DK153321B - RAW MIXTURE FOR MANUFACTURING CEMENT - Google Patents
RAW MIXTURE FOR MANUFACTURING CEMENT Download PDFInfo
- Publication number
- DK153321B DK153321B DK253777A DK253777A DK153321B DK 153321 B DK153321 B DK 153321B DK 253777 A DK253777 A DK 253777A DK 253777 A DK253777 A DK 253777A DK 153321 B DK153321 B DK 153321B
- Authority
- DK
- Denmark
- Prior art keywords
- calculated
- cement
- component
- crude mixture
- components
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
DK 153321 BDK 153321 B
Den foreliggende opfindelse vedrører fremstillingen af byggematerialer, og opfindelsen angår nærmere angivet en råblanding til fremstilling af cement.The present invention relates to the manufacture of building materials, and the invention more particularly relates to a crude mixture for the manufacture of cement.
Der kendes en råblanding til fremstilling af cement, bestående af kalkholdige, kiselholdige, aluminiumholdige og jernholdige komponenter og calciumchlorid, idet komponenterne er til stede i denne kendte blanding i følgende mængder: 2A crude mixture is known for making cement consisting of calcareous, siliceous, aluminum and ferrous components and calcium chloride, the components being present in this known mixture in the following amounts: 2
DK 153321 BDK 153321 B
Vægt-% kalkholdig komponent (beregnet som CaO) 52 til 65 kiselholdig komponent (beregnet som SiC^) 7,2 til 15,5 aluminiumholdig komponent (beregnet som A^Og) 20 til 35 jernholdig komponent (beregnet som Fe20g) under 2 calciumchlorid 2,6 til 5,2 tab ved calcinering resten.% By weight calcareous component (calculated as CaO) 52 to 65 siliceous component (calculated as SiC2) 7.2 to 15.5 aluminum containing component (calculated as A ^ And) 20 to 35 ferrous component (calculated as Fe2Og) under 2 calcium chloride 2.6 to 5.2 losses in calcining the remainder.
Denne kendte råblanding har visse ulemper, som beror på nødvendigheden af at udføre calcineringen af blandingen ved en temperatur i området fra 1300 til 1400°C, hvilken calcinering resulterer i fremstillingen af en cement med lav aktivitet.This known crude blend has certain disadvantages due to the necessity of carrying out the calcination of the mixture at a temperature in the range of from 1300 to 1400 ° C which results in the preparation of a low activity cement.
Et formål med den foreliggende opfindels er at overvinde de ovennævnte ulemper.An object of the present invention is to overcome the above disadvantages.
Den foreliggende opfindelse tager sigte på tilvejebringelsen af en sådan sammensætning for en råblanding til fremstilling af cement og indeholdende kalkholdige, kiselholdige og jernholdige komponenter og calciumchlorid, som vil gøre det muligt at udføre calcineringen af denne blanding ved væsentlig lavere temperaturer, således at der opnås en cement med høj aktivitet.SUMMARY OF THE INVENTION The present invention is directed to the provision of such a composition for a crude mixture for the production of cement and containing calcareous, siliceous and ferrous components and calcium chloride which will allow the calcination of this mixture to be carried out at substantially lower temperatures, cement with high activity.
Dette formål opnås med råblandingen ifølge opfindelsen til fremstilling af cement og indeholdende de ovennævnte komponenter, hvilken råblanding er ejendommelig ved, at den desuden indeholder en magnesiumholdig komponent, hvorhos komponenterne er til stede i råblandingen i følgende mængder: Vægt-% kalkholdig komponent (beregnet som CaO) 30 til 42,3 kiselholdig komponent (beregnet som Si02> 12,5 til 17,5 aluminiumholdig komponent (beregnet som AlgOg) 1,6 til 12,4 jernholdig komponent (beregnet som FegOg) 0,6 til 4,4 calciumchlorid 6 til 20 magnesiumholdig komponent (beregnet som MgO) 1,5 til 8 tab ved calcinering resten.This object is achieved with the crude mixture according to the invention for the manufacture of cement and containing the above-mentioned components, which is characterized in that it additionally contains a magnesium-containing component, the components of which are present in the crude mixture in the following amounts:% by weight of calcareous component (calculated as CaO) 30 to 42.3 silicon-containing component (calculated as SiO2> 12.5 to 17.5 aluminum-containing component (calculated as AlgOg) 1.6 to 12.4 ferrous component (calculated as FegOg) 0.6 to 4.4 calcium chloride 6 to 20 magnesium-containing component (calculated as MgO) 1.5 to 8 losses by calcining the residue.
