Method for producing pulverized waste plastic and solid fuel or mineral reduction material

A manufacturing method and technology for solid fuels, which can be applied to waste fuels, solid fuels, biofuels, etc., can solve the problems of hydrogen chloride generation, unknown grindability of waste plastics, existence of corrosion furnaces, etc., and achieve productivity improvement, low cost, and economical mass processing effect

Active Publication Date: 2011-08-10
JFE STEEL CORP
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  • Abstract
  • Description
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Problems solved by technology

In particular, jet milling and vibrating ball milling are considered to be preferable as methods for obtaining fine powder, but no technology for improving the grindability of waste plastic itself is known.
[0006] On the other hand, when using, for example, waste plastics discarded from households as reducing materials and fuels such as reducing materials for blast furnaces, chlorine-containing plastics such as polyvinyl chloride (hereinafter referred to as PVC) are mixed in the waste plastics, so When used directly, hydrogen chloride, etc. are generated, and there are problems such as corrosion furnaces

Method used

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  • Method for producing pulverized waste plastic and solid fuel or mineral reduction material
  • Method for producing pulverized waste plastic and solid fuel or mineral reduction material
  • Method for producing pulverized waste plastic and solid fuel or mineral reduction material

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Embodiment 1

[0067] Hereinafter, the present invention will be described in more detail based on examples.

[0068] [Example 1 of the present invention] After crushing general waste container and packaging waste plastics to about 1 cm, they were melted and kneaded at 180° C. with a twin-screw extruder. The shear rate during kneading was 243 (1 / sec) (screw diameter 31 mm, gap between screw and barrel 0.2 mm, screw rotation speed 30 rpm, shear rate π×31×30 / 60 / 0.2=243). Generation of moisture (water vapor) was confirmed from the vent hole of the extruder, but flammable decomposition gas was not confirmed. This was air-cooled as it was, and a lump (hardened body) of about 30 mm was obtained.

[0069] The yield of the solidified body was calculated from the feed amount of the raw material and the recovered amount of the solidified body at this time. In addition, the chlorine concentration in the cured body (cured body residual chlorine concentration) and the heat generation of the cured body ...

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Abstract

Provided is a method for producing a pulverized waste plastic wherein it is possible to produce at a low cost and with improved productivity a pulverized product by micropulverization of waste plastic. The method for producing a pulverized waste plastic is characterized in that waste plastic is kneaded at a shear speed of 100 (1/second) or greater as it is being melted at a temperature that is the softening and melting temperature or greater, preferably 160 DEG C, but is a temperature at which flammable decomposition gases are not generated, preferably 270 DEG C or lower, and then is cooled and solidified and the solid product is pulverized. Melting and kneading are preferably performed using an extruder, particularly a biaxial extruder.

Description

technical field [0001] The present invention relates to a method for producing pulverized waste plastics for producing ore reduction materials, solid fuels, and the like by recycling waste plastics. Background technique [0002] In recent years, methods for producing ore reduction materials, solid fuels, and the like from waste plastics have been studied as a means for effective utilization of waste plastics. This is because if the plastic is pulverized, its combustibility will be greatly improved, and it will become a useful fuel resource. [0003] As a conventional technique for converting plastics into solid fuels, there is, for example, a method of directly pulverizing plastics with a pulverizer (see, for example, Non-Patent Document 1). However, in this method, the hard plastic can only be crushed to a particle size of 1-2 mm, and this crushing requires a lot of time and cost, and fibrous and film-like plastics are difficult to crush, so they must be melted separately....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/04B02C19/00B02C19/18B29B17/00C10L5/48C22B1/16C22B1/244
CPCC22B5/10Y02E50/30C10L5/48C22B7/001Y02E50/10Y02P10/20B02C23/08B09B3/00C10L5/46
Inventor 梶冈正彦浅沼稔鹤田秀和
Owner JFE STEEL CORP
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