CN102161495A - Method for recycling soda waste mud from soda plant - Google Patents
Method for recycling soda waste mud from soda plant Download PDFInfo
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- CN102161495A CN102161495A CN 201110047658 CN201110047658A CN102161495A CN 102161495 A CN102161495 A CN 102161495A CN 201110047658 CN201110047658 CN 201110047658 CN 201110047658 A CN201110047658 A CN 201110047658A CN 102161495 A CN102161495 A CN 102161495A
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Abstract
The invention discloses a method for recycling soda waste mud from a soda plant. The method comprises the following steps of: drying, grinding and washing the soda waste mud generated in the production process of an ammonium alkali technology, adding an aid, washing and performing suction-filtration; and adding an aid into the soda waste mud obtained after the filtration, and washing and drying again so as to change the soda waste mud into precipitated calcium carbonate. By the method, the content of calcium carbonate can reach 97 percent, the whiteness value can reach 90 percent, the requirements of general precipitated calcium carbonate products can be met, and corresponding chemical products can be prepared and can be further purified and treated to form products with higher requirements; and the process flow is short, the method is convenient to operate, production equipment has low investment, no pollution and no discharge in production environment and comprehensive utilization of solid wastes can be realized, and the economic benefit and environment benefit can be achieved.
Description
Technical field
The invention belongs to trade waste processing, resource technology field, be specifically related to a kind of method of recycling white alkali-making mud from alkali works.
Background technology
The soda industry of China adopts the solvay soda process production technique substantially.Solvay soda process produce washing beck is discharged in distillation process is discharged in the soda ash process a large amount of slopss and the salt refining operation salt slurry waste liquid again in the kiln gas charing and the white depositions of back generation be alkaline residue, be commonly called as white alkali-making mud.The white clay main component is CaCO
3, because of it has residual alkali,, efflux and can cause environmental pollution so belong to secondary pollutant, can not directly recycle.White clay has following principal feature:
1, insoluble main component is CaCO in the white alkali-making mud
3, Mg (OH)
2, CaSO
4And Ca (OH)
2(also contain a spot of Al
2O
3, SiO
2And Fe
2O
3Deng), content is 60%～80%; And easily the salt main component of capacitive is CaCl
2, NaCl etc., content is 12%～22%; In addition, also contain 6%～10% acid non-soluble substance.Lime carbonate, calcium sulfate, calcium oxide content height in the white clay, insolubles total amount height.
2, soluble chloride (CaCl in the white clay
2, NaCl) salt content is higher, promptly chloride ion content is higher.Thus, white clay is very limited in the utilization of industrial utilization again, particularly building material industry.
3, particle is very tiny, is another principal character of white clay.The fine size of white clay, specific surface area is big, has colloidal property.Therefore, its powder granule settling velocity is slow, and the water content height, is difficult to dehydration, and this is the difficult point that white clay is administered.
4, white clay belongs to the high alkalinity material, and its pH value is generally 10～12.Any stacking of white clay easily makes wherein objectionable constituent (particularly alkali composition) through the erosion of weathering leaching, rainwash and the water and soil earth that permeates the ground, polluted-water and soil.Therefore,, can kill the microorganism in the soil, make soil forfeiture decomposition ability when objectionable constituent such as alkali matter enter soil; Destroy the original structure of soil simultaneously, develop into the saltings at last.
Because the white clay amount is big and because of self characteristics intractable, a large amount of white claies are stacked naturally, perhaps directly arrange extra large.The long-term white clay of stacking has taken a large amount of land resources, and its surperficial weathering produces dust pollution; White clay row Hai Ze causes the marine ecology balance destroyed, harm aquaculture, and also might jeopardize the navigation channel after the deposition.Therefore, the pollution problem of white clay is restricting further developing of soda ash enterprise always, is a big technical barrier of ammonia alkali factory.
The treatment process of white clay mainly contains WATER-WASHING METHOD and chemical method at present.To be exactly white clay that caustic room is discharged through operations such as several washing, carbonating and filtrations remove behind wherein residual alkali, excessive CaO and the most of impurity realizing WATER-WASHING METHOD recycles.Because of the CaCO3 of its recovery exists that particle agglomeration, quality are looser, fineness and the not high problem of whiteness, regular meeting dry linting occurs, falls a mao phenomenon in printing process, is difficult to satisfy present print request.Chemical method because need dose chemical assistant, parameter is restive and cost is higher and seldom adopt.