Råblandingen ifølge opfindelsen gør det muligt at nedsætte cal-cineringstemperaturen til 1000 til 1100°C og derved opnå en cement med høj aktivitet (således ligger trykbrudstyrken for prøvelegemer bestående af 1 vægtdel cement, 3 vægtdele kvartssand og 0,5 vægtdele vand, efter 28 dages hærdning i vand ved en temperatur på 20-2°C, i området fra 500 til 650 kgf/cm . Prøvelegemerne har en bjælkelignende form med dimensionerne 4x4x16 cm.The crude mixture of the invention allows the calcining temperature to be reduced to 1000 to 1100 ° C, thereby achieving a high activity cement (thus, the compressive strength of test bodies consisting of 1 part by weight of cement, 3 parts by weight of quartz sand and 0.5 parts by weight of water, after 28 days curing in water at a temperature of 20-2 ° C, in the range of 500 to 650 kgf / cm.The test bodies have a beam-like shape with the dimensions 4x4x16 cm.
Som følge af tilstedeværelsen af calciumchlorid i råblandingenDue to the presence of calcium chloride in the crude mixture
DK 153321BDK 153321B
3 i en mængde på fra 6 til 20 vægt-% sker klinkerdannelsesprocesserne i en saltsmelte og fuldendes ved en temperatur i området fra 1000 til 1100°C. Tilstedeværelsen af en magnesiumkomponent i råblandingen sikrer stabilisering af det fra calcineringen af råblandingen hidrørende stærkt basiske calciumsilicat i en form med høj hydratiserings-aktivitet.3 in an amount of from 6 to 20% by weight, the clinker formation processes take place in a salt melt and are completed at a temperature in the range of 1000 to 1100 ° C. The presence of a magnesium component in the crude mixture ensures stabilization of the highly basic calcium silicate resulting from the calcination of the crude mixture in a form of high hydration activity.
Den omhandlede råblanding til fremstilling af cement fremstilles ved adskilt eller samlet formaling af udgangskomponenterne og homogenisering deraf (i tilfælde af adskilt formaling). Denne formaling kan udføres både i nærværelse af vand (vådformaling) og uden vand (tørformaling). Ved vådformaling tilsættes der vand i en mængde på fra 25 til 35 vægt-% beregnet på totalvægten af udgangskomponenterne. I tilfælde af vådformaling af udgangskomponenterne kan calci-umchloridet anvendes som et tørprodukt eller som vandige opløsninger med den nødvendige koncentration. Efter tørformaling kan den opnåede råblanding granuleres under tilsætning af vand i en mængde på fra 6 til 9% til opnåelse af pellets med en diameter på 5 til 20 mm.The present raw composition for the manufacture of cement is prepared by separating or aggregating the starting components and homogenizing them (in the case of separate milling). This grinding can be carried out both in the presence of water (wet grinding) and without water (dry grinding). In wet milling, water is added in an amount of from 25 to 35% by weight based on the total weight of the starting components. In the case of wet milling of the starting components, the calcium chloride can be used as a dry product or as aqueous solutions of the required concentration. After dry milling, the crude mixture obtained can be granulated with the addition of water in an amount of from 6 to 9% to obtain pellets having a diameter of 5 to 20 mm.
Cementklinker fremstilles ud fra den således fremstillede råblanding i form af råmel, granuler eller råslam (råblanding med vand), der indføres i en varmeenhed, hvori calcineringen udføres ved en temperatur i området fra 1000 til 1100°C. Til fremstilling af cement udtømmes klinkerne fra varmeenheden og formales. Under formalingstrinnet kan der inkorporeres visse tilsætningsstoffer i klinkerne, såsom gips eller et aktivt mineraladditiv, for at bibringe cementen visse specielle egenskaber.Cement clinkers are prepared from the crude mixture thus produced in the form of crude flour, granules or crude sludge (crude mixture with water) which is introduced into a heating unit in which the calcination is carried out at a temperature in the range of 1000 to 1100 ° C. To make cement, the clinkers are discharged from the heating unit and ground. During the grinding step, certain additives can be incorporated into the clinker, such as gypsum or an active mineral additive, to impart certain special properties to the cement.
Calciumchloridet, der er en komponent i råblandingen ifølge opfindelsen, kan anvendes både i ren form og i form af en calciumchlo-ridholdig komponent. Denne komponent kan indføres i råblandingen enten ved formalingstrinnet for komponenterne eller indføres i calci-neringsvarmeenheden adskilt fra de øvrige råblandingskomponenter, som indføres i varmeenheden. Herved foretages indføringen af calciumchloridet og indføringen af en blanding af øvrige udgangskomponenter kontinuerligt.The calcium chloride, which is a component of the crude mixture of the invention, can be used both in pure form and in the form of a calcium chloride-containing component. This component can be introduced into the crude mixture either at the grinding stage of the components or introduced into the calcination heating unit separate from the other crude mixing components which are introduced into the heating unit. In this way, the introduction of the calcium chloride and the introduction of a mixture of other starting components are carried out continuously.
Opfindelsen forklares nærmere ved hjælp af de efterfølgende eksempler, der belyser fremstillingen af den omhandlede råblanding og fremstilling af cement herudfra. I alle eksemplerne er cementens aktivitet karakteriseret ved trækbrudstyrken ved bøjning og trykbrudstyrken som defineret for prøvelegemer med dimensionerne 4x4x16 cm, bestående af 1 vægtdel cement, 3 vægtdele kvartssand og 0,5 vægtdele vand, efter 28 dages hærdning i vand ved en temperatur på 2oi2°C.The invention is further explained by means of the following examples which illustrate the preparation of the present crude mixture and the manufacture of cement therefrom. In all the examples, the activity of the cement is characterized by the tensile strength of bending and the compressive strength as defined for test bodies having the dimensions 4x4x16 cm, consisting of 1 part by weight of cement, 3 parts by weight of quartz sand and 0.5 parts by weight of water, after 28 days of curing in water at a temperature of 2 ° 2 ° C.
DK 153321BDK 153321B
44
Eksempel 1Example 1
Der fremskiiies med fjende sammensætning: Vægt-% calcit (beregnet som CaO) 30 kvartssand (beregnet som Si02) 16 kommercielt aluminiumoxid (beregnet som A^O^) 2,4 hematit (beregnet om 0,6 kemisk rent calciumchlorid 18,8 magnesit (beregnet som MgO) 8 tab ved calcinering 24,2.Enemy composition is produced: Weight% calcite (calculated as CaO) 30 quartz sand (calculated as SiO 2) 16 commercial alumina (calculated as A 2 O 2) 2.4 hematite (calculated as 0.6 chemically pure calcium chloride 18.8 magnesite) (calculated as MgO) 8 losses on calcination 24.2.
De ovennævnte komponenter formales sammen til opnåelse af en rest på højst 10 vægt% på en sigte med en huldiameter på 80 μπι. Den opnåede råblanding granuleres til pellets med en diameter på fra 10 til 15 mm.The above components are ground together to obtain a residue of not more than 10% by weight on a sieve with a hole diameter of 80 μπι. The crude mixture obtained is granulated into pellets having a diameter of 10 to 15 mm.
