Bone powder prepared from phosphorus-containing sludge and method for preparing the same

Abstract

The present application relates to the technical field of bone powder prepared from phosphorus-containing sludge, in particular to bone powder prepared from phosphorus-containing sludge and a preparation method thereof.The bone powder prepared from phosphorus-containing sludge is prepared from the following raw materials in mass percentage: 85%-95% of phosphorus-containing sludge and 5%-15% of cooked talc.The phosphorus-containing sludge is high-concentration phosphorus-containing wastewater generated in the production process of food enterprises and is treated by hydrolysis acidification, anaerobic-anoxic-aerobic combined process.The present application utilizes a kind of treated phosphorus-containing sludge, utilizes the characteristics of cooked talc, such as strengthening, toughening, improving whiteness, and reducing sintering temperature, to prepare bone powder prepared from phosphorus-containing sludge, which has reasonable calcium-phosphorus ratio, less impurities, high whiteness, and the new type bone quality porcelain produced by using the bone powder prepared from phosphorus-containing sludge has high mechanical strength, high whiteness, transparent porcelain body, smooth glaze surface, and good thermal stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bone powder prepared from phosphorus-containing sludge, in particular to bone powder prepared from phosphorus-containing sludge and a preparation method thereof. BACKGROUND

[0002] Bone powder is the most important raw material in the production of bone china. At present, the sources of bone powder in the production of bone china mainly include two types, one is natural bone powder prepared from animal bones through degumming, pickling and calcination, and the other is synthetic bone powder prepared by chemical reaction of phosphoric acid and light calcium powder. Whether it is natural bone powder or synthetic bone powder, a large amount of acidic waste liquid and harmful gas will be generated in the production process, which needs to be treated professionally. Moreover, the production of animal bones is becoming less and less, and the production capacity of natural bone powder is also becoming less and less. Phosphoric acid is an important chemical raw material, and its production process requires a large amount of electric energy. Phosphoric acid has more important uses.

[0003] Food enterprises will produce high-concentration phosphorus-containing wastewater in the production process, mainly from the washing, soaking, stirring, cooking and other links in the food processing process, as well as the fermentation process of food waste. The phosphorus content in these wastewaters is high, and if they are directly discharged without treatment, they will cause serious pollution to the environment. The use of treated phosphorus-containing sludge to produce a kind of bone powder prepared from phosphorus-containing sludge is both waste utilization and resource saving, and can reduce energy consumption. SUMMARY

[0004] In view of the above deficiencies in the prior art, the present application aims to provide a bone powder prepared from phosphorus-containing sludge, which utilizes the calcium phosphate, calcium carbonate, sodium phosphate and other compounds contained therein, and utilizes the characteristics of the cooked talc, such as strengthening, toughening, improving whiteness and reducing sintering temperature, to prepare the bone powder prepared from phosphorus-containing sludge. The calcium to phosphorus ratio of the bone powder is reasonable, the impurities are few, and the whiteness is high. The new type of bone china produced by using the bone powder prepared from phosphorus-containing sludge has high mechanical strength, high whiteness, transparent porcelain body, smooth glaze surface and good thermal stability.

[0005] Another object of the present application is to provide a method for preparing bone powder from phosphorus-containing sludge, which is scientific, reasonable, easy to implement and ensures the product quality and qualification rate.

[0006] The present application is implemented by using the following technical solutions:

[0007] The bone powder prepared from phosphorus-containing sludge is prepared from the following raw materials in mass percentage: phosphorus-containing sludge 85% to 95%, and cooked talc 5% to 15%.

[0008] The chemical composition of the phosphorus-containing sludge is as follows: Ca3(PO4)2: 84 to 88 wt%, CaCO3: 4 to 8 wt%, Na3PO4: 4 to 7 wt%, and CaSO4: 1 to 3 wt%.

[0009] The chemical composition of the said cooked talc is: Al2O3: 0.6-1wt%, SiO2: 63-68wt%, CaO: 1.1-1.5wt%, MgO: 30-35wt%.

[0010] Preferably, the bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: phosphorus-containing sludge 85%, cooked talc 15%.

[0011] Preferably, the bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: phosphorus-containing sludge 87.5%, cooked talc 12.5%.

[0012] Preferably, the bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: phosphorus-containing sludge 90%, cooked talc 10%.

