CN114685141A - Iron-removing whitening method for ceramic raw material - Google Patents
Iron-removing whitening method for ceramic raw material Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002994 raw material Substances 0.000 title claims abstract description 32
- 230000002087 whitening effect Effects 0.000 title claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 126
- 229910052742 iron Inorganic materials 0.000 claims abstract description 61
- 239000007787 solid Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000001035 drying Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000000047 product Substances 0.000 claims abstract description 16
- 238000007873 sieving Methods 0.000 claims abstract description 14
- 238000000498 ball milling Methods 0.000 claims abstract description 12
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229960001484 edetic acid Drugs 0.000 claims abstract description 9
- 239000006227 byproduct Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- OVBJJZOQPCKUOR-UHFFFAOYSA-L EDTA disodium salt dihydrate Chemical compound O.O.[Na+].[Na+].[O-]C(=O)C[NH+](CC([O-])=O)CC[NH+](CC([O-])=O)CC([O-])=O OVBJJZOQPCKUOR-UHFFFAOYSA-L 0.000 claims description 8
- 238000005119 centrifugation Methods 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- FXKZPKBFTQUJBA-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;sodium;dihydrate Chemical compound O.O.[Na].[Na].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O FXKZPKBFTQUJBA-UHFFFAOYSA-N 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 30
- 239000004576 sand Substances 0.000 description 28
- 239000002131 composite material Substances 0.000 description 10
- 239000000725 suspension Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000001354 calcination Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 7
- 229910052573 porcelain Inorganic materials 0.000 description 7
- 239000003337 fertilizer Substances 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052572 stoneware Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- JVXHQHGWBAHSSF-UHFFFAOYSA-L 2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate;hydron;iron(2+) Chemical compound [H+].[H+].[Fe+2].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O JVXHQHGWBAHSSF-UHFFFAOYSA-L 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 241000227425 Pieris rapae crucivora Species 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229910052656 albite Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/10—Eliminating iron or lime
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
Abstract
The invention discloses a method for removing iron and whitening ceramic raw materials, which comprises the following steps: mixing ethylene diamine tetraacetic acid and ethylene diamine tetraacetic acid disodium dihydrate, and uniformly stirring to obtain a solid A; drying, crushing and sieving the ceramic sand-mud material to obtain a solid B; dispersing the solid B in water, stirring, ball-milling, and adding the solid A to obtain a liquid A; continuously stirring, and heating the liquid A in a constant-temperature water bath; centrifuging the liquid A after the water bath heating is finished to obtain a solid C and a liquid B; drying, crushing and sieving the solid C to obtain a product solid D; and filtering, crystallizing and drying the liquid B to obtain a byproduct solid E. The method can simultaneously meet the requirements of removing iron and whitening the muddy and sandy raw materials, and the generated waste liquid can be prepared into byproducts through simple treatment, thereby reducing the production cost. In addition, the equipment, instruments, conditions and the like related to the method are easy to realize, and have certain practical value.
Description
Technical Field
The invention relates to the technical field of ceramic materials, in particular to a method for removing iron and whitening ceramic raw materials.
Background
Common types of ceramics include three main types of building ceramics, sanitary ceramics and daily ceramics, and specifically include ceramic tiles, wash basins, urinals, bowls, plates and the like. The ceramic product has corresponding use functions, ornamental value and artistic value, so that the ceramic product is favored by people and becomes a material widely used in life. With the improvement of living standard, the aesthetic ability of people is increasingly improved, and the ornamental and artistic requirements of the ceramic products are higher.
Ceramics have many process specifications such as flexural strength, corrosion resistance, etc. Wherein, the whiteness can influence the ornamental value and the artistic value of the ceramic product. Ceramic products with high whiteness, such as large ceramic plates, are preferred as decorative decorations, and the whiteness can reach 70 degrees; porcelain bowls and porcelain plates are selected as tableware, and the whiteness of the tableware reaches 65-85 degrees. The main factor influencing the whiteness of the ceramic product is the iron content of the raw materials. The relationship between the color and iron content of the ceramic product is shown in the following table:
Fe2O3influence of content on color development of ceramic product
| Fe2O3Content (%) | Color formation during firing in oxidizing flame | Products suitable for manufacture |
| <0.40 | Extra white | High-grade daily-use porcelain and building ceramic |
| <0.80 | White, common white | Fine porcelain, white stoneware porcelain and fine pottery |
| 0.80 | Off-white color | General fine porcelain and white stoneware |
| 1.3 | Yellow-white color | Common porcelain and stoneware device |
| 2.7 | Light yellow | Pottery and stoneware |
The raw materials of ceramics are divided into three main categories: clay, feldspar and quartz all belong to non-renewable mineral resources. To impart high whiteness to the ceramic articles, Fe is often selected2O3The raw materials with low content are used for manufacturing ceramics. However, the cost of such raw materials is high and with the rapid development of the ceramic industry over the years, the storage capacity is also getting smaller and smaller. To solve this problem, Fe may be added2O3Iron removal treatment is carried out on low-grade raw materials with high content and low whiteness to ensure that the raw materials are Fe2O3The content is reduced, the whiteness is increased, and the natural high-grade raw materials are replaced to a certain extent. This is both a technical pursuit of ceramic practitioners and an inevitable requirement for practical production and sustainable development.
At present, a plurality of methods for removing iron from ceramic raw materials exist, such as a flotation method, a magnetic separation method, a high-temperature chlorination method, an acid treatment method, a microbial oxidation method and the like, and all the methods have certain limitations. For example, the common magnetic separation method is to attach ceramic slurry with strong magnetic field to make magnetic iron adsorbed on iron remover and separated from ceramic slurry to reach the aim of removing iron. However, it has no effect of removing the non-magnetic iron in the ceramic slurry, and is not good for the slurry having a large viscosity. In addition, the magnet slag adsorbed on the iron remover belongs to solid waste, and the utilization value is difficult to generate.
The traditional iron removal method is mainly divided into a physical method and a chemical method. For physical iron removal, the effect of treating sandy raw materials is better, and the effect of muddy raw materials is generally poorer. In addition, in the process of removing iron, solid waste is generated, the iron content is too high, and the additional value is difficult to generate; for chemical iron removal, the iron removal effect is good, but the cost is high, and the actual production is not facilitated.
Therefore, Fe capable of reducing ceramic pug and sand is provided2O3The content and the calcination whiteness of the white carbon are improved, and the method is a technical problem which needs to be solved in the field.
Disclosure of Invention
In view of the above, the present invention provides a method for removing iron and whitening ceramic raw materials, comprising: the ceramic raw material is treated by the composite iron remover, so that the Fe of the ceramic sand material and the mud material2O3The content is reduced, and the calcination whiteness is improved. Meanwhile, the by-product generated by removing iron can be used in the field of iron fertilizer, can generate better additional value, and is beneficial to reducing the treatment cost and sustainable development.
In order to achieve the purpose, the invention adopts the following technical scheme:
an iron-removing and whitening method for ceramic raw materials comprises the following steps:
(1) mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate, and uniformly stirring to obtain solid A for later use;
(2) drying, crushing and sieving the ceramic sand-mud material to obtain solid B for later use;
(3) dispersing the solid B in water, stirring, ball-milling, and adding the solid A to obtain liquid A;
(4) continuously stirring the liquid A, and heating the liquid A in a constant-temperature water bath;
(5) centrifuging the liquid A after the water bath heating is finished to obtain a solid C and a liquid B;
(6) drying, crushing and sieving the solid C to obtain a product solid D;
(7) and filtering, crystallizing and drying the liquid B to obtain a byproduct solid E.
Further, the mass ratio of the ethylenediaminetetraacetic acid to the disodium ethylenediaminetetraacetate dihydrate in the step (1) is 4: 5.
In the step (2), the drying temperature is 120 ℃, and the drying time is 8 h;
the sieve size is 20 meshes.
The beneficial effect of adopting the further scheme is that: the mud sand material that the above-mentioned scheme is less can be screened out to the size, gets rid of the too big mud sand material of size.
Further, the mass ratio of the solid B to the water in the step (3) is 1: 2;
the stirring speed is 800rpm, and the stirring time is 1 h;
the ball milling speed is 1400rpm, and the ball milling time is 20 min;
the mass ratio of the solid B to the solid A is 20: 0.8-1.
The beneficial effect of adopting the further scheme is that: the above scheme can further reduce the size of the screened silt material, is beneficial to increasing the reaction area and enables the reaction to be more sufficient.
Further, the water bath heating temperature in the step (4) is 80 ℃, and the water bath heating time is 10 hours.
The beneficial effect of adopting the further scheme is that: the composite iron remover and the silt material are fully reacted, so that insoluble iron in the silt material is converted into soluble iron to be dissolved out, and the content of Fe2O3 in the silt material is reduced.
Further, the centrifugation speed in the step (5) is 4000rpm, and the centrifugation time is 3min
The beneficial effect of adopting the further scheme is that: slurry formed by adding water into the silt has certain viscosity, and is not suitable for solid-liquid separation in a filtering mode, so that a centrifugal mode is adopted. At the end of centrifugation, the silt and sand material can be adhered to the tube wall of the centrifuge tube, and Fe2O3 in the centrifuge tube is dissolved in water by the iron removing agent, so that the separation of the silt and sand material and Fe2O3 can be realized by the clear liquid at the moment.
