refractory grade size 1-3mm calcined bauxite 75,80,85,86,87,88,90

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China main port
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Min Order Qty:
25 m.t.
Supply Capability:
10000 m.t./month

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Place of Origin:

Shanxi, China (Mainland)




Alumina Block

SiO2 Content (%):


Al2O3 Content (%):


MgO Content (%):


CaO Content (%):


Refractoriness (Degree):

1770°< Refractoriness< 2000°

CrO Content (%):


SiC Content (%):


Model Number:


Brand Name:



3.0 max


0.3 max


0.4 max




granula and powder

bulk density:





0.03% max


yellow,black and white granula and powder


abrasive ,cement ,chemical, metallurgical, and refractory and so on

Packaging & Delivery

Packaging Details:25kg/Bag,1Mt/Bag,1.25Mt/Bag; Or as per Client's request
Delivery Detail:7-15 days upon receipt of prepayment by TT or L/C


Calcined bauxite: 
14 years producing experience; 
self-owned mines; 
SGS or BV report.

Calcined bauxite specification:







Bulk density

















































Size: as buyer’request

Packing: usually we packing in big bag, 1.25mt/bag; we could pack as buyer’request

Calcined bauxite is one of the principal ore of aluminum. Calcined bauxite contains hydrous aluminum oxides and aluminum hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas .calcined bauxite is obtained by calcining (heating)superior grade bauxite at high temperature (from 85OC to 1600C) .this removes moisture thereby increasing the alumina content. compared to an alumina content of about 57%to 58%in raw bauxite, calcined bauxite has an alumina content of 84%to88%.the heating is carried out in rotary kilns.


calcined bauxite is typically calssified according to its intended commercial application,such as abrasive ,cement ,chemical, metallurgical, and refractory .as raw material for use in high alumina and super duty refratory bricks and shapes ,plastics ,castable refratory, motors, gun mixes, ramming mixes, abrasive grains and other products.

