CN112474026A - Magnesite acid triggering-spiral chute preselecting method - Google Patents
Magnesite acid triggering-spiral chute preselecting method Download PDFInfo
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- CN112474026A CN112474026A CN202011281750.2A CN202011281750A CN112474026A CN 112474026 A CN112474026 A CN 112474026A CN 202011281750 A CN202011281750 A CN 202011281750A CN 112474026 A CN112474026 A CN 112474026A
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- magnesite
- acid
- spiral chute
- surfactant
- raw ore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/626—Helical separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/623—Upward current classifiers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention discloses a magnesite acid triggering-spiral chute pre-selection method, which comprises the steps of crushing and desliming raw ore containing magnesite, reacting the raw ore with an acid solution containing a surfactant, and utilizing the reaction of magnesite and acid to generate CO2The apparent specific gravity of the magnesite and silicate minerals is reduced, and the specific gravity difference between the magnesite and the silicate minerals is increased, so that the magnesite and the silicate minerals can be separated by using a conventional spiral chute preselecting device. The invention can effectively solve the problem of difficult separation of magnesite and silicate minerals caused by small density difference and similar surface properties, thereby achieving the purpose of improving the selectionThe purpose of ore preselection efficiency.
Description
Technical Field
The invention belongs to the technical field of mineral processing engineering, and particularly relates to an acid triggering-spiral chute preselection method capable of separating magnesite and silicate minerals.
Background
Magnesite is a magnesium carbonate mineral and is the main source of magnesium. The magnesite in China is abundant in resources, and has higher crystallinity and thicker embedded granularity in partial ore deposits. Magnesite and non-carbonate minerals, especially quartz or silicate minerals, have small density difference and similar surface properties, so that high-efficiency separation of the magnesite and the non-carbonate minerals is always the key point and the difficulty of research in the field of mineral separation.
Currently, flotation is the most common method for separating magnesite from non-carbonate minerals, but has the problem of low separation efficiency. The limitation of flotation is more obvious for some ores with embedded particle size larger than the upper limit of the flotation particle size. Therefore, in the case where the difference in the surface properties of the minerals cannot be effectively utilized, it is considered that the difference in the chemical properties of the minerals themselves is utilized for the purpose of separation.
Magnesite reacts with acid to produce CO2In the course of the reaction, CO2The bubbles are continuously generated and desorbed on the surface of the magnesite, and the undegassed bubbles and mineral particles form a gas-solid combined body, so that the apparent specific gravity of the particles is reduced, and the apparent specific gravity of the non-carbonate minerals is almost unchanged. This difference provides an advantage for the density separation of magnesite and non-carbonate minerals in a spiral chute separator.
Disclosure of Invention
In order to solve the problem of difficult separation of magnesite and non-carbonate minerals due to small density difference and close surface property, the invention provides an acid triggering-spiral chute preselection method for magnesite.
In order to achieve the purpose, the invention adopts the following technical scheme:
a magnesite acid trigger-spiral chute preselecting method includes such steps as crushing raw ore containing magnesite, desliming, reaction with acidic solution containing surfactant to generate CO2The apparent specific gravity of the raw ore is reduced, and the specific gravity difference between magnesite and silicate minerals in the raw ore is increased, so that the conventional spiral chute is utilizedThe trough preselection device realizes the effective separation of magnesite and silicate minerals. The method specifically comprises the following steps:
1) crushing raw ore containing magnesite to minus 2 to minus 1mm, and then removing fine mud with the particle size of less than 0.1mm through a cyclone;
2) synchronously, uniformly and continuously adding the ore pulp treated by the cyclone in the step 1) and an acid solution containing a surfactant into a feed chute of a spiral chute separator according to the volume ratio of 1: 1-1.5, mixing and then separating;
3) after separation, solid-liquid separation is carried out by using a rubber fine sieve, and magnesite rough concentrate and tailings can be obtained.
The surfactant is sodium dodecyl sulfate, and the dosage of the surfactant is 100-300 g/t of raw ore. The acid solution is an aqueous solution of sulfuric acid, hydrochloric acid or nitric acid, and the acid concentration of the acid solution is 1-5 wt%.
The spiral chute sorting machine is an existing acid-resistant spiral chute sorting machine or an improved product thereof.
The invention utilizes the reaction of magnesite and acid to generate CO2The characteristic of the bubbles makes magnesite react with acid solution to generate CO on the surface of the mineral2Bubbles are formed and gas-solid combination is formed, so that the apparent specific gravity of the magnesite is reduced, but the apparent specific gravity of non-carbonate minerals (such as silicate minerals) is hardly changed in the process, and the increase of the difference of the apparent specific gravities of the two types of minerals can be realized; the addition of the surfactant can reduce bubbles and the bubble desorption rate, so that the gas-solid combination is more stable; under the action of the ascending water flow of the spiral chute, when ore particles move downwards in the spiral chute, magnesite moves towards the outer edge of the spiral chute due to the reduction of specific gravity, and non-carbonate minerals move along the inner edge, so that the magnesite particles and the non-carbonate mineral particles with the reduced apparent specific gravity realize the purpose of preselection based on the specific gravity difference.
The invention has the following remarkable advantages:
1) the invention solves the problems of poor selectivity and low efficiency of flotation reagents in the traditional flotation separation process of magnesite and gangue.
2) The method provided by the invention has the advantages that the requirements of the raw ore materials for pre-selection of coarse-particle ores are 0.1-2 mm, namely, only crushing and screening are needed, and grinding is not needed, so that the power consumption required by raw material treatment is reduced.
3) The combination of reselection and the preselection method of the invention can greatly reduce the use of medicaments and reduce the cost of the medicaments.
Detailed Description
In order to make the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
Example 1
Raw ore containing 38% of MgO and 8.6% of silicate mineral from inner Mongolia is pre-selected by the following steps:
crushing raw ore containing magnesite to-2 mm, removing fine mud with the particle size less than 0.1mm by using a cyclone, simultaneously feeding ore pulp at the underflow of the cyclone into a feeding groove of a spiral chute sorting machine (the dosage of sodium dodecyl sulfate is controlled to be 100g/t raw ore) at the same time according to the feeding speed of 5L/min and the sulfuric acid solution containing sodium dodecyl sulfate with the acid concentration of 5wt% (the feeding speed is 5.5L/min), separating the magnesite from silicate minerals, and performing solid-liquid separation on the obtained magnesite rough concentrate and tailings by using a rubber fine sieve. The grade of the obtained magnesite rough concentrate reaches 45 percent, and the recovery rate is close to 92 percent.
Example 2
Raw ore containing 39 percent of MgO and 9.5 percent of silicate mineral from Heilongjiang is pre-selected by the following steps:
crushing raw ore containing magnesite to-1.5 mm, removing fine mud with the particle size less than 0.1mm by using a cyclone, simultaneously feeding ore pulp at the underflow of the cyclone into a feeding groove of a spiral chute separator (the dosage of sodium dodecyl sulfate is controlled to be 200g/t raw ore) according to the feeding speed of 5L/min and the hydrochloric acid solution containing sodium dodecyl sulfate with the acid concentration of 4wt% (the feeding speed is 5.5L/min), separating magnesite from silicate minerals, and performing solid-liquid separation on the obtained magnesite rough concentrate and tailings by using a rubber fine sieve. The grade of the obtained magnesite rough concentrate reaches 44%, and the recovery rate is close to 93%.
Example 3
The method comprises the following steps of pre-selecting raw ore containing 40% of MgO and 8% of silicate minerals from Jilin:
crushing raw ore containing magnesite to-1 mm, removing fine mud with the particle size less than 0.1mm by using a cyclone, simultaneously feeding ore pulp at the underflow of the cyclone into a feeding groove of a spiral chute sorting machine (the dosage of sodium dodecyl sulfate is controlled to be 400g/t raw ore) at the same time according to the feeding speed of 5L/min and the hydrochloric acid solution containing sodium dodecyl sulfate with the acid concentration of 3wt% (the feeding speed is 5.5L/min), separating magnesite and silicate minerals, and performing solid-liquid separation on the obtained magnesite rough concentrate and tailings by using a rubber fine sieve. The grade of the obtained magnesite rough concentrate reaches 44.5 percent, and the recovery rate is close to 92 percent.
Example 4
Raw ore containing 39% of MgO and 10% of silicate minerals from Liaoning is pre-selected by the following steps:
crushing raw ore containing magnesite to-1.5 mm, removing fine mud with the particle size less than 0.1mm by using a cyclone, simultaneously feeding ore pulp at the underflow of the cyclone into a feeding groove of a spiral chute separator (the dosage of sodium dodecyl sulfate is controlled to be 600g/t raw ore) according to the feeding speed of 5L/min and the hydrochloric acid solution containing sodium dodecyl sulfate with the acid concentration of 1wt% (the feeding speed is 5.5L/min), separating magnesite from silicate minerals, and performing solid-liquid separation on the obtained magnesite rough concentrate and tailings by using a rubber fine sieve. The grade of the obtained magnesite rough concentrate reaches 45 percent, and the recovery rate is close to 90 percent.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A magnesite acid triggering-spiral chute preselecting method is characterized in that: crushing raw ore containing magnesite, desliming, reacting with acid solution containing surfactant to generate CO2Is characterized in that it is a combination of (A) and (B),the apparent specific gravity of the magnesite-silicate mineral separation device is reduced, and further the specific gravity difference between the magnesite and the silicate mineral in raw ore is increased, so that the effective separation of the magnesite and the silicate mineral is realized by utilizing a conventional spiral chute pre-selection device.
2. The acid triggered-spiral chute preselection method of claim 1, wherein: the method comprises the following steps:
1) crushing raw ore containing magnesite to minus 2 to minus 1mm, and desliming through a cyclone;
2) synchronously, uniformly and continuously adding the ore pulp treated by the cyclone in the step 1) and an acid solution containing a surfactant into a feed chute of a spiral chute separator, mixing and then separating;
3) and carrying out solid-liquid separation after separation to obtain magnesite rough concentrate and tailings.
3. The acid triggered-spiral chute preselection method of claim 2, wherein: the volume ratio of the ore pulp used in the step 2) to the acid solution containing the surfactant is 1: 1-1.5.
4. The acid triggered-spiral chute preselection method of claim 2 or 3, characterized in that: the surfactant is sodium dodecyl sulfate, and the dosage of the surfactant is 100-300 g/t of raw ore.
5. The acid triggered-spiral chute preselection method of claim 2 or 3, characterized in that: the acid solution is an aqueous solution of sulfuric acid, hydrochloric acid or nitric acid, and the concentration of the acid solution is 1-5 wt%.
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| CN202011281750.2A CN112474026A (en) | 2020-11-16 | 2020-11-16 | Magnesite acid triggering-spiral chute preselecting method |
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| CN202011281750.2A CN112474026A (en) | 2020-11-16 | 2020-11-16 | Magnesite acid triggering-spiral chute preselecting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2165278A1 (en) * | 1971-12-29 | 1973-07-12 | Goldschmidt Ag Th | Residue separation from wet zinc or copper extraction - by flocculation and archimides screw washing |
| CN1094996A (en) * | 1993-05-12 | 1994-11-16 | 冶金部鞍山黑色冶金矿山设计研究院 | The dressing method of giobertite |
| CN102284372A (en) * | 2011-07-26 | 2011-12-21 | 昆明理工大学 | Flotation method for carbonate minerals |
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| CN104437819A (en) * | 2014-11-04 | 2015-03-25 | 中蓝连海设计研究院 | Turbid liquid and method for improving efficiency of reverse flotation of carbonate from phosphorus |
| CN108097470A (en) * | 2017-12-27 | 2018-06-01 | 福州大学 | A kind of separation method of calcite and magnesite |
-
2020
- 2020-11-16 CN CN202011281750.2A patent/CN112474026A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2165278A1 (en) * | 1971-12-29 | 1973-07-12 | Goldschmidt Ag Th | Residue separation from wet zinc or copper extraction - by flocculation and archimides screw washing |
| CN1094996A (en) * | 1993-05-12 | 1994-11-16 | 冶金部鞍山黑色冶金矿山设计研究院 | The dressing method of giobertite |
| CN102284372A (en) * | 2011-07-26 | 2011-12-21 | 昆明理工大学 | Flotation method for carbonate minerals |
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| CN104437819A (en) * | 2014-11-04 | 2015-03-25 | 中蓝连海设计研究院 | Turbid liquid and method for improving efficiency of reverse flotation of carbonate from phosphorus |
| CN108097470A (en) * | 2017-12-27 | 2018-06-01 | 福州大学 | A kind of separation method of calcite and magnesite |
Non-Patent Citations (1)
| Title |
|---|
| 关明久: "国内外菱镁矿选矿的进展概况", 《轻金属》 * |
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