A silicon ore activation method and its application

Abstract

The invention discloses a silicon ore activation method and application thereof; the invention belongs to the technical field of silicon ore, and the invention significantly improves the activity of silicon ore by reasonably selecting an activating agent and optimizing calcination and cooling processes, so that the activity of silicon ore can better meet the needs of various industrial applications; the rotary kiln calcination process can realize continuous production, improve production efficiency and reduce production costs; high-temperature rapid cooling treatment effectively fixes the high-activity structure of silicon ore and ensures the stability of product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of silicon ore, and specifically refers to a silicon ore activation method and application thereof. Background Art

[0002] With the continuous development of agriculture and animal husbandry, the performance requirements for fertilizers and feed additives are increasing. As an element that plays a potentially important role in the growth of plants and animals, the development of silicon-related products has received widespread attention.

[0003] In the agricultural field, traditional fertilizers mainly focus on the supply of nitrogen, phosphorus, potassium and other macronutrients. However, more and more studies have shown that silicon plays an important role in the growth and development of many crops and in improving their resistance to stress. Silicon can enhance the mechanical strength of plant cell walls and make plant stems tougher, thereby effectively improving the plant's resistance to lodging. At the same time, silicon can also enhance the plant's resistance to diseases and pests, promote photosynthesis, and improve crop quality and yield. However, most silicon in nature exists in the soil in an insoluble form, and the absorption and utilization rate of plants is low, making it difficult to meet the demand for silicon in crop growth. Therefore, developing efficient silicon fertilizer products to convert insoluble silicon into a form that can be absorbed and utilized by plants has become a research hotspot in the current agricultural field.

[0004] In animal husbandry, silicon also plays a role in the physiological processes of animals. It participates in the mineralization process of animal bones and is of great significance for maintaining the normal structure and strength of bones. It may also play a potential role in the formation of connective tissue and cell metabolism of animals. However, the current sources of silicon in feed are limited, and conventional silicon supplements often have the problem of low absorption and utilization rate.

[0005] Existing silicon ore processing methods have many shortcomings and cannot meet the high activity, high purity and safety requirements of silicon products in the fertilizer and feed fields. Traditional processing methods usually cannot effectively destroy the stable lattice structure of silicon ore, making it difficult to fully release and activate the silicon element, resulting in unsatisfactory effects of the product in practical applications. In addition, impurities that may be introduced during the processing and the reaction conditions that cannot be precisely controlled also limit the widespread application of silicon ore in agriculture and animal husbandry.

[0006] Therefore, there is an urgent need for an innovative silicon ore activation method that can efficiently convert silicon ore into silicon products with high activity and applicability to meet the special needs of silicon in the fertilizer and feed fields and promote the sustainable development of agriculture and animal husbandry. Summary of the invention

[0007] The purpose of the present invention is to provide a silicon ore activation method and application thereof, so as to improve the activity of silicon ore and expand its application scope, especially in the field of fertilizer and feed; the present invention significantly improves the activity of silicon ore by reasonably selecting an activator and optimizing the calcination and cooling process, so that it can better meet the needs of various industrial applications; the rotary kiln calcination process can realize continuous production, improve production efficiency and reduce production costs; the high-temperature rapid cooling treatment effectively fixes the high-activity structure of the silicon ore and ensures the stability of product quality.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows: a silicon ore activation method and application thereof, the activation method comprising the following steps:

[0009] (1) Raw material preparation: Select appropriate silicon ore raw materials and pre-treat them to remove impurities and large particles to make them uniform in particle size;

[0010] (2) Adding an activator: mixing the pretreated silicon ore and the activator evenly according to a set ratio;

[0011] (3) Rotary kiln calcination: The silicon ore mixed with the activator is sent to the rotary kiln for calcination, and the calcination temperature is controlled at 900-1200°C;

[0012] (4) High-temperature rapid cooling: The calcined silicon ore is rapidly subjected to high-temperature rapid cooling. The rapid cooling fixes the lattice structure of the silicon ore, preventing the lattice from being reorganized during the slow cooling process and reducing its activity, thereby retaining the high activity state obtained by high-temperature calcination;

[0013] (5) Powder making: The silicon ore that has been rapidly cooled at high temperature is crushed to produce silicon powder of the required particle size for subsequent applications.

