Functional unfired ceramsite as well as preparation method and use method thereof

Abstract

The invention relates to a functional non-sintered ceramsite and a preparation method and a use method thereof, the functional non-sintered ceramsite comprises 10-30% of aquatic product leftovers, 10-40% of a siliceous base material and 30-60% of gel, and the total percentage is 100%. The preparation method comprises the following steps: drying the aquatic product leftovers at low temperature, and crushing and grinding the aquatic product leftovers into powder; selecting a siliceous base material, and adding water into the siliceous base material to prepare slurry; selecting aquatic product leftover powder with one or more nutrient contents according to the nutrient content requirement of the ceramsite to be manufactured, proportioning to reach the required nutrient content, mixing with the slurry, adding dry powdery gel after mixing, and stirring the mixture to form a loose semi-dry material; the loose semi-dry material is conveyed to a disc machine to be subjected to balling treatment, and the functional unfired ceramsite is prepared after drying. The functional unfired ceramsite can be used for effectively recycling aquatic product leftovers, is used for improving planting soil, supplies nutrients to crops or plants and promotes the growth of the crops or plants.

Description

Technical Field

[0001] The invention relates to the field of ceramsite production and discloses functional unfired ceramsite and a preparation method and a use method thereof. Background Art

[0002] As the name suggests, ceramsite is a kind of ceramic particle. It is usually divided into construction ceramsite or biological ceramsite according to its function. Construction ceramsite is mainly used as a building material, while biological ceramsite mainly relies on the active substances in ceramsite to have a wide range of applications in environmental pollution control, soil improvement, etc. For example, the application publication number CN107517835A published in the Chinese patent literature, the application publication date is December 29, 2017, and the invention name is "A phosphogypsum ceramsite for soilless cultivation of tomato seedlings and its preparation method"; another example is the application publication number CN106905038A published in the Chinese patent literature, the application publication date is June 30, 2017, and the invention name is "A ceramsite suitable for the growth of Datura and its preparation method"; and there is also the authorization announcement number CN106747570B published in the Chinese patent literature, the authorization announcement date is June 14, 2019, and the invention name is "A blue-based sintered ceramsite with slow-release fertilizer effect". The above patent documents all disclose ceramsite related to crop growth. Ceramsite has the function of providing nutrients for crop growth, thereby improving crop growth and output. However, none of the above ceramsite preparation processes involve the use of aquatic product waste as a preparation process for functional ceramsite.

[0003] Existing aquatic waste primarily refers to waste left after fish and shrimp processing, such as heads, tails, viscera, wings, skins, scales, and bones. Typically, this waste is shipped to incinerators as garbage and disposed of effectively. However, this waste itself is rich in nutrients, including protein, calcium, collagen, and oil. Direct disposal is a significant waste of resources. Some manufacturers also use it as animal feed, but there are no other effective recycling options.

[0004] Therefore, based on the above problems, a method for preparing nutrient-free ceramsite using aquatic product waste as raw materials needs to be designed to recycle and reuse the existing aquatic product waste. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings, the present invention aims to provide a functional unfired ceramsite, its preparation method, and its use in the art, thereby resolving the technical problem that existing ceramsite and its preparation methods do not involve the use of aquatic product waste as raw material in the production and use of ceramsite. This objective is achieved through the following technical solution.

[0006] The invention discloses a functional unfired ceramsite, the main feature of which is that the functional unfired ceramsite contains 10-30% of aquatic product waste, 10-40% of siliceous base material, and 30-60% of gel, which is 100% in total.

[0007] The preparation method of the functional unfired ceramsite comprises preparing waste powder, preparing slurry and preparing the functional unfired ceramsite, and specifically comprises the following steps: step 1, drying aquatic product waste at a low temperature of 180-220 DEG C, crushing and grinding the aquatic product waste into 60-120 mesh powder after drying, testing the nutrient content, and marking and classifying the powder according to the nutrient content after testing; step 2, preparing slurry, selecting a siliceous base material, and adding the siliceous base material into water to prepare slurry; step 3, selecting aquatic product waste powder with one or more nutrient contents according to the nutrient content requirement of the ceramsite to be prepared, mixing the powder with the slurry, adding dry powder gel after mixing, and stirring the mixture to form a loose semi-dry material; step 4, conveying the loose semi-dry material to a disc machine for balling treatment, conveying the balled granular balls to a dryer for drying, and controlling the drying temperature at 100-300 DEG C. After drying, the functional unfired ceramsite is prepared.

