CN115893597A - Efficient anti-hardening micro-electrolysis filler and preparation method thereof - Google Patents
Efficient anti-hardening micro-electrolysis filler and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-efficiency anti-hardening micro-electrolysis filler and a preparation method thereof, wherein the high-efficiency anti-hardening micro-electrolysis filler comprises the following components in parts by mass: 35 to 50 parts of iron powder, 20 to 30 parts of carbon powder, 30 to 40 parts of buffer material, 2~5 parts of adhesive, 8 to 10 parts of catalyst and 20 to 30 parts of water; the buffer material consists of 12 to 18 parts by mass of bentonite, 8 to 15 parts by mass of heavy calcium carbonate and 5 to 15 parts by mass of magnesium aluminum silicate; the adhesive consists of 1~3 parts of white dextrin and 1~3 parts of sodium silicate in parts by mass; the catalyst consists of 2~5 parts of chromium ore powder, 3~8 parts of titanium oxide powder and 3~8 parts of brass powder in parts by mass, iron powder, carbon powder, a buffer material and the catalyst are primarily mixed, then an adhesive and water are added into the primary mixed material to be mixed again, the form of the mixed material in the mixing process is controlled through reaction heat release, and the uniformity of the mixed material is ensured; and placing the mixture into a mold to form ellipsoidal particles, and performing high-temperature sintering and cooling after natural air drying, heating, air blasting and drying to obtain the micro-electrolysis filler. The filler has no hardening inside and outside, stable and excellent performance, easy balling and certain cold strength.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment materials, and particularly relates to a high-efficiency anti-hardening micro-electrolysis filler and a preparation method thereof.
Background
The micro-electrolysis technology is to use the potential range formed by iron and carbon elements in solution to form a primary battery, so that the long chain of macromolecular organic matters or aromatic hydrocarbon cyclic organic matters is opened and broken, thereby improving the biodegradability of the wastewater and having good efficiency in destroying heavy metal complexes and replacing heavy metal ions. The action mechanism of micro-electrolysis mainly comprises a micro-battery principle, an oxidation-reduction reaction, flocculation, adsorption and coprecipitation mechanism, and the pollutants are removed by utilizing the oxidation-reduction reaction of generated ferrous ions, reduced hydrogen, active oxygen and wastewater pollutants. Although efficient, economical and practical, the iron-carbon micro-electrolysis technology has the following limitations in the operation process: 1) The reaction efficiency is low, compared with other physical and chemical treatment technologies, the micro-electrolysis degradation efficiency is low, and most of the reaction time is more than 2 hours; 2) The iron-carbon micro-electrolysis material is easy to harden, so that the electron transfer between iron and carbon is blocked, and the phenomena of short current, agglomeration and the like are finally caused in the micro-electrolysis reactor along with the gradual and serious hardening, so that the micro-electrolysis reaction efficiency is greatly reduced until the micro-electrolysis material loses efficacy and cannot be permanently acted in the sewage treatment process. Therefore, an efficient and anti-hardening filler is urgently needed in the field of industrial park wastewater treatment.
Disclosure of Invention
The invention aims to provide an efficient and anti-hardening micro-electrolysis filler and a preparation method thereof, which are used for solving the technical problems of low reaction efficiency, easy hardening, low durability and the like of the existing micro-electrolysis filler.
In order to realize the purpose, the invention adopts the following technical scheme:
the high-efficiency anti-hardening micro-electrolysis filler comprises the following components in parts by mass:
35 to 50 parts of iron powder, 20 to 30 parts of carbon powder, 30 to 40 parts of buffer material, 2~5 parts of adhesive, 8 to 10 parts of catalyst and 20 to 30 parts of water;
the buffer material comprises, by mass, 12 to 18 parts of bentonite, 8 to 15 parts of heavy calcium carbonate and 5 to 15 parts of magnesium aluminum silicate;
the adhesive consists of 1~3 parts of white dextrin and 1~3 parts of sodium silicate in parts by mass;
the catalyst consists of 2~5 parts of chromium ore powder, 3~8 parts of titanium oxide powder and 3~8 parts of brass powder in parts by mass.
