CN108658103A - A kind of utilization producing method of magnesium oxide and byproduct using peridotite ore - Google Patents
A kind of utilization producing method of magnesium oxide and byproduct using peridotite ore Download PDFInfo
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- CN108658103A CN108658103A CN201810569589.5A CN201810569589A CN108658103A CN 108658103 A CN108658103 A CN 108658103A CN 201810569589 A CN201810569589 A CN 201810569589A CN 108658103 A CN108658103 A CN 108658103A
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- Prior art keywords
- ore
- magnesium
- peridotite
- liquid
- utilization
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/02—Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates
Abstract
The present invention relates to a kind of utilizations producing method of magnesium oxide and byproduct using peridotite ore, and process system science, production efficiency is high, good product quality, mating can utilize a variety of byproducts, effectively reduce pollution.The technical solution adopted by the present invention is as follows：It is a kind of to produce method of magnesium oxide using peridotite ore, include the following steps：（1）Peridotite ore pickling；（2）Pickling liquid and leached mud are carried out to remove iron；（3）Pickling liquid and leached mud are carried out to remove nickel；（4）Pickling liquid and leached mud are subjected to magnesium sinking；（5）The magnesium hydroxide that magnesium sinking process obtains is calcined.
Description
One, technical field：
The present invention relates to a kind of methods producing chemical products using ore, and in particular to a kind of to be given birth to using peridotite ore
Produce the utilization of method of magnesium oxide and byproduct.
Two, background technology：
Carbonizatin method is production magnesia and its intermediate products.The main production process of light magnesium carbonate, but carbonizatin method produces
Magnesium compound method has two big deficiencies：First is calcium oxide impurity too high levels in product magnesia, and especially dolomite is carbonized
Method is extremely difficult to this standard.Second is that raw material availability is low, and the raw material of producing magnesium oxide by carbonization method, actual consumption is big
It is higher than theoretical value greatly, a large amount of carbonization waste residues is generated in production, environment is not only polluted, also results in the waste of resource.Dolomite carbon
The critical issue of change method production magnesia is that it is difficult to be completely separated to solve calcium and magnesium.Currently, the improvement to dolomite carbonized bodies system
Method mainly has secondary carbonization, scale pressure carbonization, addition organic additive.But these methods higher, technique stream because of production cost
Journey is complicated and limits it and promotes the use of.
Three, invention content
The purpose of the present invention is to provide a kind of utilization producing method of magnesium oxide and byproduct using peridotite ore,
Its process system science, production efficiency is high, good product quality, mating can utilize a variety of byproducts, effectively reduce pollution.
To achieve the above object, the technical solution adopted by the present invention is as follows：
It is a kind of to produce method of magnesium oxide using peridotite ore, it is characterised in that：Include the following steps：
(1) peridotite ore pickling；
(2) pickling liquid and leached mud are carried out removing iron；
(3) pickling liquid and leached mud are carried out removing nickel；
(4) pickling liquid and leached mud are subjected to magnesium sinking；
(5) magnesium hydroxide that magnesium sinking process obtains is calcined.
Described step (1) the peridotite ore pickling, includes the following steps：
1) prepared by ore：
(1) ore is first passed through jaw crusher coarse crushing；
(2) using jaw crusher medium crushing and screening+6mm；
(3) double-roll crusher grinding and sieving+2mm is used；
(4) ore is ground to 0.074mm with ball mill；
2) acid solution is debugged：
(1) sulfuric acid is added in the ore of milled, and sulfuric acid is 0.9ml/g with ore ratio；
(2) solid-to-liquid ratio 1 is added water to：4；
3) it leaches：
(1) time：2h；
(2) temperature：85±2℃；
4) prepared by immersion liquid：
Peridotite ore is controlled by repeatedly broken, ball milling, fineness in 0.074mm, sulfuric acid by sour mine ratio 0.9ml/
G, it is 1 to add water to solid-to-liquid ratio：4,85 ± 2 DEG C are heated to, is kept for 2 hours, the magnesium elements in peridotite ore is made fully to be dissolved into
In acid solution, by separation, washing, filtering, be prepared into pickle, then by pickle when magnesia detach.
The step (2) carries out pickling liquid and leached mud to remove iron, includes the following steps：
Enough NaClO are added3As oxidant, by Fe2+It is oxidized to Fe3+, PH controls are 1.4~2,70 DEG C of solution temperature,
30min is aoxidized, 90 DEG C is then heated to and carries out removing iron, separated the iron in solution using goethite process.
The step (3) carries out pickling liquid and leached mud to remove nickel, includes the following steps：
Nickel is detached with magnesia by vulcanization heavy nickel, reaction temperature is room temperature, pH value 6~9, time 1h.