[0008] The aquatic product scraps are the discarded parts after aquatic product processing.

[0009] The aquatic product scraps are any one or more combinations of heads, tails, viscera, wings, skins, scales and bones of fish and shrimps.

[0010] The siliceous base material is any one or more combinations of river silt, construction debris, fly ash, waterworks sludge, and sea mud.

[0011] The gel is any one or more combinations of calcium hydroxide, calcium carbonate, hemihydrate gypsum, and phosphogypsum.

[0012] Part or all of the waste powder prepared in step one is soaked in clean water for 5 to 8 hours. After soaking, the liquid and slag are separated, the liquid is tested for nutrient content, and the liquid is classified according to nutrient content and canned for use as a nutrient liquid tank; the slag part is combined with the remaining aquatic product waste powder and added to step three for mixing and stirring.

[0013] The functional unfired expanded clay is used as a soil improvement for planting. When the humidity is high, the expanded clay absorbs and retains water, and the nutrients in the expanded clay are dissolved in water. When the humidity is low, the water and nutrients are dispersed and supplied to the soil, replenishing nutrients for crops or plants and promoting their growth.

[0014] Beneficial effects of the present invention: 1. By using aquatic product waste as one of the raw materials for preparing expanded clay, the expanded clay produced has the function of nutrient supply. A considerable proportion of organic matter components are maintained in the expanded clay. As the nutrients in the expanded clay are supplied, that is, the organic matter in the expanded clay is lost, the expanded clay easily forms a porous structure, effectively absorbing, retaining and replenishing water. The water absorption rate reaches 48% (the water absorption rate of expanded clay fired at high temperature is only 10%), which improves the distribution of soil water quality and nutrients, and is beneficial to the absorption and growth of crops.

[0015] Second, the nutrient liquid tank produced can further assist in watering crops, making it easier for crops to absorb and grow, thereby improving the economic benefits of crops.

[0016] 3. It forms an effective resource recycling of aquatic product scraps, turning waste into treasure, reducing resource waste, improving economic value, and reducing waste disposal consumption, which is conducive to energy conservation and emission reduction and is in line with the direction of sustainable development.

[0017] 4. The production equipment investment of functional unfired expanded clay is small and the production cost is low. Compared with high-temperature roasted expanded clay, with the same scale of production capacity, the equipment investment is reduced by 75%, the cost is reduced by two-thirds, and the space is reduced by three-fifths. Implementation Method

[0018] The present invention is further described with reference to examples. In these examples, the aquatic waste materials involved in the functional unfired ceramsite are any one or more combinations of the heads, tails, viscera, wings, skins, scales, and bones of fish and shrimp; the siliceous base material is any one or more combinations of river silt, construction debris, fly ash, waterworks sludge, and marine mud; and the gel is any one or more combinations of calcium hydroxide, calcium carbonate, hemihydrate gypsum, and phosphogypsum.

[0019] In the first embodiment, the method for preparing the functional unfired ceramsite comprises the following steps: Step 1: Dry the aquatic product waste at a low temperature of 180-220°C. After drying, grind the aquatic product waste into a powder of 60-120 mesh and test the nutrient content. After testing, mark and classify the waste according to the nutrient content.

[0020] Step 2: Prepare slurry by selecting a siliceous base material and adding it to water to prepare a slurry.

[0021] Step three: according to the nutrient content requirements of the ceramsite to be produced, one or more aquatic product waste powders classified in step one are selected to achieve the required nutrient content, and mixed with the slurry. After mixing, dry powdered gel is added, and the mixture is stirred to form a loose semi-dry material.

[0022] Step 4: The loose semi-dry material is transported to a disc machine for ball processing, and the granular balls after balling are transported to a dryer for drying. The drying temperature is controlled at 100-300°C. After drying, functional unfired ceramsite is prepared, and the nutrient content of the nutrient ceramsite meets the required requirements.

[0023] In the second embodiment, the preparation method of the functional unfired ceramsite comprises the following steps: Step 1: Dry the aquatic product waste at a low temperature of 180-220°C, crush and grind the aquatic product waste into 60-120 mesh powder after drying, soak a portion of the waste powder in clean water for 5-8 hours, separate the liquid and slag after soaking, test the nutrient content of the liquid, and classify it according to nutrients and can it for use as a nutrient liquid tank; the slag part is used as an admixture, and the other portion of the waste powder is tested for nutrient content and marked and classified according to the nutrient content.