Further, the configuration of the buffer material comprises the following steps: mixing bentonite, heavy calcium carbonate and magnesium aluminum silicate in parts by mass, wherein the stirring speed is 60 to 80rpm, and the stirring time is 10 to 15min.
Further, the configuration of the catalyst comprises the following steps: mixing the chrome ore powder, the titanium oxide powder and the brass powder in parts by mass, and stirring at the rotating speed of 60 to 80rpm for 10 to 15min.
Further, the configuration of the adhesive comprises the following steps: mixing and stirring the white dextrin and the sodium silicate in parts by mass at a rotating speed of 50-60rpm for 8-10min.
Further, the invention also discloses a preparation method of the high-efficiency anti-hardening micro-electrolysis filler, which comprises the following steps:
preparing the buffer material by mass parts with 12 to 18 parts of bentonite, 8 to 15 parts of heavy calcium carbonate and 5 to 15 parts of magnesium aluminum silicate;
2~5 parts of chromium ore powder, 3~8 parts of titanium oxide powder and 2~8 parts of brass powder are taken to prepare the catalyst in parts by mass;
1~3 parts of white dextrin and 1~3 parts of sodium silicate are taken to prepare the adhesive in parts by mass;
taking the iron powder, the carbon powder, the buffer material and the catalyst in parts by mass for preliminary mixing, then adding the adhesive in parts by mass into the mixture for mixing again, adding the water in parts by mass of 10-15 after the powder materials are uniformly mixed, and mixing until the moisture of the mixed wet material is uniform to form a slight wet material;
preferably, the weight part of the iron powder is 25-40 for 40-60 meshes, and the weight part of the iron powder is 10-20 for 200 meshes;
aging and cooling the wet material for 4 to 6 hours, and then adding 10 to 15 parts by mass of water again for mixing;
slowly introducing the secondary water-added wet material into a mold, and pressing and demolding to form ellipsoidal particles;
stirring and mixing the primary mixture at the stirring speed of 60 to 80rpm for 20 to 40min;
the mixture releases heat to 50 to 70 ℃ in the water adding process after mixing again, so water needs to be added intermittently, the stirring and mixing speed is 40 to 60rpm, and the stirring time is 10 to 30min;
naturally drying the stripped ellipsoidal filler for more than 24 hours, and sending the ellipsoidal filler into an oven in batches for drying at the drying temperature of 80-100 ℃ for more than 8 hours;
filling the dried filler in a crucible, filling a gap between the filler and the crucible with coal powder, and covering cordierite powder with the thickness of 1 to 3mm at the top end of the filler;
the crucible is sent into a muffle furnace or a tunnel furnace for high-temperature sintering, and after natural cooling, the high-efficiency anti-hardening micro-electrolysis filler is prepared;
wherein the high-temperature sintering step is as follows:
when the temperature in the furnace is below 300 ℃, controlling the heating rate not to be more than 5 ℃/min;
controlling the heating rate to be not more than 3 ℃/min when the temperature in the furnace is 300 to 800 ℃; and keeping the temperature for 2 to 4 hours when the temperature is raised to 800 ℃;
controlling the heating rate to be not more than 2 ℃/min when the temperature in the furnace is 800 to 1150 ℃, and preserving the heat for 4 to 8h when the temperature is raised to 1150 ℃;
and after the procedures are completed, taking out the crucible when the temperature in the furnace is reduced to be below 100 ℃, removing the coal powder, and naturally drying and cooling the sintered filler to room temperature to obtain the micro-electrolysis filler.