[0013] Preferably, the bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: phosphorus-containing sludge 92.5%, cooked talc 7.5%.

[0014] Preferably, the bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: phosphorus-containing sludge 95%, cooked talc 5%.

[0015] The said phosphorus-containing sludge mainly comprises calcium phosphate Ca3(PO4)2, calcium carbonate CaCO3, sodium phosphate Na3PO4 and other compounds, wherein the calcium phosphate Ca3(PO4)2 and the calcium carbonate CaCO3 are heated and decomposed into P2O5 and CaO, which are the main components of the bone powder, and the sodium phosphate Na3PO4 is heated and decomposed into sodium oxide Na2O, which can reduce the sintering temperature of the product. The bone powder prepared from the said phosphorus-containing sludge can replace the current natural bone powder and synthetic bone powder, can reduce the sintering temperature of the product, save energy, and produce new bone porcelain products, which can completely achieve the clear and transparent porcelain body and the smooth glaze surface.

[0016] The said cooked talc mainly comprises SiO2, CaO and MgO, wherein the SiO2 and CaO are the main components of the bone porcelain body, and the MgO can increase the strength of the porcelain body, improve the toughness and thermal stability of the product. The bone powder prepared from the said phosphorus-containing sludge can replace the current natural bone powder and synthetic bone powder, can reduce the sintering temperature of the product, and produce new bone porcelain products, which can not only maintain the clear and transparent porcelain body and the smooth glaze surface, but also increase the mechanical strength, whiteness and thermal stability of the product.

[0017] The said phosphorus-containing sludge is high-concentration phosphorus-containing wastewater generated in the production process of food enterprises, which is treated by MBR technology, precipitated in the effluent sedimentation tank, and separated.

[0018] The said cooked talc is fine Cixi cooked talc powder.

[0019] The preparation method of the bone powder prepared from the phosphorus-containing sludge comprises the following steps:

[0020] (1) drying the raw materials: drying the phosphorus-containing sludge, sieving the dried phosphorus-containing sludge to 250-325 meshes, and sieving the cooked talc powder to 250-325 meshes;

[0021] (2) quantitative weighing: quantitatively weighing the dried phosphorus-containing sludge and the cooked talc powder after step (1);

[0022] (3) uniformly mixing: uniformly mixing the dried phosphorus-containing sludge and the cooked talc powder after step (2) by using a mixer;

[0023] (4) molding: molding the mixed powder after step (3) by using a press to obtain a molded brick;

[0024] (5) drying: drying the molded brick obtained after step (4);

[0025] (6) high-temperature sintering: placing the dried molded brick after step (5) into a kiln to be sintered by high-temperature oxidation flame to obtain the bone powder.

[0026] In step (3), the mixing time is 20-60 min, and in step (4), the nominal pressure of the press is 4000-6000 KN.

[0027] In step (6), the sintering temperature is 1260-1300 DEG C, and the sintering time is 10-12 hours.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] (1) The phosphorus-containing sludge generated in the food production process is treated by MBR technology, and the calcium phosphate Ca3 (PO4) 2 and calcium carbonate CaCO3 contained in the sludge are decomposed into P2O5 and CaO by heating, which are the necessary chemical components of the bone powder, and the calcium-phosphorus ratio is reasonable, and the sodium phosphate Na3PO4 is decomposed into sodium oxide Na2O by heating, which can reduce the sintering temperature of the product. The new bone porcelain product produced by using the bone powder prepared from the phosphorus-containing sludge has a clear and transparent porcelain body and a smooth glaze. Compared with the existing natural bone powder and synthetic bone powder, the new bone porcelain product can not only save national resources and reduce energy consumption, but also reasonably utilize industrial waste, which is in line with the national policy.

[0030] (2) The MgO component contained in the cooked talc can increase the strength of the porcelain body, improve the toughness of the product, and improve the thermal stability of the product. The bone powder prepared from the phosphorus-containing sludge can replace the existing natural bone powder and synthetic bone powder, and the new bone porcelain product produced by using the bone powder has a clear and transparent porcelain body, a smooth glaze, increased mechanical strength, improved whiteness, and improved thermal stability.

[0031] (3) The preparation method provided by the application is scientific, reasonable, easy to implement, and ensures product quality and qualification rate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0033] The raw materials used in the embodiments are phosphorus-containing sludge and cooked talc, and the chemical composition (in percentage by weight) is shown in the following table:

[0034] Raw material name Al2O3 SiO2 Ca3(PO4)2 CaO MgO CaCO3 Na3PO4 CaSO4 Phosphorus-containing sludge - - 86.75 - - 6.29 5.52 1.44 Ground talc 0.71 64.54 - 1.19 33.56 - - -

[0035] Embodiment 1

[0036] The bone powder prepared from the phosphorus-containing sludge comprises the following raw materials in percentage by mass: 85% of phosphorus-containing sludge and 15% of cooked talc.

[0037] The preparation method of the bone powder prepared from the phosphorus-containing sludge comprises the following steps:

[0038] (1) Drying the raw materials: drying the phosphorus-containing sludge, sieving 250 meshes, and sieving the cooked talc powder to 250 meshes;

[0039] (2) Quantitative weighing: quantitatively weighing the dried phosphorus-containing sludge powder and the cooked talc powder after step (1);

[0040] (3) Mixing uniformly: mixing the weighed phosphorus-containing sludge powder and the cooked talc powder after step (2) uniformly by using a mixer, and the mixing time is 50 minutes;

[0041] (4) Pressing: pressing the uniformly mixed powder in step (3) to obtain a shaped brick by using a press machine, and the nominal pressure of the common brick press machine is 6000 KN;

[0042] (5) Drying: drying the shaped brick obtained in step (4);

[0043] (6) High-temperature sintering: placing the dried shaped brick after step (5) into a kiln to be sintered by high-temperature oxidation flame, fully oxidizing the compound, and the sintering temperature is 1300℃, and the sintering period is 12 hours, to obtain the bone powder prepared from the phosphorus-containing sludge.

[0044] Embodiment 2

[0045] The bone powder prepared from phosphorus-containing sludge comprises the following raw materials in percentage by mass: 87.5% of phosphorus-containing sludge and 12.5% of cooked talc.

[0046] The preparation method of the bone powder prepared from phosphorus-containing sludge comprises the following steps:

[0047] (1) drying the raw materials: drying the phosphorus-containing sludge, sieving it through a 275-mesh sieve, and sieving the cooked talc through a 275-mesh sieve;

[0048] (2) quantitative weighing: quantitatively weighing the dried phosphorus-containing sludge powder and the cooked talc powder obtained in step (1);

[0049] (3) uniformly mixing: uniformly mixing the phosphorus-containing sludge powder and the cooked talc powder weighed in step (2) by using a mixer, and the mixing time is 20 minutes;

[0050] (4) molding: molding the mixed powder obtained in step (3) by using a press to obtain molded bricks, and the nominal pressure of the common brick press is 5500 KN;

[0051] (5) drying: drying the molded bricks obtained in step (4);

[0052] (6) high-temperature sintering: placing the dried molded bricks obtained in step (5) into a kiln to be sintered by high-temperature oxidation flame, fully oxidizing the compounds, and the sintering temperature is 1290℃, and the sintering period is 11.5 hours, thereby obtaining the bone powder prepared from phosphorus-containing sludge.

[0053] Example 3

[0054] The bone powder prepared from phosphorus-containing sludge comprises the following raw materials in percentage by mass: 87.5% of phosphorus-containing sludge and 12.5% of cooked talc.

[0055] The preparation method of the bone powder prepared from phosphorus-containing sludge comprises the following steps:

[0056] (1) drying the raw materials: drying the phosphorus-containing sludge, sieving it through a 275-mesh sieve, and sieving the cooked talc through a 275-mesh sieve;

[0057] (2) quantitative weighing: quantitatively weighing the dried phosphorus-containing sludge powder and the cooked talc powder obtained in step (1);

[0058] (3) uniformly mixing: uniformly mixing the phosphorus-containing sludge powder and the cooked talc powder weighed in step (2) by using a mixer, and the mixing time is 20 minutes;

[0059] (4) molding: molding the mixed powder obtained in step (3) by using a press to obtain molded bricks, and the nominal pressure of the common brick press is 5500 KN;

[0060] (5) drying: drying the molded bricks obtained in step (4);

[0061] (6) High temperature sintering: put the shaped bricks after drying in step (5) into a kiln to be sintered by high temperature oxidation flame, and the compounds are fully oxidized, the sintering temperature is 1280℃, and the sintering period is 11 hours, to obtain the bone powder prepared from phosphorus-containing sludge.

