CN105883863A - Method for co-production of magnesium hydroxide, calcium hydroxide and calcium chloride from boron mud - Google Patents
Method for co-production of magnesium hydroxide, calcium hydroxide and calcium chloride from boron mud Download PDFInfo
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- CN105883863A CN105883863A CN201410504543.7A CN201410504543A CN105883863A CN 105883863 A CN105883863 A CN 105883863A CN 201410504543 A CN201410504543 A CN 201410504543A CN 105883863 A CN105883863 A CN 105883863A
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- magnesium
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- chloride
- boron mud
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Abstract
The invention discloses a method for co-production of magnesium hydroxide, calcium hydroxide and calcium chloride from boron mud and relates to the field of inorganic chemical three-waste treatment and integrated utilization. The method comprises co-producing magnesium hydroxide, calcium hydroxide and calcium chloride through acid treatment recovery and synthesis and purification. The acid treatment recovery process comprises that boron mud is subjected to steam heating and then is subjected to liquid-solid separation under action of a spin-drying centrifugal machine so that the filtrate mainly containing boric acid is obtained, the filtrate is deep processed, magnesium oxide in the filter cake boron mud and hydrochloric acid undergo a reaction in a first corrosion-resistant reactor to produce a magnesium chloride hydrate, calcium chloride and minute quantity of manganese chloride, the magnesium chloride hydrate, calcium chloride and manganese chloride are filtered to form filter cake silica and the filter cake is deep processed. The synthesis and purification process comprises that the clear filtrate is purified through an appropriate amount of magnesium hydrate and then is filtered so that a pure magnesium chloride dihydrate clear liquid is obtained, the clear magnesium chloride and calcium hydroxide undergo a reaction in a second corrosion-resistant reactor and the reaction product is heated and dried to form a magnesium hydroxide product. The method improves boron mud waste material treatment economic benefits.
Description
Technical field
The present invention relates to the technical field of the inorganic chemical industry disposal of three wastes and comprehensive utilization, particularly relate to one and utilize boron mud to produce hydrogen
Magnesium oxide co-producing calcium hydroxide and the method for calcium chloride.
Background technology
Boron mud is with boromagnesite (2MgO B2O3·H2O) it is raw material, is mixed with soda by roasting, pulverizing, take carbon water law
Produce Borax (Na2B4O7·10H2O), remaining solid waste after washing, crystallization process extract Borax.Producing one ton of Borax can
Producing 4 tons of boron mud, a borax plant producing 8000 tons per year, can produce boron mud every year is 3.2 ten thousand tons.Owing to the discharge capacity of boron mud is relatively big,
The current multiple comprehensive Utilization Ways of domestic employing, in addition to producing light magnesium carbonate and magnesium oxide and plastic and rubber filler, also produces boron
Mei Lin compound fertilizer, make honeycomb briquette coal charging and do architectural Borax etc..
Magnesium in boron mud is typically all presented in magnesium carbonate, sometimes has difference also with the mineral products difference of boromagnesite.
The component of production light magnesium carbonate boron mud is such that magnesium oxide and accounts for 38%, and silicon dioxide accounts for 20%, and carbon dioxide accounts for 17%,
Boron oxide accounts for 3%, and calcium oxide accounts for 3%, and manganese oxide accounts for 0.11%, and other is moisture content.
Boron mud washing liquid is the inevitable step processing and carrying out before processing boron mud, is because diboron trioxide is dissolved in the characteristic of hot water
Carry out extracting.Otherwise it can bring a lot of inconvenience, the most in advance with steam or hot water other materials are extracted in processing when
Boric anhydride is dissolved formation boric acid be very important.So material of both solid-liquor separation extracts all very convenient, the material of extraction
Also compare pure.
One, should improve constantly the value of output object to the utilization of boron mud, product that some markets of output are in short supply, that added value is big,
To improve the economic benefit that boron mud utilizes.
