CN103625005A - Method for manufacturing wood fiber composite protective tube - Google Patents

Abstract

A method for manufacturing a wood fiber composite protective tube includes the steps that firstly, 90% of papermaking blowdown residues, 5% of perlite, 3% of fire retardant and 2% of starch glue and sodium silicate are taken; secondly, the papermaking blowdown residues are crushed and then evenly mixed with perlite, fire retardant, starch glue and sodium silicate in a stirring mode, and then composite materials are extruded out of an outlet, in geometric dimension, of a changeable die through an extrusion system of a twin screw extruder, a drive system and a heating cooling system. The method particularly includes the following implementation steps of crushing the paper residues, evenly stirring the composite materials, tightly covering the materials, filling the materials into a hopper of the extruder to be extruded, heated, cooled and extruded out, flat placing the materials on turnover goods shelves, placing the materials in an overhead mode and on multiple layers for airing and drying, detecting the water content, the internal diameter and the external diameter of the materials, cutting the length of the materials, packaging the materials and placing finished products into a storage. The blowdown residues in a papermaking factory are fully utilized as main raw materials, and therefore production cost of an original protective tube is greatly lowered. Economic benefits of production of the protective tube are effectively increased, and downstream procurement cost is lowered; profit margins are increased, and energy saving, emission reduction and environment friendliness are achieved.

Description

The preparation method of wood fibre compound protective pipe

Technical field

The present invention relates to a kind of preparation method of wood fibre compound protective pipe, be mainly used in the protection tube of parameter detection device in metal smelt process, be i.e. the protection tube of the general fast thermocouple of steel industry, steel, sampler of iron melt, compound Determining oxygen probe; The sleeve pipe that is called for short temperature measuring head, sampler.

Background technology

Conventional temperature measuring head, sampler sleeve pipe are all with yellow straw board, to add amylan to roll and form through automatic reeling machine, comprise international top-brand: the various detecting element protection tubes of congratulating Li Shi electrical measurement knight Co., Ltd.Although not yet note abnormalities on quality parameter, the cost that yellow straw board is done protection tube is too high, and on paper tube, glue is moist after rolling, dry or drying course in yielding, so physical dimension qualification rate <98%.

Summary of the invention

The object of the invention will overcome the above problems exactly, a kind of preparation method of wood fibre compound protective pipe is provided, after Technique Popularizing, the waste (700,000,000 tons of calculating of domestic steel in 2012) of annual 100000 tons of left and right yellow straw board resources will be reduced, improve the high sexual valence utilization of papermaking blowdown residue, energy-conservation, reduction of discharging, environmental protection; It is that profit margin improves in downstream producer that protection tube is cheaply provided.

Technical scheme of the present invention is achieved like this: a kind of preparation method of wood fibre compound protective pipe, is characterized in: first get papermaking blowdown slag 90%, perlite 5%, fire retardant 3%, amylan and sodium metasilicate 2%; Again by after the fragmentation of papermaking blowdown slag with perlite, fire retardant, amylan and sodium metasilicate mixing and stirring, through the outlet of extrusion system, transmission system, heating and cooling system and the interchangeable mould size of twin (double) screw extruder, extrude; Concrete implementation step is as follows:

1. paper residue is broken; 2. composite uniform stirring; 3. shelving; 4. pack that extruder hopper pushes into, heating, cooling, extrude; 5. be placed on turnover goods shelf keep flat, built on stilts multilayer dry in the air put dry, detect moisture content and internal-and external diameter; 6. length is sheared; 7. packing, finished product are put in storage.

It is main material that the present invention makes full use of paper mill blowdown residue, greatly reduces the production cost of former protection tube.Effectively improve the economic benefit of producing protection tube, reduce downstream purchase cost; Improve profit margin.Energy-conservation, reduction of discharging environmental protection.

The specific embodiment

The preparation method of wood fibre compound protective pipe of the present invention, concrete steps are as follows: 1. get papermaking blowdown slag 90%(after testing containing wood fibre more than 70%), perlite 5%, fire retardant 3%, amylan and sodium metasilicate 2%; 2. broken uniform stirring; 3. shelving; 4. pack extruder hopper into; 5. push, heating, cooling, extrude; 6. turnover goods shelf keeps flat, built on stilts multilayer puts and dry; 7. conventional detection; 8. length is sheared; 9. pack; 10. finished product is put in storage.

The automatic producing device of wood fibre compound protective pipe of the present invention is twin (double) screw extruder; mechanical technique is ripe; method of operating is not difficult, after product promotion yellow straw board paper tube cannot with the sexual valence contrast of wood fibre compound protective pipe, economic benefit, social benefit, the use of extensible other pipes also.

Because this protection tube is disposable products in smelting iron and steel, as long as duration of fire resistance is greater than 8 seconds and just enough meets time, the specification requirement of any kind detected parameters in molten steel; Therefore to make full use of paper mill residue be raw material in the present invention, through scientific ingredients, and through twin (double) screw extruder extruding, heating, cooling and shape; Can not laser heating thereby get rid of automatic reeling machine, cooling drawback, push closely, heat cooling and not yielding, reduce production costs, improve product percent of pass.

Claims (1)

1. a preparation method for wood fibre compound protective pipe, is characterized in that: first get papermaking blowdown slag 90%, perlite 5%, fire retardant 3%, amylan and sodium metasilicate 2%; Again by after the fragmentation of papermaking blowdown slag with perlite, fire retardant, amylan and sodium metasilicate mixing and stirring, through the outlet of extrusion system, transmission system, heating and cooling system and the interchangeable mould size of twin (double) screw extruder, extrude; Concrete implementation step is as follows:

1. paper residue is broken; 2. composite uniform stirring; 3. shelving; 4. pack that extruder hopper pushes into, heating, cooling, extrude; 5. be placed on turnover goods shelf keep flat, built on stilts multilayer dry in the air put dry, detect moisture content and internal-and external diameter; 6. length is sheared; 7. packing, finished product are put in storage.