CN104694736A - Calcium roasting floatation separation method for bastnaesite - Google Patents
Calcium roasting floatation separation method for bastnaesite Download PDFInfo
- Publication number
- CN104694736A CN104694736A CN201510126812.5A CN201510126812A CN104694736A CN 104694736 A CN104694736 A CN 104694736A CN 201510126812 A CN201510126812 A CN 201510126812A CN 104694736 A CN104694736 A CN 104694736A
- Authority
- CN
- China
- Prior art keywords
- hamartite
- add
- rare earth
- separation method
- oxalate
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of mineral processing, and relates to a calcium roasting floatation separation method for bastnaesite. The method comprises the following steps that firstly, bastnaesite and calcium hydroxide are mixed and roasted to obtain roasted ore; secondly, the roasted ore is placed in a floatation tank of a floatation machine, and water is added to form ore pulp; thirdly, water glass, oxalic acid or oxalate, sodium oleate and second oil are added in sequence and stirred, and roughing concentrate and roughing tailings are obtained through floatation; fourthly, the rouging tailings are scavenged in a five-nine level mode, and the calcium fluoride enrichment and the rare earth oxide are obtained. According to the method, the production procedure is shortened, meanwhile, consumption of reagent is reduced, resource utilization of valuable elements is achieved, the economic benefits are increased, and the environmental pollution is reduced.
Description
Technical field
The invention belongs to technical field of mineral processing, particularly a kind of calcification baking flotation separation method of hamartite.
Background technology
Hamartite is one of main rare-earth mineral in the whole world, and mineralogical chemistry formula is RECO
3f, can regard the complex chemical compound of a kind of rare earth fluorine and rare earth carbonate as; Hamartite content of rare earth is high, and rare earth oxide content can reach about 70%, and wherein based on light rare earths, the content of cerium and lanthanum accounts for 70 ~ 90%, is the main source of light rare earths, has important industrial significance and economic worth.
Sichuan Liangshan District rare-earth mineral is hamartite important in the world, and wherein Mianning County deposit scale is maximum; Hamartite production technique main is at present oxidizing roasting-Leaching in Hydrochloric Acid-sodium hydroxide decomposition method, mineral are by other difficult cerium dioxide enriched substance of decomposing mineral composition such as cerium dioxide, rare earth fluorine, Calcium Fluoride (Fluorspan) through the filter residue that oxidizing roasting, Leaching in Hydrochloric Acid obtain, need with the further Extraction of rare earth of sodium hydroxide, and alkali turn after obtain alkali slurry containing a large amount of alkali and fluorochemical, need washing, so need in producing to consume a large amount of sodium hydroxide, there is the problem of fluoride waste contaminate environment and waste resource simultaneously; Therefore, the clean metallurgical flow process developing valuable resource such as high-level efficiency comprehensive utilization rare earth, fluorine etc. is still important research topic.
The method that patent discloses a kind of ammonium chloride Roasting Decomposition hamartite recovery carbonated rare earth of application number 99106149.7, the method is that hamartite is levigate, then with NH
4cl and CaCl
2ground and mixed is even, and roasting makes the rare earth in mineral change into RECl
3, then hot water leaching, adopts the rare earth in ammonium bicarbonate precipitation leach liquor to obtain carbonated rare earth product; The feature of this method does not add soda acid, and reaction conditions is gentle, low in the pollution of the environment, but fluorine does not get utilization.
Application number 200610114588.9 patent discloses a kind of method for decomposing hamartite, roasting after hamartite is mixed with carbonated rare earth, the cerium in carbonated rare earth is utilized to be solidified by the fluorine in hamartite, carry out acid dipping separation cerium and non-Ce rare earth more afterwards, fluorine is stayed in rich cerium slag, avoids the pollution of fluorine.
Application number 201010517433.6 patent discloses a kind of activation after leach the method for Bastnaesite again, the method is that after Leaching in Hydrochloric Acid sedimentation and filtration, extracting and separating obtains rare earth chloride by hamartite at 100 ~ 400 DEG C of calcination activations.