Compared with the prior art, the invention has the beneficial effects that: taking the iron powder, the carbon powder, the buffer material and the catalyst in parts by mass in the range of the invention for preliminary mixing, then adding the adhesive and the water in parts by mass into the preliminary mixing material for secondary mixing, controlling the form of the mixing material in the mixing process through reaction heat release, and ensuring the uniformity of the mixing material; and placing the mixture into a mold to form ellipsoidal particles, and obtaining the micro-electrolysis filler through high-temperature sintering and cooling steps after natural air drying and heating, blowing and drying. The binder has good effect, so that the mixture is easy to form balls, has certain cold strength, and can not be broken before and during the sintering of the filler; the iron powder with different meshes can form a framework of the filler after the mixture is pelletized, so that the uniformity and stability of the filler are ensured; the addition of the buffer material not only reduces the melting temperature of the micro-electrolysis filler, but also can maintain the micro-electrolysis reaction on a stable reaction curve; copper, chromium, titanium and the like in the catalyst can enhance the activity of micro-electrolysis reaction, and ensure the hardness of micro-electrolysis filler, so that the micro-electrolysis reaction cannot generate passivation, polarization and other phenomena along with the extension of reaction time, and simultaneously ensure that the filler preferentially degrades pollutants on the surface layer of the reaction filler in the water treatment process, and improve the efficiency of the micro-electrolysis reaction in a mode of consumption and stripping layer by layer of the filler, and the filler has no hardening inside and outside and has stable and excellent performance.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the steps of a preparation method of example 1 of the present invention;
FIG. 2 is a flowchart of the steps of the preparation process of example 2 of the present invention;
FIG. 3 is a flow chart of the steps of a preparation method of comparative example 1 of the present invention;
FIG. 4 is a flow chart of the steps of a manufacturing method of comparative example 2 of the present invention;
FIG. 5 is a raw material diagram of the high-efficiency anti-hardening micro-electrolysis filler prepared in example 1 of the invention;
FIG. 6 is a diagram of a finished product of the high-efficiency anti-hardening micro-electrolysis filler prepared in example 1;
FIG. 7 is a raw material diagram of the high-efficiency anti-hardening micro-electrolysis filler prepared in example 2;
FIG. 8 is a diagram of a finished product of the high-efficiency anti-hardening micro-electrolysis filler prepared in example 2;
FIG. 9 is a raw material diagram of the high-efficiency anti-hardening micro-electrolysis filler prepared in comparative example 1;
FIG. 10 is a graph of a sample of the high efficiency anti-plate micro-electrolysis filler prepared after reaction for 90d in comparative example 2;
FIG. 11 is an SEM photograph of example 1 of the present invention;
FIG. 12 is an SEM photograph of example 2 of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments and the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Example 1:
referring to fig. 1, the invention provides a preparation method of an efficient anti-hardening micro-electrolysis filler, which comprises the following steps:
s1: preparing 30 parts of buffer material;
s2: preparing 8 parts of catalyst;
s3: preparing 2 parts of adhesive;
s4: mixing 30 parts of 40-mesh iron powder, 15 parts of 200-mesh iron powder, 20 parts of carbon powder, 30 parts of buffer material and 8 parts of catalyst, stirring at the rotating speed of 60rpm for 30min, adding 2 parts of adhesive into the primary mixture, continuously mixing, simultaneously adding 25 parts of water intermittently, stirring at the rotating speed of 40rpm for 10min, and keeping the temperature of the mixture at about 50 ℃ (intermittently adding water to control the temperature) to form a mixture with certain viscosity;
s5: after the mixture is aged and cooled, the mixture is led into a grinding tool to form ellipsoidal particles;
s6: placing the obtained ellipsoidal particles in a cool and ventilated place, naturally airing for 24 hours, and then sending the ellipsoidal particles into an oven in batches for drying at the drying temperature of 80 ℃ for 14 hours;
s7: filling the ellipsoidal particles into a crucible after the ellipsoidal particles are naturally cooled, filling gaps between the filler and the crucible with coal powder, and covering cordierite powder with the thickness of 3mm at the top end of the filler;
s8: feeding the crucible loaded with the filler into a muffle furnace for high-temperature sintering, wherein the heating rate is controlled to be 3 ℃/min when the temperature in the furnace is below 300 ℃ during sintering, and the heating rate is controlled to be 2 ℃/min when the temperature in the furnace is 300 to 800 ℃; and when the temperature is increased to 800 ℃, keeping the temperature for 2h, when the temperature in the furnace is 800 to 1150 ℃, controlling the heating rate to be 1 ℃/min, when the temperature is increased to 1150 ℃, keeping the temperature for 4h, when the temperature in the furnace is reduced to be below 100 ℃, taking out the crucible, removing the coal powder, and naturally airing and cooling the sintered filler to obtain the micro-electrolysis filler.
