PROCEDURE FOR THE PRODUCTION OF AN ACTIVE BELITZEMENTES AS WELL AS ARRANGEMENT FOR THE EXECUTION OF THE PROCEDURE
The invention concerns a procedure for the production active BelitzementesmiteinerFestigkeits Erhärtungszeit function, which corresponds to commercial cements, with a limewashing and pool of broadcasting corporations of the raw meal of 75 to 85 and one the Portland cement production appropriate heating gradients, a firing temperature between 1350 and 1450°C as well as a Sehnellkühlung (deterrence) with high cooling gradients, preferably in the temperature range 1350 to 1250°C as upper limit temperature and i000 to 800°C as lower limit temperature, as well as an arrangement for the execution of the procedure.
It is well-known to manufacture active Belitzement. Appropriate procedures for it are among other things into the DD-PS Nr.138197, Nr.139938, Nr.142704 and Nr.150883 descriptive. From the DD-PS I0 Nr.150883 a procedure for the production of Belitzement is well-known, with which the Silikatmodul of the raw meal is increased to 2 to 4. The rise of the Silikatmoduls has the consequence that the early strength of the Belitzementes is increased, and that the cooling gradient necessary with deterring can be reduced. In the DD-PS Nr.138197 a procedure for the production of Belitzement is described, which is characterized by that a raw meal with a limewashing and pool of broadcasting corporations from 75 to 85 after burning a stage cooling and/or a deterrence with high cooling gradients is preferably subjected, in the temperature range 1350 to 1250°C as upper limit temperature and i000 to 800°C as lower limit temperature. In accordance with the procedure the DD-PS Nr.142704 it is characterized by the fact that by lowering of the firing temperature on less as 1350°C the portion of the Belitklinkerkörner amounts to as 7 mm less than i0.
In addition it was already suggested that the Schnellkühlung takes place in an eddy gutter radiator. In addition it is however necessary that via a repeated partitioning of the air supply a classifying of the clinker is to take place at the same time.
A further suggested solution plans to supply the hot clinker stream Zumahlstoffe with substantially lower temperature and to give the entire material stream up of a second cooling stage 2s.
Another solution < to contents, with a ErhShung of the Silikatmoduls of 2 toward 4 with cooling gradients; To work 500 K/min.
Further was suggested increasing by attitude of an optimal content on not sulfatisch bound alkalis in the Belit clinker the early strength of the active Belitzementes.
The early strength of active Belitzement can be improved also by Zumahlung of EGR dust, raw meal, limestone u.ähnl, increased as well as the economy of the procedure altogether.
The technical realization of the high cooling gradients can take place further in a gravity feed chute radiator, whereby by an air shunt current of the clinkers one fractionates and the individual clinker parliamentary groups according to their middle grain diameter are flowed against. Thereby the necessary high accuracy of the flowing against conditions is unfavorable for achievement of sufficiently high retention times in the gravity feed chute.
From the DE-OS 2632691 and 2638708 it is well-known to add a marl raw material within the cooling range of a fuel plant (cooling zone in the furnace discharge, junction region between furnace and radiator and/or in the radiator) which is burned by the clinker warmth and thus even hydraulic characteristics attained.
Disadvantage that solution managing specified is the condition that the high-speed cooling procedure is reached only with sufficiently small clinker grains.
For the recovery of this lack the hot cutting of the clinker was suggested beginning bei1300°C under simultaneous Schnellkühlung in a percussion radiator. The primary clinker grain size does not play a role for the actual Schnellkühlung. Thereby the extremely high load of the material is unfavorable by heat and drift.
A goal of the invention is it to manufacture an active Belit clinker its strength development, in particular the early strength of the active Belitzementes, which Portlandzernent approximates and/or which late firmness exceeds.
The invention is the basis the task to reduce by new solutions in combination with well-known and/or already suggested detailed solutions the cooling gradients necessary for the deterrence range by material influencing control and at the same time for reaching high cooling gradients as well as for following cutting of the clinker favorable conditions up to create in particular regarding the KorngrSBe.