Application number be 201310125757.9 a kind of calcification that patent discloses to make the transition-leach the method for Bastnaesite, carry out according to following steps: the activating pretreatment → activation ore deposit calcification pre-treatment → slag acidleach transition transition → rare earth chloride seminal fluid extraction of rare earth ore concentrate, finally obtain the solution of thorium scum and Cerium II Chloride, Lanthanum trichloride, praseodymium chloride or Neodymium trichloride, rare earth element, fluorine element, thorium element etc. there are is valency constituent element high efficiency separation, but needs equally to add sodium hydroxide in preprocessing process in transition.
Above-mentioned several method has complex process, and cost is higher, and fluorine such as not to get utilization at the shortcoming.
Summary of the invention
For the problems referred to above that existing hamartite smelting separation process exists, the invention provides a kind of calcification baking flotation separation method of hamartite, be separated by calcification baking, pneumatic flotation and obtain Calcium Fluoride (Fluorspan) and rareearth enriching material, on the basis of Simplified flowsheet, rare earth and fluorine are obtained for efficiency utilization.
The calcification baking flotation separation method of hamartite of the present invention carries out according to the following steps:
1, by hamartite with calcium hydroxide according to mass ratio (3 ~ 7): 1 mixes, and in 500 ~ 800 DEG C of roastings 2 ~ 4 hours, is cooled to normal temperature, obtain roasted ore;
2, roasted ore is placed in the flotation cell of flotation machine, adds water and stir into the ore pulp that concentration is 200 ~ 400g/L, then slurry pH is adjusted to 7 ~ 10;
3, in ore pulp, add water glass and stir, then add oxalic acid or oxalate and stir, then add sodium oleate and stir, then add No. two oil and stir, the churning time after often kind of medicament adds is 3 ~ 5min; Wherein the add-on of water glass is by 0.2 ~ 0.8g/kg hamartite, and the add-on of oxalic acid or oxalate is by 1 ~ 3g/kg hamartite, and the add-on of sodium oleate is by 0.2 ~ 0.8g/kg hamartite, and No. two oily add-ons are by 0.5 ~ 2mL/kg hamartite; Then open flotation machine charging valve, air-blowing started to scrape bubble after one minute, obtained rougher concentration and rougher tailings;
4, carry out 5 ~ 9 grades to rougher tailings to scan, at different levels scanning is added medicament according to the mode of step 3 and scans, the mine tailing scanned at different levels enters next stage and scans, and as total concentrate after the scavenger concentrate scanned at different levels mixes with rougher concentration, the mine tailing of scanning of last step scanning is total mine tailing; Total concentrate is Calcium Fluoride (Fluorspan) enriched substance, and total mine tailing is rare earth oxide.
In aforesaid method, the rougher concentration of step 3 is foam segment, and rougher tailings is flotation cell Minerals.
The composition of above-mentioned hamartite counts 30 ~ 70% with REO, fluorine-containing 3 ~ 10% containing rare earth oxide by weight percentage.
Above-mentioned oxalate is sodium oxalate, potassium oxalate or caoxalate.
In aforesaid method, slurry pH is regulated to be the dilute hydrochloric acid or the sodium carbonate solution that adopt 1mol/L.
In aforesaid method, the purity by weight of the rare earth oxide of acquisition is 90 ~ 98%, and rare earth yield reaches 90 ~ 95%.
In aforesaid method, the rate of recovery of fluorine reaches 95 ~ 98%.
In method of the present invention, the principal reaction equation of calcification baking is:
Ca(OH)
2=CaO+H
2O；
REFCO
3=REOF(CeOF)+CO
2↑；
2REOF+CaO=RE
2O
3+CaF
2；
CaO+CO
2=CaCO
3；
2Ce
2O
3+O
2=4CeO
2。
In above-mentioned Calcium Fluoride (Fluorspan) enriched substance, the weight content of Calcium Fluoride (Fluorspan) is 50 ~ 60%.