Den granulerede råblanding indføres i en ovn, hvori der foretages calcinering ved en temperatur på 1100°C, indtil klinkerdannelsesprocessen er fuldendt. Til fremstilling af cement udtømmes klinkerne fra ovnen og formales sammen med et tilsætningsstof bestående af gips-dehydrat (3 vægt-% beregnet som SO^ og beregnet på vægten af klinkerne) . Finheden af det formalede produkt karakteriseres ved en rest på højst 15 vægt-% på en sigte med en huldiameter på 80 μια.The granulated crude mixture is introduced into an oven in which calcination is carried out at a temperature of 1100 ° C until the clinker formation process is complete. For the manufacture of cement, the clinkers are discharged from the furnace and ground together with an additive consisting of gypsum dehydrate (3% by weight calculated as SO 2 and based on the weight of the clinker). The fineness of the milled product is characterized by a residue of not more than 15% by weight on a sieve with a hole diameter of 80 μια.
Den således fremstillede cement har følgende egenskaber: 2 trækbrudstyrke ved bøjning, kgf/cm 59 2 trykbrudstyrke, kgf/cm 442.The cement thus produced has the following properties: 2 tensile strength at bending, kgf / cm 59 2 compressive strength, kgf / cm 442.
Eksempel 2Example 2
Der fremstilles en råblanding med følgende sammensætning: Vægt-% marmoragtig kalk (beregnet som CaO) 33,26 diatoméjord (beregnet som S1O2) 13,84 kaolin (beregnet som A^O^) 6,99 pyrit-slagger (beregnet som Fe202) 2,99 kommercielt calciumchlorid (beregnet som CaC^) 10,0 magnesit (beregnet som MgO) 4 tab ved calcinering 28,92.A crude mixture of the following composition is prepared:% by weight of marble-like lime (calculated as CaO) 33.26 diatomaceous earth (calculated as S1O2) 13.84 kaolin (calculated as A ^ O ^) 6.99 pyrite slag (calculated as Fe2O2) 2.99 commercial calcium chloride (calculated as CaCl3) 10.0 magnesite (calculated as MgO) 4 losses on calcination 28.92.
Formalingen af de ovennævnte komponenter, granuleringen af den opnåede råblanding og calcinering deraf, samt formalingen af cementklinkerne udføres på analog måde som beskrevet i ovenstående eksempel 1.The milling of the aforementioned components, the granulation of the crude mixture obtained and its calcination, as well as the milling of the cement clinkers are carried out in an analogous manner as described in Example 1 above.
Den således fremstillede cement har følgende egenskaber: 5 2The cement thus produced has the following properties: 5 2
DK 153321 BDK 153321 B
trækbrudstyrke ved bøjning, kgf/cm 72 2 trykbrudstyrke, kgf/cm 573-tensile strength at bending, kgf / cm 72 2 compressive strength, kgf / cm 573-
Eksempel 3Example 3
Der fremstilles en råbkanding med følgende sammensætning: Væg;t-% kridt (beregnet som CaO) 42,,3 kvartssand (beregnet som SiO^j 12„ 5 kaolin (beregnet som A^Og) I2„ 4 slagge med højt jernindhold fra kobbersmeltning (beregnet som FegOg) '4,4 kommercielt calciumchlorid (beregnet som GaClg) 35,,0 periclas (MgO) 31,, 5 tab ved calcinering ZD„ 9.A crucible is prepared having the following composition: Wall; t-% chalk (calculated as CaO) 42, 3 quartz sand (calculated as SiO 2) 12 kaolin (calculated as A ^ And) I2 "4 slag with high iron content from copper smelting (calculated as FegOg) 4.4 commercial calcium chloride (calculated as GaClg) 35, 0 periclas (MgO) 31, 5 losses by calcination ZD 9.
Disse komponenter underkastes vådformaling. Herunder indføres calciumchloridet i formalingstrinnet i fom af en 20%'s vandig opløsning. Det formalede produkt fyldes i en roterovn, hvori der foretages calcinering af råblandingen ved en temperatur på 1000°C i 1 time. De opnåede cementklinker udtømmes af ovnen og underkastes formaling. Den endelige cement har følgende egenskaber: trækbrudstyrke ved bøjning kgf/cm '72 2 trykbrudstyrke, kgf/cm 612.These components are subjected to wet milling. Below, the calcium chloride is introduced into the milling step in the form of a 20% aqueous solution. The ground product is charged to a rotary kiln in which the crude mixture is calcined at a temperature of 1000 ° C for 1 hour. The obtained cement clinkers are discharged from the furnace and subjected to grinding. The final cement has the following properties: tensile strength at bending kgf / cm '72 2 compressive strength, kgf / cm 612.
Cement fremstillet til sammenligningsformål ud fra den samme råblanding, men uden periclas, efter samme fremgangsmåde, har følgende egenskaber: 2 trækbrudstyrke ved bøjning, kgf/cm 27 2 trykbrud s tyrke, kgf/cm 3.12.Cement made for comparison purposes from the same crude mixture, but without periclas, following the same procedure, has the following properties: 2 tensile strength at bending, kgf / cm 27 2 pressure fracture s Turkish, kgf / cm 3.12.
Eksempel 4Example 4
Der fremstilles en råblanding med følgende sammensætning: ^egt-% magnesiumholdig kalk beregnet som CaO 30,5 beregnet som MgO 3,6 løst sandblandet ler, beregnet: som Si02 317,5 som Α120^ 4,1 som Fe203 1,6 kommercielt calciumchlorid (beregnet som CaCl2) 220,0 tab ved calcinering 22,7.A crude mixture is prepared having the following composition: ^% by weight of magnesium-containing lime calculated as CaO 30.5 calculated as MgO 3.6 dissolved sand-mixed clay, calculated: as SiO2 317.5 as ^120 ^ 4.1 as Fe2 O3 1.6 commercial calcium chloride (calculated as CaCl2) 220.0 loss on calcination 22.7.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2398740 | 1976-08-20 | ||
| SU2398740 | 1976-08-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK253777A DK253777A (en) | 1978-02-21 |
| DK153321B true DK153321B (en) | 1988-07-04 |
| DK153321C DK153321C (en) | 1988-11-14 |
Family
ID=20674953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK253777A DK153321C (en) | 1976-08-20 | 1977-06-08 | RAW MIXTURE FOR MANUFACTURING CEMENT |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5325627A (en) |
| DE (1) | DE2722641C3 (en) |
| DK (1) | DK153321C (en) |
| FR (1) | FR2362091A1 (en) |
| IT (1) | IT1117953B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK155931C (en) * | 1976-08-20 | 1989-10-30 | Tashkent Ni I Pi Stroitel | CEMENT |
| DK153320C (en) * | 1976-08-20 | 1988-11-14 | Tashkent Ni I Pi Stroitel | CEMENT AND PROCEDURE FOR MANUFACTURING THEREOF |
| ES2223275B1 (en) * | 2003-06-27 | 2006-06-01 | Consejo Sup. De Invest. Cientificas. | NEW CLINKER OF BELIEF CEMENT OF FLYING ASHES, OF THE COMBUSTION OF THE HIGH CARBON CONTAINED IN CAL AND BELITICAL CEMENT. |
| CN116283004B (en) * | 2022-09-08 | 2024-04-12 | 中交二航武汉港湾新材料有限公司 | Full solid waste composite admixture for ultra-high performance concrete and concrete prepared from same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK296377A (en) * | 1976-08-20 | 1978-02-21 | Tashk | CEMENT AND PROCEDURE FOR MANUFACTURING IT |
