DE2422434A1 - PROCESS FOR PREPARING ASBESTOS-CEMENT SUSPENSION AND EQUIPMENT FOR CARRYING OUT THE PROCEDURE - Google Patents

Description

PAT E NTA N W A UT

'Dipfc-Phyd. R. Luyken

8 M Ü N C H E N 2 · TA L 2 7

TELEPHONE 2J 15 «■ ·? TTL EX 5 '· "i Ό 7

Gosudarstvennyj Vzezoyusnyj nautschno- P 56 068

issledowatelskij i projektnyj Institute May 9, 1974

asbestozementnych isdelij L / Br Moscow / USSR

VSHPaBBEN ZUM ZJJESSEITES EIIiSR ASEESTZHffill-D-SUSEElTSIOIT IEID AITLAGB ZUIl DÜHCBPÜHSEK DES

The present invention relates to a method for 'preparing an asbestos cement suspension which can be used for the manufacture of _; different asbestos cement products is used, and ^'1 on an installation for performing the ^{erflndungsgenaßQn':} Ve: driving is determined. . .. "' ^Λ -.

The invention can vervvaiijaeil in other industries · '' ground, m which materials crushed with different hardness and must then be mixed together · -. <Y ^s It is a method of preparing a Asbestzenient-Susperi ·

slon, which is used to manufacture asbestos cement products, Yi ; ■

known. This process involves crushing cement - \ - {. " clinker with plaster of paris until cement is obtained, a wet Asbestaer'i · "

fibers and subsequent mixing of the ingredients in a «1 ■. '^;

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ORIGINAL INSPECTED

aqueous iledlum before.

Cement clinker with gypsum is made according to the dam! Dry process in \

a cement factory while asbestos is crushed in an asbestos [). cement factory is frayed. The dry cement powder is used to _: ,; Asbestos cement factory brought where it is with after the liaßverfahren T '. fiberized asbestos and water is mixed.

For crushing cement clinker and gypsum for manufacture different Sronciel mills are used in the cement factories used, in which the substances are continuously dry-shredded · The drum mills have an aspiration system with built-in filters to catch the cement dust, the sewing -. "' rend of dry grinding.

The chillers are equipped with continuous conveyor systems. which the finished poorly ground cement from the cement mills promote to containers (bunkers) that are used for storage The cement is extracted from the bunkers through one of the following catfish (pneumatic motor vehicle or railway ■ 'ν transport) to the asbestos cement factory, ■ ■; /.

The asbestos is produced in the asbestos cement factory in zvjei stages ''

wet-frayed. First the asbestos fibers are added with a. '..

kneaded a small amount of water in a pan mill to get their Yer · ^ - V to break ties. Then they are in another apparatus in; '/' divided into fine fibers in a watery medium, i.e. they are:

The following work step when preparing an asbestos ^ ,, *

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. '. ν ORIGiMAL INSPECTED

cement suapenslon consists of adding cement powder to the
aqueous suspension of shredded asbestos and m a Sorgfa
Mixing the ingredients in mixers of different designs

In this way, the preparation of an asbestos-cement suspension according to the existing methods is used
a whole complex of energy-consuming large machines and equipment for pretreating the raw material components
connected before mixing.

In addition, the crushing of cement clinker according to the dec: drying process is associated with a very high level of dust, so that
•! Filters must be used to collect the dust,
while expensive large bunkers are required to store the cement · <■ ',

To transport the cement powder to a.en asbestos-cement factories, compression ^ - and pneumatic pumps (if using _) pneumatic transport) must be installed or ^ e- ^! closed containers for transport by rail or
Motor vehicle transport can be used.

The apparatus and equipment used for shredding the asbestos and for preparing an asbestos-cement suspension work periodically, which makes it difficult to continuously manufacture products, e.g. drilling and safe-in on pipe and pipe
Tafelformmaschmen. ^ Y.

There are also differently built drum-iehi'kammei ⁱ mills known, which after the hate and dry production method

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ORIGINAL INSPi = CTED

work. These mills consist of a cylinder housing rotating around a central axis, which is subdivided by perforated partition walls into chambers that are 350 to 40% filled with grinding media (balls and cylinders). These mills are designed for grinding materials with the same strength.

Attempts have been made to crush them simultaneously of components of a raw material batch with different To use firmness in a cool. This resulted in abery ^ u sr wished 'iR'Deultaten ^ icht ^ because here the grinding degree of the Components of the grist is different. For example the material with a lower firmness is ground too much, while a foster substance is insufficiently ground. Hence cc inadmissible, clinker, plaster of paris and asbestos together <and at the same time !. In., to grind in a cool place, since the asbestos is ground to stiff, with / -is Fibers are shortened and he himself a Reinforcement Eljcncch.a.f ten loses.

The invention is based on the object of a method Susi Preparing an asbestos-cement suspension with a happy- «;.

to develop seed grinding of clinker and gypsum, which is to simplify ER ■ '■} mÖgllcht, the technological process significantly UNAV

it in an aggregate directly at the point of consumption of the asbestos cement -Suspension to carry out as well as an installation to carry out to create this process, its constructive execution lowering the cost of equipment and the. 2norg

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ORfSiNAL INSPECTED

Country. guaranteed.

