CN107638959A - Flotation method for inhibiting silicate gangue minerals in fluorite ores - Google Patents
Flotation method for inhibiting silicate gangue minerals in fluorite ores Download PDFInfo
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- CN107638959A CN107638959A CN201710669174.0A CN201710669174A CN107638959A CN 107638959 A CN107638959 A CN 107638959A CN 201710669174 A CN201710669174 A CN 201710669174A CN 107638959 A CN107638959 A CN 107638959A
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Abstract
The invention relates to a flotation method for inhibiting silicate gangue minerals in fluorite ores. The technical scheme is as follows: oxalic acid, citric acid, tartaric acid and EDTA complexing agent are added in the ore grinding process to pretreat the ore pulp, and the adding amount of the complexing agent is generally 200-1000 g/t. And sequentially adding sodium carbonate as a pH value regulator, water glass as an inhibitor and a combination of sodium oleate and oxidized paraffin soap as a collecting agent into the ore pulp after ore grinding for flotation. The fluorite ore flotation method can effectively inhibit silicate gangue minerals such as quartz and the like in the fluorite ore and improve the concentrate grade.
Description
Technical field
The invention belongs to technical field of mineral processing, is related to a kind of fluorite ore beneficiation method, suitable for low-grade, silicone content
The flotation of high fluorite ore.
Background technology
Fluorite is a kind of nonmetal mineral resource with strategic importance, and application field covers metallurgy, chemical industry, building materials, pottery
Conventional industries and the new industries such as porcelain, atomic energy industry, fluorination work.Fluorite has been positioned as " eshaustibility by China in policy aspect
And non-renewable precious resources ", then fluorite is referred to as " the second rare earth " in industry, and the country such as the U.S., Europe is also classified as war
Slightly property mineral, every year maintain storage level on certain level.As important Strategic Mineral Resources, the valency of fluorite resource
It is worth self-evident.
China's fluorite resource enriches, the t of fluorite basic unit price 1.1 hundred million, accounts for the 60% of global reserves, but China's fluorite resource
Average grade it is relatively low, just with metallic ore companion（Altogether）For raw fluorite ore, the grade of ore typically only has 7%~20%, and composition is multiple
It is miscellaneous, to sort difficulty big.With the fast development of national economy, the demand of fluorite ore increasingly increases, to the quality of fluorite concentrate
It is it is required that also growing day by day.
The quality of fluorite concentrate is generally divided into the three-levels such as metallurgical grade, ceramic grade and relieving haperacidity level, and the content of wherein silicon is one
The fluorite concentrate of individual leading indicator, particularly relieving haperacidity level, it is desirable to SiO2Content is in 1 below %, and therefore, concentrate drop silicon is fluorite
Major issue in floatation process.Silicon drops in fluorite concentrate, and ore grinding is crucial, it is necessary to makes fluorite and quartzy monomer dissociation by ore grinding
By flotation fluorite could be made to be separated with quartz, but caused metal ion such as iron ion etc. can activate quartz in grinding process
Flotation, make originally hydrophilic quartz become that floatability is fine, the quartz of this partial activation is difficult in follow-up floatation process
Thoroughly suppressed again, so that fluorite concentrate SiO2Content overproof.
The content of the invention
It is contemplated that overcome prior art defect, it is proposed that a kind of fluorite ore suppresses the flotation side of silicate gangue mineral
Method.The method for floating can effectively improve the grade of fluorite concentrate, reduce SiO in concentrate2Content.
To achieve the above object, the step of the technical solution adopted by the present invention is：
a：Raw ore sample using rod mill carry out ore grinding, in grinding process into grinding machine add oxalic acid, citric acid, tartaric acid,
EDTA complexing agents.
b：Added successively into the ore pulp after ore grinding sodium carbonate be pH adjuster, waterglass be inhibitor, enuatrol and
Oxidized paraffin wax soap is combined as collecting agent, and stirs and size mixing, and medicament is fully acted on mineral grain, with expand each mineral grain it
Between floatability difference.
c：Fluorite particle due to floatability is good and with bubble floating to ore pulp surface formed froth bed, scraped by scraper plate,
Fluorite concentrate product is formed after filtering, drying.Other gangue minerals that can not be floated then are stayed in ore pulp, eventually become mine tailing production
Product.
The beneficial effects of the present invention are：
The method for floating of the present invention compared with technology compare, drop silicon is better, and the grade of final fluorite concentrate is higher, SiO2
Content it is lower.
Brief description of the drawings
Fig. 1 is the mineral processing circuit figure in the specific embodiment of the invention.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but this
The content of invention is not limited solely to detailed description below.