According to invention the task is solved thereby that in a first stage the Schnellkühlung (deterrence) in a fluidised bed > during a grain size minimization up l0 mm in diameter by a Praltzerkteinerung with simultaneous cooling and by attitude of the Silikatmoduls on; 2 toward 4 and the alumina module on < i and the further cooling in a second stage with usual cooling gradients take place.
The arrangement for the execution of the procedure is characterized by that a rotary kiln a Prallzerkleinerer and/or an eddy gutter radiator are downstream and the eddy gutter radiator a second radiator, for example a torque tube radiator.
By the combination according to invention of new solutions with already well-known detailed solutions a surprising effect entered the cooling gradients as well as the formation of smaller clinker grains regarding the strength behavior, the lowering.
Remark example the invention is to be described below on the basis a remark example more near.
In the design an arrangement of the individual aggregates is schematically represented for the execution of the procedure.
The burned Berlit clinker becomes from the rotary kiln --1-- with a temperature of over 1300°C an eddy gutter radiator --2-- given up. The eddy gutter radiator is subjected from downside with air. In the eddy gutter radiator a cooling of the Belitklinkers in the temperature range takes place 1350 to 1250°C as upper limit temperature and 1000 to 800°C as lower limit temperature with cooling gradients a g 500.
The eddy gutter radiator thereby the clinker with a grain size is preferably < 10 mm given up. Afterwards to it the cooling of the clinker takes place with usual cooling gradients.
As refrigerator thereby in particular a torque tube radiator serves --5-- od.dgl.
With a clinker portion with a grain - l0 mm is separated these from the clinker stream. In addition the clinker a separation organ becomes --3-- supplied, of that the Feinkorn the eddy gutter radiator and the coarse grain a Prallzerkleinerer --4-- one supplies.
According to the cooling effect in the Prallzerkleinerer --4--, which cooling air is likewise supplied, the cut up clinker the eddy gutter radiator becomes --2-- or directly the second cooling stage, the torque tube radiator, supplied, as cooling air dern torque tube radiator becomes --5-- Fresh air supplied. Of the exhaust air from the torque tube radiator --5-- becomes over an exhaust air duct a part the eddy gutter radiator and/or over an exhaust air duct --6-- the Prallzerkleinerer --4-- given up. Becomes simultaneous both aggregates to the necessary extent over the lines --8 and 9-- likewise fresh air supplied.
The exhaust air from the 1st radiator stage is led totally or partly by avoidance the high-speed cooling stage into the sinter stage, the rotary kiln.
A substantial characteristic of the invention consists of it, at the same time by material Einfluß4 {} the nahme portion of the clinkers with a diameter > to keep as small as possible 10 mm without mechanical cutting up.
It is already well-known that a raising of the Silikatmoduls from 2,0 to 2.5 contributes necessary cooling gradients toward preferably 3, 4 to the increase of the early strength as well as to the lowering for Belitklinker.
However it was found surprising that at same Silikatmodul as well as the values for the limewashing and pool of broadcasting corporations, typical for active Belitzement, a lowering of the alumina module < on; = - 1 both on the early strength of the cement positively affects itself and the cooling gradient to be lowered can and to an education of smaller clinker grains, than from the Portland cement admits, leads at the same time.
S0 with a Belit raw meal with the Moduli limewashing and pool of broadcasting corporations 80, Silikatmodul 2.8 and alumina module 0.75 as well as with a Sintertemperatur of 1350°C is > the portion of clinker grain; 10 mm thereby less than 10% amount to. The further arrangement of the procedure plans that with an addition of Zumahlstoffen with substantially lower temperatures into the first cooling stage and/or into the range of the percussion cutting, apart from the supply of colder air, which necessary cooling gradient is reached.
Altogether the effect of a self cutting of the Granalien reached by the cooling with high cooling gradients affects itself thereby favourably. This is valid for following clinker transport as well as the clinker grinding for the size of the Granalien with the further refrigeration process and also for the improvement.
