CN102502679B - Method for effectively reducing chemical oxygen demand (COD) of agricultural kaolin - Google Patents
Method for effectively reducing chemical oxygen demand (COD) of agricultural kaolin Download PDFInfo
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- CN102502679B CN102502679B CN 201110371546 CN201110371546A CN102502679B CN 102502679 B CN102502679 B CN 102502679B CN 201110371546 CN201110371546 CN 201110371546 CN 201110371546 A CN201110371546 A CN 201110371546A CN 102502679 B CN102502679 B CN 102502679B
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Abstract
The invention belongs to the field of environment technology and particularly relates to a method for effectively reducing the chemical oxygen demand (COD) of agricultural kaolin. The method for effectively reducing the COD of agricultural kaolin is characterized by comprising the following steps that: 1), kaolin, calcium hypochlorite and sodium peroxide according to a mass ratio of 100:(1-2):(1-5) are put into a mixing machine to be sealed, stirred and mixed to obtain a uniform powder mixture; 2), water is sprayed into the powder mixture according to a mass ratio of the powder mixture to the water to be 100:(8-12), the fast stirring and mixing is carried out for 20 to 30 minutes so that the powder mixture and the water are subjected to full reaction, and samples after mixing reaction are obtained; and 3) the samples after the mixing reaction are taken out for packaging, and kaolin (products) for fertilizer carriers is obtained. The method effectively reduces the COD in the agricultural kaolin.
Description
Technical field
The invention belongs to the environmental technology field, be specifically related to the method for a kind of effective reduction kaolin COD.
Background technology
Chemical oxygen demand COD (Chemical Oxygen Demand) refers under certain strict condition, and the reducing substances in the water is under the effect of the strong oxidizer that adds, and the quantity of the oxygenant that consumes during oxidized the decomposition is represented with the mg/L of oxygen.Chemical oxygen demand (COD) has reflected the degree that polluted by reducing substances, these materials comprise organism, nitrite, ferrous salt, sulfide etc., but the quantity of inorganic reduction material is little relatively in general water and the waste water, and be very general by Organic pollutants, therefore, COD can be used as a composite target of organic substance relative content.
Kaolin is the carrier of chemical fertilizer and agricultural chemicals, plays the effect of protection soil.But, require kaolinic COD value (COD≤1000mg/L) within the scope of regulation, and kaolinic COD value such as coal measures is too high, can not directly apply to the carrier of chemical fertilizer in the agricultural, agricultural chemicals, kaolinic application and outlet have been influenced, so how low cost reduces kaolin COD value down, becomes current problem demanding prompt solution.
The method that reduces COD at present has a lot, 97112932.0), " a kind of method of rapidly reducing COD value of waste water " (application number: 200710170862.9), " a kind of process for treating high-COD waste water " (200810056729.5), " application of a kind of efficient COD remover in wastewater treatment " (201110104136.3) etc. domestic patent focuses mostly at waste water and to reduce the method for COD value, as patent " method of wastewater treatment " (92100458.3), " treatment process and the hydro-thermal reaction device that contain organic water medium " (application number:; And reduce COD pertinent literature report seldom at the kaolin raw material, as article " Yichang Coaseries kaolin low temperature calcination reduces the experimental study of COD " through 500 ℃, 2 hours low temperature calcination, sample ore COD reduces to 578.13ppm by 2892.08ppm; Reached and be used for the kaolinic ingredient requirement of glass; But this method cost is higher, is not suitable for reducing the kaolin of the fertile usefulness of high COD value.
The present invention is directed to the kaolin of the high COD value of China, adopt the method for mixing, oxygenant oxidation, effectively reduce kaolin COD value, technology is simple, and is with low cost, reaches for the kaolinic ingredient requirement of agrochemical.In addition, the present invention effectively reduces the method for agricultural kaolin COD, does not appear in the newspapers as yet both at home and abroad.
Summary of the invention
The object of the present invention is to provide the method for the agricultural kaolin COD of a kind of effective reduction, this method technology is simple, with low cost.