refractory grade size 1-3mm calcined bauxite 75,80,85,86,87,88,90

refractory grade size 1-3mm calcined bauxite 75,80,85,86,87,88,90

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Q:What are the additives and recipes of refractory?
You can try FDN.
Q:What are the disadvantages of the refractory industry?
The rapid development of continuous casting technology allows Hua Heng refractories to be improved in variety and quality. The development of refractory for continuous casting has a significant impact on the production of continuous casting and quality of continuous casting billet. Constructing and putting Baosteel into action has greatly pushed the improvement of the refractory technology. Continuous casting refractory is an important part of the continuous casting machine. In addition to the general characteristics of refractories, it is also required functions that can purify molten steel, improve the quality of steel, stabilize temperature and composition of the molten steel, control and regulate the molten steel flow. Therefore, it is known as functional refractories. Continuous casting Refractories include: (1) ladle refractory - ladle lining, permanent lining and ventilation components; (2) tundish refractories - permanent lining, coating, insulating plates, clad etc; (3 ) functional refractories - long nozzle for non-oxidizing casting, submerged nozzle, monolithic stopper, sliding gate; (4) ceramic purifier for purifying molten , slag dam, alkaline paint and horizontal separating ring and gate board for continuous casting.
Q:What is the function of red stone refractory materials
Q:What's the fire endurance of A grade fireproof glass curtain wall?
The following is fire endurance of A class fireproof glass curtain wall. Fire endurance of the fire window: A class fire window: no less than 1.2h; B class fire window: no less than 0.9h; C class fire window: no less than 0.6h. Technical requirements: 1. Materials and fittings: (1) Window frame should adopt the steel frame or wood frame with certain strength so as to guarantee the integrality and stability of the fitting; (2) Steel frame and mound layer can choose the galvanized steel sheet or stainless steel sheet. Its selection standard is in line with provisions of Article 5.1 in GB12955 "General Technical Requirements on Steel Fire Doors"; (3) Selection standard of wood frame and mound layer should be consistent with the provisions of Article 5.1.1 in GB14101 "General Technical Requirements on Wood Fire Doors"; (4) Filler material inside the steel frame and wood frame should be incombustible material; (5) Fireproof glass can choose the qualified product with no influence on the fire resistance test of the fire window, and its light transmittance should be no less than 75% of that of the ordinary sheet glass with the same layers; (6) Sealing material between the frame and the fireproof glass should use flame retardant material which can play the role of fire prevention and smoke insulation in case of fire. Hope it's helpful for you.
Q:How to divide fire resistant level of fire door?
Fire resistant level of fire door【Class A fire door】. Class A fire door is also called complete fire door. It can meet the requirement of fireproof thermal insulation and refractory integrity at the same time in specified time. Fire resistant levels are 0.5h(Grade C), 1.0h(Grade B), 1.5h(Grade A) and 2.0h, 3.0h. 【Class B fire door】Class B fire door is also called part heat insulation fireproof door. Its requirement of fireproof and thermal insulation performance is 0.5h. Refractory integrity levels are 1.0h, 1.5h, 2.0h and 3.0h respectively. 【Class C fire door】Class C fire door is also called not thermal insulation fireproof door. Ther is no requirement of its fire resistance and thermal insulation. It only meets the requirement of refractory integrity in specified refractory time. The grading of refractory integrity is 1.0h, 1.5h, 2.0h and 3.0h respectively. There is the content of not thermal insulation fire door in British BS standard.
Q:How to divide fire rating of decorating materials ?
level A: incombustible, B1: Flame retardant, Level B2: combustible, Level B3: Flammable.
Q:How many types of fire-resistant material?
1. Acid fire-resistant material refers to one with more than 93% SiO2. It is featured by resistance to the corrosion of acidic slag ad high temperature and easy to react with alkaline molten slag. 2. Alkaline refractory material generally refers to one with magnesium oxide or magnesium oxide and calcium oxide as the main component. It has high refractoriness and strong resistance to basic slag. 3. Silicate aluminum refractory material refers to one with SiO2, Al2O3 as the main component. According to the content of Al2O, it can be divided into three categories: half siliceous (15-30% Al2O3), clay (Al2O3 30 ~ 48%), high aluminum (more than 48% of Al2O3). 4. Fused cast refractory material refers to shaped refractory products made by high temperature melting and casting.
Q:Who knows the fire endurance of rock wool color plate?
I'm glad to answer your question and offer you some of my experiences, for reference only. In fire safety rules, it can be divided into non-combustible component, hard-combustible component, combustible component according to the combustible degree of building materials. Rock wool board is building board recombinated artificially by fibers processed by coated steels and inorganic minerals like basalt mineral, because steel plate and rock wool which is the main components are non-combustible material, so rock wool board should be considered as non-combustible component. The fire endurance of rock wool board has its own judging criteria. Lose sustaining power, integrity and fire insulation function. Its fire endurance is within 2 hours.
Q:What is the main constituent of refractory brick?
There are several refractory bricks, including clay brick, carborundum brick and chromium-carbon. The type you said may be refractory bricks made from bauxite.
Q:who knows the uses of refratories?
1. Category: chinalco refractory aggregate Al2O3 containing about 35% -40%, high-alumina refractory aggregate containing 55% Al2O3. Widely used in thermal equipment, high-temperature furnace wall, heatable brick bed, chimneys, lining and other basic construction, it is mainly used in military, warehouse, air defense, industrial and mining enterprises, and general industrial furnace, the finest raw materials in cement admixture and expanding agent plant. Having a low density, thermal conductivity, water absorption, fire-resistant thermal insulation properties. Lightweight mullite refractory aggregate: This project uses natural materials to synthesize advanced refractory raw materials. It is a new synthetic materials. lightweight refractory aggregate to make lightweight refractory castables at high temperature has been in short supply. In most cases it is replaced by used light weight brick pieces. the entailing problem is : high-temperature lightweight castable refractory shrinks at high temperatures, affecting the performance of high-temperature lightweight castable refractory. high alumina refractory aggregate is often used.

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