Zhu Nannan

Bio: Zhu Nannan is an academic researcher. The author has contributed to research in topics: Calcium oxide & Grinding. The author has an hindex of 1, co-authored 1 publications receiving 18 citations.

Preparation method of special low-density grinding column for cement grinding mill

Abstract: The invention relates to a preparation method of a special low-density grinding column for a cement grinding mill. The preparation method comprises the steps of with bauxite, alumina powder and the like as main raw materials and chromium oxide, zirconium oxide, calcium oxide, magnesium oxide, ferric oxide, manganese oxide, titanium oxide, silicon dioxide and the like as modified raw materials, adding alumina sol, silica sol and metal salt into slurry at a grinding stage; molding by rolling, isostatic pressing or machine pressing to obtain a green body; and calcining after drying the green body to obtain the low-density grinding column. By virtue of scientific proportion design, strict process control and unique calcining system, the special low-density grinding column disclosed by the invention is low in cost, excellent in wear resistance, lower in power load as comparison with a high-density metal grinding body, suitable for substituting a metal grinding body in cement grinding, iron ore grinding and gold ore grinding and capable of reducing the electric consumption for grinding by 30-50%.

Preparation method of high-performance high alumina ceramic grinding ball

Abstract: The invention discloses a high-performance high alumina ceramic grinding ball and a preparation method of the grinding ball. The grinding ball comprises the following raw materials by weight percentage: 84-93% of aluminum oxide, 4-12% of silicon dioxide, 1.8-2.5% of light calcium carbonate, 0.25-0.6% of magnesium oxide and 0.03-0.05% of titanium dioxide. The preparation method comprises the stepsof mixing fine-grained aluminum oxide and the other raw materials according to the proportion, performing wet milling in a ball mill, performing spray drying with a centrifugal spray drying tower after a particle size tested by a laser particle size analyzer is acceptable, taking spray drying powder as a seed, treating other spray drying powder as powder, and performing rolling to form the ball. The used raw materials are ordinary and easy to obtain; the preparation method is simple to operate and mild in condition; the interior and the exterior of the produced ball are consistent; the ball ishigh in strength and low in abrasion; a ball breaking rate in a high-speed grinding use process is reduced; the abrasion is not aggravated with the service time; a service life of the grinding ball is greatly prolonged; and the production cost is lowered.

Aluminum oxide ceramic ball with high wear resistance and preparation method thereof

Abstract: The invention discloses an aluminum oxide ceramic ball with high wear resistance The aluminum oxide ceramic ball is prepared from, by weight, 100 parts of high bauxite, 5-12 parts of titanium carbonitride, 02-08 part of chromium powder, 5-15 parts of electro-fused zirconia powder, 1-5 parts of wollastonite, 2-10 parts of activated clay, 3-12 parts of kaolin, 05-15 parts of calcium carbonate, 02-15 parts of lithium carbonate, 01-05 part of lanthanum oxide, 01-05 part of yttrium oxide, 01-05 part of europium oxide, 02-1 part of tetraterbium heptaoxide, 03-08 part of holmium oxide and 01-05 part of copper oxide According to the aluminum oxide ceramic ball with the high wear resistance and a preparation method thereof The preparation method is simple in process and mild in condition, and the obtained aluminum oxide ceramic ball is excellent in anti-impact property and good in wear resistance and can meet the use requirements of a cement grinding system

Zirconium oxide-corundum composite ceramic body for cement grinding mill and production process of zirconium oxide-corundum composite ceramic body

Abstract: The invention discloses a zirconium oxide-corundum composite ceramic body for a cement grinding mill and a production process of the zirconium oxide-corundum composite ceramic body. The ceramic body comprises alumina micro-powder, alumina whiskers, zirconium oxide and a binding agent. The production process includes: placing the raw materials above into a ball mill for wet milling, sieving, placing into a slurry tank, stirring and aging, removing iron, feeding into a spray drying tower for spraying pulverization, and conveying into a large bin for aging; using an extrusion molding method or an injection molding to prepare the aged powder into bases, feeding the bases into a high-temperature tunnel kiln, performing temperature-gradient sintering, grinding the sintered products, water and boron nitride in a ball mill, discharging, drying and packaging. The spherical ceramic body and the production process thereof have the advantages that the ceramic body is smooth in surface, high in hardness, high in wear resistance, high in impact resistance, low in equivalent abrasion and the like, the service life of the ceramic body is prolonged, production cost is lowered, and production efficiency is increased.

Ceramic grinding body and preparation method thereof

Abstract: The invention relates to the technical field of ceramic materials, in particular to a ceramic grinding body. The ceramic grinding body is prepared from the following raw materials in parts by weight: 70-95 parts of high-aluminum bauxite, 6-20 parts of kaolin, 2-10 parts of graphite powder and 1-6 parts of a composite low-temperature fluxing agent, wherein the composite low-temperature fluxing agent is prepared from the following components by mass percent: 25-30% of elpasolite, 15-25% of fluorite, 15-25% of magnesium fluoride and 25-35% of sodium carbonate. The invention also concretely discloses a preparation method of the ceramic grinding body. The ceramic grinding body prepared by the method is low in internal porosity, less in structure defects, good in abrasion resistance, large in elasticity modulus, high in hardness, impact-resistant, good in toughness, high in grinding efficiency and low in energy consumption, thus being suitable for a dry grinding technology.

Microcrystalline wear-resistant ceramic grinding body as well as preparation method and application thereof

Abstract: The invention belongs to the technical field of ceramic materials, and in particular relates to a microcrystalline wear-resistant ceramic grinding body as well as a preparation method and applicationthereof. The microcrystalline wear-resistant ceramic grinding body is prepared from the following components: alpha-alumina, high bauxite, iron oxide, talc, barium carbonate, potassium feldspar, titanium dioxide, manganese dioxide, ground calcium carbonate, zirconium oxide, lanthanum oxide and cerium oxide. By means of microcrack toughening, zirconia transformation toughening, grain refinement andtoughening and the like, the preparation method provided by the invention more greatly improves the toughness of the microcrystalline wear-resistant ceramic grinding body; furthermore, by adding appropriate types and quantities of mineralizing agents, optimizing the technological parameters and strictly controlling the process, a more ideal mineral phase is formed, and the microstructure of the microcrystalline wear-resistant ceramic grinding body is enabled to be denser and more uniform; when the microcrystalline wear-resistant ceramic grinding body is in use, the anti-stripping capacity andimpact resistance capacity of the grinding body are greatly improved, and the comprehensive performance of the grinding body is superior to that of alumina porcelain balls of the same type.