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Molded lump and production method therefor

A manufacturing method and block technology, which is applied in the field of block, can solve the problems of short retention time and deterioration of combustion efficiency, etc.

Inactive Publication Date: 2003-07-30
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since such small particles of plastic are sent into the combustion cavity in front of the tuyere of the blast furnace, they immediately scatter and stay in the cavity of the combustion cavity in front of the tuyere of the blast furnace for a very short time, so the combustion efficiency deteriorates

Method used

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  • Molded lump and production method therefor
  • Molded lump and production method therefor
  • Molded lump and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] use figure 1 With the granulation device shown in Fig. 2, waste plastics were pretreated with examples of the present invention and comparative examples (existing methods).

[0142] In the present embodiment, use die opening inner diameter: 840mm, die opening width: 240mm, die opening thickness (die hole length): 60mm, turning roller roll diameter: 405mm, die hole diameter: 6mm, number of die holes: 10,000 The granulation device feeds at a total speed of 1.0-1.5t / h of solid plastic (A) and flake plastic (B) (flaky plastic). The sheet-like plastic (B) is 32% by weight of polyethylene, 31% by weight of polypropylene, 22% by weight of polystyrene, and 15% by weight of others (such as paper). The solid plastic (A) is 37% by weight of polyethylene, 34% by weight of polypropylene, 22% by weight of polystyrene, and 7% by weight of others (paper, etc.).

[0143] Table 1 shows the results of the examples of the present invention and the comparative examples. The strength, pro...

Embodiment 2

[0211] Except using the following block of the present invention manufactured by a porous extrusion molding machine, it is the same as in Example 1, and the existing block is passed through a pneumatic feeding device, and is sprayed from the blast furnace tuyere in operation. , and investigated malfunctions such as blockages in the equipment. That is to say, use a ring-shaped die-type granulator with an effective die thickness T: 70mm and a die diameter d: φ6 mm to make lumps from raw materials with a prepared particle size D: 10-15 mm. The outlet temperature of the granulator was 110°C. At this time, the average strength index of the block is 600, and the size of the block is φ6×10mm.

[0212] As a result, the cakes within the scope of the present invention showed a high percent burnup of over 90%. On the contrary, the lumps outside the range of this invention have a combustion rate of 50 to 88% and clogging due to their strength or particle diameter outside the range of th...

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Abstract

Waste plastics containing solid plastics, slice plastics and foamed plastics are supplied into an annular die of a plastic extrusion device. The waste plastics are half-melted or melted and extruded from die holes to the annular die outer peripheral surface. The extruded plastic moldings are cut off or scraped off from the annular die outer peripheral surface. Each molded lump has a melt-solidified surface, a strength capable of reaching a preset area in a furnace raceway when blown into the furnace, and a grain size capable of providing velocities higher than a critical velocity.

Description

technical field [0001] The present invention relates to a method of forming a block from waste plastics (plastic waste) of general waste and industrial waste as a raw material and the formed block. In particular, it relates to a block used as a raw material for injection into a blast furnace, a cement kiln, and a method for producing the same. Background technique [0002] When waste plastics are used as raw materials for blast furnace injection, the waste plastics are sent to the tuyere by means of air transport and injected into the blast furnace. Therefore, the waste plastics should be processed into lumps with particle size and bulk density suitable for air transport and injection into the blast furnace in advance. In particular, since the bulk density of flake-shaped plastics is lower than that of consolidated (block-shaped) plastics, there is a problem that clogging in the piping is likely to occur only by air transportation for simple crushing. Therefore, it is a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/20B29B17/00B30B11/20C10L5/48C21B5/02
CPCB29B2017/0496C21B5/023C21B5/026B29B2017/0456Y02E50/30B29B17/0036C10L5/48B01J2/20B30B11/201B29B17/0026C10L5/363Y02E50/10Y02W30/62Y10T428/2927B30B11/227B29B9/08B29B7/66B29B17/00B29B9/06
Inventor 菅昌徹朗富冈浩一石黑宏树大垣阳二中村英夫小西武史寺田周雄根本谦一若松信一中谷宽小柳保章金谷弦治浅沼稔当麻一郎阿部盛一
Owner JFE STEEL CORP
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