Best selling 92% Al2O3 Stable Quality Inert Alumina balls As The Supporting Material
99% Al2O3 Refractory ceramic ball can be divided into ordinary ceramic ball and high alumina ceramic ball. The high alumina one fit for hot air furnace, heating & converting furnace, air separation equipment, melting furnace and other devices in used and steel industries
Our 99 High heat storage ceramic ball is in chemical composition 99+% Alumina Oxide and a maximum 0.2wt% SiO2. Because of its high alumina oxide content and low silica (SiO2 ), it's a very excellent and ideal product for high temperature and steam applications.
99 High Alumina ceramic ball has very excellent thermal properties, with its high density high-temperature resistance 1700, also it's a good choice for heat retention or equilibration media.
We mainly produce 90%, 95% and 99% alumina ceramic balls which are mainly used in thermalcouple temperature, liquid steel continuous temperature, various industrial furnace(containing vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.
1. The main component is alumina (more than 92%), which can be used as the grinding material.
2. As the major products (more than 3.60g/cm3), it can greatly improve the grinding efficiency, reduce the grinding time, save energy, reduce costs; and increase the effective volume of the mill, thereby finally increasing the amount of grinding materials.
3. It’s the products of high hardness, low wear (less than 0.01%), and can greatly extend the service life of the grinding body.
4.Because of the high whiteness, the product will not be affected by the color of the grinding material.
|Model ||17%-19%Ordinary Ceramic Ball |
|Color ||Light gray |
|Shape ||Ball |
|Chemical composition || ||Min. % ||Max. % ||Usual % |
|Al2O3 ||17 ||19 ||18 |
|SiO2 ||70 ||77 ||74.9 |
|Al2O3 + SiO2 ||90 ||94 ||93 |
|Fe2O3 ||/ ||1.0 ||0.9 |
|TiO2 ||/ ||0.5 ||0.46 |
|CaO ||/ ||0.5 ||0.42 |
|MgO ||/ ||0.5 ||0.38 |
|Na2O ||/ ||2 ||1.12 |
|K2O ||/ ||3.5 ||3.28 |
|Physical properties ||Leachable Iron (%) ||≤0.1 |
|Apparent Porosity by Weight (%) ||D≥10mm ||≤0.4 |
|D=6mm ||≤1.0 |
|D=3mm ||≤3.0 |
|Water absorption (wt.%) ||<0.5 |
|Acid resistance (%) ||>99.8 |
|Alkaline resistance (%) ||>85 |
|Bulk Density ||(g/cm3) ||1.35 |
|(lb/ft3) ||84 |
|Specific density ||(kg/m3) ||2300 |
|(lb/ft3) ||144 |
|Moh’s hardness (scale) ||>6.5 |
|Thermal conductivity (w/m2.k) ||0.9-1.0 |
|Specific heat (J/kg.℃) ||628-837 |
|Max. Operating Temperature ||(℃) ||1050 |
|(℉) ||1922 |
|Thermal expansion (%) (500℃) ||0.20 |
Thermal Shock Stability (times)
(500 ℃ then water cooling)
|Geometric properties ||Nominal Size ||(mm) ||3 ||6 ||10 ||13 ||16 ||19 ||25 ||38 ||50 |
|(inch) ||1/8 ||1/4 ||3/8 ||1/2 ||5/8 ||3/4 ||1 ||1.5 ||2 |
|Crush Strength Min. ||(lbs) ||77 ||176 ||234 ||572 ||726 ||1672 ||1870 ||2090 ||3476 |
|(kg) ||35 ||80 ||106 ||260 ||330 ||760 ||850 ||950 ||1580 |
|(N/PC) ||343 ||784 ||1039 ||2548 ||3234 ||7448 ||8330 ||9310 ||15484 |
Inert 92% alumina ceramic balls application:
Inert alumina balls are widely used as the covering or supporting media of the catalyst in the reactors and tower packing in many fields such as petroleum, chemical industry, chemical fertilizer, natural gas and environmental protection etc. The main role is to buffer the impact of liquid and gas to the catalyst in the reactor, protect the catalyst and improve the distribution of liquid and gas in the reactor.
Packing and delivery:
Packing of Insulating brick: Standard export wooden pallet with cardboard.
Shipping of Insulating brick: By vessel or by train from any Chinese port,
Samples can be delivered by International express.
Q1 : How can you control your quality?
A1: Donghua company will conduct reburning test and chemical analysis test on the products after the completion of the products.
Q2: What is your lead time?
A2: If you are buying a finished product, Donghua guarantees to ship within one week; if it is a customized product, it will take about 15-20 days.
Q3: What is your payments terms?
A3: We can accept 30% deposit, 70% balance to be against the BL copy or by LC, or other payment terms.
Q4: Can we visit your company?
A4: We warmly welcome your arrival.
92% Al2O3 Inert Alumina Balls Alumina Grinding Ball As The Supporting Material Images