Document " brief talking the utilization of alkali recovery white slime " (Shen Xingnan, " Zhejiang papermaking " the 3rd phase in 1999) and document " alkali recovery white slime prepares lightweight carbonic acid " (Li Zhongming, " Chinese environmental protection industry " 2006) introduce respectively from white clay extract the method for lime carbonate, the report white clay is through washing to remove remaining solubility NaOH in the document " brief talking the utilization of alkali recovery white slime ", Na2S, again through screening to remove or to reduce dust impurity; Feed CO2 gas at last excessive effective CaO is converted into lime carbonate, but this method is not carried out the processing of essence to the white clay whiteness, this method is unsatisfactory to improving whiteness value raising effect, and then limits its time utilization.Document " alkali recovery white slime prepares lightweight carbonic acid " report is by purification processes that the filtrate before digesting is flocculated, avoid software impurity such as the charcoal end in the green liquor, assorted soil, silica gel and Fe, Mn ion to enter digestion, causticization system, to improve the whiteness and the purity of white clay.And the special-purpose sand mill of exploitation white clay carries out directional grinding to white clay, and to separate wadding regular, makes its fineness and microtexture satisfy the needs of papermaking filler, and directional grinding can screen out hardware impurity such as sand, coke again simultaneously.Concrete steps are: green liquor is purified, stable, directional grinding is brightened, cleans in digestion and drying.This method is handled Fe, Mn plasma, but the calcium ion in the white clay is not reclaimed, and a large amount of calcium ions is run off, and not only pollutes, and influences calcium carbonate content.More than two methods be saved as highly, complex process causes secondary pollution problems, is not the Perfected process that reclaims white alkali-making mud.
Summary of the invention
The objective of the invention is deficiency at existing technology existence, proposed a kind of method from alkali works's recycling white alkali-making mud, this method not only technology is simple, reasonable, and cost is low, resource recycling rate high benefit is good, realizes the recycling and the environmental friendliness of solid waste.
The present invention realizes from following technical scheme:
A kind of method of recycling white alkali-making mud from alkali works comprises with step:
The white alkali-making mud that the ammonia alkali art production process is produced carries out adding first auxiliary agent after drying, grinding, the washing, washes suction filtration then; The white alkali-making mud of gained adds second auxiliary agent after filtration, and then washing and drying once, thereby realizes white alkali-making mud is converted into precipitated chalk.
Dry: as to be meant white clay is put into 105
oIn the C baking oven, dry 5～6 hours.
Washing: be meant dried white clay is mixed with certain water yield, and stir and make the white clay suspension liquid.
Suction filtration: be meant how suspension liquid is carried out suction filtration with vacuum pump with circulating.
First auxiliary agent: be meant in white suspension liquid to add a certain amount of anhydrous sodium carbonate,, improve calcium carbonate content to reclaim calcium ion.
Second auxiliary agent: be meant in white suspension liquid to add a certain amount of no vat powder,, improve whiteness to remove Fe, Mn plasma.
The concrete steps of the inventive method are as follows:
(1) gets the 2g white alkali-making mud in 105
oIn the C baking oven, after dry 5～6 hours, take out and grind;
(2) add 130ml water thorough mixing after the grinding, stir into the white clay suspension liquid, the white clay suspension liquid is carried out suction filtration;
(3) with white alkali-making mud behind the suction filtration and 130ml water thorough mixing, and suction filtration behind the adding 0.5g anhydrous sodium carbonate thorough mixing;
(4) with white alkali-making mud behind the suction filtration and 130ml water thorough mixing, and suction filtration behind the adding 0.3g vat powder thorough mixing;
(5) white alkali-making mud behind the suction filtration is placed 105
oIn the C baking oven, dry 5～6 hours.
The invention has the beneficial effects as follows: utilize aforesaid method to reclaim white alkali-making mud, can realize calcium carbonate product whiteness value 〉=90%, calcium carbonate content 〉=97%, products obtained therefrom can directly be produced corresponding Chemicals or the higher product of purity.Utilize above-mentioned recovery and treatment method, technical process is simple, and is easy to operate, and small investment of production equipment can realize the white clay comprehensive utilization of resources, improves the cleaner production level of alkali factory, realizes economic benefit and environmental benefit.
System of selection principle of the present invention:
Dry: as to be meant removal with the partial impurities in the white clay.
Washing: be meant contained solvability ion-transfer in the white clay in water.
Suction filtration: be meant and realize lime carbonate and other solvability ion isolation.