Compared with prior art, feature of the present invention and beneficial effect thereof are:
The present invention adopts calcification baking flotation separation method process hamartite, and obtain higher-grade rare earth oxide, rare earth yield is high.Compared with the prior art, without the participation of soda acid, Production Flow Chart obtains shortening, decreases the consumption of reagent simultaneously, is conducive to increasing economic efficiency; In Calcium Fluoride (Fluorspan) enriched substance, Calcium Fluoride Content is higher simultaneously, and other are mainly barium sulfate, and can be used as the raw material producing fluorite, the fluorine rate of recovery is high, and valuable element gets utilization, and improves economic benefit, reduces environmental pollution.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the calcification baking flotation separation method of hamartite in the embodiment of the present invention 1;
Fig. 2 is the flotation separation part run schematic diagram in the embodiment of the present invention 1.
Embodiment
The calcium hydroxide adopted in the embodiment of the present invention, water glass, oxalic acid, potassium oxalate, caoxalate, sodium oxalate, sodium oleate and No. two oil (pine camphor oil) are commercial Industrial products.
In the embodiment of the present invention, the rate of recovery employing Shanghai essence scientific & technical corporation UV755B single beam ultraviolet-visible spectrophotometer of fluorine records in solution and is obtained by calculating after fluorinion concentration.
The hamartite adopted in the embodiment of the present invention is selected from the bastnaesite concentrate that Mianning County, Sichuan Province produces.
Embodiment 1
The composition of the hamartite adopted counts 60% with REO, fluorine-containing 7% containing rare earth oxide by weight percentage;
Hamartite is mixed according to mass ratio 5:1 with calcium hydroxide, in 650 DEG C of roastings 3 hours, is cooled to normal temperature, obtain roasted ore;
Roasted ore is placed in the flotation cell of flotation machine, adds water and stir into the ore pulp that concentration is 200g/L, then with the dilute hydrochloric acid of 1mol/L, slurry pH is adjusted to 8;
In ore pulp, add water glass and stir, then add sodium oxalate and stir, then add sodium oleate and stir, then add No. two oil and stir, the churning time after often kind of medicament adds is 3min; Wherein the add-on of water glass presses 0.2g/kg hamartite, and the add-on of sodium oxalate presses 2g/kg hamartite, and the add-on of sodium oleate presses 0.8g/kg hamartite, and No. two oily add-ons press 2mL/kg hamartite; Then open flotation machine charging valve, air-blowing started to scrape bubble after one minute, obtained rougher concentration (foam segment) and rougher tailings (flotation cell Minerals);
Carry out 7 grades to rougher tailings to scan, at different levels scanning is added medicament according to the mode of step 3 and scans, the mine tailing scanned at different levels enters next stage and scans, and as total concentrate after the scavenger concentrate scanned at different levels mixes with rougher concentration, the mine tailing of scanning of last step scanning is total mine tailing; Total concentrate is Calcium Fluoride (Fluorspan) enriched substance, and total mine tailing is rare earth oxide;
The purity by weight of rare earth oxide is 97%, and rare earth yield reaches 94%; The rate of recovery of fluorine reaches 96%; In Calcium Fluoride (Fluorspan) enriched substance, the weight content of Calcium Fluoride (Fluorspan) is 53%.
Embodiment 2
The composition of the hamartite adopted counts 30% with REO, fluorine-containing 3% containing rare earth oxide by weight percentage;
Method is with embodiment 1, and difference is:
(1) hamartite is mixed according to mass ratio 3:1 with calcium hydroxide, in 500 DEG C of roastings 4 hours;
(2) add water and stir into the ore pulp that concentration is 300g/L, then with the sodium carbonate solution of 1mol/L, slurry pH is adjusted to 10;
(3) add water glass, potassium oxalate, sodium oleate and No. two oil successively, the churning time after often kind of medicament adds is 4min; Add-on presses water glass 0.4g/kg hamartite respectively, potassium oxalate 3g/kg hamartite, sodium oleate 0.6g/kg hamartite, No. two oily 1.5mL/kg hamartites;
(4) carry out 5 grades to rougher tailings to scan, the purity by weight of the rare earth oxide of acquisition is 93%, and rare earth yield reaches 92%; The rate of recovery of fluorine reaches 96%; In Calcium Fluoride (Fluorspan) enriched substance, the weight content of Calcium Fluoride (Fluorspan) is 54%.
