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Biochar pencil lead, and preparation method thereof

A bio-carbon, pencil lead technology, applied in pencil lead, household utensils, applications, etc., can solve problems such as potential safety hazards, large floor space, air pollution, etc., and achieve smooth writing, not easy to break, and strong colors. Effect

Inactive Publication Date: 2019-01-11
蚌埠神龙笔业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Waste straw in rural areas is generally treated by crushing on the spot and returning to the field or harvesting and stacking. Stacking occupies a large area and is difficult to store. It is easy to cause safety hazards in dry weather; The air creates a huge pollution and is now banned

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing biochar, comprising the following steps:

[0026] Step 1, crushing the wood raw material composed of straw, bamboo chips, and walnut shells with a weight ratio of 4.8:1.8:1 to 4 cm to obtain wood particles;

[0027] Step 2, placing the wood particles obtained in step 1 in a phosphoric acid solution with a mass fraction of 29%, soaking for 1.8 hours, draining to obtain the pickled wood particles;

[0028] Step 3, heating with air isolation, raising the temperature of the pickled wood pellets obtained in step 2 to 435° C., at a heating rate of 3° C. / min, and keeping warm and carbonizing for 2.3 hours to obtain biochar.

Embodiment 2

[0030] A method for preparing biochar, comprising the following steps:

[0031] Step 1, crushing the wood raw material composed of straw, bamboo chips, and walnut shells with a weight ratio of 5.7:1.3:1 to 3 cm to obtain wood particles;

[0032] Step 2, placing the wood particles obtained in step 1 in a phosphoric acid solution with a mass fraction of 31%, soaked for 1.9 hours, drained to obtain the pickled wood particles;

[0033] Step 3, heating with air isolation, raising the temperature of the pickled wood pellets obtained in step 2 to 430° C., at a heating rate of 5° C. / min, and holding the carbonization reaction for 2.2 hours to obtain biochar.

Embodiment 3

[0035] A method for preparing biochar, comprising the following steps:

[0036] Step 1, crushing the wood raw material composed of straw, bamboo chips, and walnut shells with a weight ratio of 4.2:1.5:1 to 2 cm to obtain wood particles;

[0037] Step 2, placing the wood particles obtained in step 1 in a phosphoric acid solution with a mass fraction of 33%, soaking for 1.6 hours, and draining to obtain the pickled wood particles;

[0038] Step 3, heating with air isolation, raising the temperature of the pickled wood pellets obtained in step 2 to 425° C. at a heating rate of 4° C. / min, and keeping warm for 2.4 hours for carbonization reaction to obtain biochar.

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PUM

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Abstract

The invention discloses a biochar pencil lead, and a preparation method thereof. The biochar pencil lead comprises biochar, diatomite, talcum powder, silicon carbide, acrylic emulsion, palm oil, and ethanol. The preparation method comprises following steps: biochar, diatomite, talcum powder, and silicon carbide are mixed and grinded so as to obtain a mixed powder; acrylic emulsion, palm oil, and ethanol are uniformly mixed so as to obtain a mixed solution; the mixed solution is added into the mixed powder, an obtained mixture is stirred to be uniform, and is subjected to kneading at 70 to 90 DEG C for 15 to 30min so as to obtain a pencil lead mixture; the pencil lead mixture is subjected to extrusion moulding so as to obtain the biochar pencil lead. The biochar pencil lead is heavy in color, and smooth in writing; the writing effect is equal to that of conventional graphite pencil lead; the strength is high; and rupture is not easily caused.

Description

technical field [0001] The invention relates to the field of pencil preparation, in particular to a bio-carbon pencil lead and a preparation method thereof. Background technique [0002] Pencil is an indispensable tool in the process of teaching and drawing. It has the characteristics of easy erasure and modification, and plays a decisive role in primary school students' learning and people's drawing work. A pencil is mainly composed of a pencil shaft and a pencil lead, and the main component of the pencil lead is graphite. [0003] Graphite is an extremely important non-metallic mineral. Its processed products are not only widely used in traditional industries such as the steel industry, but also in emerging industries such as new energy and new materials. It is considered to be an important strategic resource to support the development of high-tech in the future. . Our government attaches great importance to the protection, development and utilization of graphite resourc...

Claims

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Application Information

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IPC IPC(8): C09D13/00
CPCC09D13/00
Inventor 朱建青
Owner 蚌埠神龙笔业有限公司
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