In this embodiment, 2 parts of binder is prepared by mixing 1 part of white dextrin and 1 part of sodium silicate; then mixing 3 parts of chromium ore powder, 3 parts of titanium oxide powder and 2 parts of brass powder to prepare a catalyst; then mixing 15 parts of bentonite, 10 parts of heavy calcium carbonate and 5 parts of magnesium aluminum silicate to form 30 parts of buffer material; and then mixing carbon powder, a catalyst, a buffer material and iron powder with different meshes to form a primary mixed material, adding an adhesive and water in parts by mass, continuously stirring and mixing, ensuring the uniformity of the raw materials through an exothermic reaction in the process, ensuring the uniformity of the prepared micro-electrolysis filler, and keeping the micro-electrolysis filler stable in water after molding. The addition of the white dextrin and the sodium silicate is convenient for stable forming of the mixture, and the two materials do not bring about side reaction after high-temperature sintering; the existence of the buffer material ensures that the micro-electrolysis reaction anode is stably dissolved out, so that a certain amount of ions exist in the sewage, and the efficiency of the micro-electrolysis reaction is improved; iron powder with different meshes can form a uniform and firm framework after the filler is pelletized, so that the filler realizes the effect of peeling layer by layer; the catalyst is added, so that the strength of the micro-electrolysis filler can be greatly enhanced, and the efficiency of micro-electrolysis reaction in the sewage treatment process is further improved. The operation of drying the filler in the shade and then drying the filler before high-temperature sintering can avoid the problem that the filler structure is damaged when the temperature is raised in a muffle furnace due to high water content of the filler; under the action of the buffer material, the melting temperature of the filler is reduced, and after high-temperature sintering and cooling, the phenomena of hardening, perforation and the like do not occur on the surface and the inside of the filler, so that the filler has the advantages of high activity, excellent treatment effect, no passivation and the like. The coal powder is filled between the crucible and the filler and between the filler and the filler, so that the micro-electrolysis filler can be ensured to be in a reductive atmosphere during sintering, the content of effective components in the obtained filler is ensured to be stable, and the quality and the efficiency of the obtained micro-electrolysis filler are effectively improved.
Example 2:
referring to fig. 2, the invention provides a preparation method of an efficient anti-hardening micro-electrolysis filler, which comprises the following steps:
s1: preparing 35 parts of buffer material;
s2: preparing 10 parts of catalyst;
s3: 5 parts of adhesive is prepared;
s4: 25 parts of 40-mesh iron powder, 15 parts of 200-mesh iron powder, 20 parts of carbon powder, 25 parts of buffer material, 10 parts of catalyst and 15 parts of water are mixed, and the stirring speed is 50rpm and the stirring time is 30min. Cooling and aging the mixture for 2h, adding 5 parts of binder, continuously adding 12 parts of water, mixing and stirring again to form a slightly wet state;
s5: pressing and demoulding the mixed micro-wet material to form ellipsoidal particles;
s6: placing the ellipsoidal particles in a cool and ventilated place for drying for 26h, and then sending the ellipsoidal particles into a blast oven for continuous drying at the drying temperature of 90 ℃ for 12h;
s7: placing the ellipsoidal particles in a crucible after the temperature of the ellipsoidal particles is reduced, filling the particles and the particles, and gaps between the particles and the crucible with pulverized coal, and covering cordierite powder with the thickness of 2mm on the top end of the filler;
s8: placing the crucible loaded with the filler into a muffle furnace for sintering, and controlling the heating rate to be 2 ℃/min when the temperature in the furnace is below 800 ℃ during sintering; and when the temperature is increased to 800 ℃, keeping the temperature for 2h, when the temperature in the furnace is 800 to 1150 ℃, controlling the heating rate to be 1 ℃/min, when the temperature is increased to 1150 ℃, keeping the temperature for 6h, when the temperature in the furnace is reduced to below 100 ℃, taking out the crucible, removing the coal powder, and naturally airing and cooling the sintered filler to obtain the micro-electrolysis filler.
