Preparation method of artificial oven subsoil

Abstract

The invention provides a preparation method of artificial oven subsoil. The preparation method comprises the following steps: firstly, mixing shrub ash, rice hull ash and wormwood ash in proportion to prepare plant ash, then mixing calcined and crushed oyster shells and plant ash, adding water, washing and removing impurities to prepare mortar, and then adding loess powder for injection molding; drying at the temperature of 250-350 DEG C, oxidizing at the temperature of 450-650 DEG C and reducing at the temperature of 750-850 DEG C to finally obtain the artificial oven subsoil. According to the method, the natural production process of traditional oven subsoil is simulated, the compound structure and effective component composition of the natural oven subsoil are successfully reproduced, the obtained product is stable in component and quality, the content of heavy metal and pesticide residues meets the safety standard, and the problems that natural resources are exhausted, and the quality of the oven subsoil all over the country is uneven are effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of Chinese medicinal materials, and in particular to a method for preparing artificial stove core soil. Background Art

[0002] Stove heart soil, also known as Fulonggan, is a silicate mineral medicine containing primarily inorganic silicate compounds and various trace elements. It is obtained by scraping off the charred black surface of a stove after long-term firewood calcination with a knife. Reddish-brown is preferred. It has the effects of warming the middle and relieving adverse reactions, as well as stopping vomiting and bleeding. Its clinical use has been around for over 2,000 years. However, traditional or natural stove heart soil, derived from the scorched earth on the inner wall or substrate of a firewood kiln after years of fumigation, faces three major challenges in its preparation and acquisition: 1. Resource depletion: Urbanization has led to the near disappearance of wood stoves, and the source of natural stove core soil has almost been cut off; 2. Quality control is out of control: Remaining agricultural stoves are used to burn crop straw containing pesticide residues, causing heavy metals and pesticides to accumulate in the soil at the heart of the stoves, resulting in an extremely low pass rate for medicinal material processing. 3. Inconsistent quality standards across the country: There are multiple local standards for stove core soil across the country, and there is no national unified quality standard, which leads to chaotic and uneven quality, seriously affecting the efficacy of the medicinal materials.

[0003] Attempts to simulate the formation of hearth soil using modern technology have been made, but these methods suffer from significant drawbacks. The single calcination method is limited: the existing process uses direct high-temperature calcination of loess. While this method can be industrialized, it ignores the core formation mechanism of traditional hearth soil—the long-term, low-temperature interaction between organic ash and clay. This results in a lack of active ingredients in the product (e.g., insufficient calcium salts and differences in silicate morphology). It also suffers from insufficient component reduction: simple loess calcination cannot reproduce trace elements such as potassium and phosphorus found in firewood ash, nor can it reproduce the volatile components of medicinal plants like mugwort, thus affecting the efficacy of warming and antiemetic drugs. The process is also rather crude: precise control of the oxidation-reduction state transition during calcination is lacking, resulting in poor product uniformity. Therefore, it is necessary to develop an artificial preparation method that integrates organic ash compounding and multi-stage thermal reaction regulation to simulate the formation mechanism of traditional hearth soil and achieve industrial production with controllable composition, stable quality, and pollution-free performance. Summary of the Invention

[0004] In view of this, the present invention provides a method for preparing artificial hearth soil. This method not only solves the depletion of natural hearth soil resources, but also produces hearth soil with stable quality, improved efficacy, safety and reliability, and can ensure a long-term, stable and low-cost supply of raw medicinal materials.

[0005] In a first aspect of the present disclosure, the present disclosure provides a method for preparing wood ash, which comprises the following steps: S101, preparation of shrub ash, taking dry shrub stems, selecting clean and mildew-free ones, and sending them into a natural combustion furnace for full and complete combustion to obtain shrub ash; S102, preparation of rice husk ash, taking dry rice husks, selecting clean and mildew-free ones, sending them into a natural combustion furnace for full and complete combustion, thereby obtaining rice husk ash; S103, preparation of wormwood ash, taking dried wormwood, selecting clean and mildew-free wormwood, sending it into a natural combustion furnace for full and complete combustion, and obtaining wormwood ash; S104, preparation of wood ash: according to the weight ratio, the shrub ash obtained in S101, the rice husk ash obtained in S102, and the mugwort ash obtained in S103 are evenly mixed in a ratio of 10:10 to 1:5 to 1, and passed through a 20-mesh sieve to obtain wood ash.

