrate is the sulphur concentrate of sulphur grade 30 ~ 33%, granularity-200 order 50 ~ 60%, sizing mixing and scan in the step in described dosing adds ethoxy-dithioformic acid sodium solution and terpenic oil, and its addition is respectively dosing and sizes mixing and add ethoxy-dithioformic acid sodium solution 60 ~ 90g/t, terpenic oil 36 ~ 60g/t in the step; Scan and add ethoxy-dithioformic acid sodium solution 40 ~ 60g/t, terpenic oil 24 ~ 40g/t in the step.
2. in ball mill, add adjusting agent Na
2CO
31100 ~ 1900g/t; Inhibitor Na
2SiO
31000 ~ 1500g/t.
3. the method for purification of a kind of sulphur concentrate according to claim 1 is characterized in that: describedly adopt cylinder to process every ballast screen every the slag step, its sieve aperture is 2 * 2mm.
4. the method for purification of a kind of sulphur concentrate according to claim 2 is characterized in that: utilizing screen cloth to sieve to the sulphur concentrate behind slag before the ore grinding.
5. the method for purification of a kind of sulphur concentrate according to claim 3 is characterized in that: described screen cloth comprises that sieve aperture is that screen cloth and the sieve aperture of 0.5 * 0.5mm is the screen cloth of 0.1 * 0.1mm.
6. the method for purification of a kind of sulphur concentrate according to claim 4, it is characterized in that: the screen cloth of described 0.5 * 0.5mm is arranged on the top that sieve aperture is the screen cloth of 0.1 * 0.1mm.
7. the method for purification of a kind of sulphur concentrate according to claim 5 is characterized in that: described roughly selecting and selected employing inflating mechanical agitated flotation cell.
8. the method for purification of a kind of sulphur concentrate according to claim 6, it is characterized in that: described roughly selecting carried out once, and described scanning carried out three times, described selected carrying out five times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174092.1A CN102847611B (en) | 2011-06-27 | 2011-06-27 | Sulfur concentrate purifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174092.1A CN102847611B (en) | 2011-06-27 | 2011-06-27 | Sulfur concentrate purifying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102847611A true CN102847611A (en) | 2013-01-02 |
| CN102847611B CN102847611B (en) | 2014-04-23 |
Family
ID=47394820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110174092.1A Expired - Fee Related CN102847611B (en) | 2011-06-27 | 2011-06-27 | Sulfur concentrate purifying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102847611B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262883A (en) * | 2020-10-27 | 2021-08-17 | 水口山有色金属有限责任公司 | Flotation method for improving grade of high-sulfur gold concentrate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5753104A (en) * | 1994-07-06 | 1998-05-19 | Boc Gases Australia Limited | Physical separation processes for mineral slurries |
| CN101844108A (en) * | 2010-04-13 | 2010-09-29 | 中南大学 | Floatation separation method for pyrites from arsenopyrites |
-
2011
- 2011-06-27 CN CN201110174092.1A patent/CN102847611B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5753104A (en) * | 1994-07-06 | 1998-05-19 | Boc Gases Australia Limited | Physical separation processes for mineral slurries |
| CN101844108A (en) * | 2010-04-13 | 2010-09-29 | 中南大学 | Floatation separation method for pyrites from arsenopyrites |
Non-Patent Citations (3)
| Title |
|---|
| 刘平安等: "《梅山硫精矿降镁除杂工业应用研究》", 《矿冶工程》, vol. 26, no. 5, 30 October 2006 (2006-10-30) * |
| 衣德强: "《硫精矿提硫降杂工业试验研究》", 《矿业研究与开发》, vol. 24, no. 5, 30 October 2004 (2004-10-30) * |
| 衣德强: "《硫精矿降杂工业试验研究》", 《中国矿山工程》, vol. 34, no. 6, 20 December 2005 (2005-12-20) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262883A (en) * | 2020-10-27 | 2021-08-17 | 水口山有色金属有限责任公司 | Flotation method for improving grade of high-sulfur gold concentrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102847611B (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101549322B (en) | Process of using sulphur lead-zinc containing tailings to prepare sulphur iron ore concentrate | |
| CN104689913B (en) | A kind of method that polycrystalline series troilite mixing is reclaimed | |
| CN102489407B (en) | Mineral processing method for recycling scheelite/molybdenum oxide ores from molybdenum sulfide flotation tailings | |
| CN106076590B (en) | Beneficiation method for separating molybdenum oxide tungsten ore and molybdenum sulfide ore in molybdenum tungsten ore | |
| CN108636591B (en) | Method for recovering quartz from iron tailings | |
| CN105435970B (en) | A kind of ore-dressing technique of copper smelting-furnace slag flotation recycling copper | |
| CN102225374A (en) | Method for recovering iron from pyrite cinder | |
| US20130284642A1 (en) | Method of beneficiation of phosphate | |
| CN111151370A (en) | Production method of high-quality ultra-pure fine iron powder | |
| CN105381868B (en) | Physical beneficiation phosphorus reduction method for skarn type high-phosphorus molybdenum ore | |
| CN107899740A (en) | A kind of high arsenic-bearing pyrite concentrate pozzuolite separation ore-sorting technique containing magnetic iron ore | |
| CN104261361A (en) | Washing and direct flotation method of low-grade refractory argillaceous phosphorite | |
| CN101176863A (en) | Method for sorting and separating ore from aluminum silicon mineral | |
| CN109530095A (en) | A kind of flotation device and flotation column joint gradient extracting method of misproportion dissemination copper sulfide ore | |
| CN115418498B (en) | Treatment method of carbonate lithium clay | |
| CN110293006A (en) | The beneficiation method of sesquichloride in a kind of reduction collophane | |
| CN108178532A (en) | A kind of method of copper ashes flotation tailings comprehensive utilization | |
| CN111482265A (en) | Beneficiation method for strengthening recovery of fine-grain chromite | |
| CN114247559A (en) | Tailing-free ore dressing method for lithium ore recovery | |
| CN106391297B (en) | A kind of beneficiation method of copper and tin sulphide ore | |
| CN104923384A (en) | Low-cost deironing quality-improving beneficiation method for high-impurity-content feldspar quarry | |
| CN105750090A (en) | Silica-calcia bearing phosphate rock separation method | |
| CN105413880A (en) | Beneficiation method for producing low-phosphorus molybdenum concentrate by utilizing ultrasonic waves | |
| CN105540570B (en) | Method for producing medium-carbon and high-carbon crystalline flake graphite by two-step method | |
| CN102847611B (en) | Sulfur concentrate purifying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |