SU1280839A1 - Method of cooling cement clinker - Google Patents

Abstract

A COOLING CLINKER COOLING METHOD by blowing cooling air through a layer of clinker and supplying a moist mineral additive, characterized in that, in order to increase the chemical activity of the mineral additive and the productivity of the furnace, the mineral additive is fed towards the cooling air.

Description

N5 00

00 H3o6iieTe me relates to the industrial use of construction materials networks, mainly to the methods of cooling cement clinker. The aim of the plant is to increase the chemical activity of the mineral additive and furnace productivity,; The proposed method is carried out as follows. Miner alnun), an additive with a moisture content of 5–20% of uninterrupted flow is fed to a layer of hot clinker in a clinker cooler in an amount of 20–90% by weight of the cooled material. In the case of etrm, the amount of solid coolant is determined by the formula N KD, where D is the amount of additive in the finished cement, set depending on its type and brand; To a constant coefficient determined experimentally. The mixture of clinker and mineral water supplements accumulate in silos (in intermediate warehouses), where they monitor the content of the mineral additive, finish the mixture with gypsum, and grind it. . .- .., -. N and m. E JS. At Kamenetz-Podolsk cement plant to obtain portland cement with mineral additives and slab-portland cement. Krivoy Rog home granules are used. They are dried, accumulated in the intermediate section, from where the cement melkshda is fed to the dosing device. Eschak is dried in the backfill in the fluidized bed of an autonomous drying unit. On drying 1 ton of shpak, on average, spend 17.5 kg of standard fuel, and the slag often has a residual moisture content of up to 5-2% .-. ,, The clinker at the plant is produced by burning raw mixes on a wet basis in powerful rotary kilns of 5x185 m, dreams of Volga / 5 CA clinker coolers. The hourly productivity of rotary kilns averages 69.5 t / h. Refrigerators Volga 75 SA are respectively designed for cooling 70-75 tons / h of clinker. The cooling of the clinker in the grate cooler is carried out with air that is fed under the grate by a high-pressure fan with a pressure of JO-12 kPa. The temperature of the clinker that goes into the fridge from the cut-off of the furnace "leaves, When the Volga-75 SA clinker breaker works hard, the temperature of the clinker at the bottom of the fridge is about, and at the elevator the conveyor feeds the clinker into SILOS i20- | i 0C. Dried slag and cooled clinker are transferred to separate accumulative sllbs. In the winter period on. the plant enters the frozen slag and the aerofont drying unit is not able to completely dry the fabric. During storage, the syruko is compacted and metered. CL1-1nker is often loaded into an accumulation silo with a temperature of 10 ° C. The clinker and slag from the corresponding accumulative dumps padayug on the donor device, demolished the plaster and sent a cement mill. As a ready-made product, after grinding, the cement is prepared with the set-i content of cl-shker, slag and gypsum. I At Kamyanets-Podilsky Tsamgn; ohm plant.was tested suggesting the best way to quickly cool bulk granular material for the environment ..: linker in the refrigerator. In the shchggystvo o-cold, the use of the granulated granulated fiber was 10%, the blast-furnace slag was fed to a 0 p dispenser using a conveyor belt, its device3 installed alongside a sludge shaft of a clinker cooler. The continuous stream of shgads passed