CN104399593B - Magnesite ore desilicication and decalcification method - Google Patents
Magnesite ore desilicication and decalcification method Download PDFInfo
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Abstract
The invention discloses a magnesite ore desilicication and decalcification method, which is used for dressing low-grade magnesite ore and improving the sorting effect. A magnesite ore one-time rough and two-time fine reverse flotation desilicication and acid leaching decalcification process is adopted; conventional amine chemicals are used as cation collectors, wherein the dosage for one-time reverse flotation is 75-100g/t, the dosage for the first time of fine reverse flotation is 50-70g/t and the dosage for the second time of fine reverse flotation is 25-30g/t, sodium hexametaphosphate and water glass are used as regulators, wherein the dosage of the hexametaphosphate is 150-200g/t and the dosage of the water glass is 1000-1500g/t; diluted hydrochloric acid is used for regulating pH to 5.0-5.5 and then flotation is conducted; after flotation, the concentration of ore pulp is regulated to 20-30 percent, concentrated hydrochloric acid is used for regulating pH, stirring is conducted at revolving speed of 600-700rpm and the ore pulp is leached by using acid for 40-60min. According to the feature of high content of silicon and calcium impurities in magnesite ore, after the content of silicon is reduced, the removal rate of high-calcium impurities can be remarkably improved.
Description
Technical field
The present invention relates to beneficiation method, particularly a kind of magnesite ore desiliconization, the method for decalcification.
Background technology：
Magnesite substantial amounts of exploitation year by year is so that high-grade high-quality resource gradually decreases.It is currently low-grade mostly
High-silicon high calcium magnesite is it is impossible to be directly used in production refractory material.Therefore, it is necessary to through ore dressing and desiliconizing decalcification, improve the product of magnesium
Position is reaching production requirement.Major impurity in magnesite ore is silicate and carbonate (dolomite, calcite etc.).Typically
Remove silicates gangue mineral with reverse flotation, and preferable desiliconization index can be obtained；Direct flotation magnesite, to remove carbonate veins
Stone, but decalcification effect is poor.Because most magnesite contain silicate and carbonate gangue mineral simultaneously, normally alternately floated using counter
Choosing and direct flotation.After this first reverse flotation, direct flotation flow process existing problems are as follows：Decalcification effect is poor；Magnesite is first pressed down and floats afterwards, shadow
Ring its separating effect；Direct flotation floats magnesium ore deposit and belongs to the few flow process of floating many suppressions, and collecting agent consumption is big, and beneficiation cost is high；Conventional in direct flotation
Fatty acid collecting agent need to heat, index could have been obtained；Direct flotation need to add waterglass, affects settling ore pulp；Medicament kind
Class is many, and ore dressing Water circulation is difficult；Medicament poor selectivity, in magnesium ore deposit, the mineral of shepardite Bulk flotation choosing difference cannot reclaim, and magnesium ore deposit provides
Source loss is serious.
Therefore, good, the easy to operate Novel impurity-cleaning technique of a kind of low cost of exploitation, effect, to raising magnesite ore dressing water
Flat, improve magnesite resource utilization ratio significant.
Content of the invention
The invention provides a kind of method of magnesite ore decalcification, for low-grade magnesite ore dressing, improve sorting effect
Really.
The invention provides a kind of magnesite ore desiliconization, the method for decalcification, its solution is as follows：
Using magnesite one is thick, two smart reverse flotations remove acidleach deliming technique after silicon, caught with conventional amine medicament for cation
Receive agent, a thick consumption is 75～100g/t, a smart consumption is 50～70g/t, two smart consumption 25～30g/t, total consumption is 150～
200g/t, with calgon and waterglass as regulator, calgon consumption is 150～200g/t, and waterglass consumption is
1000～1500g/t, with watery hydrochloric acid adjustment flotation pH for 5.0～5.5, carries out thick two smart single reverse flotations with this understanding and takes off
Silicon, decalcification operation；After flotation, adjustment pulp density, to 20%～30%, controls pH with concentrated hydrochloric acid, stably between 1～2,
Under the conditions of flotation device revolution is 600～700r/min, concentrated hydrochloric acid acid leaching ore pulp 40～60min.
Compared with existing similar technique, it significantly has the beneficial effect that the present invention：Contained silicium calcareous miscellaneous according to magnesite
The high feature of quality, after the content reducing silicon, can significantly improve the clearance of calcium impurities.And there is simple to operate, equipment
The low advantage of operating cost.After flotation, plus one section of corrosion-resistant groove operation of macerating, just the removal efficiency of calcium can be brought up to 50%～
60%.Compared with conventional single reverse flotation, the removal efficiency of calcium improves 20%～30%.With trans- just combine flotation flowsheet compared with,
Decrease equipment cost and reagent cost, simplify flow operations, decrease labo r usage.
Specific embodiment
Below by magnesite ore dressing experiment, in conjunction with the sorting index of contrast different minerals, with embodiment, the present invention is made
Further description.
Embodiment 1
Obtain raw magnesite from Haicheng area, know through chemical examination：CaO grade for 0.97%, MgO grade is
46.04%.Sample ore reaches 74% through ball mill ore grinding, grinding particle size -0.074mm content.Hang in groove type floatation cell in XFD type and use
One thick two smart reverse flotation flowsheet carries out flotation, each flotation sample ore 400g, and amount of water is 600mL, and collecting agent LKD consumption is：One
Thick consumption 75g/t, a smart consumption 50g/t, two smart consumption 25g/t, amount to 150g/t.With calgon and waterglass for adjustment
Agent, calgon consumption is 150g/t, and waterglass consumption is 1500g/t.Control flotation pH to be 5.0～5.5, adjust after sorting
Pulp density is 20%～30%, controls pH between 1～2 with concentrated hydrochloric acid, dries detection to sample ore after acidleach 40min.Can obtain
It is 70.53%, CaO grade 0.53% to yield, MgO grade is 46.95% magnesite concentrate.The removal efficiency of calcium is
45.36%.The removal efficiency of calcium improves 23% compared with conventional single reverse flotation.
