Ordinary Portland Cement (OPC) Type I - is an ordinary Portland cement (OPC) used for general construction purposes such as walls, floors, pavements, sidewalks, prefabricated elements, etc.

Sulfate-Resistant Cement (SRC) Type V - is a sulfate-resistant cement (SRC) used only in concrete structures that are exposed to severe sulfate reactions, but primarily where concrete is exposed to soil and ground water where a high sulfate content is present, in areas such as canal linings, culverts, etc.

The primary ingredient used in the manufacturing process of Portland cement is calcium silicate made with a combination of calcium, silicon, aluminum and iron. Producing cement that meets specific chemical and physical specifications requires skillful, technical and professional control of the manufacturing process.

Qassim cement operates a 4-component dry process plant. The basic raw materials are limestone, shale, iron ore and sand. The first step in cement manufacturing is the quarrying of limestone. Limestone is blasted by means of a dynamite charge. The blasted material passes through the mobile crusher resulting in material sizes of 1-inch diameter or smaller. Other raw materials such as shale and sand are also available at our on-site quarry. Iron ore is supplied and transported to the plant by various haulers.

After the raw materials are stockpiled and analyzed, they are then proportioned to meet the desired chemical composition. The proportioned materials pass through the raw grinding mill and the resulting product is raw meal, blended together and then fed into the kilns.

The plant operates two rotary kilns. The rotary kiln is a slowly revolving cylindrical tube, inclined to a horizontal and in-lined with refractory materials. Fuel, such as crude oil is fired at the discharge-end of the kiln and at the flash furnace (FF). This is in counter current flow with the raw materials. The raw material passes through different zones in the kiln, at a rate controlled by the slope and rotational speed of the kiln, where it undergoes a chemical and physical change through the actions and reactions of intense heat inside the kiln.

The intense heat drives off, or calcines the chemically combined water and carbon dioxide from the raw materials and this forms clinker compounds (tricalcium silicates, dicalcium silicates, tricalcium aluminates and tetracalcium aluminoferrite). For each ton of raw material that enters the kiln, approximately, two thirds of a ton comes out of the discharge end as clinker.

Clinker is a grayish-black pellet, often the size of marbles and is discharged red-hot from the lower end of the kiln. The clinker is then passed through the cooler to lower its handling temperatures. After that it undergoes a considerable cooling process. It is then mixed with approximately 5-6 % of gypsum. The gypsum composition regulates the setting time of cement. The proportioned clinker and gypsum passes through the cement grinding mill and the resulting product is --- cement.

Our cement product is packed into 50-kg bags and is then offered for sale. Cement is also available for sale via our computerized bulk-discharge facilities.