CN109847947A - EGTA and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification - Google Patents
EGTA and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification Download PDFInfo
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- CN109847947A CN109847947A CN201910099166.6A CN201910099166A CN109847947A CN 109847947 A CN109847947 A CN 109847947A CN 201910099166 A CN201910099166 A CN 201910099166A CN 109847947 A CN109847947 A CN 109847947A
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
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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
- B03D1/002—Inorganic 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
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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Abstract
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, belongs to magnesite purification by mineral technology field.This method includes ore grinding, sizes mixing, direct flotation roughing decalcification；It is described to size mixing, it inhibitor EGTA solution is added in magnesite ore pulp, is sized mixing；In the direct flotation roughing decalcification, inhibitor SHMP is added and is adjusted in the magnesite ore pulp that pH value is 10~12, collecting agent is added, foaming agent carries out direct flotation roughing decalcification.Using impure mineral dolomite in magnesite and magnesite under EGTA and SHMP synergistic effect, the calcium mineral in magnesite are removed, improve magnesite quality this method by existing floatability difference.
Description
Technical field
The present invention relates to magnesite purification by mineral technology fields, and in particular to a kind of EGTA and SHMP collaboration inhibition use
In the method for magnesite flotation decalcification.
Background technique
During magnesite purification by mineral, reducing CaO content is the key that improve magnesite quality.In magnesite
CaO mainly wraps as in impure mineral dolomite (CaMg (CO3)2) in.Currently, the inhibitor mainly used for magnesite decalcification
For calgon, calgon is smaller to magnesite Within Monominerals inhibiting effect, larger to dolomite Within Monominerals inhibiting effect,
But since the dissolution of the magnesite in floatation process and dolomite mineral causes a large amount of magnesium, calcium ion to be dissolved into ore pulp, and calcium
Magnesium ion physicochemical properties are close, cause the calcium ion in solution that can be adsorbed onto magnesite surface, promote magnesite and white clouds
Stone surface nature is convergent, so that magnesite be made also by the inhibition of calgon, to cause the magnesite rate of recovery lower, increases floating
Select separating difficulty.Thus, it is found that the chelating agent that a kind of pair of calcium ion selective is strong, it can be with the Ca in crude ore pulp2+Generate chela
Object is closed, reduces magnesite to Ca2+Adsorbance improves the recycling of magnesite in the case where calgon is the flotation system of inhibitor
Rate is imperative.
Summary of the invention
The object of the present invention is to provide a kind of EGTA and SHMP collaborations to inhibit the method for magnesite flotation decalcification, according to
In the dosage of different ratio composite restrainer EGTA (bis- (the 2- amino-ethyl ether) tetraacethyls of ethylene glycol)+SHMP (calgon)
Under, floatability difference existing for impure mineral dolomite in magnesite and magnesite removes the calcium mineral in magnesite, improves
Magnesite quality provides new medicament for high calcium low-grade magnesite ore dressing decalcification.
A kind of EGTA and SHMP collaboration of the invention inhibits the method for being used for magnesite flotation decalcification, including ore grinding, size mixing,
Direct flotation roughing decalcification；
It is described to size mixing, it inhibitor EGTA solution is added in magnesite ore pulp, is sized mixing；
In the direct flotation roughing decalcification, inhibitor SHMP is added to the magnesite ore pulp for adjusting that pH value is 10~12
In, carry out subsequent direct flotation roughing decalcification.
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, by solid-to-liquid ratio, EGTA: magnesite
Mine ore pulp=(40~80) mg:1L, by solid-to-liquid ratio, SHMP: magnesite ore pulp=(30~50) mg:1L；Wherein, magnesite ore pulp
In, the mass concentration of magnesite powder is 20~40%.
It is the mass concentration that 10~12 deionized waters are formulated is 0.5 that the inhibitor EGTA solution, which is using pH value,
The inhibitor solution of~1.5g/L.
The inhibitor SHMP can be configured to the use of inhibitor SHMP solution, the mass concentration of inhibitor SHMP solution
Preferably 1.0~2.5g/L.
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, the ore grinding are as follows:
High calcium low-grade magnesite is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, grade < 74 μm
The 75~85% of the total magnesite powder quality of the quality Zhan of magnesite powder.
In the ore grinding, the high calcium low-grade magnesite, main component and each ingredient are by weight percentage
It is 20~30%, CaO for MgO is 20~30%, SiO2It is 0~0.5%.