In the design the material guidance is characterized by closed lines and the air circulation by broken lines in each case. An active Belite cement clinker is sintered at 1350 DEG C-1450 DEG C and is cooled in two stages, with rapid cooling (quenching) e.g. in a fluidised bed being obtainable at the first stage and/or any necessary minimisation of the particle size to </= 10 mm diameter by impact pulverisation with simultaneous cooling and/or adjustment of the silicate module and/or alumina module, and subsequent cooling taking place at the second stage with normal cooling gradients. Preferably the high cooling gradient stage occurs within the range 1350 DEG C-1250 DEG C as the upper limit and 1000 DEG C-800 DEG C as the lower limit. 1. Procedure for the production of an active Belitzementes by a firmness confirmation time function, which corresponds to commercial cements, by a limewashing and pool of broadcasting corporations of the raw meal of 75 to 85 and one the Portland cement production appropriate heating gradients, a firing temperature between 1350 and 1450°C as well as a Schnellkühlung (deterrence) by high cooling gradients, preferably in the temperature range 1350 to 1250°C as upper limit temperature and 1000 to 800°C as lower limit temperature, thereby marked that in a first stage the Schnellkühlung (deterrence) in a fluidised bed < during a grain size minimization on; 10 mm in diameter by a percussion cutting with simultaneous cooling and by attitude of the Silikatmoduls on > 2 toward 4 and the alumina module on < 1 and the further cooling in a second stage with usual cooling gradients takes place. 2. Procedure according to requirement 1, by characterized that before and/or in the first cooling stage Zumahlstoffe with substantially lower temperatures, for example ambient temperature, are supplied in adapted Kornfraktion. 3. Procedure according to requirement 1, by the fact characterized that only the over grain is separated - 10 mm in diameter from the clinker stream and is supplied to the percussion cutting. 4. Procedure according to the requirements 1 to 3, by characterized that the Silikatmodul is increased to 3.
Arrangement for the execution of the procedure according to the requirements 1 to 4, by the fact characterized that a rotary kiln (1) a Prallzerkleinerer and/or an eddy gutter radiator (2) and the eddy gutter radiator a second radiator, for example a torque tube radiator (5) is downstream. 6. Arrangement for the execution of the procedure according to the requirements 1 to 4, by the fact characterized that the rotary kiln (1) a separation organ (3) for the over grain of the clinker is downstream, which eddy gutter radiator (2) over a line for the Feinkorn with the separation organ (3) and by means of line over an adjustment organ or directly with the rotary kiln (1) is connected, by the separation organ (3) a line for the over grain to the Prallzerkleinerer (4) leads, across material lines of the eddy gutter radiators (2) and/or the Prallzerkleinerer (4) with the torque tube radiator downstream (5) is connected. 7. Arrangement according to the requirements 5 and 6, by the fact characterized that exhaust air ducts the material intake of the torque tube radiator (5) with the eddy gutter radiator (2) and/or with the Prallzerkleinerer (4) connects and to the exhaust air ducts by rule organs fresh air lines is attached.
CPC - классификация
CC0C04C04BC04B7C04B7/C04B7/3C04B7/34C04B7/345C04B7/3453C04B7/4C04B7/47YY0Y02Y02PY02P4Y02P40Y02P40/Y02P40/1Y02P40/10IPC - классификация
CC0C04C04BC04B7C04B7/C04B7/3C04B7/34C04B7/345C04B7/4C04B7/47C04B7/5C04B7/52FF2F27F27DF27D1F27D15F27D15/F27D15/0F27D15/02Цитирование НПИ
DD 138197 A1 SCHRADER RICHARD, et al 19791017DD 142704 A2 SCHRADER RICHARD, et al 19800709
DD 150883 A1 STARK JOCHEN, et al 19810923
DE 2651752 A1 CIMENTS FRANCAIS GUERVILLE SOC 19770526
DE 2827568 A1 PETERS AG CLAUDIUS 19800110