In the embodiment, 3 parts of white dextrin and 2 parts of sodium silicate are mixed to prepare 5 parts of adhesive, and then 2 parts of chromium ore powder, 2 parts of titanium oxide powder and 4 parts of brass powder are mixed to prepare the catalyst; then mixing 12 parts of bentonite, 8 parts of heavy calcium carbonate and 5 parts of magnesium aluminum silicate to form 25 parts of buffer material; and then adding water, carbon powder, a catalyst, a buffer material and iron powder with different meshes for mixing, ensuring the uniformity of the mixture by utilizing the natural heat release in the process, and then continuing adding 5 parts of a binder and 12 parts of water after the mixture is aged and cooled to ensure the smooth completion of the subsequent pressing and demolding processes. Wherein the adhesive mainly containing the white dextrin is decomposed at high temperature, so that the filler sintered at high temperature can not bring new pollutants for water; the existence of calcium and magnesium ions in the buffer material ensures the stable dissolution of the micro-electrolysis reaction anode, so that a certain amount of anions and cations exist in the sewage, and the mass transfer efficiency of the micro-electrolysis reaction is improved; iron powder with different meshes can form a uniform and firm framework after the filler is pelletized, so that the filler realizes the effect of peeling layer by layer; the addition of the catalyst can not only greatly strengthen the strength of the micro-electrolysis filler, but also further improve the efficiency of micro-electrolysis reaction in the sewage treatment process. The operation of drying the filler in the shade and then drying the filler before high-temperature sintering can avoid the problem that the internal structure of the filler is damaged when the water content of the filler is too high and the temperature is raised in a muffle furnace; under the action of the buffer material, the melting temperature of the filler is reduced, and after high-temperature sintering and cooling, the phenomena of hardening, perforation and the like do not occur on the surface and the inside of the filler, so that the filler has the advantages of high activity, excellent treatment effect, no passivation and the like. The coal powder is filled between the crucible and the filler and between the filler and the filler, so that the micro-electrolysis filler can be ensured to be in a reductive atmosphere during sintering, the content of effective components in the obtained filler is ensured to be stable, and the quality and the efficiency of the obtained micro-electrolysis filler are effectively improved.
Comparative example 1:
to fully demonstrate the beneficial effects of the present invention, the fabrication of comparative example 1 was performed with reference to fig. 3, which includes the following steps.
S1: preparing 30 parts of buffer material;
s2: preparing 10 parts of catalyst;
s3: mixing 30 parts of 40-mesh iron powder, 15 parts of 200-mesh iron powder, 20 parts of carbon powder, 30 parts of buffer material and 10 parts of catalyst, stirring at the rotating speed of 60rpm for 30min, simultaneously adding 25 parts of water intermittently, stirring at the rotating speed of 40rpm for 10min, and keeping the temperature of the mixture at about 50 ℃ (intermittently adding water to control the temperature) to form a mixture;
s4: after the mixture is cooled, the mixture is led into a grinding tool and is pressurized to form ellipsoidal particles;
s5: placing the obtained ellipsoidal particles in a cool and ventilated place, naturally airing for 24 hours, and then sending the ellipsoidal particles into an oven in batches for drying at the drying temperature of 80 ℃ for 14 hours;
s6: after the ellipsoidal particles are naturally cooled, filling the ellipsoidal particles in a crucible, filling gaps between fillers and the crucible with pulverized coal, and covering cordierite powder with the thickness of 3mm on the top of the fillers;
s7: feeding the crucible loaded with the filler into a muffle furnace for high-temperature sintering, wherein the heating rate is controlled to be 3 ℃/min when the temperature in the furnace is below 300 ℃ during sintering, and the heating rate is controlled to be 2 ℃/min when the temperature in the furnace is 300 to 800 ℃; and when the temperature is increased to 800 ℃, keeping the temperature for 2h, when the temperature in the furnace is 800 to 1150 ℃, controlling the heating rate to be 1 ℃/min, when the temperature is increased to 1150 ℃, keeping the temperature for 4h, when the temperature in the furnace is reduced to be below 100 ℃, taking out the crucible, removing the coal powder, and naturally airing and cooling the sintered filler to obtain the filler.