Embodiment 2
Sample ore reaches 74% with embodiment 1 sample ore, sample ore through ball mill ore grinding, grinding particle size -0.074mm content.Flotation
Sample ore 400g is added, add water 600mL, and with lauryl amine as collecting agent, consumption is in groove：One thick consumption 75g/t, a smart consumption 50g/t,
Two smart consumption 25g/t, amount to consumption 150g/t, add water glass 1500g/t, and calgon 150g/t adjusts flotation with hydrochloric acid
PH=5.5, after one thick two smart three sections of reverse flotations, can obtain yield is 71.44%, CaO grade 0.77%, and MgO grade is
46.64% magnesite concentrate, the removal efficiency of calcium is 20.62%.Then carry out acidleach further, adjust pulp density and exist
30%, control slurry pH stable in 1～2, revolution 700r/min, acidleach 40min with concentrated hydrochloric acid, inspection is dried to product in groove
Survey, finally can obtain yield is 70.15%, CaO grade 0.58%, and MgO grade is 46.85% magnesite concentrate.With above-mentioned list
One reverse flotation is compared, and the removal efficiency of CaO improves 19.58%.On this basis, increase leaching time, sample ore is through thick two essences
After reverse flotation, adjust pulp density 30% about, control slurry pH stable in 1～2, revolution 700r/min, acid with concentrated hydrochloric acid
Leaching 60min.The yield of final concentrate is 69.40%, CaO grade 0.53%, and MgO grade is 46.85%.The now removal efficiency of calcium
To be up to 45.36%, the removal efficiency of calcium improves 24.74% compared with lauryl amine for the single reverse flotation of collecting agent.
Claims (1)
1. a kind of magnesite ore desiliconization, the method for decalcification, is characterized in that the method comprises the following steps：
Acidleach deliming technique after silicon is removed using magnesite one roughing, the single reverse flotation of recleaning, with lauryl amine as cation
In collecting agent, wherein one roughing collector dosage be 75～100 g ton, in primary cleaning collector dosage be 50～70 grams/
Ton, in recleaning, collector dosage is 25～30 g ton, and the total consumption of collecting agent is 150～200 g ton, with calgon
It is regulator with waterglass, calgon consumption is 150～200 g ton, waterglass consumption is 1000～1500 g ton, with
Watery hydrochloric acid adjustment flotation pH value is 5.0～5.5, carries out one roughing, recleaning single Counterfloatating desiliconization decalcification operation, will be anti-
The concentrate pulp concentration obtaining after flotation adjusts to 20%～30%, uses concentrated hydrochloric acid control ph, make pH stable 1～2 it
Between, under the conditions of flotation device agitation revolution is 600～700 revs/min, using concentrated hydrochloric acid acid leaching ore pulp 40～60 minutes.
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| CN104399593B true CN104399593B (en) | 2017-02-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923383A (en) * | 2014-03-18 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Dressing and grinding technology for low-grade magnesite |
| CN106345616A (en) * | 2016-11-28 | 2017-01-25 | 肃北镁科技耐火材料有限责任公司 | Flotation calcium-removing agent and method for magnesite |
| CN109847946B (en) * | 2018-12-28 | 2019-12-24 | 东北大学 | Application of medicament in flotation decalcification of magnesite |
| CN110639687B (en) * | 2019-10-21 | 2021-08-03 | 辽宁科技大学 | Thermal separation process of low-grade hydromagnesite ore |
| CN113731644B (en) * | 2021-09-01 | 2022-12-20 | 辽宁科技大学 | Impurity removal method of magnesite ore washing, friction screening and asynchronous reverse flotation |
Citations (4)
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|---|---|---|---|---|
| CN101773868A (en) * | 2009-01-08 | 2010-07-14 | 鞍钢集团矿业公司 | Novel process for purifying magnesite |
| CN103212486A (en) * | 2013-05-06 | 2013-07-24 | 辽宁省地质矿产研究院 | Method for low-grade magnesite flotation |
| CN103272702A (en) * | 2013-06-08 | 2013-09-04 | 北京矿冶研究总院 | Flotation collector and method for obtaining high-grade magnesite concentrate from low-grade magnesite |
| CN103537380A (en) * | 2013-10-28 | 2014-01-29 | 辽宁科技大学 | Reverse flotation, tailings cleaning and recleaning method of magnesite ore |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773868A (en) * | 2009-01-08 | 2010-07-14 | 鞍钢集团矿业公司 | Novel process for purifying magnesite |
| CN103212486A (en) * | 2013-05-06 | 2013-07-24 | 辽宁省地质矿产研究院 | Method for low-grade magnesite flotation |
| CN103272702A (en) * | 2013-06-08 | 2013-09-04 | 北京矿冶研究总院 | Flotation collector and method for obtaining high-grade magnesite concentrate from low-grade magnesite |
| CN103537380A (en) * | 2013-10-28 | 2014-01-29 | 辽宁科技大学 | Reverse flotation, tailings cleaning and recleaning method of magnesite ore |
Non-Patent Citations (1)
| Title |
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| 由低品位菱镁矿制备高纯氢氧化镁的工艺研究;白晶;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20120315(第3期);第18页第4至28行 * |
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