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, and described sizes mixing, specifically:
Magnesite powder is placed in floatation equipment, deionized water and inhibitor EGTA solution is added, and be uniformly mixed, is carried out
It sizes mixing, obtains the magnesite ore pulp that mass concentration is 20~40%.
Described to size mixing, the floatation equipment preferably hangs groove type floatation cell, revolving speed is 1600~1900rpm.
Described to size mixing, it is preferably 50mg/L that the dosage of the inhibitor EGTA, which accounts for magnesite ore pulp amount,.
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, and the direct flotation roughing is de-
Calcium, specifically:
1) at room temperature, into magnesite ore pulp, NaOH is added, adjusts pH value to after 10~12, stirs evenly, obtain pH value
For 10~12 magnesite ore pulp；
2) in the magnesite ore pulp for being 10~12 to pH value, inhibitor SHMP is added, after mixing, collecting agent oil is added
Sour sodium, stirs evenly, and then carries out direct flotation roughing decalcification, obtains low calcium magnesite concentrate；Wherein, by solid-to-liquid ratio, collecting agent
Collecting agent enuatrol in aqueous solution sodium oleate: magnesite ore pulp=(100~140) mg:1L.
EGTA of the invention and SHMP collaboration inhibits in the method for magnesite flotation decalcification, and EGTA and SHMP make jointly
For inhibitor, it to be used for magnesite flotation decalcification technique.
In the direct flotation roughing decalcification, the NaOH is preferably the NaOH aqueous solution that mass fraction is 1~5%.
In the direct flotation roughing decalcification, it is preferred that the dosage of the inhibitor calgon accounts for magnesite ore pulp amount
For 40mg/L.
In the direct flotation roughing decalcification, described is stirred evenly, and stirring rate is 1600~1900rpm, when stirring
Between be 2~5min.
In the direct flotation roughing decalcification, the pH value is preferably 11.
In the direct flotation roughing decalcification, the revolving speed of the optional equipment that top-ups is 1600~1900rpm, preferably 1800rpm,
The direct flotation time is preferably 3~5min.
In the direct flotation roughing decalcification, the collecting agent enuatrol be preferably molar concentration be 0.01~
The aqueous solution sodium oleate of 0.05mol/L.
In the direct flotation roughing decalcification, the collecting agent enuatrol dosage accounts for magnesite ore pulp amount and is preferably
120mg/L。
In the direct flotation roughing decalcification, after collecting agent enuatrol is added, foaming agent is added, is stirred evenly, most
Direct flotation roughing decalcification is carried out afterwards, the foaming agent is preferably No. 2 oil, by solid-to-liquid ratio, No. 2 oil: magnesite ore pulp=(4~
6) mg:1L.
In the direct flotation roughing decalcification, the low calcium magnesite concentrate main component and each ingredient by weight hundred
Divide than being MgO 47.5~48.5%, SiO2≤ 0.3%, CaO≤0.6%.
EGTA of the invention and SHMP collaboration inhibits in the method for magnesite flotation decalcification, low calcium magnesite concentrate
The rate of recovery is 70~85% by weight percentage, the MgO rate of recovery in low calcium magnesite concentrate is 65 by weight percentage~
75%.
A kind of EGTA and SHMP collaboration of the invention inhibits the method for being used for magnesite flotation decalcification, compared to existing skill
Art, the beneficial effect is that:
1, the present invention develops the use of new inhibitor EGTA, since new inhibitor EGTA contains calcium ion in solution
Selectivity is strong, can generate containing calcium complex, to reduce absorption of the magnesite to calcium ion in solution, reduce six inclined phosphorus
Inhibition of the sour sodium inhibitor to magnesite, compared to only plus calgon be inhibitor when, add EGTA+ calgon energy
Significantly improve the rate of recovery of magnesite in concentrate.Finally available MgO grade is greater than 47%, the magnesite of the rate of recovery 80~90%
Concentrate.
2, compared with prior art, the handled grade of ore is low for method of the invention, and the content of CaO is high in raw ore；It obtains
The magnesite concentrate obtained can reach metallurgical industry superfine standard (YB321~81), i.e. MgO >=47.00%, SiO2≤ 0.30%,
CaO≤0.8%.