[0014] Furthermore, the silicon content of the silicon ore in step (1) is 90% to 98%.

[0015] Furthermore, the pretreatment in step (1) includes crushing and screening.

[0016] Furthermore, the particle size of the silicon ore after pretreatment in step (1) is 1-10 mm.

[0017] Furthermore, in step (2), the activating agent is one or more of potassium hydroxide, potassium carbonate, oxalic acid, calcium fluoride and sodium fluoride.

[0018] Furthermore, in step (2), the mass ratio of the activator to the pretreated silicon ore is 1:5 to 1:30.

[0019] Furthermore, the rotary kiln calcination process in step (3) includes staged heating and heat preservation steps.

[0020] Furthermore, in step (4), high temperature rapid cooling is performed by air cooling or water cooling.

[0021] Furthermore, the present invention can be applied to fields such as fertilizers and feeds.

[0022] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The present invention significantly improves the activity of silicon ore by rationally selecting an activator and optimizing the calcination and cooling processes, so that it can better meet the needs of various industrial applications; (2) The present invention uses a rotary kiln calcination process to achieve continuous production, improve production efficiency, and reduce production costs; (3) The present invention uses high-temperature rapid cooling treatment to effectively fix the high-activity structure of silicon ore, thereby ensuring the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Figure 3. Body weight changes of mice.

[0024] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0027] The experimental methods in the following examples are conventional methods unless otherwise specified; the test materials and test strains used in the following examples are purchased from commercial channels unless otherwise specified.

[0028] Example 1

[0029] A silicon ore activation method and its application

[0030] The activation method comprises the following steps:

[0031] (1) Raw material preparation: Select silicon ore raw material with a silicon content of 90%, crush and screen it, remove impurities and large particles, and obtain silicon ore raw material with a particle size of 1-10 mm;

[0032] (2) Adding an activator: mixing the activator sodium carbonate and the pretreated silicon ore in a mass ratio of 1:10;

[0033] (3) Rotary kiln calcination: The silicon ore mixed with the activator is fed into a rotary kiln for calcination. The calcination temperature is controlled at 900-1200°C. The temperature in the rotary kiln is raised from room temperature to 500-600°C at a heating rate of 5-10°C per minute. After reaching 500-600°C, the temperature is kept at this temperature for 30-60 minutes. Then, the temperature is raised from 500-600°C to 800-900°C at a rate of 8-12°C per minute and kept at this temperature for 60-90 minutes. The temperature is further raised at a rate of 10-15°C per minute to the target high temperature range of 900-1200°C and kept at this temperature for 90-180 minutes.

[0034] (4) High-temperature rapid cooling: After calcination, the silicon ore is rapidly cooled by air cooling to quickly reduce the material temperature to below room temperature;

[0035] (5) Powder making: The rapidly cooled silicon ore is fed into a pulverizer and crushed to 0.01-0.5 mm to obtain activated silicon powder.

[0036] Example 2

[0037] A silicon ore activation method and its application

[0038] The activation method comprises the following steps:

[0039] (1) Raw material preparation: Select silicon ore raw material with a silicon content of 95%, crush and screen it, remove impurities and large particles, and obtain silicon ore raw material with a particle size of 1-10 mm;

[0040] (2) Adding an activator: mixing the activator calcium chloride and the pretreated silicon ore in a mass ratio of 1:15;

[0041] (3) Rotary kiln calcination: The silicon ore mixed with the activator is fed into a rotary kiln for calcination. The calcination temperature is controlled at 900-1200°C. The temperature in the rotary kiln is raised from room temperature to 500-600°C at a heating rate of 5-10°C per minute. After reaching 500-600°C, the temperature is kept at this temperature for 30-60 minutes. Then, the temperature is raised from 500-600°C to 800-900°C at a rate of 8-12°C per minute and kept at this temperature for 60-90 minutes. The temperature is further raised at a rate of 10-15°C per minute to the target high temperature range of 900-1200°C and kept at this temperature for 90-180 minutes.

[0042] (4) High-temperature rapid cooling: After calcination, the silicon ore is rapidly cooled by air cooling to quickly reduce the material temperature to below room temperature;

[0043] (5) Powder making: The rapidly cooled silicon ore is fed into a pulverizer and crushed to 0.01-0.5 mm to obtain activated silicon powder.