Pickling liquid and leached mud are carried out magnesium sinking by the step (4), are included the following steps：
It selects NaOH as magnesium sinking agent, enough NaOH is added, solution PH >=12 obtain the higher MgOH precipitations of purity；Instead
Answer condition：Temperature 50 C, time 0.5h, PH >=12.
The step (5) calcines the magnesium hydroxide that magnesium sinking process obtains, and includes the following steps：
By 700~1000 DEG C of calcinings of magnesium hydroxide, light MgO is obtained；Magnesium hydroxide >=1500 DEG C are calcined, reheating MgO is obtained；
Calcination time is 1h.
A kind of utilization method for the byproduct producing magnesia using peridotite ore, it is characterised in that：
Using the acid leaching residue amorphous silica obtained by peridotite ore pickling liquid as raw material, alkali soaks at 100 DEG C
(NaOH) sodium silicate solution, reaction condition be can be prepared by：Liquid-solid ratio 3:1,100 DEG C of reaction temperature, extraction time 30min, NaOH
A concentration of 16%；
Sodium silicate solution reacts in the reaction vessel with acid solution, and reactant is separated by solid-liquid separation to obtain amorphous silica filter
Cake and remaining sodium silicate mother liquor, sodium silicate mother liquor recycling, amorphous silica filter cake through washing and drying process at
Enter spray dryer drying after reason and amorphous silica product is made；Reaction condition：PH7, reaction time 30min, acid are dense
Degree 20%, 70 DEG C of reaction temperature, digestion time 1h.
After being acidified production of silica white, the sodium sulphate in filtrate after separation is dry, obtains byproduct sulphur by evaporative crystallization
Sour sodium.
Compared with prior art, it has the following advantages that and effect：
1, the present invention produces high-purity magnesium oxide by raw material of peridotite ore, and abundant raw material, production cost are low；
2, present invention process is simple, is easy to industrialized production；Final products purity is high, thus its is widely used.
3, mating chemical products can be made using a variety of byproducts in the present invention, effectively reduce environmental pollution, while effectively drop
Low production cost.
Four, it illustrates：
Fig. 1 is immersion liquid preparation technology flow chart.
Fig. 2 is deferrization process flow chart.
Fig. 3 is the heavy nickel process flow chart of vulcanization.
Fig. 4 is that peridotite ore pickle liquor prepares sodium sulphate process flow chart.
Fig. 5 is that peridotite ore extracts magnesia and byproduct comprehensive utilization process flow chart.
Five, specific implementation mode：
Embodiment：
1. peridotite ore acid leaching process
1) prepared by ore
(1) ore is first passed through jaw crusher coarse crushing；
(2) using jaw crusher medium crushing and screening+6mm；
(3) double-roll crusher grinding and sieving+2mm is used；
(4) ore is ground to 0.074mm with ball mill.
2) acid solution is debugged
(1) sulfuric acid is added in the ore of milled, and sulfuric acid is 0.9ml/g with ore ratio；
(2) solid-to-liquid ratio 1 is added water to：4.
3. leaching
(1) time：2h；
(2) temperature：85±2℃.
4. immersion liquid preparation process flow
Referring to Fig. 1, peridotite ore by repeatedly broken, ball milling, fineness control presses sour mine in 0.074mm, sulfuric acid
Than 0.9ml/g, it is 1 to add water to solid-to-liquid ratio：4,85 ± 2 DEG C are heated to, is kept for 2 hours, the magnesium elements in peridotite ore is made to fill
Point be dissolved into acid solution, by separation, washing, filtering, be prepared into pickle, then by pickle when magnesia divided
From.
2. the deferrization process of pickle liquor and leached mud
1) main points
By the analysis to pickle liquor, iron content is higher in solution, need to be separated, to obtain the richness of higher quality
Magnesium leachate.This technology is separated the iron in solution using goethite process.
2) it chemically reacts
Sufficient oxidizer is added, by Fe2+It is oxidized to Fe3+, NaClO in an acidic solution3There is the effect of Strong oxdiative object, uses it
As oxidation agent, oxidation process chemical equation is as follows：
6Fe2++ClO3+6H→6Fe3++Cl+3H2O
3) separation of iron in goethite form, chemical equation
Fe3++H2O→FOOH↓+3H+
(1) reaction temperature：≥90℃
(2) pH value：3~5
4) deferrization process flow
Referring to Fig. 2, this technique is separated the iron in solution using goethite process.It was reacted by chemical equation calculating
Sufficient oxidizer is added in Cheng Suoxu oxidizers, and PH controls in operation are aoxidized in 1.4~2,70 DEG C of solution temperature
30min then heats to 90 DEG C and carries out removing iron.
3. the heavy nickel of pickle liquor and leached mud
1) main points
By the analysis to pickle liquor, there is the nickel of certain content in solution, it need to be separated and be enriched with magnesia
At nickel sulfide product.
2) vulcanize heavy nickel chemical equation
Ni2++S2-→NiS↓
3) reaction condition
(1) reaction temperature：Room temperature
(2) pH value：6~9
(3) time：1h
4) vulcanize heavy nickel technological process
Referring to Fig. 3, the PH of the precipitation of sulfide depending on sulfide precipitation, with reaction carry out should add neutralizer,
It is best at ± 0.1 6~9, PH8.5 to stablize PH.The room temperature lower reaction time is 1h.
4. pickle liquor and leached mud magnesium sinking
1) main points
Peridotite ore leachate obtains more pure containing magnesium solution after the purification technique except iron, heavy nickel.
By Experimental Comparison, selects NaOH as magnesium sinking agent, enough NaOH are added, ensure solution PH >=12.It is heavy to can guarantee
Magnesium rate reaches 99% or more, and obtains the higher MgOH precipitations of purity.
2) chemical equation
Mg2++2OH-→Mg(OH)2↓
3) reaction condition
(1) temperature：50℃
(2) time：0.5h
(3)PH：≥12
5. peridotite ore produces the magnesium hydroxide calcine technology during magnesia
1) main points
The purpose of calcining is that magnesium hydroxide is transformed into the wider array of magnesium oxide product of purposes, and different calcination temperatures can obtain
To the magnesium oxide product of different densities, chemical property is also different from purposes.
Its cardinal principle：
2) process conditions
(1) calcination temperature：700~1000 DEG C of calcinings, obtain light MgO
>=1500 DEG C of calcinings, obtain reheating MgO
(2) calcination time：1h
The utilization technique of byproduct：
1, pickle liquor prepares white carbon (H2O·xO2Si)
1) sodium metasilicate (Na is prepared2SiO3) solution
(1) produced in conventional processes white carbon is used, needs to consume mass energy, and is utilized obtained by peridotite ore pickle liquor
Acid leaching residue (amorphous silica) is used as raw material, only alkali leaching (NaOH) need to can be prepared by water glass solution, energy consumption at 100 DEG C
It substantially reduces.
(2) chemical equation for making waterglass (Na2SiO39H2O) is as follows：
SiO2·nH2O+NaOH→Na2SiO3+nH2O
(3) reaction condition：
Liquid-solid ratio 3:1,
Reaction temperature：100℃
Extraction time 30min
When NaOH concentration is 16%
2) production of silica white
(1) main points：
Sodium silicate solution reacts at certain temperature and pH value condition with acid solution in the reaction vessel, reactant solid-liquid
Isolated amorphous silica filter cake and remaining sodium silicate mother liquor.Sodium silicate mother liquor can with recycling, unformed two
Silica filter cake enters spray dryer drying after the process such as washing and drying and amorphous silica product is made.
(2) chemical reaction equation is as follows：
Na2SiO3+H2SO4→Na2SO4+H2SiO3
(n-1)H2O+H2SiO3→SiO2·nH2O
(3) reaction condition：
pH：7；
Reaction time：30min；
Acid concentration：20%；
Reaction temperature：70℃；
Digestion time：1h.
2. pickle liquor prepares the sodium sulphate (Na in filtrate during white carbon2SO4) recycling
1) main points
A large amount of sulfuric acid and sodium hydroxide are added in entire technical process, after being acidified production of silica white, is had in filtrate
A large amount of sodium sulphate after separation is dry, can get byproduct sulfite by evaporative crystallization.
2) technological process
Referring to Fig. 4, technological process includes by metabisulfite solution evaporative crystallization, separation, drying, crushing, finished product packing.
Claims (8)
1. a kind of producing method of magnesium oxide using peridotite ore, it is characterised in that：Include the following steps：
(1) peridotite ore pickling；
(2) pickling liquid and leached mud are carried out removing iron；
(3) pickling liquid and leached mud are carried out removing nickel；
(4) pickling liquid and leached mud are subjected to magnesium sinking；
(5) magnesium hydroxide that magnesium sinking process obtains is calcined.
2. a kind of utilization peridotite ore according to claim 1 produces method of magnesium oxide, it is characterised in that：Described
Step (1) peridotite ore pickling, includes the following steps：
1) prepared by ore：
(1) ore is first passed through jaw crusher coarse crushing；
(2) using jaw crusher medium crushing and screening+6mm；
(3) double-roll crusher grinding and sieving+2mm is used；
(4) ore is ground to 0.074mm with ball mill；
2) acid solution is debugged：
(1) sulfuric acid is added in the ore of milled, and sulfuric acid is 0.9ml/g with ore ratio；
(2) solid-to-liquid ratio 1 is added water to：4；
3) it leaches：
(1) time：2h；
(2) temperature：85±2℃；
4) prepared by immersion liquid：
Peridotite ore by repeatedly broken, ball milling, fineness control is pressed sour mine ratio 0.9ml/g in 0.074mm, sulfuric acid, is added
Water to solid-to-liquid ratio is 1：4,85 ± 2 DEG C are heated to, is kept for 2 hours, the magnesium elements in peridotite ore is made fully to be dissolved into acid solution
In, by separation, washing, filtering, be prepared into pickle, then by pickle when magnesia detach.
3. a kind of utilization peridotite ore according to claim 1 or 2 produces method of magnesium oxide, it is characterised in that：Institute
The step of stating (2) carries out pickling liquid and leached mud to remove iron, includes the following steps：
Enough NaClO are added3As oxidant, by Fe2+It is oxidized to Fe3+, PH controls are 1.4~2,70 DEG C of solution temperature, oxidation
30min is then heated to 90 DEG C and carries out removing iron, separated the iron in solution using goethite process.
4. a kind of utilization peridotite ore according to claim 3 produces method of magnesium oxide, it is characterised in that：Described
Step (3) carries out pickling liquid and leached mud to remove nickel, includes the following steps：
Nickel is detached with magnesia by vulcanization heavy nickel, reaction temperature is room temperature, pH value 6~9, time 1h.
5. a kind of utilization peridotite ore according to claim 4 produces method of magnesium oxide, it is characterised in that：Described
Pickling liquid and leached mud are carried out magnesium sinking by step (4), are included the following steps：
It selects NaOH as magnesium sinking agent, enough NaOH is added, solution PH >=12 obtain the higher MgOH precipitations of purity；React item
Part：Temperature 50 C, time 0.5h, PH >=12.
6. a kind of utilization peridotite ore according to claim 5 produces method of magnesium oxide, it is characterised in that：Described
Step (5) calcines the magnesium hydroxide that magnesium sinking process obtains, and includes the following steps：
By 700~1000 DEG C of calcinings of magnesium hydroxide, light MgO is obtained；Magnesium hydroxide >=1500 DEG C are calcined, reheating MgO is obtained；Calcining
Time is 1h.
7. a kind of utilization method of byproduct producing magnesia using peridotite ore according to claim 1, special
Sign is：
Using the acid leaching residue amorphous silica obtained by peridotite ore pickling liquid as raw material, the alkali leaching (NaOH) at 100 DEG C
It can be prepared by sodium silicate solution, reaction condition：Liquid-solid ratio 3:1,100 DEG C, extraction time 30min of reaction temperature, NaOH concentration is
16%；
Sodium silicate solution reacts in the reaction vessel with acid solution, reactant be separated by solid-liquid separation to obtain amorphous silica filter cake and
Remaining sodium silicate mother liquor, sodium silicate mother liquor recycling, amorphous silica filter cake is after washing and drying process is handled
It is dried into spray dryer and amorphous silica product is made；Reaction condition：PH7, reaction time 30min, acid concentration
20%, 70 DEG C of reaction temperature, digestion time 1h.
8. a kind of utilization method of byproduct producing magnesia using peridotite ore according to claim 7, special
Sign is：
After being acidified production of silica white, the sodium sulphate in filtrate after separation is dry, obtains byproduct sulfuric acid by evaporative crystallization
Sodium.
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| CN201810569589.5A CN108658103A (en) | 2018-06-05 | 2018-06-05 | A kind of utilization producing method of magnesium oxide and byproduct using peridotite ore |
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| CN201810569589.5A CN108658103A (en) | 2018-06-05 | 2018-06-05 | A kind of utilization producing method of magnesium oxide and byproduct using peridotite ore |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635665A (en) * | 1968-08-22 | 1972-01-18 | Metallgesellschaft Ag | Process for the recovery of magnesium oxide and sulfur dioxide |
| CN103936038A (en) * | 2014-04-17 | 2014-07-23 | 宁婷婷 | Method for separating and purifying valuable elements in serpentine rock |
| CN106745103A (en) * | 2016-12-19 | 2017-05-31 | 张旭 | The method that magnesite prepares magnesia or magnesia and fibrous magnesium hydroxide |
-
2018
- 2018-06-05 CN CN201810569589.5A patent/CN108658103A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635665A (en) * | 1968-08-22 | 1972-01-18 | Metallgesellschaft Ag | Process for the recovery of magnesium oxide and sulfur dioxide |
| CN103936038A (en) * | 2014-04-17 | 2014-07-23 | 宁婷婷 | Method for separating and purifying valuable elements in serpentine rock |
| CN106745103A (en) * | 2016-12-19 | 2017-05-31 | 张旭 | The method that magnesite prepares magnesia or magnesia and fibrous magnesium hydroxide |
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Application publication date: 20181016 |