[0024] Step 2: Prepare slurry by selecting a siliceous base material and adding it to water to prepare a slurry.

[0025] Step three: According to the nutrient content requirements of the ceramsite to be produced, one or more aquatic product waste powders classified in step one are selected to achieve the required nutrient content, and mixed with the slag in step one and the slurry. After mixing, dry powdered gel is added, and the mixture is stirred to form a loose semi-dry material.

[0026] Step 4: The loose semi-dry material is conveyed to a disc machine for ball processing, and the granular balls after balling are conveyed to a dryer for drying. The drying temperature is controlled at 100-150° C. After drying, functional unfired ceramsite is prepared.

[0027] The unfired ceramsite finally prepared in the above-mentioned Example 1 and Example 2 has a pH value of 6-7, an organic matter content of 40-45%, a total nitrogen content of 3-5%, a phosphorus content of 1.5-2.2%, and a potassium content of 1.1-1.8%, which meets the nutrient content value of nutrient ceramsite.

[0028] The method of using the functional unfired ceramsite is as follows: the functional unfired ceramsite is used as a planting soil improvement. When the ceramsite is combined with the soil, it absorbs and retains water when the humidity is high, and the nutrients in the ceramsite are dissolved in water. When the humidity is low, the water and nutrients are dispersed and supplied to the soil, replenishing nutrients for crops or plants and promoting their growth.

Claims

1. A functional unfired ceramsite, characterized in that The functional unfired expanded clay contains 10-30% of aquatic product waste, 10-40% of siliceous base material, and 30-60% of gel, totaling 100%.

2. A method for preparing the functional unfired ceramsite according to claim 1, characterized in that The preparation method includes preparing waste powder, preparing slurry and preparing functional unfired ceramsite, specifically the following steps: Step 1: Dry the aquatic product waste at a low temperature of 180-220°C, grind the aquatic product waste into a powder of 60-120 mesh, and test the nutrient content. After testing, mark and classify according to the nutrient content; Step 2: Prepare slurry by selecting a siliceous base material and adding it to water to form a slurry; Step 3: According to the nutrient content requirements of the ceramsite to be produced, one or more aquatic product waste powders with the required nutrient content are selected and mixed with the slurry. After mixing, dry powdered gel is added and the mixture is stirred to form a loose semi-dry material; Step 4: The loose semi-dry material is conveyed to a disc machine for ball processing, and the granular balls after balling are conveyed to a dryer for drying operation. The drying temperature is controlled at 100-300°C. After drying, functional unfired ceramsite is prepared.

3. The method for preparing the functional unburned ceramsite according to claim 2, wherein The aquatic product scraps are the discarded parts after aquatic product processing.

4. The method for preparing the functional unfired ceramsite according to claim 3, wherein The aquatic product scraps are any one or more combinations of heads, tails, viscera, wings, skins, scales and bones of fish and shrimps.

5. The method for preparing the functional unfired ceramsite according to claim 2, wherein The siliceous base material is any one or more combinations of river silt, construction debris, fly ash, waterworks sludge, and sea mud.

6. The method for preparing the functional unfired ceramsite according to claim 2, wherein The gel is any one or more combinations of calcium hydroxide, calcium carbonate, hemihydrate gypsum, and phosphogypsum.

7. The method for preparing the functional unfired ceramsite according to claim 2, wherein Part or all of the aquatic product waste powder prepared in step one is soaked in clean water for 5 to 8 hours. After the soaking is completed, the liquid and slag are separated, the nutrient content of the liquid is tested, and the liquid is classified according to the nutrient content and canned for use as a nutrient liquid tank; the slag part is added to the remaining aquatic product waste powder in step three and mixed and stirred for use.

8. A method for using the functional unfired ceramsite according to claim 1, characterized in that This functional unfired expanded clay is used to improve planting soil. When the expanded clay is combined with the soil, when the humidity is high, the expanded clay absorbs and retains water, and dissolves the nutrients in the expanded clay in water; when the humidity is low, the water and nutrients are dispersed and supplied to the soil, replenishing nutrients for crops or plants and promoting their growth.