51results about "Cinker content reduction" patented technology

The invention discloses a red mud preparing sulpho-aluminate cement, which is characterized by the following: using 26%-41% red mud to take place of part of aluminium and calcium raw material and whole silica and irony raw material of regular sulpho-aluminate cement production; grinding for certain fineness; desining the C4A3S,C2S,C4AF and main mineral of cement clinker; Preparing sulpho-aluminate cement by alumina, lime carbonate, calcium sulfate and other burdens. The sulpho-aluminate cement has quick induration speed and high early strength.

The invention discloses a production method of nickel slag composite portland cement. The production method comprises the following steps of: preparing cement clinker ingredients in proportion, and roasting the prepared cement clinker ingredients into cement clinker, wherein the cement clinker ingredients include 83-87wt% of limestone, 7-9wt% of coal ash and 8-12wt% of nickel slag; and respectively grinding the cement clinker, plaster and nickel slag, and mixing in proportion to form a cement product, wherein the cement product comprises 70-75wt% of cement clinker, 2.5-3.5wt% of plaster and 22-25wt% of nickel slag powder. According to the technical scheme, the production method has a positive effect of reducing the lowest liquid phase eutectic point and liquid phase viscosity of clinker, and is capable of improving burnability of raw materials, thereby being very beneficial to formation of clinker mineral.

The invention relates to a cement clinker production method by utilization of artificial slabstone waste. The artificial slabstone waste is used as raw materials, cement is fired through a drying method preheater, the artificial slabstone waste can be thoroughly processed, part of natural raw materials can be replaced, and energy-saving and emission-reducing purposes are achieved. The method includes the following steps: mixing artificial stone calcium aluminum plate waste, artificial quartz stone waste and steel slag according to a mixing ratio, drying, grinding, screening, and evenly mixing the mixed materials to obtain cement raw materials, and calcining the cement raw materials to obtain cement clinker by adopting a calcining process of an existing novel drying method kiln which is provided with a precalcining kiln. Cooled cement clinker is grinded through a mill, and the cement clinker meeting production requirements is obtained.

The invention discloses a method for preparing ordinary portland cement by taking gold mine tailings as raw materials. Cement clinker, gypsum, gold mine tailings and an activating agent are used as the raw materials, and the weight ratio of the cement clinker to the gypsum to the gold mine tailings to the activating agent is (60-95): (1-10): (5-40): (1-10). The concrete preparation method comprises the following steps of: firstly, uniformly mixing the gold mine tailings and the activating agent according to the proportion, then grinding to be fine; proportioning the cement clinker and the gypsum according to the proportion, then, uniformly mixing and grinding to be fine; and uniformly mixing the four raw materials which are ground to be fine to prepare the portland cement. In the method, the gold mine tailings with stable performance and low cost are used as mixed materials of the ordinary portland cement, the activity of the ordinary portland cement is improved by introducing the activating agent or an exciting agent, and the prepared portland cement is compact in structure and excellent in performance. The raw materials selected in the whole preparation process are simple, the characteristics of the gold mine tailings are sufficiently utilized, and portland cement with excellent performance can be synthesized.

The invention discloses a fly ash aluminum extraction residue cement, which is prepared from raw materials in the following weight proportions: 10-50 parts of fly ash aluminum extraction residue; 90-50 parts of clinker; and 1-5 parts of gypsum. After the above raw materials are mixed according to the ratio, they are sent to the cement mill, and the coarse powder is selected by the powder separator and returned to the cement mill, and the fine powder is directly sent to the cement storehouse to be the fly ash aluminum extraction residue cement. The performance of the fly ash aluminum extraction residue cement of the present invention meets the requirements of the 32.5 or 42.5 label. It overcomes many shortcomings of the prior art and realizes the advantages of simple and easy-to-obtain raw materials, scientific and reasonable process, small investment in equipment, good physical and chemical properties of cement, high early strength, and relatively stable strength increase.

The invention discloses a method for producing a G-level high oil-resistant well cement clinker and a cement clinker produced by the method, and particularly relates to a method for producing the G-level high oil-resistant well cement clinker by urban sludge ingredients, and a cement clinker produced by the method. The aim of the invention is achieved by the following processes of adding municipal sludge after utilizing excellent marble, quartz stone, iron powder and clay ingredients with high calcium content, then burning in a kiln and producing the G-level high oil-resistant well cement clinker. Compared with the prior art, not only is the municipal sludge utilized, but also municipal pollution can be reduced to a certain extent; particularly, the yield of a grinding machine can be improved; the artificial labor intensity is reduced; and the production cost can be further reduced.

The invention discloses inorganic composite conglutination powder. The inorganic composite conglutination powder comprises the following materials in parts by weight: 1.5-6 parts of sodium sulphate, 6-12 parts of cement, 27.4-61.2 parts of blast furnace slag micro powder, 9-15.3 parts of industrial waste gypsum, 6.1-12.7 parts of carbide slag, 2-8 parts of salty mud, 10-25 parts of coal ashes and 0.05-5 parts of additives. The preparation method of the inorganic composite conglutination powder comprises the following steps of: drying the materials by a dryer; conveying the dried materials to a ball mill by a conveyor belt for being grinded and storing the grinded materials in a material storage bin; and preparing the materials in proportion, conveying the prepared materials by the conveyor belt for being sufficiently mixed, and storing the mixed materials to an finished product storage bin. The inorganic composite conglutination powder is inverted on the basis of saving energy and reducing emission, and reducing the cost of domestic mine underground filling material, and is an inorganic conglutination material which adopts industrial solid waste as the main material. The inorganic composite conglutination powder has the advantages of being low in cost, extensive in application, resource-saving and energy-saving.

The invention discloses cement clinker. The raw materials are prepared by the following materials by weight ratio: 37-77 percent of waste crushed stone concrete, 10-20 percent of iron ore, 10-20 percent of chromium salt slag, 1-10 percent of clay, 5-15 percent of coal and 1-4 percent of sulfuric-acid residue. The method for preparing the cement clinker comprises the following steps: 1, crushing and pre-homogenization; 2, raw material homogenization; 3, preheating and decomposition: a preheater is used for completing preheating and partial decomposition of the raw materials; 4, cement clinker sintering: after completing preheating and predecomposition in a cyclone preheater, the raw materials enter a rotary kiln for sintering of the clinker in the next procedure; and 5, cement grinding, so as to obtain the cement clinker. According to the invention, the use amount of high-quality limestone can be reduced, Cao and Mgo contained in chromium salt slag do not need thermal decomposition, and each ton of clinker can save raw materials by 10-20 percent; and due to fluxing and mineralization action of microelements, the viscosity of a liquid phase is reduced, and the mechanical strength of the cement clinker is greatly enhanced.

The invention relates to a hydraulic binder consisting essentially in a hydraulically active amorphous calcium silicate phase, having in its constitution less than 20% in weight of a crystalline material. The said hydraulically active amorphous calcium silicate phase is a continuous matrix that may contain embedded fractions of crystalline material, being the overall C/S molar ratio of this hydraulic binder comprised between 0.8 and 1.25.

The crystalline fraction of this material is essentially composed by wollastonite in both of its polymorphic structures, α and β. Furthermore, the invention relates to methods of producing the hydraulic binder by liquefying the raw materials, in a specified C/S molar ratio, followed by fast cooling to room temperature. Finally, the invention relates to a building material made by setting the binder or a mixture containing this binder with water and subsequent hardening.

The invention enables the production of a hydraulic binder with a significant reduction of CO₂ emissions, when compared to OPC clinker, by reducing the amount of limestone in the raw materials while obtaining competitive overall values of compressive strength of the hardened material.