Embodiment 3
The composition of the hamartite adopted counts 70% with REO, fluorine-containing 10% containing rare earth oxide by weight percentage;
Method is with embodiment 1, and difference is:
(1) hamartite is mixed according to mass ratio 7:1 with calcium hydroxide, in 800 DEG C of roastings 2 hours;
(2) add water and stir into the ore pulp that concentration is 350g/L, then with the dilute hydrochloric acid of 1mol/L, slurry pH is adjusted to 7;
(3) add water glass, caoxalate, sodium oleate and No. two oil successively, the churning time after often kind of medicament adds is 5min; Add-on presses water glass 0.6g/kg hamartite respectively, caoxalate 2g/kg hamartite, sodium oleate 0.4g/kg hamartite, No. two oily 1mL/kg hamartites;
(4) carry out 9 grades to rougher tailings to scan, the purity by weight of the rare earth oxide of acquisition is 90%, and rare earth yield reaches 95%; The rate of recovery of fluorine reaches 98%; In Calcium Fluoride (Fluorspan) enriched substance, the weight content of Calcium Fluoride (Fluorspan) is 60%.
Embodiment 4
The composition of the hamartite adopted counts 50% with REO, fluorine-containing 5% containing rare earth oxide by weight percentage;
Method is with embodiment 1, and difference is:
(1) hamartite is mixed according to mass ratio 6:1 with calcium hydroxide, in 580 DEG C of roastings 3 hours;
(2) add water and stir into the ore pulp that concentration is 400g/L, then with the sodium carbonate solution of 1mol/L, slurry pH is adjusted to 9;
(3) add water glass, oxalic acid, sodium oleate and No. two oil successively, the churning time after often kind of medicament adds is 4min; Add-on presses water glass 0.8g/kg hamartite respectively, oxalic acid 1g/kg hamartite, sodium oleate 0.2g/kg hamartite, No. two oily 0.5mL/kg hamartites;
(4) carry out 7 grades to rougher tailings to scan, the purity by weight of the rare earth oxide of acquisition is 98%, and rare earth yield reaches 90%; The rate of recovery of fluorine reaches 95%; In Calcium Fluoride (Fluorspan) enriched substance, the weight content of Calcium Fluoride (Fluorspan) is 50%.
Claims (7)
1. a calcification baking flotation separation method for hamartite, is characterized in that carrying out according to the following steps:
(1) by hamartite with calcium hydroxide according to mass ratio (3 ~ 7): 1 mixes, and in 500 ~ 800 DEG C of roastings 2 ~ 4 hours, is cooled to normal temperature, obtain roasted ore;
(2) roasted ore is placed in the flotation cell of flotation machine, adds water and stir into the ore pulp that concentration is 200 ~ 400g/L, then slurry pH is adjusted to 7 ~ 10;
(3) in ore pulp, add water glass and stir, then add oxalic acid or oxalate and stir, then add sodium oleate and stir, then add No. two oil and stir, the churning time after often kind of medicament adds is 3 ~ 5min; Wherein the add-on of water glass is by 0.2 ~ 0.8g/kg hamartite, and the add-on of oxalic acid or oxalate is by 1 ~ 3g/kg hamartite, and the add-on of sodium oleate is by 0.2 ~ 0.8g/kg hamartite, and No. two oily add-ons are by 0.5 ~ 2mL/kg hamartite; Then open flotation machine charging valve, air-blowing started to scrape bubble after one minute, obtained rougher concentration and rougher tailings;
(4) carry out 5 ~ 9 grades to rougher tailings to scan, at different levels scanning is added medicament according to the mode of step 3 and scans, the mine tailing scanned at different levels enters next stage and scans, and as total concentrate after the scavenger concentrate scanned at different levels mixes with rougher concentration, the mine tailing of scanning of last step scanning is total mine tailing; Total concentrate is Calcium Fluoride (Fluorspan) enriched substance, and total mine tailing is rare earth oxide.
2. the calcification baking flotation separation method of a kind of hamartite according to claim 1, is characterized in that the composition of described hamartite counts 30 ~ 70% with REO, fluorine-containing 3 ~ 10% containing rare earth oxide by weight percentage.
3. the calcification baking flotation separation method of a kind of hamartite according to claim 1, is characterized in that described oxalate is sodium oxalate, potassium oxalate or caoxalate.