For realizing the object of the invention, the technical solution used in the present invention is: the method for the agricultural kaolin COD of a kind of effective reduction is characterized in that it may further comprise the steps:
1) is 100: 1～2: 1～5 to put into mixing machine and seal the mass ratio of kaolin and Losantin, sodium peroxide, mixes (5～20 minutes), obtain uniform pulverulent mixture;
2) mass ratio by pulverulent mixture and water is 100: 8～12, and spray water in the pulverulent mixture mixed 20～30 minutes fast, and it is fully reacted, and obtains the sample after the hybrid reaction;
3) take out sample after the hybrid reaction, encapsulation obtains the chemical fertilizer carrier with kaolin (being agricultural kaolin).
Described quick stirring refers to mixing speed 〉=800 rev/min.
COD 〉=1500mg/L in the kaolin described in the step 1) (raw ore).
At COD in the kaolin raw ore big (〉=1500mg/L), the present invention adds and reduces the COD oxygenant in the grinding stage in the kaolin production process, simple, economically viable technology reduces the chemical fertilizer carrier with the value of kaolin raw ore COD.
The invention has the beneficial effects as follows: adopt the heat that produces in oxygenant Losantin, sodium peroxide and the mechanical stirring, ion, oxidation operation will be reduced in the kaolin, thereby effectively reduce the COD value in the agricultural kaolin, product can be used for the carrier of agrochemical.The advantage that adopts this method to reduce kaolin COD is can be in the kaolin production process, and the grinding stage adds reagent, does not change protokaolin production technique, low production cost, and this method technology is simple.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but the present invention not only is confined to the following examples.
Embodiment 1:
The method of the agricultural kaolin COD of a kind of effective reduction, it may further comprise the steps:
1) take by weighing kaolin 100 grams, Losantin 1 gram, sodium peroxide 1 gram is put into mixing machine and is sealed, and mixes 5 minutes, obtains uniform powder mixture.
2) spray water (quality of water is 8 grams) in the powder mixture mixed 20 minutes, fully reaction fast.
3) sample after the taking-up hybrid reaction, encapsulation obtains chemical fertilizer carrier kaolin (product).
Product is scattered in (mass ratio by product and water is 1: 100) in the water, adopts potassium permanganate process to measure the COD of water in the product, COD measuring result such as table 1 in the product; Get former state { being the kaolin in the step 1) } and be scattered in (in statu quo the mass ratio with water is 1: 100) in the water, adopt potassium permanganate process to measure the COD of water in the former state, COD measuring result such as following table 1 in the former state.
Table 1
This method of table 1 explanation can effectively reduce the COD in the agricultural kaolin.
Embodiment 2
The method of the agricultural kaolin COD of a kind of effective reduction, it may further comprise the steps:
1) take by weighing kaolin 100 grams, Losantin 1 gram, sodium peroxide 2 grams are put into mixing machine and are sealed, and mix 10 minutes, obtain uniform powder mixture.
2) spray water (quality of water is 10 grams) in the powder mixture mixed 25 minutes, fully reaction fast.
3) sample after the taking-up hybrid reaction, encapsulation obtains chemical fertilizer carrier kaolin (product).
Product is scattered in (mass ratio by product and water is 1: 100) in the water, adopts potassium permanganate process to measure the COD of water in the product, COD measuring result such as table 2 in the product; Get former state (kaolin) and be scattered in (in statu quo the mass ratio with water is 1: 100) in the water, adopt potassium permanganate process to measure the COD of water in the former state, COD measuring result such as following table 2 in the former state.
Table 2
This method of table 2 explanation can effectively reduce the COD in the agricultural kaolin.
Embodiment 3
The method of the agricultural kaolin COD of a kind of effective reduction, it may further comprise the steps:
1) take by weighing kaolin 100 grams, Losantin 2 grams, sodium peroxide 4 grams are put into mixing machine and are sealed, and mix 15 minutes, obtain the uniformed powder mixture.
2) spray water (quality of water is 11 grams) in the powder mixture mixed 25 minutes, fully reaction fast.