First auxiliary agent: be meant to add a certain amount of anhydrous sodium carbonate,, improve calcium carbonate content with the calcium ion reaction.
Second auxiliary agent: the material that influences whiteness in the white clay mainly is ferrous metal such as iron, manganese, and they exist with Fe, Mn ion and oxide form.The chemical method removal of impurities is an example with the deironing, utilizes chemical reducing agent that ferric ion is reduced into the ferrous ion of solubility, can remove by washing, to reach the purpose that brightens again.Vat powder (NaS
2O
4) as chemical reducing agent, itself and ferric reaction equation are:
6Fe
3+﹢S
2O
4 2-﹢4H
2O＝6Fe
2+﹢2SO
4 2-﹢8H
+。
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Embodiment
Below in conjunction with example the present invention is described in further detail:
Embodiment:
Get the white clay that certain alkali works's production technique produces, from white clay, reclaim lime carbonate according to the following steps:
1. get the 2g white clay and place beaker, in 105
oIn the C baking oven, after dry 5～6 hours, take out and grind.
2. add 130ml water thorough mixing after grinding, stir into suspension liquid, suspension liquid is carried out suction filtration.
3. with white clay behind the suction filtration and 130ml water thorough mixing, and add suction filtration behind the 0.5g anhydrous sodium carbonate thorough mixing.
4. with white clay behind the suction filtration and 130ml water thorough mixing, and add suction filtration behind the 0.3g vat powder thorough mixing.
5. the white clay behind the suction filtration is placed beaker, in 105
oIn the C baking oven, dry 5～6 hours.
Through check, can reach 91.2% with aforesaid method purification lime carbonate whiteness value, calcium carbonate content can reach 97.3%, meets the requirement of calcium carbonate product, can make multiple calcium carbonate product with this product as raw material, as:
1, high-grade cigarette paper calcium carbonate for special use.The amount of filling proportioning of lime carbonate in cigarette tissue production is the 40-50% of fibrous material, can effectively improve the Gas permeability of cigarette tissue.
2, the application of precipitated chalk in rubber, plastics, paper, coating.Can increase the rubber volume, reduce product cost, improve the processing characteristics of rubber.Can increase the plastics volume, reduce product cost; Improve the dimensional stability of plastics.Make the filler of paper, in paper, add an amount of lime carbonate, can guarantee that paper has certain intensity and whiteness, reduces cost simultaneously.In coating, lime carbonate plays skeleton function, so in coatings industry, lime carbonate is called as pigment extender as filler.
3, precipitated chalk has many application at aspects such as medicine, food, feed, toothpaste, makeup, printing ink.
Claims (4)
1. method of recycling white alkali-making mud from alkali works is characterized in that comprising with step:
The white alkali-making mud that the ammonia alkali art production process is produced carries out adding first auxiliary agent after drying, grinding, the washing, washes suction filtration then; The white alkali-making mud of gained adds second auxiliary agent after filtration, and then washing and drying once, thereby realizes white alkali-making mud is converted into precipitated chalk.
2. the method for recycling white alkali-making mud according to claim 1 is characterized in that concrete steps are as follows:
(1) gets the 2g white alkali-making mud in the 105oC baking oven, after dry 5～6 hours, take out and grind;
(2) add 130ml water thorough mixing after the grinding, stir into the white clay suspension liquid, the white clay suspension liquid is carried out suction filtration;
(3) with white alkali-making mud behind the suction filtration and 130ml water thorough mixing, and suction filtration behind the adding 0.5g anhydrous sodium carbonate thorough mixing;
(4) with white alkali-making mud behind the suction filtration and 130ml water thorough mixing, and suction filtration behind the adding 0.3g vat powder thorough mixing;
(5) white alkali-making mud behind the suction filtration is placed the 105oC baking oven, dry 5～6 hours.
3. the method for recycling white alkali-making mud according to claim 1 is characterized in that: above-mentioned
Washing is meant the dried white clay and the water yield, and stirs and make the white clay suspension liquid.