In this comparative example 1, the micro-electrolytic pellets were produced only by the material and water itself without adding a binder, and then sintered. In the operation process, the micro-electrolysis pellet manufactured by the method has poor cold strength, the breakage rate of the filler in the moving and transporting processes reaches more than 22 percent, and the reduction of the manufacturing cost of the final pellet is seriously restricted. The physical properties of the filler are compared with those of the filler in examples 1 and 2 and are shown in an attached table 1, and the crushing condition of the filler is shown in an attached figure 5.
Comparative example 2:
to fully demonstrate the beneficial effects of the present invention, the fabrication of comparative example 2 was performed with reference to fig. 4, and the steps were as follows.
S1: preparing 5 parts of buffer material;
s2: preparing 3 parts of catalyst;
s3: preparing 2 parts of adhesive;
s4: mixing 50 parts of 40-mesh iron powder, 25 parts of 200-mesh iron powder, 20 parts of carbon powder, 5 parts of buffer material and 3 parts of catalyst, stirring at the rotating speed of 60rpm for 30min, adding 2 parts of adhesive into the primary mixture, continuously mixing, simultaneously adding 25 parts of water intermittently, stirring at the rotating speed of 40rpm for 10min, and keeping the temperature of the mixture at about 50 ℃ (intermittently adding water to control the temperature) to form a mixture with certain viscosity;
s5: after the mixture is aged and cooled, the mixture is led into a grinding tool to form ellipsoidal particles;
s6: placing the obtained ellipsoidal particles in a cool and ventilated place, naturally airing for 24 hours, and then sending the ellipsoidal particles into an oven in batches for drying at the drying temperature of 80 ℃ for 14 hours;
s7: filling the ellipsoidal particles into a crucible after the ellipsoidal particles are naturally cooled, filling gaps between the filler and the crucible with coal powder, and covering cordierite powder with the thickness of 3mm at the top end of the filler;
s8: feeding the crucible loaded with the filler into a muffle furnace for high-temperature sintering, wherein the heating rate is controlled to be 3 ℃/min when the temperature in the furnace is below 300 ℃ during sintering, and the heating rate is controlled to be 2 ℃/min when the temperature in the furnace is 300 to 800 ℃; and when the temperature is increased to 800 ℃, keeping the temperature for 2h, when the temperature in the furnace is 800 to 1150 ℃, controlling the heating rate to be 1 ℃/min, when the temperature is increased to 1150 ℃, keeping the temperature for 4h, when the temperature in the furnace is reduced to be below 100 ℃, taking out the crucible, removing the coal powder, and naturally airing and cooling the sintered filler to obtain the micro-electrolysis filler.
In the comparative example 2, only 5 parts of buffer material is added, which is far lower than the amount of 30 to 40 parts required by the invention, and the content of iron in the filler is correspondingly improved. The phenomena of low filler yield and high strength appear in the whole process of filler mixing and ball pressing sintering. In the laboratory test process, the filler prepared in the comparative example 2 has a strong pollutant degradation effect at the initial stage of the reaction, but has an obvious attenuation effect, and the amount of iron mud covered on the surface of the filler is large, so that the long-term stable operation of the filler is restricted, as shown in detail in fig. 7.
The results of testing the properties of the junction microelectrolytic fillers of inventive example 1, example 2 and comparative example 1 are shown in table 1 below.
Table 1 is a table of properties for example 1, example 2 and comparative example 1.
| Crushing Strength of the raw materials (before sintering) (N) | Clinker crushing strength (after sintering) (N) | Specific surface area (m/g) | Average pore diameter (nm) | |
| Example 1 | 563N | 6319N | 12.6684 | 9.7552 |
| Example 2 | 427N | 6227N | 14.1453 | 8.6647 |
| Comparative example 1 | 96N | 3874N | 16.2267 | 6.3956。 |
The data show that the micro-electrolysis filler obtained by the invention is easy to form balls, has certain cold strength, higher hardness and stable and excellent performance.
The foregoing is merely illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention or exceeding the scope of the claims set forth below.
