Silicon crystal powder and processing method thereof

Abstract

The invention relates to the technical field of silicon crystal powder processing, in particular to silicon crystal powder and a processing method thereof. The technical scheme provided by the invention is as follows: the silicon crystal powder is prepared by mixing the following raw materials in percentage by weight: 90%-98% of SiO2, 0.6%-1.5% of mineral powder, 1.2%-3% of calcium oxide, 0.5%-2.2% of talcum powder and 0.8%-1.8% of illite powder. Preferably, the raw materials comprise, by weight, 92%-96% of SiO2, 0.8%-1.2% of mineral powder, 1.8%-2.2% of calcium oxide, 0.8%-1.2% of talcum powder and 0.9%-1.3% of illite powder. Preferably, the raw materials comprise, by weight, 95% of SiO2, 1% of mineral powder, 2% of calcium oxide, 1% of talcum powder and 1% of illite powder. The preparation method of the silicon crystal powder is characterized by comprising the following steps: stirring, heating and cooling SiO2, mineral powder, calcium oxide, talcum powder and illite powder in the raw materials. The novel powder has the advantages that magnesium oxide is replaced by the novel powder, the high-temperature-resistant temperature limit of the novel silicon crystal powder is 1500-1700 DEG C, the powder is good in heat conduction effect, small in heat resistance and high in heating speed, the energy-saving effect is achieved, and the service life of an electric heating tube is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon crystal powder processing, and in particular to silicon crystal powder and a processing method thereof. Background Art

[0002] Traditional magnesium oxide is used as a filler for electric heating tubes. High-temperature powdered magnesium oxide has defects and is easy to absorb moisture. The high-temperature resistance limit of high-temperature magnesium oxide powder is 1200-1300 degrees, and the thermal resistance is large.

[0003] In view of the above problems, a silicon crystal powder and a processing method thereof are proposed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide a silicon crystal powder and a processing method thereof.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: a silicon crystal powder and a processing method thereof, which are mixed with the following raw materials in weight ratio: SIO2 90%-98%, ore powder 0.6%-1.5%, calcium oxide 1.2%-3%, talc powder 0.5%-2.2% and illite powder 0.8%-1.8%.

[0006] Preferably, the weight ratio of the raw materials is: SIO2 92%-96%, ore powder 0.8%-1.2%, calcium oxide 1.8%-2.2%, talc powder 0.8%-1.2% and illite powder 0.9%-1.3%.

[0007] Preferably, the weight ratio of the raw materials is: 95% SIO2, 1% ore powder, 2% calcium oxide, 1% talc powder and 1% illite powder.

[0008] The method for preparing silicon crystal powder is characterized in that SiO2, ore powder, calcium oxide, talcum powder and illite powder in the raw materials are stirred, heated and cooled.

[0009] The specific preparation method comprises the following steps:

[0010] The above raw materials are selected in proportions greater than the required number, and the SiO2, ore powder, calcium oxide, talcum powder and illite powder are mixed evenly. While mixing, add an appropriate amount of moisture-proof agent to the raw materials;

[0011] The stirred SiO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proofing agent are subjected to heating treatment;

[0012] The heated SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are cooled.

[0013] Preferably, the SiO2 is ground into 40-60 mesh powder before mixing.

[0014] Preferably, in step (2), the temperature of SIO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proofing agent is raised to 800-1200°C.

[0015] Preferably, in step (2), SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are heat treated for 3 hours.

[0016] The beneficial effects of the present invention are: this new powder replaces magnesium oxide, the new silicon crystal powder has a high temperature resistance limit of 1500 degrees to 1700 degrees, this powder has good thermal conductivity, small thermal resistance, fast heating speed, energy saving effect, and prolongs the service life of the electric heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the present invention; Figure 2 It is a PBBS / PBDES detection flow chart of the present invention; Figure 3 It is a flow chart of Phthalates detection of the present invention; Figure 4 This is a flow chart of hexavalent chromium detection of the present invention; Figure 5 It is the element (IEC62321) detection flow chart of the present invention; Figure 6 This is the test report of the electrical grade magnesium oxide of the present invention. DETAILED DESCRIPTION

[0018] The present invention is described below with specific embodiments, but is not intended to be limiting of the present invention.

[0019] Embodiment 1: The following raw materials are mixed in weight proportion: SIO2 90%-98%, ore powder 0.6%-1.5%, calcium oxide 1.2%-3%, talc powder 0.5%-2.2% and illite powder 0.8%-1.8%.

[0020] Preferably, the weight ratio of the raw materials is: SIO2 92%-96%, ore powder 0.8%-1.2%, calcium oxide 1.8%-2.2%, talc powder 0.8%-1.2% and illite powder 0.9%-1.3%.

[0021] Preferably, the weight ratio of the raw materials is: 95% SIO2, 1% ore powder, 2% calcium oxide, 1% talc powder and 1% illite powder.

[0022] The method for preparing silicon crystal powder is characterized in that SiO2, ore powder, calcium oxide, talcum powder and illite powder in the raw materials are stirred, heated and cooled.