The flotation step of specific embodiment is：
a：Raw ore sample using rod mill carry out ore grinding, in grinding process into grinding machine add oxalic acid, citric acid, tartaric acid,
EDTA complexing agents.
b：Added successively into the ore pulp after ore grinding sodium carbonate be pH adjuster, waterglass be inhibitor, enuatrol and
Oxidized paraffin wax soap is combined as collecting agent, and stirs and size mixing, and medicament is fully acted on mineral grain, with expand each mineral grain it
Between floatability difference.
c：Fluorite particle due to floatability is good and with bubble floating to ore pulp surface formed froth bed, scraped by scraper plate,
Fluorite concentrate product is formed after filtering, drying.Other gangue minerals that can not be floated then are stayed in ore pulp, eventually become mine tailing production
Product.
The example of fluorite flotation of the present invention is as follows：
Embodiment 1
The fluorite raw ore of the present embodiment picks up from Henan fluorite ore, and the ore deposit belongs to siliceous lithotype fluorite ore, and primary slime is more, embedding
Cloth granularity is uneven.Raw ore analysis shows, the content of fluorite is 42.84% in ore, and quartzy content is 38.97%.This implementation
The mineral processing circuit of example is referring to the drawings shown in 1, obtains -2mm raw ores by broken and carries out ore grinding again, is added in grinding process
Complexing agent oxalic acid, dosage 500g/t（Dosage is relative to raw ore dry mine, similarly hereinafter）, one section of corase grind fineness is that -0.074mm contents are
43%（Mass content, similarly hereinafter）.Stirring adds sodium carbonate as pH adjuster, dosage 1500g/t after 2 minutes.Stir 2min
Waterglass is added afterwards as inhibitor, dosage 500g/t.Enuatrol and oxidized paraffin wax soap combination conduct are added after stirring 2min
Collecting agent, dosage are respectively 250g/t and 250g/t, and stirring carries out flotation after 2 minutes, obtains rough concentrate；
The rough concentrate progress obtained to upper step is selected, and waterglass is added in selected 1 as inhibitor, dosage 100g/t.Selected 2
Middle addition waterglass is as inhibitor, dosage 50g/t.Selected 2 obtained concentrate products carry out secondary grinding, in secondary grinding
During add complexing agent oxalic acid, dosage 100g/t, the fineness of secondary grinding accounts for 75.00%, selected 3 for -0.074mm contents
Middle addition waterglass is as inhibitor, dosage 50g/t.Chats 3, chats 4, chats 5, chats 6 are back to selected 1 respectively,
Selected 2, selected 3, selected 4, final concentrate is made in rougher concentration after six times selected；
Rougher tailings made from roughing is scanned, as shown in Figure 1, scans middle addition waterglass as inhibitor, dosage
For 100g/t, add enuatrol and oxidized paraffin wax soap combination is used as collecting agent, dosage is respectively 50g/t and 50g/t.By selected 1
With selected 2 made from chats 1 and chats 2 with and scan concentration desliming, the production after concentration desliming carried out after obtained chats 7 merges
Product sweep selected, and obtained concentrate of sweeping is back to roughing, scan mine tailing, sludge and sweep and are made final total after cleaner tailings merges
Mine tailing.
Embodiment 2
Embodiment 2 and embodiment 1 are basically identical, and difference is, the complexing agent added during primary grinding is citric acid,
Dosage is 500g/t；The complexing agent added during secondary grinding is citric acid, dosage 100g/t.
Embodiment 3
Embodiment 3 and embodiment 1 are basically identical, and difference is, the complexing agent added during primary grinding is tartaric acid,
Dosage is 500g/t；The complexing agent added during secondary grinding is tartaric acid, dosage 100g/t.
Embodiment 4
Embodiment 4 and embodiment 1 are basically identical, and difference is, the complexing agent added during primary grinding is EDTA, use
Measure as 500g/t；The complexing agent added during secondary grinding is EDTA, dosage 100g/t.
Embodiment 5
Embodiment 5 and embodiment 1 are basically identical, and difference is, are not added during primary grinding and secondary grinding any
Complexing agent.
Embodiment 1-5 result of the test is listed in table 1.
Table 1
As known from Table 1, when adding complexing agent during primary grinding and secondary grinding（Apply example 1 ~ 4）, the CaF in concentrate2
Content is relatively not added with improving more than 1.3%, SiO during complexing agent2Decline more than 0.6%.So as to effectively illustrate flotation of the present invention
The superiority of method.
Claims (7)
1. a kind of fluorite ore suppresses the method for floating of silicate gangue mineral, including the grinding process of fluorite ore and flotation
Journey,
It is characterized in that：Oxalic acid, citric acid, tartaric acid, EDTA complexing agents are added in grinding process, ore pulp is located in advance
Reason, the addition of complexing agent are generally 200-1000g/t（Dosage is relative to raw ore dry mine, similarly hereinafter）.