[0062] Example 4

[0063] The bone powder prepared from phosphorus-containing sludge comprises the following raw materials in mass percentage: phosphorus-containing sludge 92.5%, and cooked talc 7.5%.

[0064] The bone powder prepared from phosphorus-containing sludge is prepared by the following steps:

[0065] (1) Drying raw materials: dry the phosphorus-containing sludge, and sieve the cooked talc to 275 meshes, for preparation;

[0066] (2) Quantitative weighing: quantitatively weigh the dried phosphorus-containing sludge powder and the cooked talc powder after step (1);

[0067] (3) Mixing uniformly: mix the weighed phosphorus-containing sludge powder and the cooked talc powder after step (2) uniformly by a mixer, and the mixing time is 40 minutes;

[0068] (4) Shaping: shape the mixed powder after step (3) by a press to obtain shaped bricks, and the nominal pressure of the common brick press is 4500KN;

[0069] (5) Drying: dry the shaped bricks obtained in step (4);

[0070] (6) High temperature sintering: put the shaped bricks after drying in step (5) into a kiln to be sintered by high temperature oxidation flame, and the compounds are fully oxidized, the sintering temperature is 1270℃, and the sintering period is 10.5 hours, to obtain the bone powder prepared from phosphorus-containing sludge.

[0071] Example 5

[0072] The new bone powder comprises the following raw materials in mass percentage: phosphorus-containing sludge 95%, and cooked talc 5%.

[0073] The new bone powder is prepared by the following steps:

[0074] (1) Drying raw materials: dry the phosphorus-containing sludge, and sieve the cooked talc to 250 meshes, for preparation;

[0075] (2) Quantitative weighing: quantitatively weigh the dried phosphorus-containing sludge powder and the cooked talc powder after step (1);

[0076] (3) Mix evenly; the phosphorus sludge dry powder weighed in step (2) and the ground talc are mixed evenly by a mixer for 30 minutes;

[0077] (4) Molding: the powder mixed evenly in step (3) is pressed by a press to obtain the molded brick, and a common brick press with a nominal pressure of 4000 KN is used;

[0078] (5) Drying: the molded brick obtained in step (4) is dried;

[0079] (6) High-temperature sintering: the dried molded brick in step (5) is put into a kiln for high-temperature oxidation sintering, and the compound is fully oxidized, the sintering temperature is 1260 ℃, and the sintering period is 10 hours, thereby obtaining the new bone powder.

[0080] The chemical compositions of the bone powders prepared from the phosphorus sludge in each example are shown in the following table (in percentage by weight):

[0081] Example Al2O3 SiO2 Na2O CaO MgO P2O5 Total Ca / P Example 1 0.11 9.99 2.75 45.01 5.19 36.97 100.02 54.9 / 45.1 Example 2 0.09 8.33 2.83 46.32 4.33 38.06 99.96 54.9 / 45.1 Example 3 0.07 6.67 2.91 47.75 3.45 39.19 100.04 54.9 / 45.1 Example 4 0.05 5.01 2.99 49.02 2.61 40.31 99.99 54.88 / 45.12 Example 5 0.04 3.34 3.01 50.35 1.73 41.44 99.91 54.85 / 45.15

[0082] The new bone quality ceramic products are prepared from the bone powders prepared from the phosphorus sludge in examples 1-5

[0083] The five kinds of bone powders prepared from the phosphorus sludge in examples 1-5 are applied to the bone quality ceramic formula, the bone powder prepared from the phosphorus sludge is used to replace the natural bone powder in equal amount, the same production process and process flow as the bone quality ceramic are adopted, the sintering temperature is 1270 ℃, which is 10 ℃ lower than that of the bone quality ceramic product, and five kinds of new bone quality ceramic products are prepared.

[0084] The five kinds of new bone quality ceramic products adopt the same formula, and the mass percentage is: bone powder prepared from phosphorus sludge 44%, crystal stone 26%, potassium feldspar 12%, Longyan soil 16%, and spodumene 2%, wherein the bone powder prepared from the phosphorus sludge is respectively prepared from the bone powders prepared from the phosphorus sludge in examples 1-5.