[0023] The specific preparation method comprises the following steps:

[0024] The above raw materials are selected in proportions greater than the required number, and the SiO2, ore powder, calcium oxide, talcum powder and illite powder are mixed evenly. While mixing, add an appropriate amount of moisture-proof agent to the raw materials;

[0025] The stirred SiO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proofing agent are subjected to heating treatment;

[0026] The heated SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are cooled.

[0027] Preferably, the SiO2 is ground into 40-60 mesh powder before mixing.

[0028] Preferably, in step (2), the temperature of SIO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proofing agent is raised to 800-1200°C.

[0029] Preferably, in step (2), SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are heat treated for 3 hours.

[0030] Embodiment 2: The following raw materials are mixed in weight proportion: SIO2 90%-98%, ore powder 0.6%-1.5%, calcium oxide 1.2%-3%, talc powder 0.5%-2.2% and illite powder 0.8%-1.8%.

[0031] Preferably, the weight ratio of the raw materials is: SIO2 93%-95%, ore powder 0.9%-1.1%, calcium oxide 1.9%-2.1%, talc powder 0.9%-1.1% and illite powder 0.9%-1.1%.

[0032] Preferably, the weight ratio of the raw materials is: 95% SIO2, 1% ore powder, 2% calcium oxide, 1% talc powder and 1% illite powder.

[0033] The method for preparing silicon crystal powder is characterized in that SiO2, ore powder, calcium oxide, talcum powder and illite powder in the raw materials are stirred, heated and cooled.

[0034] The specific preparation method comprises the following steps:

[0035] The above raw materials are selected in proportions greater than the required number, and the SiO2, ore powder, calcium oxide, talcum powder and illite powder are mixed evenly. While mixing, add an appropriate amount of moisture-proof agent to the raw materials;

[0036] The stirred SiO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proofing agent are subjected to heating treatment;

[0037] The heated SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are cooled.

[0038] Preferably, the SiO2 is ground before mixing to a powder of 35-55 mesh.

[0039] Preferably, in step (2), the temperature of SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant is raised to 900-1250°C.

[0040] Preferably, in step (2), the SiO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are heat treated for 2-4.5 hours.

[0041] Example 3: The weight ratio of raw materials is: SIO2 92%-96%, ore powder 0.8%-1.2%, calcium oxide 1.8%-2.2%, talc powder 0.8%-1.2% and illite powder 0.9%-1.3%.

[0042] Preferably, the weight ratio of the raw materials is: 95% SIO2, 1% ore powder, 2% calcium oxide, 1% talc powder and 1% illite powder.

[0043] The method for preparing silicon crystal powder is characterized in that SiO2, ore powder, calcium oxide, talcum powder and illite powder in the raw materials are stirred, heated and cooled.

[0044] The specific preparation method includes the following steps: grinding SIO2 before mixing to a powder of 40-60 mesh, stirring the ground SIO2, ore powder, calcium oxide, talcum powder and illite powder evenly, adding a proper amount of desiccant to the raw materials while stirring, heating the stirred SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant to 800-1200°C and performing heat treatment for 3 hours, and cooling the heated SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

[0051] 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.

Claims

1. A silicon crystal powder and a processing method thereof, It is characterized in that The invention is prepared by mixing the following raw materials in the following weight proportions: 90%-98% of SIO2, 0.6%-1.5% of ore powder, 1.2%-3% of calcium oxide, 0.5%-2.2% of talc powder and 0.8%-1.8% of illite powder.

2. A silicon crystal powder and a processing method thereof according to claim 1, It is characterized in that The weight ratio of the raw materials is: sio2 92%-96%, ore powder 0.8%-1.2%, calcium oxide 1.8%-2.2%, talc powder 0.8%-1.2% and illite powder 0.9%-1.3%.

3. A silicon crystal powder and a processing method thereof according to claims 1 to 2, It is characterized in that The weight ratio of the raw materials is: 95% of SIO2, 1% of ore powder, 2% of calcium oxide, 1% of talc powder and 1% of illite powder.

4. A method for preparing the silicon crystal powder according to any one of claims 1 to 3, It is characterized in that Take the SIO2, ore powder, calcium oxide, talcum powder and illite powder from the raw materials and stir, heat and cool them. The specific preparation method comprises the following steps: (1) The above raw materials are selected in greater than the required proportions, and the SiO2, ore powder, calcium oxide, talcum powder and illite powder are mixed evenly. While stirring, add an appropriate amount of moisture-proof agent to the raw materials; (2) heating the stirred SiO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant; (3) Cooling the heated SiO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant.

5. A silicon crystal powder and a processing method thereof according to claim 4, It is characterized in that The SiO2 is ground before mixing to a powder of 40-60 meshes.

6. A silicon crystal powder and a processing method thereof according to claim 4, It is characterized in that In the step (2), the temperature of SIO2, ore powder, calcium oxide, talcum powder, illite powder and moisture-proof agent is raised to 800-1200°C.

7. A silicon crystal powder and a processing method thereof according to claim 4, It is characterized in that In the step (2), SIO2, ore powder, calcium oxide, talcum powder, illite powder and desiccant are heat treated for 3 hours.

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