[0006] In some optional embodiments of the present disclosure, in step S104, the medicinal component composition of the wood ash is an optimized combination of shrub ash, rice husk ash and mugwort ash in a ratio of 6:3:1 based on the weight ratio.

[0007] In a second aspect of the present disclosure, the present disclosure provides a method for preparing calcined oyster shells, which comprises the following steps: S201, picking out clean oyster shells without rotting flesh or odor, placing them in a calcining furnace, raising the temperature to 200-350°C (for example, 200, 250, 300, 350°C), and calcining for 3-5 hours (for example, 3, 4, 5 hours); S202, taking out the oyster shells from the calcining furnace, putting them into a grinder, crushing them, passing them through a 20-mesh sieve, removing the residue and leaving the ash powder to obtain calcined oyster shells.

[0008] In a third aspect of the present disclosure, the present disclosure provides a method for preparing artificial stove core soil, which comprises, in a first aspect, wood ash and, in a second aspect, calcined oyster shells, and the steps are as follows: S301, Preparation of Mortar: Mix the wood ash obtained in S104 and the calcined oyster shells obtained in S202 in a weight ratio of 10:5-1, place in a roller mixer, add 5-10 times the weight of the mixed ash (for example, 5, 6, 7, 8, 9, 10 times) of purified water, and stir for 15 minutes. After the mixture has settled, use a dense mesh to clean the surface of the mortar to remove debris and grease. Repeat this cleaning process 3-5 times (for example, 3, 4, 5 times) to obtain the mortar. S302, preparation of loess powder, taking clean and uncontaminated loess, crushing it, passing it through a 20-mesh sieve, and removing sand and gravel to obtain loess powder; S303, preparing an artificial stove core soil embryo, slowly adding the loess powder obtained in S302 to the mortar (i.e., the sum of the weights of wood ash and calcined oyster shells mixed in proportion) in a weight ratio of 100:15-1 to the solids in the mortar obtained in S301, stirring evenly in a mixer, and then pouring the mixture into a crucible mold to obtain an artificial stove core soil embryo; S304, drying the artificial stove core soil embryo. The artificial stove core soil embryo obtained in S303 is moved into a calcining furnace, and the temperature is slowly raised to 250-350° C. (for example, 250, 300, 350° C.) by powering on. The temperature is kept at this temperature for 2-6 hours (for example, 2, 3, 4, 5, 6 hours) to obtain a dried artificial stove core soil embryo. S305, slowly heating the dried artificial stove core soil obtained in S304 to 450-650° C. (e.g., 450, 500, 550, 600, 650° C.) in a calcining furnace, and keeping the temperature for 4-10 hours (e.g., 4, 5, 6, 7, 8, 10 hours) to obtain oxidized artificial stove core soil; S306, slowly heating the oxidized artificial stove core soil obtained in S305 to 750-850° C. (e.g., 750, 800, 850° C.) in a calcining furnace, and keeping the temperature for 4-10 hours (e.g., 4, 5, 6, 7, 8, 10 hours) to obtain a reduced artificial stove core soil; S307. The artificial stove core soil embryo restored in S306 is naturally cooled and subjected to quality inspection to obtain the artificial stove core soil. In some optional embodiments of the present disclosure, in step S307, the medicinal component combination of the artificial stove core soil, loess, shrub ash, rice husk ash, mugwort ash, and oyster shell is optimized in a ratio of 100:5:3:1:1.

[0009] The loess described in S302 includes general loess, loess soil, and clay loess, and has a pH value of 6.0 to 8.5. Its water sensitivity has been tested by the TRIM test. The dehumidification path parameter αᵈ should be in the range of 0.01 to 0.05 kPa⁻¹, and the moisture absorption path parameter αʷ should be in the range of 0.03 to 0.10 kPa⁻¹.