Claims (9)
1. The high-efficiency anti-hardening micro-electrolysis filler is characterized by comprising the following components in parts by mass:
35 to 50 parts of iron powder, 20 to 30 parts of carbon powder, 30 to 40 parts of buffer material, 2~5 parts of adhesive, 8 to 10 parts of catalyst and 20 to 30 parts of water;
the buffer material comprises, by mass, 12 to 18 parts of bentonite, 8 to 15 parts of heavy calcium carbonate and 5 to 15 parts of magnesium aluminum silicate;
the adhesive consists of 1~3 parts of white dextrin and 1~3 parts of sodium silicate in parts by mass;
the catalyst consists of 2~5 parts of chromium ore powder, 3~8 parts of titanium oxide powder and 3~8 parts of brass powder in parts by mass.
2. The highly effective hardening-resistant micro-electrolysis filler according to claim 1, wherein the buffer material is configured by the following steps: mixing bentonite, heavy calcium carbonate and magnesium aluminum silicate in parts by mass, wherein the stirring speed is 60 to 80rpm, and the stirring time is 10 to 15min.
3. The highly effective hardening-resistant microelectrolytic filler according to claim 1, wherein the catalyst is configured to comprise the following steps: mixing the chrome ore powder, the titanium oxide powder and the brass powder in parts by mass, and stirring at the rotating speed of 60 to 80rpm for 10 to 15min.
4. The efficient hardening-resistant microelectrolytic filler according to claim 1, wherein the adhesive is configured to include the following steps: mixing and stirring the white dextrin and the sodium silicate in parts by mass at a rotating speed of 50-60rpm for 8-10min.
5. The method for preparing the high-efficiency hardening-resistant micro-electrolysis filler according to claim 1, which is characterized by comprising the following steps:
(1) Configuring the buffer material;
(2) Preparing the catalyst;
(3) Configuring the adhesive;
(4) Taking the iron powder, the carbon powder, the buffer material and the catalyst in parts by mass for preliminary mixing, then adding the adhesive in parts by mass into the mixture for remixing, after the mixed powder is uniformly mixed, intermittently adding 10 to 15 parts by mass of water for mixing until the moisture of the mixed wet material is uniform, aging and cooling the wet material, and then adding 10 to 15 parts by mass of water again for mixing;
(5) Slowly introducing the secondary water-added wet material into a mould, and pressing and demoulding to form ellipsoidal particles;
(6) Naturally drying the stripped ellipsoidal particles by air and drying by blast air until the weight of the ellipsoidal particles is not changed;
(7) And sintering the dried ellipsoidal particles in a muffle furnace, and cooling to room temperature to obtain the filler.
6. The method for preparing the high-efficiency hardening-resistant micro-electrolysis filler according to claim 5, wherein the weight parts of the 40-mesh iron powder and the 200-mesh iron powder added in the step (4) are respectively 25 to 40 parts and 10 to 20 parts; during primary mixing, the stirring speed is 60 to 80rpm, and the stirring time is 20 to 40min;
when mixing again, the mixing speed is 40 to 60rpm, and the stirring time is 10 to 30min;
adding water for mixing for the first time, and aging and cooling for 4-6 h.
7. The method for preparing the highly effective hardening-resistant micro-electrolysis filler according to claim 5, wherein, in the step (6),
naturally drying in shade for over 24 hr;
the forced air drying temperature is 80 to 100 ℃, and the drying time is more than 8 hours.
8. The method for preparing the highly effective hardening-resistant micro-electrolysis filler according to claim 5, wherein in the step (7):
when the temperature in the furnace is below 300 ℃, controlling the heating rate not to be more than 5 ℃/min;
controlling the heating rate to be not more than 3 ℃/min when the temperature in the furnace is 300 to 800 ℃; and keeping the temperature for 2 to 4 hours when the temperature is raised to 800 ℃;
controlling the heating rate to be not more than 2 ℃/min when the temperature in the furnace is 800 to 1150 ℃, and preserving the heat for 4 to 8h when the temperature is increased to 1150 ℃.
9. The method for preparing the highly effective hardening-resistant micro-electrolysis filler according to claim 5, wherein in the step (7): and taking out the micro-electrolysis filler after the temperature in the muffle furnace is reduced to 100 ℃, and naturally air-drying and cooling the micro-electrolysis filler to room temperature to obtain the micro-electrolysis filler.
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| CN (1) | CN115893597A (en) |
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2022
- 2022-12-23 CN CN202211661363.0A patent/CN115893597A/en active Pending
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