Raw materials for portland cement manufactury:
-
Limestone is a sedimentary rock, one of the main
cement components. For cement manufacture, marlaceous and porous limestones with low strength, not containing siliceous insertions are most suitable.
-
Clay is a finely dispersed sedimentary rock. For cement manufacture use is made of the following types of argillaceous rocks: clay, clay loam, clay slate, loess and loessial loams.
-
Mineralizing agents are raw materials taking part in
formation of clinker minerals during roasting. As mineralizing agents, in the cement industry use is made of calcium fluoride — fluoride CaF2, phosphogypsum, sodium silicofluoride Na2SiF6, apatite Ca(P04)3F, gypsum, etc.
-
Corrective additives: quartz sand, foundry flask, coke fines, etc.
-
Additives to be added to cement, while milling clinker: gypsum stone, blast-furnace granulated slag
Manufacture of portland cement
-
The portland cement manufacture process is constituted by the following operations:
-
Extraction of the raw materials;
-
Breakage, milling and mixing of the raw materials;
-
Roasting of the crude mixture in the rotary furnace
(clinker manufacture);
-
Fine milling of the clinker with the additives
(cement manufacture).
ATTENTION!
Prior to requesting the commercial offer, please, clarify the following issues, which you will have arising during construction of the cement plant:
-
Availability of the feasibility study to determine the location of the cement plant and the necessary efficiency.
-
Cement type which will be manufactured by you; it shall be done based on the availability in your region of the raw material stocks – clay, limestone, granulated slag, flue ash, volcanic cinder; which items on this list are available in the close vicinity. In case if you are going to import the raw materials, it shall be specified in the feasibility study.
-
Limestone stocks for at least 30 years located at a distance not exceeding 200 km from the cement plant site.
-
Availability of the chemical compositions of the raw materials, laboratory conclusions of the applicability of the raw materials for the cement manufacture.
-
Obtaining of the permits for construction of the cement plant.
-
Undergoing of the expert reviews and obtaining of the ecological licenses necessary for construction of the cement plant.
-
Availability in the location of construction of the cement mini-plant of possible connections thereof to the gas and power supply networks. It shall be necessary to find out at the electric and gas supply company if the necessary capacities can be allocated and to learn the connection cost.
-
Determine the preferable fuel type for the cement plant – natural gas, coal, diesel fuel, fuel transportation cost.
-
Availability of the necessary financing.
We strongly recommend that these issues shall be dealt by a specialist in the cement industry.
Miocom Company can undertake, if so agreed, settlement of the above mentioned issues.
The commercial offer for full-scale cement plants manufacturing portland cement is forwarded by request. In your request, please, specify the activity profile of your enterprise and the availability of the raw materials (limestone, clay, granulated slag).
If you want to receive a quotation - Complete the form below:
Technological process
The raw materials for the portland cement manufacture are extracted at quarries and are transported to the cement plant, where they are
broken in a roll-jaw or swing hammer crusher, following which the raw materials are milled in a ball or rolling mill. After it the pulverized raw
materials for portland cement manufactury are delivered by the conveyor line to the batching hoppers, from there they are fed into the mixer.
After the mixer, the pulverized raw materials (would-be portland cement) will be delivered by the conveyor line into the rotary furnace, where by
means of roasting, cement clinker is manufactured.
The finished cement clinker from the furnace will be delivered to the warehouse for storing clinker, blast-furnace granulated slag (if portland blast-furnace slag cement is manufactured) and gypsum.
Then the portland cement clinker and gypsum (portland cement) or clinker, gypsum and granulated slag (portland blast-furnace slag cement) through the batching hoppers will be fed into the ball or rolling mill, where by means of crushing to the specific surface of 3,000 cm2/g, cement of the set mark is manufactured. After it, the finished portland cement will be delivered by the conveyor line into the tank for storage (cement tank).
Following it, the cement is brought either on the line of pre-packaging into bags or big bags, or is shipped to the consumer into cement trucks in
bulk.
Construction stages of a cement plant
Opening of a cement plant with the efficiency of at least 250 thousand tons of portland cement per year takes minimum 2 years, and can include the following stages (if quarries are absent):
-
Purchase of quarries;
-
Geological prospecting;
-
Procurement of the equipment and machinery for the quarries;Laying of communications;
-
Laying of railways and motor roads;
-
Designing of the cement plant technologies;
-
Development of technological regulations of the cement manufacture;
-
Arrangement of logistics of supplies of the raw materials and finished cement;
-
Procurement of the cement manufacture equipment;
-
Capital construction;Installation of the cement manufacture equipment;
-
Commissioning of the cement plant;Economic calculation;
-
Planning of the sales of the finished cement;Personnel recruitment.
Miocom Industrial Company will construct a cement plant for portland cement manufacture at a beneficial price and within short terms for you.
Miocom Industrial Company proposes to construct a cement plant for you for the purpose of portland cement manufactury by dry-mix process based on the rotary furnace.
The manufacture is proposed according to the patented technology and with use of the equipment of the leading world producers.
Cement Manufacturing