Further, in the step (6), the drying temperature is 120 ℃, and the drying time is 4 hours;
the sieve size is 20 meshes.
Further, the crystallization temperature in the step (7) is 80 ℃; the drying temperature is 60 ℃, and the drying time is 4 h.
The invention has the beneficial effects that: the invention can simultaneously generate iron removal effect on the ceramic muddy and sandy raw materials, thereby increasing the calcination whiteness of the ceramic muddy and sandy raw materials, improving the quality of the raw materials and leading the low-quality raw materials to be better applied to the ceramic industry; and the waste liquid generated by removing iron from the raw materials can be prepared into byproducts through simple treatment, so that the cost is reduced and the environment is protected. In addition, the invention has simple technical route, and the required equipment, instruments and conditions are easy to realize, thereby having certain practical value.
Drawings
FIG. 1 is a process flow chart of the iron-removing whitening method of the ceramic raw material provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the sand material A is potash feldspar, the mud material B is kaolin, the sand material C is potash albite, and the sand material D is aluminum sand.
Example 1
(1) Mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate according to the mass ratio of 4:5, and uniformly stirring to obtain a composite iron remover;
(2) selecting a certain sand material A, drying the sand material A for 8 hours at 120 ℃, crushing the sand material A, and sieving the crushed sand material A with a 20-mesh sieve to obtain a product A1;
(3) adding 400gA1 and 800g of water into a beaker, stirring for 1h at 800rpm, then ball-milling for 20min at 1400rpm until the suspension is uniform, then adding 32g of composite iron remover, and then heating in a constant-temperature water bath at 80 ℃ for 10h under the state of continuous stirring;
(4) after heating, centrifuging the suspension at 4000rpm for 3min to respectively obtain solid and liquid;
(5) drying the separated solid at 120 ℃ for 4h, crushing, and sieving with a 20-mesh sieve, wherein the obtained product is marked as 'A2';
(6) filtering the separated liquid, crystallizing at 80 deg.C, and drying at 60 deg.C for 4h to obtain dried solid A3.
Example 2
(1) Mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate according to the mass ratio of 4:5, and uniformly stirring to obtain a composite iron remover;
(2) selecting certain pug B, drying the pug B for 8 hours at 120 ℃, crushing the pug B, and sieving the pug B with a 20-mesh sieve, wherein the pug B is marked as 'B1';
(3) adding 300gB1 and 600g of water into a ball milling tank, stirring for 1h at 800rpm, then ball milling for 20min at 1400rpm until the suspension is uniform, transferring all the slurry into a beaker, adding 14g of composite iron remover, and then heating in a constant-temperature water bath at 80 ℃ for 10h under the state of continuous stirring;
(4) after heating, centrifuging the suspension for 3min at 4000rpm to respectively obtain solid and liquid;
(5) drying the separated solid at 120 ℃ for 4h, crushing, and sieving with a 20-mesh sieve, wherein the mark is 'B2';
(6) and filtering the separated liquid, crystallizing at 80 ℃, and drying at 60 ℃ for 4h, wherein the dried solid is marked as 'B3'.
Example 3
(1) Mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate according to the mass ratio of 4:5, and uniformly stirring to obtain a composite iron remover;
(2) selecting a certain sand material C, drying the sand material C for 8 hours at 120 ℃, crushing the sand material C, and sieving the crushed sand material C with a 20-mesh sieve, wherein the sand material C is marked as 'C1';
(3) adding 400g of C1 and 800g of water into a beaker, stirring for 1h at 800rpm, then ball-milling for 20min at 1400rpm until the suspension is uniform, then adding 18g of composite iron remover, and then heating in a constant-temperature water bath at 80 ℃ for 10h under the state of continuous stirring;
(4) after heating, centrifuging the suspension at 4000rpm for 3min to respectively obtain solid and liquid;
(5) drying the separated solid at 120 ℃ for 4h, crushing, and sieving with a 20-mesh sieve, wherein the obtained product is marked as 'C2';
(6) and filtering the separated liquid, crystallizing at 80 ℃, drying at 60 ℃ for 4 hours, and marking the dried solid as 'C3'.
Example 4
(1) Mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate according to the mass ratio of 4:5, and uniformly stirring to obtain a composite iron remover;
(2) selecting a certain sand material D, drying the sand material D at 120 ℃ for 8 hours, crushing the sand material D, and sieving the crushed sand material D with a 20-mesh sieve, wherein the D1 is marked;
(3) adding 300g of D1 and 600g of water into a beaker, stirring for 1h at 800rpm, then ball-milling for 20min at 1400rpm until the suspension is uniform, then adding 15g of composite iron remover, and then heating in a constant-temperature water bath at 80 ℃ for 10h under the state of continuous stirring;
(4) after heating, centrifuging the suspension at 4000rpm for 3min to respectively obtain a solid and a liquid;
(5) drying the separated solid at 120 ℃ for 4h, crushing, and sieving with a 20-mesh sieve, wherein the obtained product is marked as 'D2';
(6) and filtering the separated liquid, crystallizing at 80 ℃, and drying at 60 ℃ for 4h, wherein the dried solid is marked as D3.