3, inhibitor EGTA (bis- (the 2- amino-ethyl ether) tetraacethyls of ethylene glycol) a kind of calcium selectivity pole new in the present invention
Strong complexing agent is chemically mainly used for measuring the titration medicament of the content of calcium ion in solution in the presence of magnesium ion, due to
EGTA can generate hydrophily complex compound with calcium ion, therefore, prevent magnesite in the process as magnesite flotation decalcification
To the medicament that calcium ion in ore pulp solution adsorbs, so that the flotation recovery rate of magnesite is improved, it is de- for low-grade magnesite ore dressing
Calcium provides a kind of new inhibition medicament.
Detailed description of the invention
Fig. 1 is that EGTA and the SHMP collaboration of the embodiment of the present invention 1 inhibit in the method for magnesite flotation decalcification, work
Skill flow diagram.
Fig. 2 is the XRD diagram of raw material magnesite of the invention.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
In following embodiment, high calcium low-grade magnesite used is Kuandian water hole ditch magnesite, glimmering using X-ray
Light spectrometric instrument analyzes the elemental composition of high calcium low-grade magnesite, and main component is by weight percentage are as follows:
MgO is 33.58%, SiO20.27%, CaO 15.17%, surplus CO2With inevitable impurity；Its XRD diagram is shown in Fig. 2.Institute
It is to analyze pure, collecting agent oil with inhibitor EGTA (bis- (the 2- amino-ethyl ether) tetraacethyls of ethylene glycol) and SHMP (calgon)
Sour sodium is that chemistry is pure, and pH adjuster sodium hydroxide is that analysis is pure.Agents useful for same is configured to accordingly with deionized water in test
The aqueous solution of concentration is spare.
Embodiment 1
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, process flow diagram are shown in Fig. 1,
The following steps are included:
Step 1: ore grinding
High calcium low-grade magnesite raw material is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, grade
It is the 75% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；
Step 2: sizing mixing
(1) NaOH is added in deionized water, obtains the deionized water that pH value is 10, is matched with the deionized water that pH value is 10
System, obtaining mass concentration is 0.5g/L；
It (2) is less than 74 μm and 75% magnesite powder of the total magnesite powder quality of Zhan is placed in extension groove type floatation cell by grade
In, deionized water and inhibitor EGTA solution is added, wherein press solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=40mg:1L,
And be uniformly mixed, it sizes mixing, obtains magnesite ore pulp；Wherein, the mass concentration of magnesite is 20% in magnesite ore pulp；
Step 3: direct flotation roughing decalcification
At room temperature, the NaOH aqueous solution that mass fraction is 3% is added to magnesite ore pulp first, adjusts pH value to after 11,
2min is stirred, until ore pulp is uniform, obtains the magnesite ore pulp that pH value is 11；
In the magnesite ore pulp for being 11 to pH value, it is water-soluble that the inhibitor calgon that mass concentration is 1mg/L is first added
After mixing evenly the collecting agent aqueous solution sodium oleate that aqueous solution sodium oleate molar concentration is 0.05mol/L is added, wherein six in liquid
It is 30mg/L that sodium metaphosphate additional amount, which accounts for magnesite ore pulp amount, and it is 100mg/L, stirring that enuatrol additional amount, which accounts for magnesite ore pulp amount,
Then No. 2 oil of foaming agent are added in 2min, it is 5mg/L that No. 2 oily additional amounts, which account for magnesite ore pulp amount, stirs 2min, finally carries out
3min direct flotation roughing decalcification, obtains low calcium magnesite concentrate.During test, flotation device revolving speed 1800r/min is set.
In the present embodiment, it is 47.23%, SiO that the main component of low calcium magnesite concentrate is MgO by weight percentage2For
0.25%, CaO 0.59%；MgO in low calcium magnesite concentrate accounts for 80.25% of MgO total weight in raw material.