They are two years old, it is well known that the utilization of boron mud is relevant with magnesium.The compound of magnesium has suitable economic worth, therefore, at place
In the technical scheme of reason boron mud refuse, the recycling of magnesium should be considered as far as possible, the recycling of magnesium is put in the first place.Magnesium in recent years
Organism is acted on and is paid close attention to by people.Magnesium has lax, expansion muscle, the effect of blood vessel, and for the mankind being can not
The mineral lacked.In recent years, magnesium is greatly decreased in food polish, therefore easily occurs in the diet of people that magnesium is not enough
Situation, therefore, strengthening magnesium food welcomed by the people.In the food of strengthening magnesium, commonly used magnesium hydroxide.Hydrogen-oxygen
Change magnesium is in addition to magnesium supplement in food, or one uses chemical products widely.
Therefore, in the technical scheme processing boron mud refuse, the recycling of the compound of boron should be considered, as produced hydrogen-oxygen as far as possible
Change magnesium.
Summary of the invention
It is contemplated that for the utilization of boric sludge waste and the market demand, it is provided that one utilizes boron mud to produce magnesium hydroxide with coproduction hydrogen-oxygen
Change calcium and the method for calcium chloride.
To achieve these goals, a kind of present invention method utilizing boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and calcium chloride
Technical scheme is as follows.
A kind of utilizing boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, boron mud is reclaimed by acid treatment and synthesizes
Purifying process, prepares magnesium hydroxide, co-producing calcium hydroxide and calcium chloride simultaneously:
Described acid treatment recovery process is: boron mud steam is heated to 61～81 DEG C and maintains 1.1～2.1 hours, then with getting rid of
Dry centrifuge solid-liquor separation, obtains the filtrate based on boric acid and sends to deep processing separately；Magnesium oxide in filter cake boron mud is pressed with hydrochloric acid
The mass ratio 1: 1.61～2.05 of pure material meter, reacts in the first corrosion-resistant reactor, stirring slowly issue biochemical instead
Should；Reaction generates the hydrate of magnesium chloride, calcium chloride and minimal amount of manganese chloride；It is filtrated to get filter cake silicon dioxide to send to separately
Deep processing；The filtrate of clarification does further purification；
Described synthesizing and purifying technique is: the clear filtrate that described acid treatment recovery process obtains with appropriate magnesium hydroxide impurity and purification,
Filter and finally obtain two pure aqueous magnesium chloride clear liquor；Calcium chloride and manganese chloride generate respectively hydroxide precipitate scrubbed drying,
Drying and crushing, sizing screening and packaging of checking the weight respectively obtain calcium hydroxide and manganous hydroxide product；And the magnesium chloride generated improves
The concentration of original solution；The clarification magnesium chloride obtained is reacted on calcium hydroxide mass ratio 1: 0.56～0.99 based on pure material
In second corrosion-resistant reactor；Magnesium hydroxide and calcium chloride mixed solution is generated under stirring slowly；It is filtrated to get filter cake scrubbed
Dry, drying and crushing and check the weight and be packaged to be magnesium hydroxide products；The clear filtrate obtained is sent into decompression distillator and carries out decompression steaming
Evaporating, being ejected by distillate when solution reaches saturated concentration time cooled has a crystallization, scrubbed, dry and pulverize and obtain
Calcium chloride dihydrate crystal product.
Boron mud used by the present invention is the boron mud producing light magnesium carbonate, and its component is such that magnesium oxide, silicon dioxide, dioxy
Change carbon, boron oxide, calcium oxide, manganese oxide, also moisture content.Certainly, other boron mud of similar components also can be suitable for the present invention it
Magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride.
The chemical equation of the present invention is:
MgO+2HCl=MgCl2+H2O
CaO+2HCl=CaCl2+H2O
CaCl2+Mg(OH)2=MgCl2+Ca(OH)2
MnO+2HCl=MnCl2+H2O
MnCl2+Mg(OH)2=MgCl2+Mn(OH)2
MgCl2+Ca(OH)2=Mg (OH)2+CaCl2
The beneficial effects of the present invention is: one, it is provided that a kind of one utilize boron mud produce magnesium hydroxide with coproduction of calcium hydroxide and
The method of calcium chloride, opens up an approach for effectively processing boric sludge waste.Its two, preparation includes magnesium hydroxide, calcium hydroxide
And calcium chloride, wherein magnesium hydroxide is the best-selling product that a kind of economic worth is bigger, improves the economic benefit processing boric sludge waste.
Its three, small investment, especially suitable to the boron mud of boron mud and similar components used by process for producing light magnesium carbonate, it may be said that to open
One Tiao Xin road.Its four, the purity of preparation is high, and quality is guaranteed.
Detailed description of the invention
Embodiment one
A kind of utilizing boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, boron mud is reclaimed by acid treatment and synthesizes
Purifying process, prepares magnesium hydroxide, co-producing calcium hydroxide and calcium chloride simultaneously:
Described acid treatment recovery process is: takes 500 kilograms of boron mud (wherein content of magnesia 38%), is heated to by boron mud steam
61～81 DEG C maintain 1.1～2.1 hours, then with drying centrifuge solid-liquor separation, obtain the filtrate based on boric acid and send to separately
Deep processing；Magnesium oxide in filter cake boron mud and the hydrochloric acid mass ratio 1: 1.63 based on pure material, reacts on the first corrosion-resistant reaction
Device, issues biochemical reaction in stirring slowly；Reaction generates the hydrate 404 kilograms of magnesium chloride, and other component generates calcium chloride
Also has minimal amount of manganese chloride；It is filtrated to get filter cake silicon dioxide and sends to deep processing separately；The filtrate of clarification does further purification:
Described synthesizing and purifying technique is: the clear filtrate that described acid treatment recovery process obtains with appropriate magnesium hydroxide impurity and purification,
Filter and finally obtain two pure aqueous magnesium chloride clear liquor；Calcium chloride and manganese chloride generate respectively hydroxide precipitate scrubbed drying,
Drying and crushing, sizing screening and packaging of checking the weight respectively obtain calcium hydroxide and manganous hydroxide product；And the magnesium chloride generated improves
The concentration of original solution；404 kilograms of the magnesium chloride of clarification obtained is reacted with calcium hydroxide mass ratio 1: 0.58 based on pure material
In the second corrosion-resistant reactor；183.4 kilograms of magnesium hydroxide and 351.3 kilograms of calcium chloride mixed solutions are generated under stirring slowly；
It is filtrated to get the scrubbed drying of filter cake, drying and crushing and checks the weight and be packaged to be magnesium hydroxide products；The clear filtrate obtained is sent into and subtracts
Pressure distillator carries out decompression distillation, and being ejected by distillate when solution reaches saturated concentration time cooled has crystallization, through washing
Wash, dry and pulverize and obtain calcium chloride dihydrate crystal product.
Boron mud used by the present embodiment is the boron mud producing light magnesium carbonate, and its component is such that magnesium oxide 38%, silicon dioxide
20%, carbon dioxide 17%, boron oxide 3%, calcium oxide 3%, manganese oxide 0.11%, other are moisture content.Certainly, similar
Other boron mud of component also can be suitable for the magnesium hydroxide with coproduction of calcium hydroxide of the present invention and the method for calcium chloride.
Embodiment two
A kind of utilizing boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, boron mud is reclaimed by acid treatment and synthesizes
Purifying process, prepares magnesium hydroxide, co-producing calcium hydroxide and calcium chloride simultaneously:
Described acid treatment recovery process is: take boron mud 500 kilograms (wherein containing magnesium oxide 38%), boron mud steam is heated to 61～
81 DEG C maintain 1.1～2.1 hours, then with drying centrifuge solid-liquor separation, obtain the filtrate based on boric acid and send to and the most deeply add
Work；Magnesium oxide in filter cake boron mud and the hydrochloric acid mass ratio 1: 1.83 based on pure material, reacts on the first corrosion-resistant reactor,
Biochemical reaction is issued in stirring slowly；Reaction generates the hydrate 453 kilograms of magnesium chloride, and other component generates calcium chloride to be also had
Minimal amount of manganese chloride；It is filtrated to get filter cake silicon dioxide and sends to deep processing separately；The filtrate of clarification does further purification；
Described synthesizing and purifying technique is: the clear filtrate that described acid treatment recovery process obtains with appropriate magnesium hydroxide impurity and purification,
Filter and finally obtain two pure aqueous magnesium chloride clear liquor；Calcium chloride and manganese chloride generate respectively hydroxide precipitate scrubbed drying,
Drying and crushing, sizing screening and packaging of checking the weight respectively obtain calcium hydroxide and manganous hydroxide product；And the magnesium chloride generated improves
The concentration of original solution；Anti-with calcium hydroxide mass ratio 1: 0.78 based on pure material for the clarification magnesium chloride of 453 kilograms obtained
Should be in the second corrosion-resistant reactor；Under stirring slowly, generate 276.6 kilograms of magnesium hydroxide and the mixing of 529.8 kilograms of calcium chloride is molten
Liquid；It is filtrated to get the scrubbed drying of filter cake, drying and crushing and checks the weight and be packaged to be magnesium hydroxide products；The clear filtrate obtained is sent
The distillator that enters to reduce pressure carries out decompression distillation, and being ejected by distillate when solution reaches saturated concentration time cooled has crystallization,
Scrubbed, dry and pulverize and obtain calcium chloride dihydrate crystal product.
Boron mud used by the present embodiment is the boron mud producing light magnesium carbonate, and its component is such that magnesium oxide 38%, silicon dioxide
20%, carbon dioxide 17%, boron oxide 3%, calcium oxide 3%, manganese oxide 0.11%, other are moisture content.Certainly, similar
Other boron mud of component also can be suitable for the magnesium hydroxide with coproduction of calcium hydroxide of the present invention and the method for calcium chloride.
Embodiment three
A kind of utilizing boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, boron mud is reclaimed by acid treatment and synthesizes
Purifying process, prepares magnesium hydroxide, co-producing calcium hydroxide and calcium chloride simultaneously:
Described acid treatment recovery process is: take boron mud 500 kilograms (wherein containing magnesium oxide 38%), boron mud steam is heated to 61～
81 DEG C maintain 1.1～2.1 hours, then with drying centrifuge solid-liquor separation, obtain the filtrate based on boric acid and send to and the most deeply add
Work；Magnesium oxide in filter cake boron mud and the hydrochloric acid mass ratio 1: 2.03 based on pure material, reacts on the first corrosion-resistant reactor,
Biochemical reaction is issued in stirring slowly；Reaction generates the hydrate 503 kilograms of magnesium chloride, and other component generates calcium chloride to be also had
Minimal amount of manganese chloride；It is filtrated to get filter cake silicon dioxide and sends to deep processing separately；The filtrate of clarification does further purification；
Described synthesizing and purifying technique is: the clear filtrate that described acid treatment recovery process obtains with appropriate magnesium hydroxide impurity and purification,
Filter and finally obtain two pure aqueous magnesium chloride clear liquor；Calcium chloride and manganese chloride generate respectively hydroxide precipitate scrubbed drying,
Drying and crushing, sizing screening and packaging of checking the weight respectively obtain calcium hydroxide and manganous hydroxide product；And the magnesium chloride generated improves
The concentration of original solution；The 503 kilograms of clarification magnesium chlorides obtained are reacted with calcium hydroxide mass ratio 1: 0.98 based on pure material
In the second corrosion-resistant reactor；385.8 kilograms of magnesium hydroxide and 739.1 kilograms of calcium chloride mixed solutions are generated under stirring slowly；
It is filtrated to get the scrubbed drying of filter cake, drying and crushing and checks the weight and be packaged to be magnesium hydroxide products；The clear filtrate obtained is sent into and subtracts
Pressure distillator carries out decompression distillation, and being ejected by distillate when solution reaches saturated concentration time cooled has crystallization, through washing
Wash, dry and pulverize and obtain calcium chloride dihydrate crystal product.
Boron mud used by the present embodiment is the boron mud producing light magnesium carbonate, and its component is such that magnesium oxide 38%, silicon dioxide
20%, carbon dioxide 17%, boron oxide 3%, calcium oxide 3%, manganese oxide 0.11%, other are moisture content.Certainly, similar
Other boron mud of component also can be suitable for the magnesium hydroxide with coproduction of calcium hydroxide of the present invention and the method for calcium chloride.
Claims (2)
1. one kind utilizes boron mud to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, it is characterised in that boron mud is by acid
Process and reclaim and synthesizing and purifying technique, prepare magnesium hydroxide, co-producing calcium hydroxide and calcium chloride simultaneously；Work is reclaimed in described acid treatment
Skill is: boron mud steam is heated to 61～81 DEG C and maintains 1.1～2.1 hours, then with drying centrifuge solid-liquor separation,
Deep processing separately is sent to the filtrate based on boric acid；Magnesium oxide in filter cake boron mud and the hydrochloric acid mass ratio 1 based on pure material:
1.61～2.05, react in the first corrosion-resistant reactor, stirring；Reaction generates the hydrate of magnesium chloride, calcium chloride and chlorination
Manganese；It is filtrated to get filter cake silicon dioxide and sends to deep processing separately；The filtrate of clarification does further purification；Described synthesizing and purifying work
Skill is: the clear filtrate that described acid treatment recovery process obtains appropriate magnesium hydroxide impurity and purification, filtration finally obtain pure
Two aqueous magnesium chloride clear liquor；Calcium chloride and manganese chloride generate hydroxide precipitation scrubbed drying, drying and crushing, classification respectively
Screening and packaging respectively obtain calcium hydroxide and manganous hydroxide product；And the magnesium chloride generated improves the concentration of original solution；?
To clarification magnesium chloride react in the second corrosion-resistant reactor with calcium hydroxide mass ratio 1: 0.56～0.99 based on pure material；
Under agitation generate magnesium hydroxide and calcium chloride mixed solution；It is filtrated to get the scrubbed drying of filter cake, drying and crushing and is packaged to be
Magnesium hydroxide products；The clear filtrate obtained is sent into decompression distillator and carries out decompression distillation, will when solution reaches saturated concentration time
Distillate ejects cooled has a crystallization, scrubbed, dry and pulverize and obtain calcium chloride dihydrate crystal product.
The most according to claim 1 a kind of boron mud is utilized to produce magnesium hydroxide with coproduction of calcium hydroxide and the method for calcium chloride, its
It is characterised by: described boron mud, containing magnesium oxide, silicon dioxide, carbon dioxide, boron oxide, calcium oxide, oxidation in its component
Manganese and moisture content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410504543.7A CN105883863A (en) | 2014-09-16 | 2014-09-16 | Method for co-production of magnesium hydroxide, calcium hydroxide and calcium chloride from boron mud |
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|---|---|---|---|
| CN201410504543.7A CN105883863A (en) | 2014-09-16 | 2014-09-16 | Method for co-production of magnesium hydroxide, calcium hydroxide and calcium chloride from boron mud |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821303A (en) * | 2018-07-13 | 2018-11-16 | 大连地拓环境科技有限公司 | A kind of method of magnesium and boron mineral |
| CN114605700A (en) * | 2022-03-15 | 2022-06-10 | 吉林大学 | Method for preparing aluminum hydroxide and magnesium hydroxide composite flame retardant and co-producing ammonium chloride |
-
2014
- 2014-09-16 CN CN201410504543.7A patent/CN105883863A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821303A (en) * | 2018-07-13 | 2018-11-16 | 大连地拓环境科技有限公司 | A kind of method of magnesium and boron mineral |
| CN108821303B (en) * | 2018-07-13 | 2021-07-20 | 大连地拓环境科技有限公司 | Comprehensive utilization method of boric sludge |
| CN114605700A (en) * | 2022-03-15 | 2022-06-10 | 吉林大学 | Method for preparing aluminum hydroxide and magnesium hydroxide composite flame retardant and co-producing ammonium chloride |
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Application publication date: 20160824 |