[0010] In summary, the present disclosure has the following beneficial effects: First, through the comparison of the components as shown in Table 1 below, the artificial stove core soil of the present invention is basically the same as the natural stove core soil. From this aspect, it can be proved that the present invention can completely replace the natural stove core soil, which is already a very scarce resource.

[0011] .

[0012] On the other hand, the present disclosure (product) was tested on a control test of antidiarrheal effects on a mouse diarrhea model induced by an aqueous extract of senna leaves, and the effect was more significant than that of natural hearth soil. The control test set up four model groups, with drug administration 10 days after modeling and ended 18 days later. The test results are shown in Table 2 below. The results indicate that artificial hearth soil has a better antidiarrheal effect on mice with spleen deficiency diarrhea, while loess has no significant antidiarrheal effect.

[0013] Table 2. .

[0014] It can be seen that the effect of the present disclosure is better than that of natural stove core soil. DETAILED DESCRIPTION

[0015] The present disclosure is further described in detail below with reference to the embodiments.

[0016] Preparation of wood ash S401, taking dry shrub stems, selecting clean and mildew-free ones, and sending them into a natural combustion furnace for full and complete combustion to obtain shrub ash; S402, taking dry rice husks, selecting clean and mildew-free ones, and sending them into a natural combustion furnace for full and complete combustion to obtain rice husk ash; S403, taking dried mugwort, selecting clean and mildew-free ones and sending them into a natural combustion furnace for full and complete combustion to obtain mugwort ash; S404. According to the weight ratio, take 5 parts of shrub ash obtained in S401, 3 parts of rice husk ash obtained in S402, and 1 part of mugwort ash obtained in S403 and mix them evenly to obtain wood ash.

[0017] Preparation of calcined oyster shell S501, picking out clean oyster shells without rotting flesh or odor, placing them in a calcining furnace, heating them to 350°C, and calcining them for 5 hours; S502, taking out the oyster shells from the calcining furnace, putting them into a grinder, crushing them, passing them through a 20-mesh sieve, removing the residue and leaving the ash powder to obtain calcined oyster shells.

[0018] Preparation of stove core soil S601, according to the weight ratio, take 14 parts of the wood ash obtained in S404 and 1 part of the calcined oyster shell obtained in S502 and put them into a roller mixer, then add 120 parts of pure water by mass, start the mixer and stir for 15 minutes. After standing, use a dense mesh to wash away the debris and grease on the surface of the slurry. Repeat this washing process 3 times to obtain a slurry; S602, taking clean and unpolluted loess, crushing it, passing it through a 20-mesh sieve, and removing sand and gravel to obtain loess powder; S603, take 100 parts by weight of the loess powder obtained in S602, slowly add it to the mortar obtained in S601, start the mixer to stir evenly, and then inject it into the crucible mold to obtain the stove core soil embryo; S604, move the stove core soil embryo obtained in S603 into a calcining furnace, apply power and slowly raise the temperature to 350°C, and keep the temperature for 4 hours to obtain a dried stove core soil embryo; S605, slowly heating the dried stove core soil obtained in S604 to 650° C. in a calcining furnace and keeping the temperature for 6 hours to obtain an oxidized stove core soil; S606, slowly heating the oxidized stove core soil obtained in S605 to 850° C. in the calcining furnace and keeping the temperature for 5 hours to obtain a reduced stove core soil; S607. After the stove core soil embryo is reduced in S606, the calcining furnace is powered off, the soil is cooled naturally, and quality inspection is performed to obtain the artificial stove core soil.

