30results about How to "Reasonable particle gradation" patented technology

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.

A high-strength alkali-resistant castable prepared from coal gangue and a method thereof belong to the technical field of refractory castables. It is composed of coal gangue, silicon micropowder, coke gemstone micropowder, calcium aluminate cement, and admixtures. The particle size and mass percentage of each raw material are: coal gangue: 10% to 20% of particle size 5mm ~ 8mm, coal gangue: particle size 3mm ~ less than 5mm 10-25% of coal gangue: 20-30% of particle size 1mm-less than 3mm, coal gangue: 10-40% of particle size less than 1mm, burnt gem: 0-10% of particle size 5μm, silicon powder: 2-10% , Calcium aluminate cement: 5-15%, admixture: 0.1-0.4%. The invention has the advantages of fully utilizing the waste coal gangue resources, and the high SiO2 content in the coal gangue can prepare high-strength alkali-resistant castables with excellent alkali resistance and low price. This kind of castable can be widely used in the preheater and grate cooler of the new dry process cement rotary kiln system, where the alkali erosion is relatively serious and the thermal engineering is similar.

The invention discloses a compression-resistant and heat-preserving concrete. The raw materials include: cement, fine aggregate, coarse aggregate, and auxiliary materials; the cement includes aluminate cement and white cinder The cinder compound has a weight ratio of 200‑400:35‑65. The invention improves the thermal insulation performance of concrete, solves the problem of poor concrete thermal insulation that has been plagued for many years, and enhances the toughness and compressive strength of concrete, effectively enhances the mechanical properties of concrete, and makes the concrete quality stable and durable. And reduce the manufacturing cost of commercial concrete, improve the quality of commercial concrete, and further expand the overall competitive advantage.

The invention discloses an application method of a support mortar coagulant prepared from coal gangue. The preparation method of the coal gangue coagulant is as follows: firstly, the coal gangue is crushed and then dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then, according to parts by weight, add 20-30 parts of coal gangue powder, 150-160 parts of water, 240-300 parts of grinding body, and 0.01-0.05 parts of surface passivator into the wet grinding equipment for grinding for 40-60 minutes to obtain a particle size below 0.3 μm gangue slurry. The application of the coagulant in the support mortar: 25-45 parts of ordinary Portland cement, 7-20 parts of water, 2-10 parts of coal gangue coagulant, 40-60 parts of quartz sand, 0.1-20 parts of high-efficiency water reducer 0.25 parts, expansion agent 3-5.5 parts, defoamer 0.03-0.2 parts, composite fiber 0.05-0.3 parts. The early strength of the prepared support mortar can reach 22.9-24.8MPa in 2 hours, and the later strength can reach more than 70MPa without shrinkage, and the fluidity is increased by 40-60%.

The invention discloses a cement grinding aid as well as a preparation method and an application method thereof. The cement grinding aid comprises the following raw materials in parts by weight: 5-15 parts of triethanolamine, 5-20 parts of honey, 1-5 parts of sodium gluconate, 1-5 parts of N-sulfo-glucosamine potassium salt, 5-10 parts of C1-C3 alcohol and 40-100 parts of water. The invention aims to provide the cement grinding aid that the grain composition of cement added with the cement grinding aid is reasonable after powdering, the fineness of cement is appropriately reduced, the strength of grinded cement can be improved, and the comprehensive effect is relatively good.

The invention relates to a solid material grinding method and a grinding machine. Solid materials enter a grinding body of a grinding room after being subjected to primary air classification, and are thrown onto a lining plate along the radial direction to be broken due to collision under the centrifugal effect of the grinding body in high-speed rotation; after rebounding from the lining plate, the broken materials oppositely collide newly-added materials to be broken; large-particle materials drop under the gravity effect and upwards enter a working cabin through a guide pipe after being subjected to high-speed hammering; the working bin has the functions of feeding and wind mixing elutriation; the materials subjected to wind mixing elutriation enter a classifier to be classified; finished material products achieving the granularity requirements are collected by a spiral collector and a bag-type dust remover and then are discharged from a finished product discharging device; and materials not achieving the granularity requirements are returned to the grinding room to be reground. The grinding machine has the beneficial effects that the grinding granularity is small, the grinding efficiency is high, the fine powder collecting effect is good, the equipment is compact in structure, the maintenance cost is low, powder bodies with the granularity in a range of 80-1,500 meshes can be produced, and the grinding machine has the advantages of high yield ad stable quality particularly when producing ultrafine powder with the granularity being greater than 800 meshes and materials with higher rigidity.

The invention relates to a preparation method for a pellet rotary kiln lining without ring formation, belonging to the field of refractory materials. The preparation method is characterized by comprising the following steps: weighing of raw materials, mixing, water addition and stirring, pouring molding, and low-temperature firing until shaping is completed. The preparation method provided by theinvention fully utilizes titanium-iron alloy industrial by-products as raw materials, solves the problem of treatment of industrial solid wastes, realizes waste reutilization, and prepares a high-performance rotary kiln lining at the same time. The rotary kiln lining prepared by using the preparation method provided by the invention has the characteristics of good wear resistance and no ring formation, so the trouble of clearing rings in the process of application is solved, and production efficiency is improved.