through the metering device along the inclined tray and into the airtight shaft of the cooling chill and was evenly distributed on the layer of red-hot, clinker poured from the edge of the furnace. Thus, direct contact of the wet saw (solid stunner) with red-hot clinker was made. The temperature of the clinker leaving the kiln was P501200 ° C, the temperature of the clinker when cooled only with air, around the second window of the refrigerator is S50 ° C5 and the output of the chiller is about 200 C. When the slag is supplied s, the refrigerator is 40 t / h according to the proposed method, the temperature of the material in the region, the second window ho1: the single unit was .BOS-o, 3 per hour one cold etUlNic: - uQ-SG Wet ffiijastj kg. .ajJev New name & p., oopasyc-T to "lnp; h; - layer one hundredth above the log: lr1 nssGy,; Kl; gngsernyh grezul, Irip ;;, d4. ; /i-.l. (itiBKce drsblS (1h hour; .. ;; g, j cherg kng. Ia 1a-1g of part 11 I-packy cut ps-guch flow: Zorchch: -you zdozduh form; ssf n zone n "- With the help of an iklontsgg; gfsbsotbornik, gsgavl-ennogo in the vertical of the fusion charge of the refrigerator, it was possible to determine that the flow of matter: a, carried away by the furnace with atoric air, Aocvavaar 10 kg / min. -ce well to ob / kigayem / (shriario n jo not specakk; 1I,, -shche fractions n: lg-ka enters into a reaction) with jcriH; icf p :: v. melt, will form an additional: from clinker. When you make a prom and the rcToxot of Btorichno1o air s pachts io: and Cy is about 20% of the weight of the shlak. from g, -: g chat on a dry slip) / supplied by a click 1; Eriy cold chgtgP1k. i5OC from the furnace. rv naMeinrbiM, Odyov; 1mek o is observed irappipp, 1 and compacted 14 oSm.zg; i. vo ii; Ti.f; shevt resistance of the futhersthl ghvcha, NRpriner ,, with feed -..-.- - .. OLS dyutyshk AO t pshaka h with udedi- :; Purified lzch “75O3pO4; j a from 69.5 to 76.8 t / h, chuo with nekzn: P. RUSH1: de topshiva., 1O cr. -yle: ---; exOccount. and -i 0%, Ili-y prozvodsttichich. ;;::.:; g, gtalk;; x with noMOK, bio tcloxugo npCircoTufpi-iiKa clarified depending: mos7b ko / sictoka. .N..; Sector: With nsoO, go to ayudavat z hspodi.chnik, pyszchigi zankss sosder; p ;, alie gpaha D in the finished product - shtems-ntsnyy shyusts. ISG 1TVN ;; I PEDTzerag-ITI; -iTO this dependency of the spr-unit for:: • a team of N CD Dgg four of the four, and:; 5x185 m is more pleasant the value of K L2 After contact with pac:;. Alc; u.-. ker 3 hodody5; - ;: all ss-; ag; pa s.; 1 part of the blast-granulator-annegoesque undergoes the structure of we from scientific research institutes - the original grafted evil zskovpo ;. Gdrostavlzn glass sang: govogo. composition. The thermal shock of the girl-calfikatzyk slag ryzhogkoyla thermally in the glass stack: tb-i pvavdovollastonit (a - CaOSiO,) t; belitopodonnap phase (--ZCaO-SiO.), About this cd; adetelst. s.ina srai infrared infrastructural 17 len7.tenogranm;: ro5 tlag.sg,; JTf; 6paHHbi; j to n -usle-erg-tobrSot - slag kn E clinkers.-; cold water. On infrared spectrograph pr.ob germobrkbop antioro 1:;: the bottom of the characteristic bands .iViH s-CaOi: .0 n 960, n: 05 set STRIP; Belitoko typical phase is 850 and 520 cm. Pa petiTreiiorpabfMax sotsvg cvryfo; .. samples ha aka og ;-) e ayts with lime. .; - ynnipei-iirae ..15KPnya ar; c - :; y yu characteristic. slp psindosollastokita phase. pacc-OKHiJc; i.3,2; , P. 7 L. Otsugstvye dk .; ;.; - u: oz :: a.1- | ;; og;: one of the fcccls ::;: g .n-- ;; : B - :: t;.: -,; cha; cho-ig.-1-esiv.r.:,;, ...: ts,: th s.az 1P1 uncTiio .ch. Kok, Upgipe) Diffracconi ::: g-% lssi; - $ ops 1.o-igg;.; iC sbu; aeT for urine psvSChOGO .: defects; the nature of the crystals lcg x x K1Booiraz ;;; and with trr-; s: d; over slag. Consequently, npeA-araeMbtn splicing clinker clinker at the same time (), cry, such a mode of thromoo processing: i; i; with with goklo; pi; iz chascht,; o., that obrs :: a-ui; ,; V. i CJIji U: 1 li-iC iiMIi P P KOI aKiIlBVIOCTH shg.isa, Oto nodt1 er; gg; is great .ag-G; - noi,:; ib.i (} iHH Ca (OI) 2 .. which OKavajiOCb is much more. EivCOKn i for; thermoelectric heater; boats of heating, ayes lz; il; o1 ;; prydlI rgzud1tote to gg ;; oGo method; 7 (: i; r LuaeTC x; mi - ;; s; ;. that pa :: odd l-sai aP v ;; Diiocib pl ;; nfii.; ir ::; -a; strength.JOe GR - iJ; CiniC in other characters: Portland tent with 1.; lper. -: Lnn; .P: dob: .a): g; l.pkoportl, 1kd: 1gme-1ta. Co-ep ,, .. with odg; 1acc M with -rgglty, and accounted for by the predigate crraci.-P ; -, otlichglsts nktenCHBiibD.; iiapacT Ki eM npo4HocTit w, stretched for more than 3 days, and their activity 73 28 -; - 5g average age; - by 2.5-3.0; Pa, than ieMaiiToBs ob; h; th way .. From -5 nOi.b: r: icHi; e strength of seh.-HLOR demelt i; oc; i.e. At the same time, the processing of 1: ri about; weakly: method of the proposed method, tests showed that the supply of slag; in the cold field; ik ir ir o to receive half of the slag .-; with a clliser, with a "shm. granules clinker" and a small shot of its color and color (become lighter). and it is easier to grind, otsdilee) and it is easier to grind, Otodozirova, nka, syes, clinker with 1 dried slag at the plant began to accumulate in two layers - formerly kschinkernom. and yshakov, .It was done to create .re-; A supply of raw materials for grinding the cement and simplifying the cel-fi-firing scheme of the Mölschsch. - At the same time, during the entire industrial experiment, cement mills II was fed. Absolutely dry material at a temperature not of 40 ° C, which ensured a decrease in the temperature in the mill from 200 MO. :.; . .. l. . . Ifp.vi implementations, the proposed method of Dovbsty content t. Aka p cement to the required pre. . Deloz meets 1X standart requirements; . for Portland cement grade 400 with mineral additives from 16 to 19% teiH slag portland cement grade 400 from 35 to 45% and for slag portland grade 300, from 50 to 60%. If a. earlier the slag was contained in cement, which was taken out of the mill, fluctuated within i.455% 9 then during the implementation of the pre-Lagaemog at the expense of the Best average, it decreased to .tOje ;,

To check the thermoactivacin slag when it is fed towards the flow of

cooling air on a layer of clinker in a Qwia kiln fridge. OToeiJaHa iroba charge with chutes of the refrigerator. Slag was extracted from this sample,

after rough grinding in Is3 ratio with VOLSKY sand, non-chestnut was made according to GOST 310.4-76,

The reference is tested for comparison. slag of the Krivoy Rog evod "The results of comparative tests of the predecessor in the table ..

Thermbyte Source Shdak% VyrovvSh1 Shpak,%

42.5

43.0

O (image 17, 5 races scattered)

ABOUT

36.0

Thus, the use of this method will increase the chemical activity of the mineral additive and the productivity of the furnace.

Claims (1)

METHOD FOR COOLING A CEMENT CLINKER by blowing cooling air through a clinker layer and supplying a moist mineral additive, characterized in that, in order to increase the chemical activity of the mineral additive and the productivity of the furnace, the mineral additive is fed towards the cooling air. ^f ¢ 28