[0019] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the core technology and essence of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A method for preparing artificial stove core soil, characterized in that: The following steps are involved: S301, Preparation of Mortar: Mix the wood ash obtained in S104 and the calcined oyster shells obtained in S202 in a weight ratio of 10:5-1, place in a roller mixer, add 5-10 times the weight of the mixed ash (for example, 5, 6, 7, 8, 9, 10 times) of purified water, and stir for 15 minutes. After the mixture has settled, use a dense mesh to clean the surface of the mortar to remove debris and grease. Repeat this cleaning process 3-5 times (for example, 3, 4, 5 times) to obtain the mortar. S302, preparation of loess powder, taking clean and unpolluted loess, crushing it, passing it through a 20-mesh sieve, and removing sand and gravel to obtain loess powder; S303, preparing an artificial stove core soil embryo, slowly adding the loess powder obtained in S302 to the mortar (i.e., the sum of the weights of wood ash and calcined oyster shells mixed in proportion) in a weight ratio of 100:15-1 to the solids in the mortar obtained in S301, stirring evenly in a mixer, and then pouring the mixture into a crucible mold to obtain an artificial stove core soil embryo; S304, drying the artificial stove core soil embryo. The artificial stove core soil embryo obtained in S303 is moved into a calcining furnace, and the temperature is slowly raised to 250-350° C. (for example, 250, 300, 350° C.) by powering on. The temperature is kept at this temperature for 2-6 hours (for example, 2, 3, 4, 5, 6 hours) to obtain a dried artificial stove core soil embryo. S305, slowly heating the dried artificial stove core soil obtained in S304 to 450-650° C. (e.g., 450, 500, 550, 600, 650° C.) in a calcining furnace, and keeping the temperature for 4-10 hours (e.g., 4, 5, 6, 7, 8, 10 hours) to obtain oxidized artificial stove core soil; S306, slowly heating the oxidized artificial stove core soil obtained in S305 to 750-850° C. (e.g., 750, 800, 850° C.) in a calcining furnace, and keeping the temperature for 4-10 hours (e.g., 4, 5, 6, 7, 8, 10 hours) to obtain a reduced artificial stove core soil; S307. The artificial stove core soil embryo restored in S306 is naturally cooled and subjected to quality inspection to obtain the artificial stove core soil.

2. The preparation method according to claim 1, characterized in that In step S101, the plant ash obtained in step S104 comprises the following steps: S101, preparation of shrub ash, taking dry shrub stems, selecting clean and mildew-free ones, and sending them into a natural combustion furnace for full and complete combustion to obtain shrub ash; S102, preparation of rice husk ash, taking dry rice husks, selecting clean and mildew-free ones, sending them into a natural combustion furnace for full and complete combustion, thereby obtaining rice husk ash; S103, preparation of wormwood ash, taking dried wormwood, selecting clean and mildew-free wormwood, sending it into a natural combustion furnace for full and complete combustion, and obtaining wormwood ash; S104, preparation of wood ash: according to the weight ratio, the shrub ash obtained in S101, the rice husk ash obtained in S102, and the mugwort ash obtained in S103 are evenly mixed in a ratio of 10:10 to 1:5 to 1, and passed through a 20-mesh sieve to obtain wood ash.

3. The preparation method according to claim 1, characterized in that In step S101, the calcined oyster shells obtained in step S202 include the following steps: S201, picking out clean oyster shells without rotting flesh or odor, placing them in a calcining furnace, raising the temperature to 200-350°C (for example, 200, 250, 300, 350°C), and calcining for 3-5 hours (for example, 3, 4, 5 hours); S202, taking out the oyster shells from the calcining furnace, putting them into a grinder, crushing them, passing them through a 20-mesh sieve, removing the residue and leaving the ash powder to obtain calcined oyster shells.

4. An artificial stove core soil, characterized in that: The artificial stove core soil as claimed in claim 1 is composed of five components: loess, shrub ash, rice husk ash, mugwort ash, and calcined oyster shells; According to weight ratio, 100 parts of loess, 1-9 parts of shrub ash, 0.5-7 parts of rice husk ash, 0.1-5 parts of mugwort ash, and 0.1-5 parts of oyster shell.

5. The artificial stove core soil according to claim 4, characterized in that: The loess component of the artificial stove core soil includes one, two, or three of general loess, loess soil, and clay loess.