44results about How to "Improve clinker quality" patented technology

The invention provides a method for producing high-quality G-class oil well cement with gangue as a siliceous material. The method specifically comprises the following steps that the gangue is used as the siliceous material for dosing, a raw material is obtained through grinding, preheating decomposition, high-temperature calcination and cooling are conducted, so that oil well clinker is obtained, the oil well clinker and gypsum are ground together, and then oil well cement is obtained. After the method is implemented, the raw materials except limestone are waste residues, and therefore the coal consumption of clinker calcination is greatly reduced. The grinding yield of the raw material is greatly increased, energy sources are greatly saved, emission of CO2 is reduced, energy conservation and emission reduction are achieved, and the method accords with the national energy conservation and emission reduction environmental-protection concept; by the adoption of the scheme, the waste residues, such as the gangue, coal ash and mining barren rock are consumed greatly, and environmental pollution is reduced; besides, production cost can be reduced, and economic benefits can be increased.

The invention discloses an energy-saving and environment-friendly cement clinker preparation system, which includes a raw material preparation system, a raw material homogenization system, a fed raw material conveying system, a cement and pulverized coal preparation system and a cement clinker calcination system, wherein a material outlet of a loading bucket elevator is connected with a material inlet of a raw material homogenization air conveying chute; a material outlet of an unloading chain conveyer is connected with material inlets of two unloading bucket elevators respectively; a material outlet of a raw material feeding spiral conveyer is connected with a material inlet of a preheater; a material outlet of a spiral pneumatic conveying pump is connected with a material inlet of a decomposition furnace; a material outlet of another spiral pneumatic conveying pump is connected with a material inlet of a four-passage pulverized coal combustion device; a hot air outlet of an air-beam type grate cooler is connected with an air inlet of an air-swept coal mill; one material outlet of an electric tee scraper-trough conveyer and a material outlet of a kiln tail dust collection spiral conveyer are both connected with a material inlet of a re-homogenization loading chain conveyer. The system has the advantages as follows: the yield of the clinker is increased, the energy consumption is lowered, the emission is reduced, the quality of the clinker is improved, and the quality of the cement is stable.

The present invention discloses a preparation process for raw material used for dry-process sintering production of aluminum oxide clinker. The preparation process comprises: after metering limestone in proportion, feeding the limestone to a vertical mill; after grinding and carrying out powder selecting by virtue of the vertical mill, feeding qualified limestone powder to a gas-solid separator I; and after the gas-solid separator I collects the qualified limestone powder, feeding the qualified limestone powder to a material-mixing device; after metering nepheline and albic powder in ratio, feeding the nepheline and albic powder into a ball mill; after grinding, feeding the nepheline and albic powder to a powder concentrator by virtue of wind to perform grading; after grading, feeding qualified nepheline and albic powder to a gas-solid separator II for collecting, feeding thenepheline and albic powder into the material-mixing device; and and after limestone powder materials are mixed with the nepheline and the albic powder material in the material-mixing device, taking the mixture as a raw material finished product and feeding the raw material finished product into a homogenizing silo. The present invention further discloses a raw material preparation system applying the process. According to the preparation process, grinding is performed on the limestone and the nepheline separately by use of different grinding systems and equipment, and qualified products are acquired after being mixed and homogenized, so that product particles are distributed reasonably, and the raw material grinding system is low in power consumption.

The invention discloses a production method for co-producing cement and sulfuric acid by using gypsum. The method comprises the following steps: carrying out hierarchical heating on a raw material A containing gypsum and coke in a hierarchical suspending pre-heater, heating and carrying out reducing decomposition on the heated gypsum raw material A in a reducing decomposition fixed bed with pulverized coal combustion, transmitting a reducing decomposition gas C generated after the reducing decomposition into the hierarchical suspending pre-heater, carrying out heat exchanging with the gypsum cement raw material A, purifying for sulfuric acid production; transmitting a material after the reducing decomposition into a cement clinker sintering fixed bed, carrying out heating sintering with pulverized coal combustion, so as to obtain a cement clinker B. Compared with the prior art, the production method for co-producing cement and sulfuric acid by using gypsum disclosed by the invention has the advantages that the dosages of reducing coal and sintering coal are reduced, the sulfur dioxide concentration in the reducing decomposition gas and the quality of a cement clinker are increased, the purposes of saving energy source, reducing production cost, enhancing production capacity, reducing investment and increasing economic benefit of a producer are realized, and the environment-protection problem of phosphor-gypsum stacking treatment is solved.

The present invention relates to a preparation method of calcium-magnesium clinker. Said method includes the following steps: using magnesite and limestone as raw material, soft burning at 800-100deg.C, cooling, hydration, ball-grinding and wet mixing, filtering, carbonating, drying, forming and calcining at 1600-1900deg.C so as to obtain the invented calcium-magnesium clinker.

The invention discloses oil well cement and a production method thereof and belongs to the technical field of building materials. The cement contains oil well cement clinker and gypsum, wherein the weight ratio of the oil well cement clinker to the gypsum is (94:6):(96-4); and the oil well cement clinker is made by preparing raw batch from the following raw materials in percent by weight: 75-85% of limestone, 8-18% of sandstone and 5-12% of converter slag, grinding the raw batch, dehydrating slurry, drying and crushing filter cake and sintering to obtain the clinker. The oil well cement disclosed by the invention adopts a scientific clinker formula with high saturation ratio, high iron content and low aluminium ratio, the obtained cement has high strength, appropriate thickness and good mobility, can be used for effectively controlling the thickening time and free liquid and is applicable to oil well construction.

The invention discloses an air-locking discharging device which mainly solves the problems of air leakage, material blockage and the like in an existing discharging device. The air-locking discharging device comprises a main body, a first discharging roller, a second discharging roller and an adjusting screw rod. The main body is provided with a cavity used for containing materials, the first discharging roller and the second discharging roller are both located in the main body, and the two ends of the first discharging roller and the two ends of the second discharging roller penetrate out of the main body and are further supported by a supporting frame. The second unloading roller is parallel to the first unloading roller. The adjusting screw rod is connected with the supporting frame of the first discharging roller and the supporting frame of the second discharging roller, the distance between two supporting pieces can be adjusted by rotating the adjusting screw rod, and therefore the gap between the first discharging roller and the second discharging roller is adjusted so as to be adapted to the materials with different particle sizes and viscosities. According to the air-locking discharging device provided by the invention, the problem of air leakage is reduced. And continuous and automatic feeding of materials can be achieved, the labor cost is reduced, and the safety and stability of equipment are improved.

The invention discloses a multi-channel rotary kiln burner with directional oxygen-enriched combustion, comprising a multi-channel burner body. The outer side of the outer axial flow air sleeve of the multi-channel burner body is welded with an externally-mounted rich air casing through two surrounding plates. Oxygen channel casing, an arc-shaped diversion component is provided on the side of the external oxygen-enriched channel casing close to the outer axial flow wind casing, and an external oxygen-enriched oxygen-enriched casing is formed between the arc-shaped diversion component and the outer axial flow wind casing. The air channel, the arc of the external oxygen-enriched air channel is 10-180°, and is arranged at the lower part of the outer axial flow wind sleeve of the multi-channel burner body, and the multi-channel burner body and the oxygen-enriched air channel are concentric set up. The invention can form an arc-shaped, flat, uniform oxygen-enriched flow with a suitable angle and a suitable range at the bottom of the lower abdomen of the flame formed by the burner, and inject it into the designated area in a directional and precise manner, so as to realize the directional oxygen-enriched air to support combustion and achieve better combustion efficiency. combustion effect.