[0085] The five kinds of new bone quality ceramic products adopt the same production process flow:

[0086] (1) Quantitative weighing: the 325-mesh bone powder prepared from the phosphorus sludge, 200-mesh crystal stone, 200-mesh potassium feldspar, 325-mesh Longyan soil, and 200-mesh spodumene are respectively weighed quantitatively;

[0087] (2) Preparation of slurry: the various raw materials weighed in step (1) are mixed according to a material-water ratio of 1:1, and are fed into a 5-ton ball mill for fine grinding for 16 hours until the slurry passes through a 325-mesh sieve, and is discharged from the mill to prepare the slurry;

[0088] (3) Preparation of mud strip: the bone quality ceramic slurry prepared in step (2) is kneaded into a mud strip through the processes of mud filtration and mud refining, and the water content of the mud strip is 22% for rolling and molding;

[0089] (4) Preparation of slurry for slip casting: the clay strip prepared in step (3) is beaten into slurry by high-speed stirring, and the slurry has a specific gravity of 1.65, for slip casting;

[0090] (5) Molding: cup, plate and bowl products are molded by rolling, and pot, sugar bowl and vase products are molded by slip casting;

[0091] (6) Drying of the green body: the semi-finished product prepared in step (5) is dried to obtain a semi-finished product;

[0092] (7) High-temperature biscuit firing: the semi-finished product dried in step (6) is placed in a 6-cubic-meter shuttle kiln for oxidation firing, the firing temperature is 1270°C, and the firing period is 8 hours, to obtain a biscuit;

[0093] (8) Polishing and drying of the biscuit: the biscuit prepared in step (7) is polished and dried;

[0094] (9) Glazing: the dried biscuit in step (8) is sprayed with a frit glaze having a specific gravity of 1.95 to obtain a glazed body;

[0095] (10) Low-temperature glaze firing: the glazed body prepared in step (9) is placed in a 6-cubic-meter shuttle kiln for oxidation firing, the firing temperature is 1150°C, and the firing period is 5 hours, to obtain a new type of bone china product.

[0096] Comparative Example 1

[0097] Production of traditional bone china products using natural bone powder

[0098] The same production process flow is used to produce a new type of bone china product using natural bone powder and bone powder prepared from phosphorus-containing sludge, the firing temperature is 1280°C, and a traditional bone china product is obtained.

[0099] The traditional bone china formula has a mass percentage of: natural bone powder 44%, crystal stone 26%, potassium feldspar 12%, Longyan soil 16%, and spodumene 2%.

[0100] Production process flow:

[0101] (1) Quantitative weighing: 325-mesh natural bone powder, 200-mesh crystal stone, 200-mesh potassium feldspar, 325-mesh Longyan soil, and 200-mesh spodumene are weighed quantitatively;

[0102] (2) Preparation of slurry: the weighed raw materials in step (1) are mixed according to a material-to-water ratio of 1:1, and are fed into a 5-ton ball mill for fine grinding for 16 hours, until the slurry passes through a 325-mesh sieve, and is discharged from the mill to form a slurry;

[0103] (3) Mud preparation: the mud prepared in step (2) is kneaded into mud strips through mud filtering and mud refining process, the moisture of the mud strips is 22%, for rolling forming;

[0104] (4) Preparation of grouting mud: the mud strips prepared in step (3) are grouted through high-speed stirring, to prepare mud with a specific gravity of 1.65, for grouting forming;

[0105] (5) Forming: cup, plate and bowl products are formed by rolling, and pot, sugar and milk jar and vase products are formed by grouting;

[0106] (6) Green body drying: the semi-finished product prepared in step (5) is dried to prepare a semi-finished product;

[0107] (7) High-temperature body firing: the semi-finished product dried in step (6) is put into a 6 cubic meter shuttle kiln for oxidation flame firing, the firing temperature is 1280℃, the firing period is 8 hours, to prepare a body firing green body;

[0108] (8) Body firing green body polishing and drying: the body firing green body prepared in step (7) is polished and dried;

[0109] (9) Glaze spraying: the body firing green body dried in step (8) is sprayed with a frit glaze with a specific gravity of 1.95, to prepare a glaze body;

[0110] (10) Low-temperature glaze firing: the glaze body prepared in step (9) is put into a 6 cubic meter shuttle kiln for oxidation flame firing, the firing temperature is 1150℃, the firing period is 5 hours, to prepare a traditional bone china product.