| DK247677A (en) * | 1976-08-20 | 1978-02-21 | Tashk Ni | CEMENT AND PROCEDURE FOR MANUFACTURING IT |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372081A (en) * | 1972-02-15 | 1974-10-30 | Fujimasu J | Hydraulic composition |
| US4017744A (en) * | 1975-12-22 | 1977-04-12 | Westinghouse Electric Corporation | Digital firing pulse generator for thyristor power converters |
| JPS5929041B2 (en) * | 1976-01-12 | 1984-07-18 | 花王株式会社 | Antibacterial composition |
-
1977
- 1977-05-18 DE DE19772722641 patent/DE2722641C3/en not_active Expired
- 1977-06-08 DK DK253777A patent/DK153321C/en not_active IP Right Cessation
- 1977-06-09 JP JP6835677A patent/JPS5325627A/en active Pending
- 1977-06-20 IT IT4162777A patent/IT1117953B/en active
- 1977-08-18 FR FR7725309A patent/FR2362091A1/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK296377A (en) * | 1976-08-20 | 1978-02-21 | Tashk | CEMENT AND PROCEDURE FOR MANUFACTURING IT |
| DK247677A (en) * | 1976-08-20 | 1978-02-21 | Tashk Ni | CEMENT AND PROCEDURE FOR MANUFACTURING IT |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2722641A1 (en) | 1978-02-23 |
| DK253777A (en) | 1978-02-21 |
| FR2362091A1 (en) | 1978-03-17 |
| DE2722641B2 (en) | 1981-02-19 |
| IT1117953B (en) | 1986-02-24 |
| DE2722641C3 (en) | 1983-12-01 |
| JPS5325627A (en) | 1978-03-09 |
| FR2362091B1 (en) | 1980-06-20 |
| DK153321C (en) | 1988-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO139347B (en) | HYDRAULIC CEMENT CONTAINING BETA-C2S AS A MAIN COMPONENT, AS WELL AS A FOOD MIXTURE AND PROCEDURE | |
| DK155185B (en) | PROCEDURE FOR THE PREPARATION OF A BINDING FOR USE IN SUSPENSION, MOLDING OR CONCRETE | |
| CA1335298C (en) | Cement compositions | |
| KR101801966B1 (en) | A Solidification Agent Comprising Acid-Treated Waste Oyster Shell And Construction Method Using The Same | |
| JPS6336840B2 (en) | ||
| DK153321B (en) | RAW MIXTURE FOR MANUFACTURING CEMENT | |
| DK153320B (en) | CEMENT AND PROCEDURE FOR MANUFACTURING THEREOF | |
| US4115138A (en) | Raw mixture for the production of cement | |
| US4119467A (en) | Cement and process for producing same | |
| KR101306182B1 (en) | Plenty of recycling aggregate and environment-friendly block for shore protection binder composition | |
| DK155931B (en) | CEMENT | |
| RU2619566C1 (en) | Ceramic mass | |
| RU2049081C1 (en) | Expanding addition to cement | |
| US3897258A (en) | Refractory siliceous cements and their method of production | |
| JPH11292578A (en) | Belite slag | |
| US2089970A (en) | Merwinite refractories | |
| KR20050051768A (en) | Process of producing alumina cement clinker using refined slag | |
| KR101129393B1 (en) | Blast furnace slag cement synthetic method and blast furnace slag cement produced by this method | |
| KR20110085134A (en) | Cement admixture composite and manufacturing method for the same | |
| DK153463B (en) | CEMENT AND PROCEDURE FOR MANUFACTURING THEREOF | |
| SU973496A1 (en) | Method for roasting raw mix | |
| RU2648131C1 (en) | Ceramic mixture | |
| JPH02267142A (en) | Production of cement clinker | |
| DK152112B (en) | METHOD OF MANUFACTURING CEMENT | |
| RU2101247C1 (en) | Feedstock mixture for producing cement clinker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |