CN103464289A - Method for separating out silicic acid metal salts in low-grade phosphate rock - Google Patents

Method for separating out silicic acid metal salts in low-grade phosphate rock Download PDF

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CN103464289A
CN103464289A CN2013104221085A CN201310422108A CN103464289A CN 103464289 A CN103464289 A CN 103464289A CN 2013104221085 A CN2013104221085 A CN 2013104221085A CN 201310422108 A CN201310422108 A CN 201310422108A CN 103464289 A CN103464289 A CN 103464289A
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ore
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grade phosphate
flotation
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CN103464289B (en
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李骥
曾波
王国栋
罗鸣坤
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Yunnan Chemical Research Institute
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Abstract

The invention discloses a method for separating out the silicic acid metal salts in low-grade phosphate rock, and particularly relates to a process for producing phosphate concentrate by carrying out impurity flotation separation on the silicic acid metal salts (Mg, Al and Fe) in magnetite-associated low-grade phosphate rock, belonging to the field of a chemical mineral processing technology. The method is technically characterized by comprising the steps of (1) further grinding phosphorus tailings which are treated by magnetic separation to be the fineness of -200 meshes, wherein the content of the phosphorus tailings is more than 90%; (2) adopting a one-coarse and two-fine direct flotation technological process; (3) adding regulator, collecting agent and silicic acid metal salt inhibitor in the flotation process of the phosphorus tailings to obtain a high-quality phosphate concentrate product. The method realizes high-efficiency separation of the silicic acid metal salts (Mg, Al and Fe) in the associated low-grade phosphate rock, and reaches the indicators in beneficiation that the content of the phosphate concentrate P2O5 is more than 34%, the content of MgO is less than 1.0%, the content of Al2O3 and Fe2O3 is less than 2%, and the recovery rate of the P2O5 in the low-grade phosphate rock is more than 75%; the produced high-quality phosphate concentrate can be taken as phosphatic fertilizer production raw material, and the method is a more feasible beneficiation process used for the resource utilization of the low-grade phosphate rock.

Description

A kind of method that low-grade phosphate ore mesosilicic acid slaine is deviate from
Technical field
The invention discloses a kind of method that low-grade phosphate ore mesosilicic acid slaine is deviate from, the flotation processing of the fosfosiderite association apatite resource that particularly impurity content is high.Belong to mineral manufacture field category.
Background technology
There is magma metamorphism type apatite association magnetite deposit in China's West Yunnan, and proved reserves are 1,648 ten thousand tons, mean P 2o 5grade 14.67%, in ore, essential mineral is fluor-apatite, collophane, magnetic iron ore, bloodstone, gedrite, hornblend, calcite, biotite etc.Existing technique of preparing employing one slightly sweeps the technological process of three essences, uses the conventional dose such as oxidized paraffin wax soap, waterglass and sodium carbonate to carry out flotation, the phosphorus concentrate P of production 2o 5grade 30%, the rate of recovery 80% left and right, objectionable impurities MgO content 3.38%, Al in phosphorus concentrate product 2o 3content 3.82%, Fe 2o 3content 4.45%, all exceed the minimum rock phosphate in powder standard of national regulation, can't use as qualified phosphorus concentrate product and sell.Therefore up to the present, West Yunnan the type rock phosphate in powder does not obtain rational exploitation and utilization.
The present invention, by the screening of plant technology design and beneficiation reagent, has obtained the qualified phosphorus concentrate product of impurity content, has industrial application value preferably.
Summary of the invention
Purpose of the present invention, for the deficiency of the assorted apatite of current height ore deposit technique of preparing, provides a kind of reagent cost low, the technological process simple and stable, and flotation efficiency is high, the ore dressing impurity-removing method that product quality is up to standard.
The method that low-grade phosphate ore mesosilicic acid slaine of the present invention is deviate from is by being achieved with following technical proposals, and it comprises following technological process:
(1) P of magnetic iron ore association low-grade phosphate ore 2o 5content is generally 9.0～20.0%;
(2) by the phosphorous mine tailing after magnetic separation, under the condition of ore milling concentration 50～70%, further ore grinding to fineness is the above % of-200 order content 90%, and the adjustment pulp density is 25～35%;
(3) add adjusting agent, collecting agent and metal silicate inhibitor at levigate phosphorus ore ore pulp, at normal temperatures, adopt the direct floatation process of thick two essences, through FLOTATION SEPARATION metal silicate impurity, obtain its P 2o 5content is greater than 34%, MgO content lower than 1.0%, Al 2o 3+ Fe 2o 3content is lower than 2% high-quality phosphorus concentrate product, the P of low-grade phosphate ore 2o 5the rate of recovery is greater than 75%.
Metal silicate described in step 1 is deviate from the mixture for magnesium silicate, alumina silicate, ferrosilite.
Mog described in step (2) is 96% for-200 order content.
The direct floatation process of thick two essences described in step (3), its time of roughly selecting is 5～10 minutes, and selected 1 flotation time is 4～8 minutes, and selected 2 flotation time is 3～5 minutes.
Add adjusting agent, collecting agent and metal silicate inhibitor described in step (3), it adds adjusting agent in roughly selecting be sodium carbonate and waterglass, addition is respectively 4～6 kilograms of sodium carbonate/ton raw ore, 1～3 kg of water glass/ton raw ore, collecting agent is rubber seed oil, and addition is 0.5～2 kilogram of rubber seed oil/ton raw ore; The metal silicate inhibitor is water reducer, and addition is 0.3～1 kilogram of water reducer/ton raw ore.
Flotation under normal temperature described in step (3), its flotation temperature is 15～25 ℃.
The present invention can promote the development of high assorted apatite ore deposit technique of preparing, and have following outstanding effect in practical application: the processing cost of ore-dressing technique is low, the technological process simple and stable, and flotation efficiency is high, and product quality is up to standard.
The accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
The aspect that the present invention is above-mentioned and/or additional and advantage will become and obviously and easily understand from the description of 1 couple of embodiment by reference to the accompanying drawings.
A kind of method of high assorted apatite ore deposit ore dressing removal of impurities, the technological process of its feature is: (1), by ore reduction, under ore milling concentration 50 ~ 70% conditions, wet milling to fineness is-200 order content 90 ~ 98%, the gained material adds water and adjusts the ore pulp that concentration is 25 ~ 35%.
(2) by mass transport to floatation system, under the slurry temperature of 10 ~ 35 ℃, according to twice selected flow process of one roughing, carry out flotation, the product stayed in initial separatory cell is true tailings, roughly selects froth pulp and carries out selected for the first time; The product stayed in cleaner cell for the first time is chats I, turns back to initial separatory cell, and selected froth pulp carries out selected for the second time for the first time; The product stayed in cleaner cell for the second time is chats II, turns back to cleaner cell for the first time, and selected froth pulp is final phosphorus concentrate for the second time.
(3) while roughly selecting, floating agent is sodium carbonate, rubber seed oil, waterglass and cement water reducing agent; First and second times floating agent when selected is waterglass and cement water reducing agent.
Mog described in step (1) is-200 order content 90 ~ 98%, can ensure that the apatite liberation degree of minerals of ore milling product is higher than 75%;
Twice cleaning technological flowasheet of one roughing described in step (2), the flotation time of roughly selecting is 5 ~ 10 minutes, and selected one flotation time is 4 ~ 8 minutes, and selected two flotation time is 3 ~ 5 minutes;
Floating agent described in step (2) roughly selecting middle addition is: 4 ~ 6 kg/tonnes of raw ores of sodium carbonate, 1 ~ 3 kg/tonne of raw ore of waterglass, 0.3 ~ 1 kilogram of ton/raw ore of cement water reducing agent, 0.5 ~ 2 kg/tonne of raw ore of rubber seed oil;
Floating agent described in step (2), in selected one, addition is: 0.5 ~ 1 kg/tonne of raw ore of waterglass, 0.1 ~ 0.5 kilogram of ton/raw ore of cement water reducing agent;
Floating agent described in step (2), in selected two, addition is: 0.2 ~ 0.5 kg/tonne of raw ore of waterglass, 0.1 ~ 0.3 kilogram of ton/raw ore of cement water reducing agent.
embodiment 1:
By the crushing raw ore ore grinding, to-200 order content 90%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 17.11 20.67 7.61 8.23 10.59
Adjusting floatation concentration is 35%, by raw ore 5kg/h treating capacity, carries out continuous ore dressing, roughly selecting middle floating agent addition is: 4 kg/tonnes of raw ores of sodium carbonate, 3 kg/tonnes of raw ores of waterglass, 1 kilogram of ton/raw ore of cement water reducing agent, 2 kg/tonnes of raw ores of rubber seed oil; In selected one, the floating agent addition is: 1 kg/tonne of raw ore of waterglass, 0.5 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.5 kg/tonne of raw ore of waterglass, 0.25 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 35.23 1.12 0.97 0.75
The concentrate rate of recovery is 75.42%.
embodiment 2:
By the crushing raw ore ore grinding, to-200 order content 92%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 19.87 16.47 4.89 6.8 10.49
Adjusting floatation concentration is 30%, by raw ore 5kg/h treating capacity, carries out continuous ore dressing, roughly selecting middle floating agent addition is: 5 kg/tonnes of raw ores of sodium carbonate, 2 kg/tonnes of raw ores of waterglass, 1 kilogram of ton/raw ore of cement water reducing agent, 1.5 kg/tonnes of raw ores of rubber seed oil; In selected one, the floating agent addition is: 0.5 kg/tonne of raw ore of waterglass, 0.5 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.3 kg/tonne of raw ore of waterglass, 0.2 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 35.92 0.81 0.50 0.34
The concentrate rate of recovery is 78.77%.
embodiment 3:
By the crushing raw ore ore grinding, to-200 order content 94%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 19.81 21.53 5.05 6.28 7.78
Adjusting floatation concentration is 25%, by raw ore 5kg/h treating capacity, carries out continuous ore dressing, roughly selecting middle floating agent addition is: 6 kg/tonnes of raw ores of sodium carbonate, 1 kg/tonne of raw ore of waterglass, 0.5 kilogram of ton/raw ore of cement water reducing agent, 1 kg/tonne of raw ore of rubber seed oil; In selected one, the floating agent addition is: 0.5 kg/tonne of raw ore of waterglass, 0.25 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.25 kg/tonne of raw ore of waterglass, 0.1 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 36.37 0.59 0.6 0.48
The concentrate rate of recovery is 79.16%.
embodiment 4:
By the crushing raw ore ore grinding, to-200 order content 95%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 10.43 24.95 11.29 13.1 17.04
Adjusting floatation concentration is 25%, by raw ore 5kg/h treating capacity, carries out continuous ore dressing, roughly selecting middle floating agent addition is: 6 kg/tonnes of raw ores of sodium carbonate, 1 kg/tonne of raw ore of waterglass, 0.5 kilogram of ton/raw ore of cement water reducing agent, 1 kg/tonne of raw ore of rubber seed oil; In selected one, the floating agent addition is: 0.5 kg/tonne of raw ore of waterglass, 0.25 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.25 kg/tonne of raw ore of waterglass, 0.1 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 35.13 1.02 0.57 0.83
The concentrate rate of recovery is 75.16%.
embodiment 5:
By the crushing raw ore ore grinding, to-200 order content 95%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 17.04 20.71 7.67 8.27 10.43
Adjusting floatation concentration is 25%, carry out continuous ore dressing by raw ore 5kg/h treating capacity, roughly selecting middle floating agent addition be: 6 kg/tonnes of raw ores of sodium carbonate, 1.6 kg/tonnes of raw ores of waterglass, 0.3 kilogram of ton/raw ore of cement water reducing agent, 0.8 kg/tonne of raw ore of rubber seed oil; In selected one, the floating agent addition is: 0.8 kg/tonne of raw ore of waterglass, 0.25 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.4 kg/tonne of raw ore of waterglass, 0.1 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 35.65 0.77 0.58 0.5
The concentrate rate of recovery is 79.33%.
embodiment 6:
By the crushing raw ore ore grinding, to-200 order content 95%, the chemical composition of mineral is:
Key component P 2O 5 SiO 2 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 15.23 16.42 8.91 8.89 11.01
Adjusting floatation concentration is 25%, carry out continuous ore dressing by raw ore 5kg/h treating capacity, roughly selecting middle floating agent addition be: 6 kg/tonnes of raw ores of sodium carbonate, 1.6 kg/tonnes of raw ores of waterglass, 0.3 kilogram of ton/raw ore of cement water reducing agent, 0.8 kg/tonne of raw ore of rubber seed oil; In selected one, the floating agent addition is: 0.8 kg/tonne of raw ore of waterglass, 0.25 kilogram of ton/raw ore of cement water reducing agent; In selected two, addition is: 0.4 kg/tonne of raw ore of waterglass, 0.1 kilogram of ton/raw ore of cement water reducing agent.Gained concentrate chemical composition is:
Key component P 2O 5 MgO Al 2O 3 Fe 2O 3
Analysis result (%) 37.32 0.93 0.46 0.79
The concentrate rate of recovery is 78.42%.

Claims (6)

1. the method that low-grade phosphate ore mesosilicic acid slaine is deviate from is characterized in that: comprise following technological process:
(1) P of magnetic iron ore association low-grade phosphate ore 2o 5content is generally 9.0～20.0%;
(2) by the phosphorous mine tailing after magnetic separation, under the condition of ore milling concentration 50～70%, further ore grinding to fineness is the above % of-200 order content 90%, and the adjustment pulp density is 25～35%;
(3) add adjusting agent, collecting agent and metal silicate inhibitor at levigate phosphorus ore ore pulp, at normal temperatures, adopt the direct floatation process of thick two essences, through FLOTATION SEPARATION metal silicate impurity, obtain its P 2o 5content is greater than 34%, MgO content lower than 1.0%, Al 2o 3+ Fe 2o 3content is lower than 2% high-quality phosphorus concentrate product, the P of low-grade phosphate ore 2o 5the rate of recovery is greater than 75%.
2. the method that a kind of low-grade phosphate ore mesosilicic acid slaine according to claim 1 is deviate from, it is characterized in that: the metal silicate described in step 1 is deviate from the mixture for magnesium silicate, alumina silicate, ferrosilite.
3. the method that a kind of low-grade phosphate ore mesosilicic acid slaine according to claim 1 is deviate from is characterized in that: the mog described in step (2) is 96% for-200 order content.
4. the method that a kind of low-grade phosphate ore mesosilicic acid slaine according to claim 1 is deviate from, it is characterized in that: the direct floatation process of thick two essences described in step (3), its time of roughly selecting is 5～10 minutes, selected 1 flotation time is 4～8 minutes, and selected 2 flotation time is 3～5 minutes.
5. the method for a kind of high assorted apatite ore deposit ore dressing removal of impurities according to claim 1, it is characterized in that: described in step (3), add adjusting agent, collecting agent and metal silicate inhibitor, it adds adjusting agent in roughly selecting be sodium carbonate and waterglass, addition is respectively 4～6 kilograms of sodium carbonate/ton raw ore, 1～3 kg of water glass/ton raw ore, collecting agent is rubber seed oil, and addition is 0.5～2 kilogram of rubber seed oil/ton raw ore; The metal silicate inhibitor is water reducer, and addition is 0.3～1 kilogram of water reducer/ton raw ore.
6. the method for a kind of high assorted apatite ore deposit ore dressing removal of impurities according to claim 1, it is characterized in that: flotation under the normal temperature described in step (3), its flotation temperature is 15～25 ℃.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104858068A (en) * 2015-06-09 2015-08-26 中蓝连海设计研究院 Method for processing phosphate rock tailing by adopting single direct flotation process
CN109967223A (en) * 2019-03-29 2019-07-05 中冶北方（大连）工程技术有限公司 Apatite mine drop is miscellaneous to select phosphorus technique
CN111940147A (en) * 2019-12-10 2020-11-17 湖北大峪口化工有限责任公司 Application of naphthalene-based superplasticizer as collophanite beneficiation inhibitor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104858068A (en) * 2015-06-09 2015-08-26 中蓝连海设计研究院 Method for processing phosphate rock tailing by adopting single direct flotation process
CN109967223A (en) * 2019-03-29 2019-07-05 中冶北方（大连）工程技术有限公司 Apatite mine drop is miscellaneous to select phosphorus technique
CN111940147A (en) * 2019-12-10 2020-11-17 湖北大峪口化工有限责任公司 Application of naphthalene-based superplasticizer as collophanite beneficiation inhibitor

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