2. a kind of fluorite ore according to claim 1 suppresses the method for floating of silicate gangue mineral, it is characterised in that：Should
Technique comprises the following steps：
a：Raw ore sample using rod mill carry out ore grinding, in grinding process into grinding machine add oxalic acid, citric acid, tartaric acid,
EDTA complexing agents；
b：Added successively into the ore pulp after ore grinding sodium carbonate be pH adjuster, waterglass be inhibitor, combined capturing and collecting agent, and
Stirring is sized mixing, and medicament is fully acted on mineral grain, to expand the floatability difference between each mineral grain；
c：Fluorite particle due to floatability is good and with bubble floating to ore pulp surface formed froth bed, scraped by scraper plate, filtering,
Fluorite concentrate product is formed after drying；Other gangue minerals that can not be floated then are stayed in ore pulp, eventually become product from failing.
A kind of 3. low-grade fluorite ore deposit method for floating according to claim 1, it is characterised in that：Using oxalic acid, citric acid,
Tartaric acid, EDTA complexing agents pre-process to ore pulp.
4. a kind of fluorite ore according to claim 2 suppresses the method for floating of silicate gangue mineral, it is characterised in that：Step
Rapid a complexing agents add grinding machine in grinding process.
5. a kind of fluorite ore according to claim 2 suppresses the method for floating of silicate gangue mineral, it is characterised in that：Step
Grinding attachment uses rod mill in rapid a, makes grinding particle size evenly, prevents that ore is overground.
6. a kind of fluorite ore according to claim 2 suppresses the method for floating of silicate gangue mineral, it is characterised in that：Step
Combined capturing and collecting agent in rapid b combines for enuatrol and oxidized paraffin wax soap.
7. a kind of fluorite ore according to claim 2 suppresses the method for floating of silicate gangue mineral, it is characterised in that：Step
Combined capturing and collecting agent in rapid b uses the ratio of enuatrol and oxidized paraffin wax soap as 1:1.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108672091A (en) * | 2018-04-28 | 2018-10-19 | 武汉科技大学 | A kind of method of dolomite type fluorite flotation fluorite |
| CN108993776A (en) * | 2018-06-22 | 2018-12-14 | 昆明理工大学 | A kind of Scheelite Flotation composite restrainer and its application method |
| CN110449258A (en) * | 2019-07-31 | 2019-11-15 | 中国恩菲工程技术有限公司 | The beneficiation method of bastnaesite |
| CN111589573A (en) * | 2020-05-26 | 2020-08-28 | 中国恩菲工程技术有限公司 | Rare earth ore dressing method |
| CN113351375A (en) * | 2021-07-07 | 2021-09-07 | 咸阳双佰科技有限责任公司 | Fluorite ore flotation composite collecting agent and preparation method and application thereof |
| CN114602644A (en) * | 2022-03-14 | 2022-06-10 | 中国地质科学院郑州矿产综合利用研究所 | Regrinding and sorting method for high-grade middling of fluorite ore |
| CN115367975A (en) * | 2022-08-30 | 2022-11-22 | 广东邦普循环科技有限公司 | Method for recycling sludge containing calcium fluoride |
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| CN108672091A (en) * | 2018-04-28 | 2018-10-19 | 武汉科技大学 | A kind of method of dolomite type fluorite flotation fluorite |
| CN108993776A (en) * | 2018-06-22 | 2018-12-14 | 昆明理工大学 | A kind of Scheelite Flotation composite restrainer and its application method |
| CN110449258A (en) * | 2019-07-31 | 2019-11-15 | 中国恩菲工程技术有限公司 | The beneficiation method of bastnaesite |
| CN111589573A (en) * | 2020-05-26 | 2020-08-28 | 中国恩菲工程技术有限公司 | Rare earth ore dressing method |
| CN113351375A (en) * | 2021-07-07 | 2021-09-07 | 咸阳双佰科技有限责任公司 | Fluorite ore flotation composite collecting agent and preparation method and application thereof |
| CN114602644A (en) * | 2022-03-14 | 2022-06-10 | 中国地质科学院郑州矿产综合利用研究所 | Regrinding and sorting method for high-grade middling of fluorite ore |
| CN114602644B (en) * | 2022-03-14 | 2023-08-18 | 中国地质科学院郑州矿产综合利用研究所 | Regrinding and sorting method for fluorite ore high-grade middlings |
| CN115367975A (en) * | 2022-08-30 | 2022-11-22 | 广东邦普循环科技有限公司 | Method for recycling sludge containing calcium fluoride |
| CN115367975B (en) * | 2022-08-30 | 2023-10-20 | 广东邦普循环科技有限公司 | Method for recycling calcium fluoride-containing sludge |
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