4. the calcification baking flotation separation method of a kind of hamartite according to claim 1, is characterized in that regulating slurry pH to be the dilute hydrochloric acid or the sodium carbonate solution that adopt 1mol/L.
5. the calcification baking flotation separation method of a kind of hamartite according to claim 1, it is characterized in that the purity by weight of described rare earth oxide is 90 ~ 98%, rare earth yield reaches 90 ~ 95%.
6. the calcification baking flotation separation method of a kind of hamartite according to claim 1, is characterized in that the rate of recovery of fluorine reaches 95 ~ 98%.
7. the calcification baking flotation separation method of a kind of hamartite according to claim 1, is characterized in that the weight content of Calcium Fluoride (Fluorspan) in described Calcium Fluoride (Fluorspan) enriched substance is 50 ~ 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126812.5A CN104694736B (en) | 2015-03-23 | 2015-03-23 | Calcium roasting floatation separation method for bastnaesite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126812.5A CN104694736B (en) | 2015-03-23 | 2015-03-23 | Calcium roasting floatation separation method for bastnaesite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104694736A true CN104694736A (en) | 2015-06-10 |
| CN104694736B CN104694736B (en) | 2017-01-11 |
Family
ID=53342280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510126812.5A Active CN104694736B (en) | 2015-03-23 | 2015-03-23 | Calcium roasting floatation separation method for bastnaesite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104694736B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554620A (en) * | 2018-04-28 | 2018-09-21 | 武汉科技大学 | A kind of method that calcirm-fluoride is recycled in dolomite type magnetic iron ore magnetic tailing |
| CN109225606A (en) * | 2018-09-11 | 2019-01-18 | 洛阳冀能新材料有限公司 | A kind of separation system and sorting process of carbonate-type fluorite ore |
| CN114804179A (en) * | 2022-06-02 | 2022-07-29 | 中南大学 | Method for recovering high-purity calcium fluoride from fluorine-containing waste residues |
| CN115722347A (en) * | 2022-10-25 | 2023-03-03 | 昆明理工大学 | Method for separating lead and antimony from paragenetic ore |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867836A (en) * | 1981-10-15 | 1983-04-22 | Dowa Mining Co Ltd | Decomposition of bastnaesite ore |
| CN1063058A (en) * | 1991-12-31 | 1992-07-29 | 广州有色金属研究院 | Fluorite technology and adjustment agent composition thereof |
| CN102886312A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Mineral sorting method for separating bastnaesite and monazite from high-grade mixed rare-earth concentrate |
| CN102886300A (en) * | 2012-10-19 | 2013-01-23 | 内蒙古科技大学 | Ore separation method for recycling scandium from bayan obo tailings |
| CN103184332A (en) * | 2013-03-29 | 2013-07-03 | 四川省彭山宇力化工有限公司 | Method for roasting, converting and resolving fluorocarbon cerium rare earth mine by adding covering agent to calcium compound |
| CN103627915A (en) * | 2013-11-22 | 2014-03-12 | 四川省彭山宇力化工有限公司 | Method of roasting, converting and decomposing fluorine-containing rear earth by calcium compound |
-
2015
- 2015-03-23 CN CN201510126812.5A patent/CN104694736B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867836A (en) * | 1981-10-15 | 1983-04-22 | Dowa Mining Co Ltd | Decomposition of bastnaesite ore |
| CN1063058A (en) * | 1991-12-31 | 1992-07-29 | 广州有色金属研究院 | Fluorite technology and adjustment agent composition thereof |
| CN102886312A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Mineral sorting method for separating bastnaesite and monazite from high-grade mixed rare-earth concentrate |
| CN102886300A (en) * | 2012-10-19 | 2013-01-23 | 内蒙古科技大学 | Ore separation method for recycling scandium from bayan obo tailings |
| CN103184332A (en) * | 2013-03-29 | 2013-07-03 | 四川省彭山宇力化工有限公司 | Method for roasting, converting and resolving fluorocarbon cerium rare earth mine by adding covering agent to calcium compound |