[0111] According to the national standard "Bone China" (GB / T13522-2008), the new bone china products of examples 1-5 and the traditional bone china product of comparative example 1 are respectively tested for product performance by using the existing national ceramic detection standards and methods, and the data are shown in the following table:

[0112]

[0113] From the experimental data of the above table, it can be seen that the new bone china products produced by the bone powder prepared from the phosphorus-containing sludge of examples 1-5 have better performance indexes than the traditional bone china products produced by natural bone powder. The new bone china products produced by the bone powder prepared from the phosphorus-containing sludge of examples 1 and 2 have better whiteness, bending strength and thermal stability, and the porcelain body is dense, semi-transparent or transparent, and has good appearance quality. The new bone china products produced by the bone powder prepared from the phosphorus-containing sludge of example 3 have slightly worse whiteness and bending strength, but have good thermal stability, and the porcelain body is dense, clear and transparent, and has the best appearance quality. The new bone china products produced by the bone powder prepared from the phosphorus-containing sludge of examples 4 and 5 have slightly worse whiteness and bending strength, and have lower thermal stability, and the porcelain body is dense, transparent, has fine pinholes on the surface, and has slightly worse appearance quality. In summary, the above performance comparison, production process control and production cost comparison show that example 3 is the best, and therefore has good popularization value.

[0114] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be subject to many changes, modifications, substitutions and variations without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. Bone meal prepared from phosphorus-containing sludge, characterized in that, The phosphorus-containing sludge is prepared from the following raw materials in percentage by mass: 85%-95% of phosphorus-containing sludge, and 5%-15% of cooked talc; The chemical composition of the phosphorus-containing sludge is as follows: Ca3(PO4)2: 84-88wt%, CaCO3: 4-8wt%, Na3PO4: 4-7wt%, and CaSO4: 1-3wt%; The chemical composition of the cooked talc is as follows: Al2O3: 0.6-1wt%, SiO2: 63-68wt%, CaO: 1.1-1.5wt%, and MgO: 30-35wt%; The preparation method of the bone powder prepared from the phosphorus-containing sludge comprises the following steps: (1) drying and preparing materials: drying the phosphorus-containing sludge, sieving, and preparing materials; (2) quantitatively weighing: quantitatively weighing the dried phosphorus-containing sludge powder and the cooked talc powder obtained in step (1); (3) uniformly mixing: uniformly mixing the phosphorus-containing sludge powder and the cooked talc powder obtained in step (2) by using a mixer; (4) molding: molding the uniformly mixed powder obtained in step (3) by using a molding machine to obtain molded bricks; (5) drying: drying the molded bricks obtained in step (4); (6) high-temperature sintering: placing the dried molded bricks obtained in step (5) into a kiln to be sintered by high-temperature oxidation flame to obtain bone powder. In step (6), the sintering temperature is 1260-1300℃, and the sintering time is 10-12 hours.

2. Bone powder prepared from phosphorus-containing sludge according to claim 1, characterized in that, The phosphorus-containing sludge is high-concentration phosphorus-containing wastewater generated in the production process of food enterprises and is separated after being treated by MBR technology.

3. Bone powder prepared from phosphorus-containing sludge according to claim 1, characterized in that, The cooked talc is fine Cixia cooked talc powder.

4. A method for the production of bone meal from phosphorus-containing sludge according to any one of claims 1 to 3, characterized in that The preparation method comprises the following steps: (1) drying and preparing materials: drying the phosphorus-containing sludge, sieving to 250-325 mesh, and sieving the cooked talc powder to 250-325 mesh, and preparing materials; (2) quantitatively weighing: quantitatively weighing the dried phosphorus-containing sludge powder and the cooked talc powder obtained in step (1); (3) uniformly mixing: uniformly mixing the phosphorus-containing sludge powder and the cooked talc powder obtained in step (2) by using a mixer; (4) molding: molding the uniformly mixed powder obtained in step (3) by using a molding machine to obtain molded bricks; (5) drying: drying the molded bricks obtained in step (4); (6) high-temperature sintering: placing the dried molded bricks obtained in step (5) into a kiln to be sintered by high-temperature oxidation flame to obtain bone powder.

5. The production method according to claim 4, characterized by, The fineness of the phosphorus-containing sludge and the cooked talc powder is 250-325 mesh.

6. The preparation method according to claim 4, characterized in that, In step (3), the mixing time is 20-60 minutes, and in step (4), the nominal pressure of the molding machine is 4000-6000KN.

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