3) sample after the taking-up hybrid reaction, encapsulation obtains chemical fertilizer carrier kaolin (product).
Product is scattered in (mass ratio by product and water is 1: 100) in the water, adopts potassium permanganate process to measure the COD of water in the product, COD measuring result such as table 3 in the product; Get former state (kaolin) and be scattered in (in statu quo the mass ratio with water is 1: 100) in the water, adopt potassium permanganate process to measure the COD of water in the former state, COD measuring result such as following table 3 in the former state.
Table 3
This method of table 3 explanation can effectively reduce the COD in the agricultural kaolin.
Embodiment 4
The method of the agricultural kaolin COD of a kind of effective reduction, it may further comprise the steps:
1) take by weighing kaolin (clay mineral kaolin) 100 grams, Losantin 2 grams, sodium peroxide 5 grams are put into mixing machine and are sealed, and mix 20 minutes, obtain uniform powder mixture.
2) spray water (quality of water is 12 grams) in the powder mixture mixed 30 minutes, fully reaction fast.
3) sample after the taking-up hybrid reaction, encapsulation obtains chemical fertilizer carrier kaolin (product).
Product is scattered in (mass ratio by product and water is 1: 100) in the water, adopts potassium permanganate process to measure the COD of water in the product, COD measuring result such as table 4 in the product; Get former state (clay mineral kaolin) and be scattered in (in statu quo the mass ratio with water is 1: 100) in the water, adopt potassium permanganate process to measure the COD of water in the former state, COD measuring result such as following table 4 in the former state.
Table 4
This method of table 4 explanation can effectively reduce the COD in the agricultural kaolin.
Claims (1)
1. method that effectively reduces agricultural kaolin COD is characterized in that it may further comprise the steps:
1) kaolin and Losantin, sodium peroxide are put into mixing machine with the mass ratio of 100:1～2: 1～5 and sealed, mix, obtain uniform pulverulent mixture;
2) mass ratio by pulverulent mixture and water is 100: 8～12, and spray water in the pulverulent mixture mixed 20～30 minutes fast, and it is fully reacted, and obtains the sample after the hybrid reaction;
3) sample after the taking-up hybrid reaction, encapsulation obtains chemical fertilizer carrier kaolin.
2.The method of the agricultural kaolin COD of a kind of effective reduction according to claim 1 is characterized in that: described quick stirring refers to mixing speed 〉=800 rev/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110371546 CN102502679B (en) | 2011-11-21 | 2011-11-21 | Method for effectively reducing chemical oxygen demand (COD) of agricultural kaolin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110371546 CN102502679B (en) | 2011-11-21 | 2011-11-21 | Method for effectively reducing chemical oxygen demand (COD) of agricultural kaolin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102502679A CN102502679A (en) | 2012-06-20 |
| CN102502679B true CN102502679B (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110371546 Expired - Fee Related CN102502679B (en) | 2011-11-21 | 2011-11-21 | Method for effectively reducing chemical oxygen demand (COD) of agricultural kaolin |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3655417A (en) * | 1970-03-02 | 1972-04-11 | Georgia Kaolin Co | Clay processing |
| WO1994022784A1 (en) * | 1993-04-06 | 1994-10-13 | Engelhard Corporation | Improved method for bleaching kaolin clay |
| CN1555347A (en) * | 2001-09-14 | 2004-12-15 | 英默里斯颜料公司 | Integrated process for simultaneous beneficiation, leaching, and dewatering of kaolin clay suspension |
-
2011
- 2011-11-21 CN CN 201110371546 patent/CN102502679B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3655417A (en) * | 1970-03-02 | 1972-04-11 | Georgia Kaolin Co | Clay processing |
| WO1994022784A1 (en) * | 1993-04-06 | 1994-10-13 | Engelhard Corporation | Improved method for bleaching kaolin clay |
| CN1555347A (en) * | 2001-09-14 | 2004-12-15 | 英默里斯颜料公司 | Integrated process for simultaneous beneficiation, leaching, and dewatering of kaolin clay suspension |
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|---|---|
| CN102502679A (en) | 2012-06-20 |
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