CN105883832A - Method for preparing anhydrous sodium metasilicate from waste boron mud filter residues - Google Patents
Method for preparing anhydrous sodium metasilicate from waste boron mud filter residues Download PDFInfo
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- CN105883832A CN105883832A CN201410477997.XA CN201410477997A CN105883832A CN 105883832 A CN105883832 A CN 105883832A CN 201410477997 A CN201410477997 A CN 201410477997A CN 105883832 A CN105883832 A CN 105883832A
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- boron mud
- filtrate
- sodium metasilicate
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- clarification
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Abstract
The invention discloses a method for preparing anhydrous sodium metasilicate from waste boron mud filter residues. The method comprises heating boron mud to a temperature of 59-81 DEG C through steam, keeping the temperature for 1-2h, carrying out spin-drying through a centrifugal machine to obtain boron mud filter cake, carrying out a reaction process on the boron mud filter cake and hydrochloric acid according to a pure mass ratio of 1: 1.62-2.04 in a corrosion-resistant first reactor along with slow stirring to obtain a magnesium chloride hydrate, filtering the magnesium chloride hydrate to obtain silica filter residues, carrying out a reaction process on the silica filter residues and sodium carbonate according to a pure mass ratio of 1: 1.53-1.95 in a second enclosed reactor under conditions of heating, pressure and slow stirring to obtain a sodium metasilicate aqueous solution, filtering the reaction product, feeding the clear filtrate to a reduced pressure distillation device, carrying out distillation concentration until the solution loses all crystal water, discharging the solution and carrying out cooling and crystallization to obtain an anhydrous sodium metasilicate crystal product. The method realizes re-polluted boron mud waste treatment, prevents secondary pollution and creates 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 a kind of useless boron mud filter residue system
The method of the standby zero inclined silicon of water.
Background technology
Boron mud is with boromagnesite (2MgO B2O3·H2O) it is raw material, is mixed with soda ash 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 magnesia and plastic and rubber filler, also produces boron
Mei Lin composite 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 producing light magnesium carbonate boron mud is such that magnesia 38%, silica 20%, carbon dioxide 17%, oxidation
Boron 3%, calcium oxide 3% and manganese oxide 0.11%, other are moisture content.Chlorine is made for raw material by hydrochloric acid with boric sludge waste
Compound forms solution, removes the compound that insoluble impurity obtains the magnesium of clarification.Then processing the compound of other magnesium, also having
Compound of boron etc..Therefore, being impeccable for the purity of product, quality also reaches a standard.
After boron mud improvement and utilization obtain magnesium compound and boron compound, remaining filtration waste residue is only remaining is difficult to chemistry instead
The silica answered, its content has reached 80～90%, and now exploitation silicon goods are necessary, so through research,
Successively obtain waterglass, zero water sodium metasilicate, metasilicate pentahydrate sodium and non-hydrate sodium metasilicate.
Summary of the invention
The technical problem to be solved is, processes the waste material of pollution again of boric sludge waste, comprehensive utilization, is producing
Go out outside the compound of magnesium and boron, also produce silicon product, both avoided secondary pollution, and the biggest economy can have been created for enterprise again
Benefit, is the model of the chemical industry comprehensive regulation and utilization.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method preparing the zero inclined silicon of water with useless boron mud filter residue,
Comprise the steps:
Boron mud steam is heated to 59～81 degree, maintains 1～2 hour, then dry with centrifuge, it is achieved solid-liquor separation,
Obtaining filtrate and filter cake boron mud, filtrate sends to deep processing separately；
Filter cake boron mud (magnesia meter) and hydrochloric acid are reacted on corrosion resistant first reactor with pure mass ratio 1: 1.62～2.04
In, issuing biochemical reaction in stirring slowly, reaction generates the hydrate of magnesium chloride, and other components generate calcium chloride and a small amount of
Manganese chloride, filters the hydrate of magnesium chloride, it is thus achieved that the filtrate of clarification and silica filter residue, and the filtrate of clarification is sent to the deepest
Processing；
Silica filter residue and sodium carbonate are reacted in the second airtight reactor with pure mass ratio 1: 1.53～1.95, is adding
Under conditions of heat, stirring of pressurizeing and blow slowly, reaction generates the sodium metasilicate aqueous solution, is filtered to remove insoluble impurity, it is thus achieved that clear
Clear filtrate；
The filtrate of clarification is sent to decompression distiller and carries out inspissation, eject cooling, knot when solution reaches and all loses the crystallization water
Brilliant, it is thus achieved that anhydrous sodium metasilicate crystal product.
Its chemical equation is:
MgO+2HCl=MgCl2+H2O
SiO2+Na2CO3=Na2SiO3+CO2↑
The invention has the beneficial effects as follows: the waste material of pollution again of boric sludge waste is processed by the present invention, by HCl treatment, raw
Become the hydrate of magnesium chloride, filter, it is thus achieved that silica filter residue, silica filter residue is processed with sodium carbonate, generate metasilicic acid
Sodium water solution, removes insoluble impurity, it is thus achieved that anhydrous sodium metasilicate crystal product, and therefore, for the purity of product being can not
Fastidious, quality also reaches a standard.The waste material of pollution again of boric sludge waste is comprehensively utilized by enterprise, it is thus achieved that anhydrous partial silicon acid
Sodium, turns waste into wealth, and improves the ability of enterprise's deep processing, has the biggest impetus to enterprise development, solid administering chemistry
While body waste material, the requirement of environmental protection can be met, moreover it is possible to create the biggest economic benefit to enterprise, be that chemical industry is combined
Close the model administering and utilizing.
Detailed description of the invention
Embodiment 1, a kind of method preparing the zero inclined silicon of water with useless boron mud filter residue described in the present embodiment, comprise the steps:
Take 500 kilograms of boron mud (silica accounts for 20%, and magnesia accounts for 38%) to react, boron mud steam is heated to 59～
81 degree, maintain 1～2 hour, then dry with centrifuge, it is achieved solid-liquor separation, it is thus achieved that filtrate and filter cake boron mud, filtrate is sent
Go deep processing separately；
Filter cake boron mud (magnesia meter) and hydrochloric acid are reacted in corrosion resistant first reactor with pure mass ratio 1: 1.83, Xu
Xu's stirring issues biochemical reaction, and reaction generates the hydrate of magnesium chloride, and other components generate calcium chloride, the most minimal amount of chlorine
Change manganese, the hydrate of magnesium chloride is filtered, it is thus achieved that the filtrate of clarification and silica filter residue, the filtrate of clarification is sent to and additionally deeply added
Work；
Silica filter residue and sodium carbonate are reacted in the second airtight reactor with pure mass ratio 1: 1.74, in heating, adds
Under conditions of pressure and slowly stirring, reaction generates the sodium metasilicate aqueous solution, is filtered to remove insoluble impurity, it is thus achieved that the filter of clarification
Liquid；
The filtrate of clarification is sent to decompression distiller and carries out inspissation, eject cooling, knot when solution reaches and all loses the crystallization water
Brilliant, it is thus achieved that 200.3 kilograms of anhydrous sodium metasilicate crystal products.
Embodiment 2, a kind of method preparing the zero inclined silicon of water with useless boron mud filter residue described in the present embodiment, comprise the steps:
Take 500 kilograms of boron mud (silica accounts for 20%, and magnesia accounts for 38%) to react, boron mud steam is heated to 59～
81 degree, maintain 1～2 hour, then dry with centrifuge, it is achieved solid-liquor separation, it is thus achieved that filtrate and filter cake boron mud, filtrate is sent
Go deep processing separately；
By filter cake boron mud (magnesia meter) with hydrochloric acid with pure mass ratio 1: 2.04 reacts in corrosion resistant first reactor, Xu
Xu's stirring issues biochemical reaction, and reaction generates the hydrate of magnesium chloride, and other components generate calcium chloride, the most minimal amount of chlorine
Change manganese, the hydrate of magnesium chloride is filtered, it is thus achieved that the filtrate of clarification and silica filter residue, the filtrate of clarification is sent to and additionally deeply added
Work；
Silica filter residue and sodium carbonate are reacted in the second airtight reactor with pure mass ratio 1: 1.95, in heating, adds
Under conditions of pressure and slowly stirring, reaction generates the sodium metasilicate aqueous solution, is filtered to remove insoluble impurity, it is thus achieved that the filter of clarification
Liquid；
The filtrate of clarification is sent to decompression distiller and carries out inspissation, eject cooling, knot when solution reaches and all loses the crystallization water
Brilliant, it is thus achieved that 223.3 kilograms of anhydrous sodium metasilicate crystal products.
Embodiment 3, a kind of method preparing the zero inclined silicon of water with useless boron mud filter residue described in the present embodiment, comprise the steps:
Take 500 kilograms of boron mud (silica accounts for 20%, and magnesia accounts for 38%) to react, boron mud steam is heated to 59～
81 degree, maintain 1～2 hour, then dry with centrifuge, it is achieved solid-liquor separation, it is thus achieved that filtrate and filter cake boron mud, filtrate is sent
Go deep processing separately；
Filter cake boron mud (magnesia meter) and hydrochloric acid are reacted in corrosion resistant first reactor with pure mass ratio 1: 1.62, Xu
Xu's stirring issues biochemical reaction, and reaction generates the hydrate of magnesium chloride, and other components generate calcium chloride, the most minimal amount of chlorine
Change manganese, the hydrate of magnesium chloride is filtered, it is thus achieved that the filtrate of clarification and silica filter residue, the filtrate of clarification is sent to and additionally deeply added
Work；
Silica filter residue and sodium carbonate are reacted in the second airtight reactor with pure mass ratio 1: 1.53, in heating, adds
Under conditions of pressure and slowly stirring, reaction generates the sodium metasilicate aqueous solution, is filtered to remove insoluble impurity, it is thus achieved that the filter of clarification
Liquid；
The filtrate of clarification is sent to decompression distiller and carries out inspissation, eject cooling, knot when solution reaches and all loses the crystallization water
Brilliant, it is thus achieved that 177.2 kilograms of anhydrous sodium metasilicate crystal products.
The above is only three preferred embodiments of the present invention, not for limiting the present invention, and its similar embodiments all, all
The protection domain of patent of the present invention should be covered by.
Claims (1)
1. the method preparing the zero inclined silicon of water with useless boron mud filter residue, is characterized in that comprising the steps: to heat boron mud steam
To 59～81 degree, maintain 1～2 hour, then dry with centrifuge, it is achieved solid-liquor separation, it is thus achieved that filtrate and filter cake boron mud,
Filtrate sends to deep processing separately；Filter cake boron mud and hydrochloric acid are reacted on corrosion resistant first anti-with pure mass ratio 1: 1.62～2.04
Answering in device, issue biochemical reaction in stirring slowly, reaction generates the hydrate of magnesium chloride, and other components generate calcium chloride with few
The manganese chloride of amount, filters the hydrate of magnesium chloride, it is thus achieved that the filtrate of clarification and silica filter residue, the filtrate of clarification is sent to separately
Outer deep processing；Silica filter residue and sodium carbonate are reacted in the second airtight reactor with pure mass ratio 1: 1.53～1.95,
Under conditions of heating, stirring of pressurizeing and blow slowly, reaction generates the sodium metasilicate aqueous solution, is filtered to remove insoluble impurity, obtains
The filtrate that must clarify；The filtrate of clarification is sent to decompression distiller and carries out inspissation, discharge when solution reaches all to lose the crystallization water
Cool down, crystallize, it is thus achieved that anhydrous sodium metasilicate crystal product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477997.XA CN105883832A (en) | 2014-09-10 | 2014-09-10 | Method for preparing anhydrous sodium metasilicate from waste boron mud filter residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477997.XA CN105883832A (en) | 2014-09-10 | 2014-09-10 | Method for preparing anhydrous sodium metasilicate from waste boron mud filter residues |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105883832A true CN105883832A (en) | 2016-08-24 |
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| CN201410477997.XA Pending CN105883832A (en) | 2014-09-10 | 2014-09-10 | Method for preparing anhydrous sodium metasilicate from waste boron mud filter residues |
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2014
- 2014-09-10 CN CN201410477997.XA patent/CN105883832A/en active Pending
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160824 |
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| WD01 | Invention patent application deemed withdrawn after publication |