DE2041834C3 - Device for the production of white cement - Google Patents

Description

stand.

7 Device according to one or more of claims 1 to 6, characterized by vun Windows in at least one of the hoods blown on the inside by means of suitable devices or in manholes provided in the hoods to monitor the operation of the device

8. Device according to one or more of claims 1 to 7, characterized in that the speed of rotation of the tunnel (10) is about 3 to 6 revolutions per minute, preferably about 4 revolutions per minute.

The invention relates to an apparatus for carrying out the method for producing white Zeiuent according to DT patent 1 942 537, in which the Starting material processed into a homogeneous, paste-like mass, the mass obtained Burned in a reducing atmosphere to a very porous clinker and the clinker obtained is crushed and cooled in intimate contact with a reducing gas, the at Crushed at a temperature of 1000 to 1450 C. Klink «., In a reducing atmosphere within from 1.5 to 6 minutes to a temperature of about 700 to 1 HK) "C and then dei Clinker in a reducing atmosphere by spraying with water quickly to a temperature of cooled to about 300 ° C and then collected in the open air, with contact with the reducing atmosphere during the two cooling steps with exclusion of oxygen to a / conveying the clinker forward, compared to the horizontal inclined vibrator.

With a device described in the main patent application for carrying out this process, a very white clinker can be obtained which, like that made from this clinker, Zciiicni cinCii Lcüchiwcrt vcn S7 b; s 00 (according to the standard * "of the Comite International de 1'EcIairage , where the value 100 is set for magnesia vapor) for a specific, so-called Blaine surface area of 3000 cm ² / g, starting from a medium-quality clinker Favorable operating conditions obtained, but it has been shown that the general economic efficiency of the device according to the main patent application and the luminous value of the clinker achieved with it can still be improved.

Surprisingly, the device described here can not be maintained in the case of any vibrations will need and in which the resulting wear and tear of the device does not apply, and in which furthermore no auxiliary devices for stirring the clinker are required very simple way very well sealed, even better than the device according to ler teaching of the main patent application. In particular, i d b succeeds

During the forward movement of the clinker through the upper and lower chambers miltels a Rüttelgestells and conventional known arrangements for transmitting vibrations to the Rüttelgestell and by means of some at the bottom of the box formed in steps ^f örmiger against each other ■ replaced arranged platforms is carried out at specified in the parent patent application device, , will the

stated object in the inventive process

Seal solved in that the vibrating device io with the device according to the invention is formed into an upper and a lower carnation, surprisingly, a clinker with all Körtes rotary tube, which is about 0.5 4is 2 ° / inside, small or large The end product is inclined practically against the horizontal, and it is essential to obtain complete homogeneity. Demented upper inlet end of the clinker mit-. c -.... r decomposition are speaking quite a number of advantageous size reduction device by a deer: - ^ 15 jführbar improvements over the Hauptpatentanmeljst. under which a nozzle for the 7n, '. ini a reduction is achieved, in particular the color flows into the upper kn-mcr by lessening gas, that it is one point better than the provision for the subdivision of the Dr. Rohrcs a transverse bulkhead according to the main patent application. is provided approximately in the middle, the openings to the following is an embodiment of the

having convey through the material, and that the 20 invention with reference to the drawing η individual be-rotary tube at the upper and lower end medium * spelling, where represents

ben opposite the tube or opposite a Kl. I the Vorrichrme according to the invention in

keratvugsvorrichtung at the lower end of the rotary schematic representation,

rohrjs is sealed, the hood at the bottom Fig. 2, the device according to the invention in the

End spray nozzles for the controllable supply of 25 Draufsichi and Has coolant in the lower chamber. Fig. 3 is a vertical section along the

According to a preferred embodiment of the line IH-III from Fi g. 2

Invention is provided that the upper and lower The device has a Zerkkinerungsvorrich-

Chamber separating transverse bulkhead made of refractory material 3 of which consists in the main patent application berial and near its circumference at least one type specified. the general axis of which has hori-opening. It is also recommended that it is zontal. At the exit of the comminution device that crosses the upper and lower chambers, a tube 3 is arranged, through which the bulkhead consists of refractory material and at least two of its lower walls 4 pass through a nozzle 5, at least two in the circumferential direction, symmetrical in the case of the The embodiment shown extends horizontally and downstream zontally by opening 33 inclined preferably by 45 '. The nozzle 5 is via a pipe 6 with gene. Another feature can be connected to a propane gas burner 7, so that the openings are deflecting device *. !!. the nozzle reducing gases at a temperature, preferably in the form of a blade, which is from 1100 to 1400 ^! C assume which are necessary there. on the upstream side there is one in order to bring the crushed clinker to a tempea-> larger amount of material into the corresponding opening 40 door between about 1200 and 1300 ° C., and on the downstream side the end of the nozzle 5 is through a ^c chirm 8 dic off opening must be kept free and the Künkerbö ^ chung covered, which prevents "ie vnn is clogged 3 falling clinker from the defer. tubes. the nozzle

The nozzles for introducing the reducing agent can be inclined about 45 against the tunnel wall Carry gas into the chamber at their ends to prevent clogging, a protective screen. / \ ls gas is more advantageous- The tube 3 leads into a tunnel 10th which

wisely used propane. The nozzles can face down against its longitudinal axis at the bottom shown be inclined to the risk of clogging guide example is inclined by 0.5 to 2 ° Ό; the avoid clinker dust on the nozzles. Tunnel 10 lies on rollers 9, which it into a

The device can also measure temperature from 2 to 8 revolutions per minute VerDf fi d il l i i i

g p

having devices for the steam atomized from medium ^"1 of the nozzle water has been formed. Meßvorrichtur.gen which are in operative connection with the WasserzufuhrstcuLrung.