| CN103627915A (en) * | 2013-11-22 | 2014-03-12 | 四川省彭山宇力化工有限公司 | Method of roasting, converting and decomposing fluorine-containing rear earth by calcium compound |
Non-Patent Citations (2)
| Title |
|---|
| 吴文远: "轻稀土矿物选冶联合流程", 《全国稀土化学与冶金学术研讨会暨中国稀土学会稀土化学与湿法冶金、稀土火法冶金专业委员会工作会议论文摘要集》 * |
| 杨和平等: "湖南衡南萤石尾矿选矿试验研究", 《矿产保护与利用》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554620A (en) * | 2018-04-28 | 2018-09-21 | 武汉科技大学 | A kind of method that calcirm-fluoride is recycled in dolomite type magnetic iron ore magnetic tailing |
| CN109225606A (en) * | 2018-09-11 | 2019-01-18 | 洛阳冀能新材料有限公司 | A kind of separation system and sorting process of carbonate-type fluorite ore |
| CN114804179A (en) * | 2022-06-02 | 2022-07-29 | 中南大学 | Method for recovering high-purity calcium fluoride from fluorine-containing waste residues |
| CN114804179B (en) * | 2022-06-02 | 2024-06-04 | 华南理工大学 | Method for recycling high-purity calcium fluoride from fluorine-containing waste residues |
| CN115722347A (en) * | 2022-10-25 | 2023-03-03 | 昆明理工大学 | Method for separating lead and antimony from paragenetic ore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104694736B (en) | 2017-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105886798B (en) | The method that phosphorus and rare earth are recycled from containing rare earth phosphate rock | |
| CN103397213B (en) | Method for decomposing and extracting Baotou rare earth ore through mixed alkali roasting process | |
| CN104694736B (en) | Calcium roasting floatation separation method for bastnaesite | |
| CN105271632A (en) | Comprehensive recovery method for electroplating sludge | |
| CN103103349B (en) | Method for decomposing bayan obo rare earth ore concentrate by acid and alkali combination at low temperature | |
| CN106745016B (en) | A method of separation and concentration lithium, aluminium, silicon from flyash | |
| CN110042226A (en) | A method of plus iron low temperature concentrated sulfuric acid roasting decomposes high-grade mixed rare earth concentrates | |
| CN106319247B (en) | The method of phosphorus and rare earth is recycled from containing rare earth phosphate rock | |
| CN102051477A (en) | Method for chemically separating bastnaesite and urdite from mixed rare earth concentrate | |
| CN109439929B (en) | Method for decomposing wolframite and wolframite mixed ore by alkaline system | |
| CN109988903A (en) | A kind of method that concentrated sulfuric acid two-stage roasting decomposes high-grade mixed rare earth concentrates | |
| CN106048265A (en) | Extraction method of rare-earth elements from bastnaesite | |
| CN105331812B (en) | The method of synthetical recovery phosphorus and rare earth from phosphorus ore containing mengite rare-earth | |
| CN101126164B (en) | Method for producing electrolytic zinc from zinc material with high-content of fluorin and silicon dioxide | |
| CN103184334A (en) | Selection-smelting combined technology for treating mixed ore containing molybdenum, oxygen, sulfur and copper | |
| CN105110373A (en) | Vanadium oxide cleaner production method and recovery method of acid leaching slags in vanadium oxide cleaner production | |
| CN102828034B (en) | Method for producing high-purity zinc oxide through decarbonization on low-grade zinc oxide ore by adopting ammonia process | |
| CN105441674B (en) | From the method for synthetical recovery phosphorus and rare earth in phosphorus ore containing monazite | |
| CN104841563B (en) | A kind of multistage foam flotation method of titanium chloride slag | |
| CN104531987B (en) | A kind of method reduced rich in Gypsum Fibrosum Alkaline uranium ore stone leaching alkaline consumption | |
| CN103395792A (en) | White carbon black preparation method | |
| CN103539242A (en) | Method used for reducing calcium content of rare earth industrial wastewater | |
| CN110732543B (en) | Method for jointly producing cement clinker and ammonia water by electrolyzing metal manganese waste residue and gypsum | |
| CN104141044A (en) | Method for recycling and refining nickel and cadmium in solid hazardous wastes | |
| CN104291540A (en) | Resourceful treatment method for red mud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |