CN109704530A - A kind of alumina comprehensive utilization of mud method - Google Patents
A kind of alumina comprehensive utilization of mud method Download PDFInfo
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- CN109704530A CN109704530A CN201910164677.1A CN201910164677A CN109704530A CN 109704530 A CN109704530 A CN 109704530A CN 201910164677 A CN201910164677 A CN 201910164677A CN 109704530 A CN109704530 A CN 109704530A
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Abstract
The invention discloses a kind of alumina comprehensive utilization of mud methods, including step 1: aluminium oxidized sludge being crushed to 0.5 millimeter of diameter or less investment acidification kettle, sulfuric acid is continuously added into and maintains 1 >=pH > 0.1 in acidification kettle, the reaction time is more than or equal to 10min；Or be continuously added into sulfuric acid and maintain 1.5 >=pH > 1 in acidification kettle, the reaction time is more than or equal to 30min；Or be continuously added into sulfuric acid and maintain 2.5 >=pH > 1.5 in acidification kettle, the reaction time is more than or equal to 40min；Or be continuously added into sulfuric acid and maintain 3 >=pH > 2.5 in acidification kettle, the reaction time is more than or equal to 50min, and mixed liquor is blown by filters pressing, washing, sky, obtains building gypsum product.It is at low cost using this kind of method processing operation; so that the calcium sulfate prepared meets the national standard of building gypsum, it can be sold directly as product, to improve Treatment of Sludge profit; and the product generated secondary can be utilized, and both protected environment or resource is maximumlly utilized.
Description
Technical field
The present invention relates to environmental protection technical field more particularly to a kind of method of comprehensive utilization of aluminium oxidized sludge.
Background technique
On August 1st, 2016, according to newest " National Hazard waste register " (version in 2016), alumina enterprise was produced
The all qualitative large amount of sewage station processing sludge that journey generates is hazardous waste, the environmental protection pressure and be processed into that one side enterprise faces
This will be significantly increased, on the other hand since the matched numerous alumina enterprises of alumina dangerous waste disposing capacity of region shortage must not
It does not go to other places to find dangerous waste everywhere and receives disposition unit, this also restricts the development of enterprise as country is to illegal disposition dangerous waste
The dangerous waste of the continuous enhancing of hitting dynamics, region alumina industry must carry out legacy specification disposition.
Alumina enterprise wastewater mainly needs three kinds of pollutants of processing, is pH, micro heavy and total P respectively.With environmental protection
It is discharged the raising of total phosphorus index request to sewage plant, lime neutralisation is used in Some Enterprises wastewater treatment, therefore generate
Sludge composition is outer in addition to aluminium hydroxide and other micro heavy hydroxide precipitating, also a large amount of calcium phosphate and calcium sulfate at
Part.
Enterprise uses the commission innoxious landfill stabilization side of qualification unit for the disposition whereabouts of sewage plant sludge substantially at present
Formula, but with the issuing and implementation of new edition dangerous waste register, sewage plant sludge is clearly hazardous waste, the sludge treatment cost of enterprise
It steeply rises, needs to search out new comprehensive utilization disposal options.
With the aggravation of market competition, more and more alumina processing enterprises are faced with homogeneous harmful competition, processing
Gross profit reduces year by year, but artificial, and material and environmental protection treatment cost but increasingly increase.
The patent application of Publication No. CN108393328A discloses a kind of aluminium oxidized sludge and waste acid treatment method, uses
The standard that phosphoric acid calcium product that this kind of method is prepared executes is the standard that enterprise makes by oneself, from the strict sense for, be made
Phosphoric acid calcium product do not meet the national standard or dangerous waste of any Building class product, it is desired nonetheless to entrust qualification mechanism to endanger
Useless disposition, causes alumina Treatment of Sludge cost to increase, profit decline.
Summary of the invention
The present invention is in view of the shortcomings of the prior art, provide a kind of alumina comprehensive utilization of mud method, at this kind of method
It is low to manage operating cost, aluminium oxidized sludge can be most optimally handled, so that the calcium sulfate prepared meets the state of building gypsum
Family's standard, is no longer dangerous waste, can sell directly as product, and to improve Treatment of Sludge profit, and the product generated can
It is secondary to be utilized, it had both protected environment or resource is maximumlly utilized.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of aluminium oxidized sludge is comprehensive
It closes the method for utilizing, including step 1: aluminium oxidized sludge being crushed to 0.5 millimeter of diameter or less investment acidification kettle, is continuously added into sulfuric acid
1 >=pH > 0.1 in acidification kettle is maintained, the reaction time is more than or equal to 10min；Or it is continuously added into sulfuric acid and maintains 1.5 in acidification kettle
>=pH > 1, reaction time are more than or equal to 30min；Or be continuously added into sulfuric acid and maintain 2.5 >=pH > 1.5 in acidification kettle, when reaction
Between be more than or equal to 40min；Or be continuously added into sulfuric acid and maintain 3 >=pH > 2.5 in acidification kettle, the reaction time is more than or equal to 50min,
Mixed liquor is blown by filters pressing, washing, sky, obtains building gypsum product.
In above-mentioned technical proposal, it is preferred that be sampled detection to aluminium oxidized sludge before crushing, detect in sludge
Aluminium hydroxide, calcium phosphate, calcium sulfate and content of beary metal.
In above-mentioned technical proposal, it is preferred that the aluminium oxidized sludge first pass through pulverizer coarse crushing to granular size 5mm with
Under, high-speed dispersing kettle is put into, adds water pre-dispersed, then puts into acid after homogenizing emulsifying pump fining to particle 0.5mm or less
Change in kettle.
In above-mentioned technical proposal, it is preferred that further include step 2: the filtrate that step 1 is generated passes sequentially through resin absorbing column
And complexing kettle, heavy metal ion is complexed to form filter residue dangerous waste and remove through resin adsorption and complexing agent in filtrate, and filtrate, which is transferred to, removes
Phosphorus kettle forms to 8 >=pH >=2.5 and precipitates with alkali in the addition of dephosphorization kettle, aluminum phosphate is obtained by filtration.
In above-mentioned technical proposal, it is preferred that the resin adsorption column material is resin CH-90, and the complexing agent is a huge sum of money
Belong to one or both of trapping agent RS200 or heavy metal chelating agent MT-121.
In above-mentioned technical proposal, it is preferred that the neutralization alkali is one of sodium hydroxide, sodium metaaluminate or aluminium hydroxide
Or it is several.
In above-mentioned technical proposal, it is preferred that further include step 3: aluminum phosphate prepared by step 2 is dissolved in phosphoric acid and obtains phosphoric acid
Aluminum dihydrogen liquid product is concentrated and dried to obtain aluminium dihydrogen phosphate solid.
In above-mentioned technical proposal, it is preferred that further include step 4: the filtrate that step 1 is generated passes sequentially through resin absorbing column
And complexing kettle, heavy metal ion is complexed to form filter residue dangerous waste and remove through resin adsorption and complexing agent in filtrate, and filtrate, which is transferred to, removes
One or both of ferric sulfate or bodied ferric sulfate is added in phosphorus kettle, and alkali neutralization control solution 3 >=pH >=1 is added, when reaction
Between be greater than 0.5 hour, formed precipitating be filtered, washed to obtain ferric phosphate wet product and filtrate.
In above-mentioned technical proposal, it is preferred that further include step 5: the filtrate that step 4 is generated is concentrated to give sulfuric acid aluminium water purifying agent
Product.
In above-mentioned technical proposal, it is preferred that further include step 6: alkali neutralization control solution is added in the filtrate that step 4 is generated
In the range of 9.5 >=pH >=3.5, the reaction time is greater than 0.5 hour, and filters pressing obtains aluminum hydroxide solid, and filtrate crystallisation obtains sulfate
And recycle-water.
Compared with prior art, the present invention have the following beneficial effects: it is at low cost using this kind of method processing operation, can
Aluminium oxidized sludge is most optimally handled, so that the calcium sulfate prepared meets the national standard of building gypsum, it is no longer dangerous waste,
It can be sold directly as product, to improve Treatment of Sludge profit, and the product generated secondary can be utilized, and both be protected
Resource is also maximumlly utilized in environment.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawings of the specification: a kind of aluminaization is dirty
Mud method of comprehensive utilization, referring to the flow diagram of Fig. 1, including following embodiment and comparative example.
In each embodiment, aluminium oxidized sludge raw material standard used meets the quality control standard of execution:
The aluminium oxidized sludge 2000g for meeting above-mentioned quality control standard is taken, uniform stirring detects the hydroxide in sludge
Aluminium, calcium phosphate, calcium sulfate and content of beary metal, composition table are as follows:
Comparative example 1: taking the above-mentioned sludge of 100g to be dissolved in the mashing dispersion of 300g water, is continuously added into sulfuric acid acidification dissolution, control volume
System reaction 1.5 >=pH > 1, react 30min, through being filtered, washed to obtain building gypsum product, to building gypsum product obtained at
Part is detected, and detection composition table is as follows:
Comparative example 2: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 4 >=pH >=3.5, reacts 1h, through being filtered, washed to obtain building gypsum product,
Building gypsum product composition obtained is detected, detection composition table is as follows:
Embodiment 1: embodiment: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, investment
To high-speed dispersing kettle, add water 300g pre-dispersed, then puts into acidification after emulsifying stirring fining to particle 0.5mm or less
In kettle, it is continuously added into sulfuric acid acidification dissolution, control system reacts 1 >=pH > 0.1, reacts 10min, built through being filtered, washed
Build gypsum product；Appropriate heavy metal chelating agent RS200, mistake after complexing trapping is added after impregnating absorption using resin CH-90 in filtrate
Filter, filter residue is dangerous waste.It takes 100g filtrate and sodium hydroxide is added wherein and neutralize to 8 >=pH >=2.5, filter to obtain aluminum phosphate, examine
Aluminium and phosphorus content in the phosphoric acid are surveyed, according to aluminium phosphorus than phosphoric acid and water for adjusting concentration is added, dissolves and aluminium dihydrogen phosphate is made
Liquid.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Aluminum phosphate composition obtained is detected, detection composition table is as follows:
Aluminium dihydrogen phosphate composition obtained is detected, detection composition table is as follows:
Embodiment 2: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 1.5 >=pH > 1, reacts 30min, is filtered, washed to obtain building gypsum production
Product；Appropriate heavy metal chelating agent RS200 is added after impregnating absorption using resin CH-90 in filtrate, filters after complexing trapping, filter residue is
Dangerous waste.It takes 100g filtrate and sodium hydroxide is added wherein and neutralize to 8 >=pH >=2.5, filter to obtain aluminum phosphate, detect in the phosphoric acid
Aluminium and phosphorus content dissolve and aluminium dihydrogen phosphate liquid are made according to aluminium phosphorus than phosphoric acid and water for adjusting concentration is added.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Aluminum phosphate composition obtained is detected, detection composition table is as follows:
Aluminium dihydrogen phosphate composition obtained is detected, detection composition table is as follows:
Embodiment 3: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 2.5 >=pH > 1.5,40min is reacted, through being filtered, washed to obtain building gypsum
Product；Appropriate heavy metal chelating agent MT-121 is added after impregnating absorption using resin CH-90 in filtrate, filters, filters after complexing trapping
Slag is dangerous waste.It takes 100g filtrate and sodium metaaluminate is added wherein and neutralize to 8 >=pH >=2.5, filter to obtain aluminum phosphate, detect the phosphorus
Aluminium and phosphorus content in acid dissolve and aluminium dihydrogen phosphate liquid are made according to aluminium phosphorus than phosphoric acid and water for adjusting concentration is added.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Aluminum phosphate composition obtained is detected, detection composition table is as follows:
Aluminium dihydrogen phosphate composition obtained is detected, detection composition table is as follows:
Embodiment 4: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 3 >=pH > 2.5, reacts 50min, is filtered, washed to obtain building gypsum production
Product；Appropriate heavy metal chelating agent MT-121 is added after impregnating absorption using resin CH-90 in filtrate, filters after complexing trapping, filter residue
For dangerous waste.It takes 100g filtrate and 5g ferric sulfate is added wherein, while controlling solution 3 >=pH >=1, reaction time with sodium metaaluminate
0.5 hour, it is filtered, washed to obtain ferric phosphate wet product, filtrate is concentrated by evaporation, and obtains aluminum sulfate solution, which can be used as
Water purification agent.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Ferric phosphate composition obtained is detected, detection composition table is as follows:
Sulfuric acid aluminium water purifying agent solution compolision obtained is detected, detection composition table is as follows:
Embodiment 5: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 3 >=pH > 2.5, reacts 50min, is filtered, washed to obtain building gypsum production
Product；Appropriate heavy metal chelating agent MT-121 is added after impregnating absorption using resin CH-90 in filtrate, filters after complexing trapping, filter residue
For dangerous waste.It takes 100g filtrate and 6.25g bodied ferric sulfate is added wherein, while controlling solution 3 >=pH >=1 with sodium metaaluminate,
Reaction time is greater than 2 hours, is filtered, washed to obtain ferric phosphate wet product, and filtrate is concentrated by evaporation, and obtains aluminum sulfate solution, the aluminum sulfate
Solution can be used as water purification agent.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Ferric phosphate composition obtained is detected, detection composition table is as follows:
Sulfuric acid aluminium water purifying agent solution compolision obtained is detected, detection composition table is as follows:
Embodiment 6: taking the above-mentioned sludge of 100g to first pass through pulverizer coarse crushing to granular size 5mm hereinafter, putting into high speed
Scattered Kettle adds water 300g pre-dispersed, then puts into acidification kettle after homogenizing emulsifying pump fining to particle 0.5mm or less, holds
Continuous that sulfuric acid acidification dissolution is added, control system reacts 3 >=pH > 2.5, reacts 50min, is filtered, washed to obtain building gypsum production
Product；Appropriate heavy metal chelating agent MT-121 is added after impregnating absorption using resin CH-90 in filtrate, filters after complexing trapping, filter residue
For dangerous waste.Taking three parts of every part of quality is the filtrate of 100g, and 6.25g bodied ferric sulfate is added in first part of 100g filtrate wherein, together
When with sodium metaaluminate control solution 3 >=pH >=1, react 3 hours, be filtered, washed to obtain ferric phosphate wet product, hydrogen-oxygen be added in filtrate
Change sodium to neutralize to 5 >=pH >=3.5, react 2 hours, filter to obtain aluminium hydroxide wet product, filtrate evaporation precipitates crystal, and obtains sodium sulphate；
6.25g bodied ferric sulfate is added in second part of 100g filtrate wherein, while controlling solution 3 >=pH >=1, reaction 2 with sodium metaaluminate
Hour, it is filtered, washed to obtain ferric phosphate wet product, sodium hydroxide is added in filtrate and neutralizes to 6.5 >=pH >=5.5, reacts 1 hour,
Aluminium hydroxide wet product is filtered to obtain, filtrate evaporation precipitates crystal, and obtains sodium sulphate.It is poly- that 6.25g is added in third part 100g filtrate wherein
Ferric sulfate is closed, while controlling solution 3 >=pH >=1 with sodium metaaluminate, reacts 3 hours, is filtered, washed to obtain ferric phosphate wet product, filter
Sodium hydroxide is added in liquid to neutralize to 9.5 >=pH >=7, reacts 0.5 hour, filters to obtain aluminium hydroxide wet product, filtrate evaporation is precipitated
Crystal obtains sodium sulphate.
Building gypsum product composition obtained is detected, detection composition table is as follows:
Ferric phosphate composition made from first part of filtrate is detected, detection composition table is as follows:
Aluminium hydroxide composition made from first part of filtrate is detected, detection composition table is as follows:
Sodium sulphate composition made from first part of filtrate is detected, detection composition table is as follows:
Ferric phosphate composition made from second part of filtrate is detected, detection composition table is as follows:
Aluminium hydroxide composition made from second part of filtrate is detected, detection composition table is as follows:
Sodium sulphate composition made from second part of filtrate is detected, detection composition table is as follows:
Ferric phosphate composition made from third part filtrate is detected, detection composition table is as follows:
Aluminium hydroxide composition made from third part filtrate is detected, detection composition table is as follows:
Sodium sulphate composition made from third part filtrate is detected, detection composition table is as follows:
Above-mentioned each comparative example and embodiment are compareed with the quality standard for preparing product, specific quality standard is as follows:
In each embodiment, obtained gypsum product is the aqueous wet solid of technical grade, is mainly used for building material industry, product need to meet execution
Quality standard:
In each embodiment, obtained aluminum phosphate is mainly one kind or more of aluminum phosphate, one hydrogen aluminium of phosphoric acid or aluminium dihydrogen phosphate
Kind mixture, is the aqueous wet solid of technical grade, is mainly used for building material industry and refractories industry, meets the quality mark that need to be executed
It is quasi-:
In each embodiment, obtained aluminium dihydrogen phosphate, product is technical grade, is mainly used for building material industry and refractory material row
Industry meets the quality standard that need to be executed:
In each embodiment, obtained ferric phosphate meets for the aqueous wet solid of technical grade mainly for the manufacture of battery material
The quality standard that need to be executed:
In each embodiment, obtained sulfuric acid aluminium water purifying agent is mainly used for Treatment of Industrial Water, and product need to meet the quality of execution
Standard:
In each embodiment, obtained aluminum hydroxide product be technical grade gel solids shape, be mainly used for industrial building materials and resistance to
Fiery materials industry, product need to meet the quality standard of execution:
In each embodiment, obtained sodium sulphate, product is technical grade granular solid-like, is mainly used for glass, printing and dyeing etc. and adds
Add agent and Nacl raw material, product need to meet the quality standard of execution:
By comparison it is found that the building gypsum sulfate hemihydrate calcium content prepared in comparative example 1 and comparative example 2 is lower than 60%,
The national standard for not meeting building gypsum, still falls within dangerous waste, it is desired nonetheless to qualification mechanism be entrusted to carry out dangerous waste disposition.And embodiment
1 building gypsum, aluminum phosphate, aluminium dihydrogen phosphate, ferric phosphate, sulfuric acid aluminium water purifying agent, aluminium hydroxide and the sulfuric acid prepared to embodiment 6
Sodium meets relevant national standard and company standard, maximizes and promotes secondary use rate, improves under the premise of waste processing
Economic benefit.
The present invention is directed to the comprehensive utilization of aluminium oxidized sludge, pH mainly different by pretreatment to sludge and adjustment
Reaction condition and removal of heavy metal ions technology is taken, so that the various ingredient for having utility value such as calcium sulfate, phosphorus in sludge
Sour aluminium, the products such as aluminium hydroxide are successively precipitated out, and obtain building gypsum, aluminum phosphate, phosphoric acid by preparation and separating-purifying
Aluminum dihydrogen, ferric phosphate, sulfuric acid aluminium water purifying agent, aluminium hydroxide and sodium sulphate product.
Key reaction equation involved in the present invention is as follows:
2Al(OH)3+3H2SO4→Al2(SO4)3+6H2O
AlPO4+2H3PO4→Al(H2PO4)3
Al2(SO4)3+6NaOH→2Al(OH)3+3Na2SO4
Ca3(PO4)2+3H2SO4→3CaSO4+2H3PO4
Ni(OH)2+H2SO4→NiSO4+2H2O
Brief description of the process:
Firstly, the aluminium oxidized sludge of detection recycling, predominantly detects aluminium hydroxide in sludge, calcium phosphate, calcium sulfate and a huge sum of money
Belong to content, proposes basic data for subsequent comprehensive utilization.
Then, sludge is put into high-speed dispersing kettle after coarse crushing, investment acidification kettle, addition after refining again after dispersion
Sulfuric acid is dissolved, it will be understood by those skilled in the art that: sulfuric acid can be using the spent acid substitution containing sulfuric acid, the spent acid
It is the spent acid that Treatment of Metal Surface generates, is then filtered, washed and sky is blown, obtain semi-moist gypsum product, filtrate is through setting
Heavy metal complexing trapping is carried out after rouge absorption, it is dangerous waste, commission qualification unit disposition, filtrate entrance that gained waste residue is filtered after processing
Dephosphorization reaction kettle；Removing heavy metals filtrate a part passes through alkali neutralization, filters to obtain aluminum phosphate mixing product, and aluminum phosphate is dissolved in phosphorus
Acid and water simultaneously adjust content, and aluminium dihydrogen phosphate liquid product can be obtained, wherein the phosphoric acid being added is 60%~85% industrial phosphoric acid,
Aluminium dihydrogen phosphate solid product can be obtained by being further concentrated and dried, and multiple-effect or MVR concentration can be used in concentration.
Sulphate of iron reaction is added in removing heavy metals filtrate another part, filters to obtain phosphoric acid iron product；Gained filtrate a part
It is concentrated to be used as sulfuric acid aluminium water purifying agent.Another part through alkali neutralization, aluminum hydroxide product is obtained by filtration.
Solid sodium sulfate product is precipitated by crystallization through alkali neutralization and the filtrate being obtained by filtration, crystallization precipitation mode can be used
Evaporative crystallization or freezing and crystallizing etc..
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of alumina comprehensive utilization of mud method, it is characterised in that: including step 1: aluminium oxidized sludge is crushed to diameter
0.5 millimeter or less investment is acidified kettle, is continuously added into sulfuric acid and maintains 1 >=pH > 0.1 in acidification kettle, the reaction time is more than or equal to
10min；Or be continuously added into sulfuric acid and maintain 1.5 >=pH > 1 in acidification kettle, the reaction time is more than or equal to 30min；Or persistently add
Enter sulfuric acid and maintain 2.5 >=pH > 1.5 in acidification kettle, the reaction time is more than or equal to 40min；Or it is continuously added into sulfuric acid and maintains acidification
3 >=pH > 2.5 in kettle, reaction time are more than or equal to 50min, and mixed liquor is blown by filters pressing, washing, sky, obtains building gypsum
Product.
2. a kind of alumina comprehensive utilization of mud method as described in claim 1, it is characterised in that: to alumina before crushing
Change sludge and be sampled detection, detects aluminium hydroxide, calcium phosphate, calcium sulfate and content of beary metal in sludge.
3. a kind of alumina comprehensive utilization of mud method as described in claim 1, it is characterised in that: the aluminium oxidized sludge is first
By pulverizer coarse crushing to granular size 5mm hereinafter, put into high-speed dispersing kettle, add water pre-dispersed, then through homogenizing emulsifying pump
It is put into acidification kettle after refining particle 0.5mm or less.
4. a kind of alumina comprehensive utilization of mud method as described in claim 1, it is characterised in that: further include step 2: will walk
Rapid 1 filtrate generated passes sequentially through resin absorbing column and complexing kettle, and heavy metal ion is through resin adsorption and complexing agent network in filtrate
Conjunction forms filter residue dangerous waste and removes, and filtrate is transferred to dephosphorization kettle, is formed and is precipitated to 8 >=pH >=2.5 with alkali in the addition of dephosphorization kettle, mistake
Filter obtains aluminum phosphate.
5. a kind of alumina comprehensive utilization of mud method as claimed in claim 4, it is characterised in that: the resin absorbing column material
Material is resin CH-90, and the complexing agent is one of heavy metal chelating agent RS200 or heavy metal chelating agent MT-121 or two
Kind.
6. a kind of alumina comprehensive utilization of mud method as claimed in claim 4, it is characterised in that: the neutralization alkali is hydrogen-oxygen
Change one or more of sodium, sodium metaaluminate or aluminium hydroxide.
7. a kind of alumina comprehensive utilization of mud method as claimed in claim 4, it is characterised in that: further include step 3: will walk
The aluminum phosphate of rapid 2 preparation is dissolved in phosphoric acid and obtains aluminium dihydrogen phosphate liquid product, is concentrated and dried to obtain aluminium dihydrogen phosphate solid.
8. a kind of alumina comprehensive utilization of mud method as claimed in claim 2, it is characterised in that: further include step 4: will walk
Rapid 1 filtrate generated passes sequentially through resin absorbing column and complexing kettle, and heavy metal ion is through resin adsorption and complexing agent network in filtrate
Conjunction forms filter residue dangerous waste and removes, and filtrate is transferred to dephosphorization kettle, one or both of ferric sulfate or bodied ferric sulfate is added, and add
Enter alkali neutralization control solution 3 >=pH >=1, the reaction time is greater than 0.5 hour, forms precipitating and is filtered, washed to obtain ferric phosphate wet product
And filtrate.
9. a kind of alumina comprehensive utilization of mud method as claimed in claim 8, it is characterised in that: further include step 5: will walk
Rapid 4 filtrates generated are concentrated to give sulfuric acid aluminium water purifying agent product.
10. a kind of alumina comprehensive utilization of mud method as claimed in claim 8, it is characterised in that: further include step 6: will
The filtrate that step 4 generates is added in the alkali neutralization control range of 9.5 >=pH of solution >=3.5, and the reaction time is greater than 0.5 hour, filters pressing
Aluminum hydroxide solid is obtained, filtrate crystallisation obtains sulfate and recycle-water.
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| 房鼎业等: "《大学工科专业概论》", 30 March 2008, 华东理工大学出版社 * |
| 谷鸣: "《乳品工程师使用技术手册》", 31 January 2009, 北京轻工业出版社 * |
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