[0044] Example 3

[0045] A silicon ore activation method and its application

[0046] The activation method comprises the following steps:

[0047] (1) Raw material preparation: Select silicon ore raw material with a silicon content of 98%, crush and screen it, remove impurities and large particles, and obtain silicon ore raw material with a particle size of 1-10 mm;

[0048] (2) Adding an activator: mixing the activator oxalic acid and the pretreated silicon ore in a mass ratio of 1:30;

[0049] (3) Rotary kiln calcination: The silicon ore mixed with the activator is fed into a rotary kiln for calcination. The calcination temperature is controlled at 900-1200°C. The temperature in the rotary kiln is raised from room temperature to 500-600°C at a heating rate of 5-10°C per minute. After reaching 500-600°C, the temperature is kept at this temperature for 30-60 minutes. Then, the temperature is raised from 500-600°C to 800-900°C at a rate of 8-12°C per minute and kept at this temperature for 60-90 minutes. The temperature is further raised at a rate of 10-15°C per minute to the target high temperature range of 900-1200°C and kept at this temperature for 90-180 minutes.

[0050] (4) High-temperature rapid cooling: After calcination, the silicon ore is rapidly cooled by air cooling to quickly reduce the material temperature to below room temperature;

[0051] (5) Powder making: The rapidly cooled silicon ore is fed into a pulverizer and crushed to 0.01-0.5 mm to obtain activated silicon powder.

[0052] Experimental Example 1

[0053] Effect of a silicon ore activation method on feed performance

[0054] The activated silicon powder prepared by the methods of Examples 1, 2 and 3 was added to the basic feed, and the experimental group feed was prepared at an addition amount of 1%, and fed to mice respectively. The observation was continued for 30 days, with 10 mice in each group, a total of 30 mice, and the weight status of the mice was recorded.

[0055] Result analysis: Figure 1 As shown, the body weights of the mice in Example 1, Example 2 and Example 3 groups all increased significantly, with the largest increase in the body weight of the mice in Example 1 group.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0057] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A silicon ore activation method and application thereof, characterized in that: The activation method comprises the following steps: (1) Raw material preparation: Select appropriate silicon ore raw materials and pre-treat them to remove impurities and large particles to make them uniform in particle size; (2) Adding an activator: mixing the pretreated silicon ore and the activator evenly according to a set ratio; (3) Rotary kiln calcination: The silicon ore mixed with the activator is sent to the rotary kiln for calcination, and the calcination temperature is controlled at 900-1200°C; (4) High-temperature rapid cooling: The calcined silicon ore is rapidly subjected to high-temperature rapid cooling. The rapid cooling fixes the lattice structure of the silicon ore, preventing the lattice from being reorganized during the slow cooling process and reducing its activity, thereby retaining the high activity state obtained by high-temperature calcination; (5) Powder making: The silicon ore that has been rapidly cooled at high temperature is crushed to produce silicon powder of the required particle size for subsequent applications.

2. A silicon ore activation method and application thereof according to claim 1, characterized in that: The silicon content of the silicon ore in step (1) is 90% to 98%.

3. A silicon ore activation method and application thereof according to claim 2, characterized in that: The pretreatment in step (1) includes crushing and screening.

4. A silicon ore activation method and application thereof according to claim 3, characterized in that: The particle size of the silicon ore after pretreatment in step (1) is 1-10 mm.

5. A silicon ore activation method and application thereof according to claim 4, characterized in that: In the step (2), the activating agent is one or more of potassium hydroxide, potassium carbonate, oxalic acid, calcium fluoride and sodium fluoride.

6. A silicon ore activation method and application thereof according to claim 5, characterized in that: In the step (2), the mass ratio of the activator to the pretreated silicon ore is 1:5 to 1:

30.

7. A silicon ore activation method and application thereof according to claim 6, characterized in that: The rotary kiln calcining process in step (3) includes staged heating and heat preservation steps.

8. A silicon ore activation method and application thereof according to claim 7, characterized in that: In the step (4), high temperature rapid cooling is performed by air cooling or water cooling.

9. A silicon ore activation method and application thereof according to claim 8, characterized in that: The invention can be applied to the fields of fertilizers, feeds, etc.

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