4. the method for recycling white alkali-making mud according to claim 1 and 2 is characterized in that: above-mentioned suction filtration is meant how suspension liquid is carried out suction filtration with vacuum pump with circulating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110047658 CN102161495A (en) | 2011-02-28 | 2011-02-28 | Method for recycling soda waste mud from soda plant |
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|---|---|---|---|
| CN 201110047658 CN102161495A (en) | 2011-02-28 | 2011-02-28 | Method for recycling soda waste mud from soda plant |
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| CN102161495A true CN102161495A (en) | 2011-08-24 |
Family
ID=44462997
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| CN 201110047658 Pending CN102161495A (en) | 2011-02-28 | 2011-02-28 | Method for recycling soda waste mud from soda plant |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718373A (en) * | 2011-11-01 | 2012-10-10 | 山东大学 | Method for treating white mud produced by papermaking and use of the white mud treated by the method in removal of CO2 in tail flue gas from coal-fired boiler |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN108101089A (en) * | 2017-12-25 | 2018-06-01 | 绵阳市荣坤科技有限公司 | A kind of method that high-quality calcium carbonate albarium is prepared using paper white sludge |
| CN108793215A (en) * | 2018-05-30 | 2018-11-13 | 福建鼎盛元环保科技有限公司 | A kind of production technology producing whiting using pulping and paper-making white clay |
| CN111215430A (en) * | 2019-12-31 | 2020-06-02 | 河北中科同创科技发展有限公司 | Alkaline residue utilization method for separating calcium and magnesium by phase transfer method |
| CN112961436A (en) * | 2021-03-03 | 2021-06-15 | 海南蓝岛环保产业股份有限公司 | Plastic product and preparation method thereof |
| CN115594862A (en) * | 2022-08-26 | 2023-01-13 | 关祥瑞（Cn） | Method and equipment for preparing humic acid calcium magnesium chelating liquid by using ammonia-soda alkaline residue |
| CN116375072A (en) * | 2023-04-11 | 2023-07-04 | 重庆碳福森环保科技有限公司 | Method for producing modified calcium carbonate by aid method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376611A (en) * | 2008-09-28 | 2009-03-04 | 华南理工大学 | Method for producing compound fertilizer by calcining combination of soda waste mud and potassium ore |
| CN101880179A (en) * | 2010-05-28 | 2010-11-10 | 华南理工大学 | Method for preparing potash fertilizer and building material products from white alkali-making mud |
-
2011
- 2011-02-28 CN CN 201110047658 patent/CN102161495A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376611A (en) * | 2008-09-28 | 2009-03-04 | 华南理工大学 | Method for producing compound fertilizer by calcining combination of soda waste mud and potassium ore |
| CN101880179A (en) * | 2010-05-28 | 2010-11-10 | 华南理工大学 | Method for preparing potash fertilizer and building material products from white alkali-making mud |
Non-Patent Citations (1)
| Title |
|---|
| 《广东工业大学硕士学位论文》 20100913 张倍维 利用制碱白泥生产沉淀碳酸钙的研究 第1，18，19，27，33页 1-4 , * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718373A (en) * | 2011-11-01 | 2012-10-10 | 山东大学 | Method for treating white mud produced by papermaking and use of the white mud treated by the method in removal of CO2 in tail flue gas from coal-fired boiler |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN108101089A (en) * | 2017-12-25 | 2018-06-01 | 绵阳市荣坤科技有限公司 | A kind of method that high-quality calcium carbonate albarium is prepared using paper white sludge |
| CN108793215A (en) * | 2018-05-30 | 2018-11-13 | 福建鼎盛元环保科技有限公司 | A kind of production technology producing whiting using pulping and paper-making white clay |
| CN111215430A (en) * | 2019-12-31 | 2020-06-02 | 河北中科同创科技发展有限公司 | Alkaline residue utilization method for separating calcium and magnesium by phase transfer method |
| CN112961436A (en) * | 2021-03-03 | 2021-06-15 | 海南蓝岛环保产业股份有限公司 | Plastic product and preparation method thereof |
| CN112961436B (en) * | 2021-03-03 | 2023-04-07 | 海南蓝岛环保产业股份有限公司 | Plastic product and preparation method thereof |
| CN115594862A (en) * | 2022-08-26 | 2023-01-13 | 关祥瑞（Cn） | Method and equipment for preparing humic acid calcium magnesium chelating liquid by using ammonia-soda alkaline residue |
| CN115594862B (en) * | 2022-08-26 | 2024-05-28 | 关祥瑞 | Method and equipment for preparing calcium magnesium humate chelating liquid from ammonia alkali alkaline residues |
| CN116375072A (en) * | 2023-04-11 | 2023-07-04 | 重庆碳福森环保科技有限公司 | Method for producing modified calcium carbonate by aid method |
| CN116375072B (en) * | 2023-04-11 | 2024-02-27 | 重庆碳福森环保科技有限公司 | Method for producing modified calcium carbonate by aid method |
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Application publication date: 20110824 |