It recommends sir'i finer, dosed from the inside Devices blown windows in at least one of the hoods or in provided in the hoods To arrange manholes in order to monitor the device during operation can.

The speed of rotation of the rotary kiln can be 2 revolutions per minute, preferably about 4 revolutions per minute.

The comminution device can be of conventional

g g

set. The inner wall of the tunnel is provided with a refractory lining 11. At its upper end the tunnel IO a ftaune il in a rotary connection 13 carries, wherein the sealing Γ · 5 10 and the fixed part 14 is ensured by baffles 15 between the rotating tunnel.

In the tunnel 10, at a distance from the tunnel entrance, there is a transverse bulkhead 16 made of refractory material t-.ngeord- ^6o net, which is at an equal distance from the tunnel ends up to 8. The transverse bulkhead 16 divides the tunnel 10 into an upper, upstream chamber 16 and a lower, downstream chamber 18

lh dih id d b

gg schott 16 has two g

Be of construction and is temperature resistant up to about 05 openings 19, 20, which are identical and

1400 ° C. For this part, the axis 10 of the tunnel is preferably symmetrical

Device are the construction described in the main patent. The axes 21 of the openings 19, 20 are around

kind used. about ^ -5 ' inclined to the axis 1O _1. The opening

5 '6

Gen 19 and 20 have between 5 and 7 minutes over their entire length. During his

same cross section. The clinker was contained in the upper chamber

One or more windows, not shown, are agitated and the effect of the reducing

provided which are blown with air exposed to gases. The temperature of the clinker dropped

monitoring and observation by the S is only about 1 (JO ⁰ C

enable clear window. Accordingly, the temperature of the

In a lower hood 29 are a number of clinkers as it enters the lower chamber

The 25th at the shown play-six. still around 1100 ° C. 'Then the clinker

in the vicinity of the upper wall of the tunnel 10 intensively sprayed with water, and / was with about

yelled at, which, for example, on joints ίο 100 1 per minute, which makes his temperature very

are stored. Each nozzle is quickly lowered to around 250 to 300 C via a water pipe. The Ab-

25, water / ugctuhrt Each nozzle is on / on medium, cooling takes place homogeneously, caused by the

A valve 26 is controlled: the water supply is agitated as a result of the rotation of the tunnel.

carries a \ entil 27. fs xmil taps 28- In the lower chamber the ^ Vnker stayed the same-

gesehui. around the lempe atur at the exit de ·. Fall about 5 to 7 minutes.

/ Hues of the hood 29 of the chamber 18 either continuously The steam temperature (250 C at normal Bc-

iiviKι borrowed or periodically and accordingly drove) was than the temperature of the clinker pro-

aiiti'.matisch or flour automatically measure / u uses proportional parameters. The water supply

konni.il. The temperature values that were removed were generated in accordance with this steam temperature

compared with a given value. The ab- 20 discontinued

weieliuiiL'en the actual temperatures or that into the upper chamber by one or more

ilm * · mean value (determined in the usual way) of reducing gas entered from rere nozzles was of

this specified value are supplied by means of a propane gas burner and had the lol-

bek.i.nüLi devices, which are suitable for this purpose gendt-n volume proportions:

are used to regulate the water supply. CIe- 25 percent

In any case, the "lern- (_ () 10 to 14" prevailing in the tunnel) can be used

per.itur not only in the area of the deduction, but cq 5 to 9

can also be measured elsewhere in the chamber 18. (j, ~ traces

There>. The result of these measurements can be used for this purpose: H, I to 5

clet, the gas supply and / or the tun- 30 5 "about 0 5

nel to regulate the drive that sets it in rotation. (/ q cO, I 5 to 2

The lower exit 10., of the tunnel is from the

The clinker brick thus obtained had the following

a Drehverbinduni: 30 is in connection. Between- Composition (CJ weight percent):

see the tunnel and the fixed part (35 percent

masonry) is a dense ab- sjq 24 5 to 25 through baffles 31

sclihil'i guarantee '. A1., Ö 2.6 to 2.5

The tunnel 10 feeds at its exit 10., a Fe'.o! 0 3

or several conveyors 32. soft the treated, MgO 09

white and at a temperature of about 250 to 4 ° CaO 712 to 72 2

Pick up clinker that has cooled down at 300 ° C. The hood ΤίΟ., ΜπΟ. Cr., 0 0 47 to 0.070

29 is still tight with a trigger 33 on a ''

Throttle valve 34 to a device 35 for dust- The luminosity thus obtained was below these Collection attached. It was made with a precondition and when using the above arrangement worked of the type described, which 45 given units 89.

is characterized by the following quantities: Approximately 7 kg of propane per hour were used

total length of the tunnel 5700 mm, upper chamber needs, d. H. about two to three times less than at

29 (10 mm. Lower chamber 2800 mm. Diameter of the vibration device according to the main patent

] ft (lll mm. revolution of the shredding device registration.

speed: ⁷ O revolutions / minute. Rotation of 50 It should be noted that the inventive

Tunnel 2 to R turns; Minute. Device is easily accessible and that only

i.s it was found that this device is the most infrequently required interventions practically on the

Day 2nd delivers up to 350 t of white clinker, whereby the regulation of the water supply to the nozzles is limited.

a starting material with the following connections. With manual control this is about two to

set / uni: (percent by weight) was assumed: 55 required three times per shift. The reference group

is the temperature of the steam kept at 250 C

^r "f ^tn fes. namely for a clinker temperature at failure ¹

^{Sl <)} . ^cUva 14 to 15 of the device from about 150 C. It was the

Α '/) ·. about 0.6 Assumption confirms that this temperature is the

f'e_.O. about 0.2 60 temperature of the clinker at the exit of the device

⁽ · ^{Ι (>} anticipates about 4ti to 47 by about 15 minutes.

^Ml '° ^Ltwa ' In the cooling chamber there was no flooring

Ci) (as carbonate, about ^ increased by deposition.

i; s it can be stated that the device is very good

Dv ■ Clinker was sealed to a grain size of 0 to 65. The clinker is rappelled homogeneously, now 1 roughly) crushed cools, and all grains have regardless of their

I) ■ ■ clinker brick Lc! An: Mc at a temperature of large the same color. The reinforcement of the whiteness

■ "·. 1 ii 111 <in the upper chamber there remained a degree is about a point, but it is a lot

more important in the medium color and in its regularity than in its under optimal conditions achieved maximum.

So it is with the device according to the invention would like to solve the given task and one

Making clinker and a very white cement. The device is slightly different depending on the requirements Set raw materials and always delivers a very with low operating costs white starting product.

For this purpose 3 sheets of drawings

«9 615/141

Claims (6)

Patent claims: 1. Device for carrying out the process for the production of white cement according to DT-Pateat 1942537, in which the starting material becomes a homogeneous, pasty !! Processed mass, the mass obtained is burned in a reducing atmosphere to a very porous clinker and the clinker obtained is crushed and cooled in intimate contact with a reducing gas, the clinker crushed at a temperature of 1000 to 1450 C in a reducing atmosphere within 1.5 to 6 minutes at a temperature of about 700 is brought to 1100 ° C and then the clinker in a reducing atmosphere by spraying with water rapidly to ^e: ne temperature is cooled from about 300 "C and then collected in the open air, wherein the contact with the reducing atmosphere during the two cooling steps takes place in the absence of oxygen on a vibrating device which is inclined towards the horizontal and which moves the clinker forward, characterized in that the vibrating device is divided into an upper (17) and a lower chamber (18 ) divided rotary tube (10) »formed M, which is about 0.5 to 2 ⁰ O against the H orizontal and is inclined at its upper inlet end of the clinker '' center of a crushing device (1) through r-ne tube (3) can be fed. beneath which a nozzle (5) for the supply of a reducing gas opens into the upper chamber (17), a transverse bulkhead (16) having openings (19, 20) for conveying the material through is provided for dividing the rotary tube , and that the rotary tube (10) is sealed at the upper and lower end by means of hoods (12 and 29) opposite the tube (3) or against a clinker extraction device (32) at the lower end of the rotary tube, the hood ( 29) at the »lower end has spray nozzles for the controllable supply of coolant into the lower chamber (18). 2. Device according to claim 1, characterized in that that the upper (17) and lower chamber (18) separating transverse bulkhead (i6) consists of refractory material and near its periphery has at least one opening (19, 20). 3. Device according to claim 1, characterized in that the frequent (i /) and lower chamber (18) separating transverse bulkhead consists of refractory material and at least two circumferential, symmetrical and downstream openings (19, 20). 4. Apparatus according to claim 2 or 3, characterized characterized in that the openings (19, 20) deflecting devices, preferably in the form of shovels, have, which serve to hold a larger amount of material on the upstream side into the corresponding opening and on the downstream side the 6s to keep the opening free and to push out the clinker embankment. 5. Device according to one or more of the Claims 1 to 4, characterized in that the nozzles (5) for introducing the reducing Gas in the upper chamber (17) wear a protective screen (8) at its inner end. 6 Device according to one or more of Claims 1 to 5, characterized by temperature measuring devices (28) for the steam from the water sprayed from the nozzles (25) what devices have been formed in operative connection with the water supply control