Embodiment 2
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, process flow diagram are shown in Fig. 1,
The following steps are included:
Step 1: ore grinding
High calcium low-grade magnesite raw material is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, grade
It is the 80% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；
Step 2: sizing mixing
(1) NaOH is added in deionized water, obtains the deionized water that pH value is 11, is matched with the deionized water that pH value is 11
System, obtaining mass concentration is 1g/L；
It (2) is less than 74 μm and 80% magnesite powder of the total magnesite powder quality of Zhan is placed in extension groove type floatation cell by grade
In, deionized water and inhibitor EGTA solution is added, wherein press solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=50mg:1L,
And be uniformly mixed, it sizes mixing, obtains magnesite ore pulp；Wherein, the mass concentration of magnesite is 20% in magnesite ore pulp；
Step 3: direct flotation roughing decalcification
At room temperature, the NaOH aqueous solution that mass fraction is 3% is added to magnesite ore pulp first, adjusts pH value to after 10,
2min is stirred, until ore pulp is uniform, obtains the magnesite ore pulp that pH value is 10；
In the magnesite ore pulp for being 11 to pH value, the inhibitor calgon water that mass concentration is 1.5mg/L is first added
The collecting agent aqueous solution sodium oleate that aqueous solution sodium oleate molar concentration is 0.05mol/L is added after mixing evenly in solution, wherein
It is 40mg/L that calgon additional amount, which accounts for magnesite ore pulp amount, and it is 110mg/L that enuatrol additional amount, which accounts for magnesite ore pulp amount, is stirred
2min is mixed, No. 2 oil of foaming agent are then added, it is 6mg/L that No. 2 oily additional amounts, which account for magnesite ore pulp amount, stirs 2min, finally carries out
3min direct flotation roughing decalcification, obtains low calcium magnesite concentrate.During test, flotation device revolving speed 1700r/min is set.
In the present embodiment, it is 48.13%, SiO that the main component of low calcium magnesite concentrate is MgO by weight percentage2For
0.14%, CaO 0.61%；MgO in low calcium magnesite concentrate accounts for 80.25% of MgO total weight in raw material.
Embodiment 3
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, process flow diagram are shown in Fig. 1,
The following steps are included:
Step 1: ore grinding
High calcium low-grade magnesite raw material is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, grade
It is the 85% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；
Step 2: sizing mixing
(1) NaOH is added in deionized water, obtains the deionized water that pH value is 12, is matched with the deionized water that pH value is 12
System, obtaining mass concentration is 1g/L；
It (2) is less than 74 μm and 85% magnesite powder of the total magnesite powder quality of Zhan is placed in extension groove type floatation cell by grade
In, deionized water and inhibitor EGTA solution is added, wherein press solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=60mg:1L,
And be uniformly mixed, it sizes mixing, obtains magnesite ore pulp；Wherein, the mass concentration of magnesite is 25% in magnesite ore pulp；
Step 3: direct flotation roughing decalcification
At room temperature, the NaOH aqueous solution that mass fraction is 4% is added to magnesite ore pulp first, adjusts pH value to after 12,
2min is stirred, until ore pulp is uniform, obtains the magnesite ore pulp that pH value is 12；
In the magnesite ore pulp for being 12 to pH value, it is water-soluble that the inhibitor calgon that mass concentration is 2mg/L is first added
After mixing evenly the collecting agent aqueous solution sodium oleate that aqueous solution sodium oleate molar concentration is 0.06mol/L is added, wherein six in liquid
It is 50mg/L that sodium metaphosphate additional amount, which accounts for magnesite ore pulp amount, and it is 120mg/L, stirring that enuatrol additional amount, which accounts for magnesite ore pulp amount,
Then No. 2 oil of foaming agent are added in 2min, it is 4mg/L that No. 2 oily additional amounts, which account for magnesite ore pulp amount, stirs 2min, finally carries out
3min direct flotation roughing decalcification, obtains low calcium magnesite concentrate.During test, flotation device revolving speed 1600r/min is set.
In the present embodiment, it is 47.73%, SiO that the main component of low calcium magnesite concentrate is MgO by weight percentage2For
0.22%, CaO 0.19%；MgO in low calcium magnesite concentrate accounts for 81.25% of MgO total weight in raw material.
Embodiment 4
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, process flow diagram are shown in Fig. 1,
The following steps are included:
Step 1: ore grinding
High calcium low-grade magnesite raw material is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, grade
It is the 83% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；
Step 2: sizing mixing
(1) NaOH is added in deionized water, obtains the deionized water that pH value is 11, is matched with the deionized water that pH value is 11
System, obtaining mass concentration is 1.5g/L；
It (2) is less than 74 μm and 83% magnesite powder of the total magnesite powder quality of Zhan is placed in extension groove type floatation cell by grade
In, deionized water and inhibitor EGTA solution is added, wherein press solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=70mg:1L,
And be uniformly mixed, it sizes mixing, obtains magnesite ore pulp；Wherein, the mass concentration of magnesite is 35% in magnesite ore pulp；
Step 3: direct flotation roughing decalcification
At room temperature, the NaOH aqueous solution that mass fraction is 4% is added to magnesite ore pulp first, adjusts pH value to after 11,
2min is stirred, until ore pulp is uniform, obtains the magnesite ore pulp that pH value is 11；
In the magnesite ore pulp for being 11 to pH value, the inhibitor calgon water that mass concentration is 2.5mg/L is first added
The collecting agent aqueous solution sodium oleate that aqueous solution sodium oleate molar concentration is 0.06mol/L is added after mixing evenly in solution, wherein
It is 40mg/L that calgon additional amount, which accounts for magnesite ore pulp amount, and it is 130mg/L that enuatrol additional amount, which accounts for magnesite ore pulp amount, is stirred
2min is mixed, No. 2 oil of foaming agent are then added, it is 4mg/L that No. 2 oily additional amounts, which account for magnesite ore pulp amount, stirs 2min, finally carries out
3min direct flotation roughing decalcification, obtains low calcium magnesite concentrate.During test, flotation device revolving speed 1900r/min is set.
In the present embodiment, it is 48.05%, SiO that the main component of low calcium magnesite concentrate is MgO by weight percentage2For
0.25%, CaO 0.39%；MgO in low calcium magnesite concentrate accounts for 87.69% of MgO total weight in raw material.
Embodiment 5
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 1, difference exists
In, by solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=50mg:1L, inhibitor calgon: magnesite ore pulp=40mg:
1L, it is 47.23%, SiO that the main component of obtained low calcium magnesite concentrate is MgO by weight percentage2For 0.13%, CaO
It is 0.59%；MgO in low calcium magnesite concentrate accounts for 88.15% of MgO total weight in raw material.
Embodiment 6
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 1, difference exists
In, by solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=60mg:1L, inhibitor calgon: magnesite ore pulp=40mg:
1L, it is 47.73%, SiO that the main component of obtained low calcium magnesite concentrate is MgO by weight percentage2For 0.09%, CaO
It is 0.39%；MgO in low calcium magnesite concentrate accounts for 86.35% of MgO total weight in raw material.
Embodiment 7
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 1, difference exists
In, by solid-to-liquid ratio, inhibitor EGTA: magnesite ore pulp=70mg:1L, inhibitor calgon: magnesite ore pulp=50mg:
1L, it is 48.23%, SiO that the main component of obtained low calcium magnesite concentrate is MgO by weight percentage2For 0.11%, CaO
It is 0.42%；MgO in low calcium magnesite concentrate accounts for 89.15% of MgO total weight in raw material.
Embodiment 8
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 2, difference exists
In in magnesium slag, grade is the 75% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；Obtained low calcium water chestnut
It is 48.61%, SiO that the main component of magnesium mine concentrate is MgO by weight percentage2For 0.21%, CaO 0.27%；Low calcium water chestnut
MgO in magnesium mine concentrate accounts for 86.26% of MgO total weight in raw material.
Embodiment 9
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 3, difference exists
In in magnesium slag, grade is the 80% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；Obtained low calcium water chestnut
It is 47.91%, SiO that the main component of magnesium mine concentrate is MgO by weight percentage2For 0.11%, CaO 0.29%；Low calcium water chestnut
MgO in magnesium mine concentrate accounts for 84.26% of MgO total weight in raw material.
Embodiment 10
A kind of method that EGTA and SHMP collaboration inhibition is used for magnesite flotation decalcification, with embodiment 4, difference exists
In in magnesium slag, grade is the 75% of the total magnesite powder quality of quality Zhan of the magnesite powder less than 74 μm；Obtained low calcium water chestnut
It is 49.01%, SiO that the main component of magnesium mine concentrate is MgO by weight percentage2For 0.21%, CaO 0.07%；Low calcium water chestnut
MgO in magnesium mine concentrate accounts for 89.06% of MgO total weight in raw material.
Claims (11)
1. a kind of EGTA and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, including ore grinding, sizes mixing, direct flotation roughing
Decalcification, which is characterized in that it is described to size mixing, it inhibitor EGTA solution is added in magnesite ore pulp, is sized mixing；Described
In direct flotation roughing decalcification, inhibitor SHMP is added and is adjusted in the magnesite ore pulp that pH value is 10~12, subsequent top-up is carried out
Select roughing decalcification；
By solid-to-liquid ratio, EGTA: magnesite ore pulp=(40~80) mg:1L, by solid-to-liquid ratio, SHMP: magnesite ore pulp=(30~
50) mg:1L；Wherein, in magnesite ore pulp, the mass concentration of magnesite powder is 20~40%.
2. EGTA as described in claim 1 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
It is the mass concentration that 10~12 deionized waters are formulated is 0.5~1.5g/L that the inhibitor EGTA solution, which is using pH value,
Inhibitor solution.
3. EGTA as described in claim 1 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
The inhibitor SHMP is configured to the use of inhibitor SHMP solution, and the mass concentration of inhibitor SHMP solution is 1.0~2.5g/
L。
4. EGTA as described in claim 1 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, the ore grinding are as follows:
High calcium low-grade magnesite is crushed, ball milling obtains magnesite powder；Wherein, in magnesite powder, the magnesite of grade < 74 μm
The 75~85% of the total magnesite powder quality of the quality Zhan of miberal powder.
5. EGTA as claimed in claim 4 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
In the ore grinding, the high calcium low-grade magnesite, it is 20 that main component and each ingredient are MgO by weight percentage
~30%, CaO are 20~30%, SiO2It is 0~0.5%.
6. EGTA as described in claim 1 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, and described sizes mixing, specifically:
Magnesite powder is placed in floatation equipment, deionized water and inhibitor EGTA solution is added, and be uniformly mixed, is adjusted
Slurry obtains the magnesite ore pulp that mass concentration is 20~40%.
7. EGTA as described in claim 1 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
The EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, the direct flotation roughing decalcification, specifically
Are as follows:
1) at room temperature, into magnesite ore pulp, NaOH is added, adjusts pH value to after 10~12, stirs evenly, obtaining pH value is 10
~12 magnesite ore pulp；
2) in the magnesite ore pulp for being 10~12 to pH value, inhibitor SHMP is added, after mixing, collecting agent oleic acid is added
Sodium stirs evenly, and then carries out direct flotation roughing decalcification, obtains low calcium magnesite concentrate；Wherein, by solid-to-liquid ratio, collecting agent oil
Collecting agent enuatrol in acid sodium aqueous solution: magnesite ore pulp=(100~140) mg:1L.
8. EGTA as claimed in claim 7 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, which is characterized in that
In the direct flotation roughing decalcification, after collecting agent enuatrol is added, foaming agent is added, is stirred evenly, finally carried out just
Roughing flotation decalcification, the foaming agent is No. 2 oil, by solid-to-liquid ratio, No. 2 oil: magnesite ore pulp=(4~6) mg:1L.
9. EGTA as claimed in claim 7 or 8 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, feature exists
In in the direct flotation roughing decalcification, the NaOH is the NaOH aqueous solution that mass fraction is 1~5%；
Described stirs evenly, stirring rate be 1600~1900rpm, mixing time be 2~5min, the direct flotation time be 3~
5min；
The collecting agent enuatrol is the aqueous solution sodium oleate that molar concentration is 0.01~0.05mol/L.
10. EGTA as claimed in claim 7 or 8 and SHMP collaboration inhibits the method for being used for magnesite flotation decalcification, feature
It is, in the direct flotation roughing decalcification, the low calcium magnesite concentrate main component and each ingredient percentage by weight
Than for MgO 47.5~48.5%, SiO2≤ 0.3%, CaO≤0.6%.
11. the EGTA and SHMP collaboration as described in claim 1~7 any one inhibit the side for being used for magnesite flotation decalcification
Method, which is characterized in that the EGTA and SHMP collaboration inhibits in the method for magnesite flotation decalcification, low calcium magnesite essence
The rate of recovery of mine is 70~85% by weight percentage, and the MgO rate of recovery in low calcium magnesite concentrate is 65 by weight percentage
~75%.
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| PCT/CN2019/075794 WO2020155232A1 (en) | 2019-01-31 | 2019-02-22 | Method for decalcification of magnesite by flotation by means of egta and shmp synergistic inhibition |
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| CN111036414A (en) * | 2019-11-28 | 2020-04-21 | 东北大学 | Method for flotation decalcification of magnesite by using inhibitor STPP |
| CN111036416A (en) * | 2019-11-28 | 2020-04-21 | 东北大学 | Application of efficient inhibitor 5' -ATP-2Na in magnesite direct flotation decalcification |
| WO2020155232A1 (en) * | 2019-01-31 | 2020-08-06 | 东北大学 | Method for decalcification of magnesite by flotation by means of egta and shmp synergistic inhibition |
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