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Fine powder of mixed plastic and its production process

A technology for mixing plastics, manufacturing methods, used in plastics recycling, fuels, solid fuels, etc.

Active Publication Date: 2008-05-28
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the wet centrifugal separation method uses the relative specific gravity difference with the specific gravity liquid for separation, polystyrene, polyethylene terephthalate, etc., which have the same specific gravity as chlorine-containing plastics, are mixed into the heavy substance side like chlorine-containing plastics. , becomes the separation loss

Method used

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  • Fine powder of mixed plastic and its production process
  • Fine powder of mixed plastic and its production process
  • Fine powder of mixed plastic and its production process

Examples

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Embodiment 1

[0101] The equipment shown in Figure 5 was used for micronization of waste plastics. The waste plastics used are waste from general households, and are mixed with various plastics and impurities. Its composition is: polyethylene 32 mass%, polypropylene 31 mass%, polystyrene 22 mass%, others (paper, etc.) ) 15% by mass. After removing impurities such as metals, washing is carried out, and film-like plastics are selected and crushed to a particle size of about 20mm for processing. The chlorine content after removal of impurities was 1.4% by mass.

[0102] To the waste plastics that have undergone the above pretreatment, add and mix PVC, which is industrial waste, into pulverized products with a particle size of about 20mm, and prepare to make the chlorine concentration in the waste plastics 1.4 (no chlorine-containing plastics are mixed) Raw materials (Nos. 1 to 7) of ~ 24.1% by mass are heated and melted and then cooled to form a solidified body, which is pulverized to produc...

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PUM

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Abstract

The present invention provides a method for producing mixed plastic micropowder, which includes the following steps: by increasing or decreasing at least one plastic selected from the group consisting of chlorine-containing plastics and chlorine-free plastics, to prepare plastics with a chlorine concentration of 2-2 20% by mass of the mixed plastic; stirring the mixed plastic under melting, and performing dechlorination until the chlorine concentration is 0.9% by mass or less; cooling and solidifying the dechlorinated stirred material; and A step of pulverizing the cured product. By applying this method, as long as the chlorine concentration is within a specified range, increasing the chlorine concentration in waste plastics can promote stirring and dehydrochlorination of molten waste plastics, and therefore, fine waste plastic powders with very low chlorine concentrations can be obtained. Therefore, plastics discarded in daily life and industrial activities can be reused as reducing agents, fuels, etc.

Description

technical field [0001] The invention relates to a mixed plastic micropowder and a manufacturing method thereof. In particular, it relates to a micropowder of waste plastics which is easy to reuse plastics discarded in daily life or industrial activities as a reducing agent or fuel, and a method for producing the same. Background technique [0002] In order to use it as a substitute material for coke or pulverized coal, there is known a technique of blowing waste plastics into shaft furnaces such as blast furnaces and waste melting furnaces, cement kilns, and the like. [0003] For example, Japanese Patent Application Laid-Open No. 2001-220589 proposes the following technical proposal: waste plastics are granulated and blown in from the jet pipe by means of air transport, so that the waste plastics can be effectively utilized as coke substitutes. According to this technology, in order to increase the combustion rate in the water tank of the furnace and control the strength a...

Claims

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Application Information

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IPC IPC(8): B29B17/04B29B17/00C10L5/48B29K27/00
CPCB29B2017/0496B29B17/0404C10L5/46B29K2027/00Y02E50/30C10L5/48C10L5/366Y02E50/10C08J11/06Y02W30/62B29B17/00B29B17/04
Inventor 浅沼稔原义明梶冈正彦有山达郎林明夫高岛畅宏寺田周雄大垣阳二
Owner JFE STEEL CORP
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