This problem is solved by the be la Zubercl-.

tn an asbestos-cement suspension by common Zernahloii of cement clinker · and gypsum, ITassserfasarn of asbestos and subsequent mixing according to the invention -cement clinker and gypsum).,. ^

Be ground together in an aqueous medium. vy Appropriately, v &. Cement clinker and gypsum waste of asbestos cement product lon, e.g. ■ ' Slate, when working on Asbestzenient-HohrendGri; j

Shavings received and also wet final waste from AsbastecenttafGin '' /

The inventive syemase plant has in a cone ro- \ <\

- - \ 1

cylinder housing housed ilanitaern, two i \ from dqnon, 'j an intermediate catanerviand and a zv / is provided with slits

wall at the outlet and represent a spherical drum mill ψ which is used to grind cement clinker and gypsum together in an "aqueous medium and which is connected to one of the front side of the housing" which is connected to a feed device for raw materials, " while the third chamber of the ball mill Pieter a partition wall is separated by Zentraloffnung and adjoins the, opposite housing end face, as a device

is used to shred asbestos, the chamber, which between them and serves to mix the prepared ingredients, at least two openings for unloading the prepared Suspension and a corresponding number of mixing blades ha

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ORIGINAL INSPECTED

ί; 'such a cover these openings, whereby these Klschkancer in ·· an immovably fixed sheet metal body with an unloading support ■ is located.

The theses of the invention are as follows.

Because cement clinker and gypsum together in one Liadlun
be ground, it became possible to carry out the whole process of the first preparation of an asbestos-cement suspension in a unit that is set up directly at the point of use of the suspension, ie in the asbestos-cement factory where the products are manufactured. -: ■

Cement clinker and gypsum are removed using any Baför ~ ' change 3means brought to the asbestos cement factory. From the task bunkers, which ensure a continuous and even supply, the material reaches a shredding plant. The invention. "Emä3e The grinding process for cement clinker and gypsum stipulates that 3 added water in an amount of 3> 5 kls 4-0> o to the crushed mixture will. The exact amount of water which is in the mixture of v. Zg cent kl inker and gypsum should be introduced depends on the UaturV

of the related substance. Asbestos is found in an aqueous median in I.

the same plant in which cement clinker and gypsum are crushed; · be nert. However, the asbestos is separated from the. Cement clinker and j Plaster of paris la a chamber, which is divided by a partition, {-fribed ·

As the asbestos, which has to be shredded via a feed bunker

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ORIGINAL INSPECTED

the plant gleichet Ig is fed, consists of a prepared Geniisch, different types of asbestos, is one which the VYassermenge m poured to fraying asbestos that an asbestos cement suspension with 88 to SOF ₀ Endfeucht; igkei ^ sjchalt er _; will hold. The water should be introduced into the mixture in such a way that the water dose is in the specified range of the percentage. can be adhered to with great accuracy. The shredded asbestos is mixed with dc-ia sermahlenan Zornont and "Glsp" in the same plant In a separate Llschkacimer · For a better understanding of the essence of the invention are the

according to the invention Description drawings of a. v ^ execution of the plant

included for preparing an asbeat cement suspension; it shows Pig 1 the general view of the plant according to the invention, Flg 2 a longitudinal section through the same system, Fig. 3 shows a section according to Ljnle III-III of FIG. 2 in an enlarged Scale,

Flg. 4 shows a section along line IV-IY of FIG. 2 on an enlarged scale Hatred and

Flg. 5 shows a section along line V-V of FIG. 2 on an enlarged scale Scale.

The system shown in the drawings consists of one on pin 1 (Fig. 2) rotating cylinder housing 2 (Flg. 1, 2) and in it located chambers 5, 4, 5 and 6, which are from each other.

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- 8 - - ⁴

are separated by partitions 7 and 7 '.

The chambers J> and 4 form a ball drum mill 8 for the joint grinding of cement clinker and gypsum in an aqueous medium. The ball mill closes on an end face of the Ge. housing 2, which is connected via a screw 9 ^E l ″ to a weight meter (not shown in the drawing).

A chamber 5 closes on the opposite end face of the housing 2 and serves as a device for ITaszerfibers from Asbestos, which is produced by a feed screw 10, which is located in the spigot 1 is located, is supplied.

The chamber 6 arranged between the chambers 4 and 5 is used to the cup of the frayed asbestos with crushed cement clinker and plaster of paris.

The chamber 6 has four on its walls, evenly across the circumference distributed openings 11 (Flg. 3) prepared for unloading dc-r Suspension. These openings are along the entire length of the Lan ;; the arcing chamber 6 is arranged.