A1, A2, B1, B2, C1, C2, D1 and D2 prepared in the above embodiments are all sent to a third-party detection mechanism, and chemical component routine nine items and detection of the whiteness degree are carried out according to detection standards GB/T21114-2019 and GB/T5950-2008. The results are shown in table 1:
TABLE 1 summary of chemical composition and whiteness test results
The detection result shows that for the sand material A, after iron removal treatment, the iron content is reduced from 1.95% to 0.66%, and the calcination whiteness is improved from 25.9 degrees to 64.4 degrees; for the pug B, after iron removal treatment, the iron content is reduced from 1.25% to 0.96%, and the calcination whiteness is improved from 61.1 degrees to 72.8 degrees; for the sand material C, after iron removal treatment, the iron content is reduced from 1.15% to 0.94%, and the calcination whiteness is improved from 23.2 degrees to 29.7 degrees; for the sand material D, after iron removal treatment, the iron content is reduced from 1.28% to 0.92%, and the calcination whiteness is improved from 79.6 ℃ to 81.1 ℃. In general, the method has better iron removing and whitening effects on pug and sand.
A3 prepared in the above examples and EDTA iron fertilizer 500 g/barrel produced by Shandong Lufeng Biotech Co., Ltd, no-type commercial iron fertilizer EDTA-Fe-Na.3H2And (D) sending the O (marked as M) to a third detection mechanism for detecting the iron content. The results are shown in Table 2
TABLE 2 results of measuring the iron content of the reaction product
| A3 | M | |
| Iron content | 13.30％ | 13.24％ |
According to the detection result of the third party, according to the detection standard NY/T1974-2010 of the water-soluble fertilizer, the iron content of the iron-removing byproduct A3 of the sand material A can reach 13.30%, the iron content of the commercial iron fertilizer M is 13.24%, and the difference between the iron content and the iron content is small. Therefore, the iron content of the by-product meets the commercial requirement, and can be applied to the field of iron fertilizers.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. An iron-removing and whitening method for ceramic raw materials is characterized by comprising the following steps:
(1) mixing ethylene diamine tetraacetic acid and disodium ethylene diamine tetraacetate dihydrate, and uniformly stirring to obtain solid A for later use;
(2) drying, crushing and sieving the ceramic sand-mud material to obtain solid B for later use;
(3) dispersing the solid B in water, stirring, ball-milling, and adding the solid A to obtain a liquid A;
(4) continuously stirring the liquid A, and heating the liquid A in a constant-temperature water bath;
(5) centrifuging the liquid A after the water bath heating is finished to obtain a solid C and a liquid B;
(6) drying, crushing and sieving the solid C to obtain a product solid D;
(7) and filtering, crystallizing and drying the liquid B to obtain a byproduct solid E.
2. The iron removal and whitening method for ceramic raw materials as claimed in claim 1, wherein the mass ratio of the ethylenediaminetetraacetic acid to the disodium ethylenediaminetetraacetate dihydrate in the step (1) is 4: 5.
3. The iron-removing and whitening method for the ceramic raw material as recited in claim 1, wherein the drying temperature in the step (2) is 120 ℃ and the drying time is 8 h;
the sieve size is 20 meshes.
4. The iron removal and whitening method for ceramic raw materials as claimed in claim 1, characterized in that the mass ratio of the solid B to the water in the step (3) is 1: 2;
the stirring speed is 800rpm, and the stirring time is 1 h;
the ball milling speed is 1400rpm, and the ball milling time is 20 min;
the mass ratio of the solid B to the solid A is 20: 0.8-1.
5. The iron removal and whitening method for ceramic raw materials as claimed in claim 1, wherein the water bath heating temperature in the step (4) is 80 ℃ and the water bath heating time is 10 h.
6. The iron and white removing method for ceramic raw material as claimed in claim 1, wherein said centrifugation speed in step (5) is 4000rpm and the centrifugation time is 3 min.
7. The iron-removing and whitening method for the ceramic raw material as recited in claim 1, wherein in the step (6), the drying temperature is 120 ℃, and the drying time is 4 hours;
the sieve size is 20 meshes.
8. The iron and white removing method for the ceramic raw material as claimed in claim 1, wherein the crystallization temperature in the step (7) is 80 ℃;
the drying temperature is 60 ℃, and the drying time is 4 h.
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Citations (6)
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Application publication date: 20220701 |