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Chalk prepared from shell powder

A technology of shell powder and chalk, applied in the field of teaching utensils or chalk, which can solve the problems of damaging the health of teachers and students, harmful dust of chalk, and affecting the teaching environment, and achieve the effect of eliminating the impact

Inactive Publication Date: 2007-03-07
张凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the main raw material of known manufacture chalk is to use titanium dioxide, talcum powder, large white powder, gypsum powder, calcium sulfate, calcium carbonate, lime powder, clay powder, barium sulfate, calcium salt, barium salt etc. as main raw material, use these Chalk made of raw materials will produce harmful dust, which will directly affect the teaching environment and damage the health of teachers and students

Method used

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Examples

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Embodiment Construction

[0006] A kind of chalk made from shell powder, which is made by crushing shells of various shellfish such as scallop shells, clam shells, red shells, oyster shells, sea urchin shells, snail shells, mussel shells, sea red shells, etc. into powder. into shell powder, shell powder calcined or not calcined shell powder is used as the main raw material to make chalk; chalk can be made of powdered shell powder as raw material, or partially powdered shell powder can be added with titanium White powder, talcum powder, gypsum powder, calcium sulfate, large white powder, calcium carbonate, barium sulfate, lime powder and other calcium salts and barium salts are used to make chalk, and the proportion of powdered shell powder is 1%-100%; powdered The shell powder can also be added with various pigments to make colored shell chalks of various colors.

[0007] Scallop shells, clam shells, red shells, oyster shells, sea urchin shells, snail shells, clam shells, sea red shells and other shell...

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PUM

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Abstract

The invention discloses a chalk of shell powder, which comprises the following steps: grinding scallop, oyster shell, sea urchin shell and strombuliform shell into powder; sintering shell powder as raw material or without sintering; adopting sintered shell powder to prepare chalk; or adding titanium dioxide, plaster powder, calcium sulfate, large-powder, calcium carbonate, barium sulfate and lime powder in the non-sintered shell powder to prepare chalk; adding kinds of dye to form colorful chalk.

Description

technical field [0001] The invention relates to a chalk made from shell powder, which belongs to the field of teaching utensils or chalk. Background technique [0002] At present, the main raw material of known manufacture chalk is to use titanium dioxide, talcum powder, large white powder, gypsum powder, calcium sulfate, calcium carbonate, lime powder, clay powder, barium sulfate, calcium salt, barium salt etc. as main raw material, use these Chalk made of raw materials will produce harmful dust, which will directly affect the teaching environment and damage the health of teachers and students. Contents of the invention [0003] The purpose of the present invention is to provide a kind of chalk made of shell powder as raw material, which will not produce harmful dust and can produce a good environmental protection effect. [0004] The technical scheme adopted in the present invention is: a kind of chalk made of shell powder as raw material, which is made of scallop shell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 张凯
Owner 张凯
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