Each opening 11 is covered by an I-table scoop 12. The blades 12 favor the homogenization of the frayed '

Asbestos sludge with the cement and prevent the suspension from escaping directly from the plant. '-. The lilschkammer S is located in a sheet metal body 14 with ¹ , a Snt loading nozzle 15 and sits immovable on supports 13 and '

The pins 1 (Flg. 2) run in bearings 16, which on Funda ~ 409848/1019

elements 17 are put on

The inner surface of the housing 2 is provided with a lining 18 which protects it against wear. After removing the latter, access will be possible to. Place grinding media in the chamber, repair the lining and, if necessary, replace and clean the partition walls with the slots.

The first chamber 3 is with grinding media », with 90, 80, 60 mm Diameter filled. Dar! / Sul. Degree is 0.32 to 0.35. the second chamber 4- is filled with Zylpebs. The fourth chamber 5 of the The system is filled with metal blocks with a 50 to 80 mm diameter, which fray the asbestos in an aqueous medium. Ss becomes a filling sgr ad this chamber provided from 0.32 to 0.35.

The intermediate chamber walls 7 and 7 'consist of segments. The* Intermediate chamber wall 7 * consists of segments and has no slots and only one central opening 20 (Fig. 5). The size of the central opening 20 in the intermediate chamber wall 7 'ensures unhindered? The suspension of fiberized asbestos overflows and should not be smaller than the inner diameter of the pin 1.

The intermediate chamber walls 7 have slot-shaped openings 21

(Flg. 4) for the passage of the fabric.

The following is the operation of the invention The system described & niiie ^ with the process according to the invention is also used Preparing an asbestos-cement suspension clearly visible.

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Raw materials: cement clinker, gypsum and also solid waste dei ¹ Asbestos cement product lon · They are continuously introduced through the doser into the system via the pin 1 (S ¹ Ig. 2) into the chamber 3 according to the arrow ^{n a "} Eierher is also called \ 7asser ge le It et.

The raw material composition is as follows:

97 to 98 parts by weight of cement clinker, j

2 to 3 weight place plaster ' \

to 40 to pO part by weight of water \

The feed screw 1O; from an asbestos bunker asbestos in sighting of the arrow "b" (S ¹ Ig. 1): the chamber 5 of the system is continuously fed · the asbestos is _; In a LIenge 15 to 20 wt.% Of the cement ', gypsum and £ ^r assarijefticht taken. The amount of water supplied together with the asbestos is regulated so that the finished asbestos-cement suspension. has a humidity of 88 to 90 ^ 3 · Waste from asbestos cement production is added in an amount of 1 to 3 % by weight of the total weight of the raw material. Under the action of the dynamic pressure which is generated by the substances entering the system, and during the rotation of the housing 2 about its axis, the substances are displaced in the direction of the arrow "c" along the system axis. On their way from the peg 1 to the isle chamber 6, cement clinker, plaster of paris and solid waste are crushed in the hammers 3 and 4 in a white medium and turn into cement sludge, which, through the slit-shaped openings, forms the wall of the wall

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7 Ln the extinguishing chamber 6 arrives. This is also where the

5 via the central opening 20 in the Zwlschenkanmerv. ^: and 7 'dor asbestos fiberized in an aqueous medium. In the baby room

6 the cement slurry is homogenized with / defibrated asbestos, i.e. an asbestos cement suspension is prepared. The finished one The suspension is fed into the unloading connection via the openings 11 (Fig. 2) 15 poured, from where they are pumped to the Verbrauohsbehäitarn is promoted. If the system is longer in the event of a power failure than 1.5 to 2 hours is turned off, so the chambers 3 and 4, in which cement is crushed, washed out with "water ·

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Claims (9)

PiESIiTilTSHlüCHS P 56 o68 May 9, 1974 L / Br Process for preparing an asbestos-cement suspension by jointly grinding cement clinker and gypsum, fiberglass of asbestos and subsequent seeing the same, characterized in that cement clinker and The plaster of paris can be ground together in the previous medium. 2. The method according to claim 1, characterized that during the joint grinding of cement clinker and gypsum added waste from asbestos cement production vj he the, 3 · Plant for performing the method according to claim 1, characterized in that it is in one on pin (1) rotating cylinder housing (2) housed chambers (3 »4» 5jü2iä. 6) has, ^ two front of which an intermediate buyer wall and an outlet partition wall (7) with old slits own and represent a pulley drum mill (8), which is used to jecelnsainen Grinding cement clinker and gypsum into an egg aqueous Ledluia is used and which is attached to one of the front faces of the housing (2 connected, which is connected to a feed device for Sohstoffe is, while the third eacmer (5) »that of the ball mill separated by a partition (7 ') with a central opening (20) is and connects to the opposite housing face as well as with a snack (10) for .asbestos, as 409848/101 9 is used to shred asbestos, whereby the ICair.ner (5), which lies between them and for mixing the processed Components serves, in your walls at least two openings (11) for unloading the prepared suspension and a corresponding Has number of table scoops (12) which cover these openings, wherein the mixing chamber (6) m one fixed immovably Sheet metal body (14) with a discharge nozzle (15) is located. 409848/1019 Blank page