Raw Materials for Refractory:Hot Sale Fire Clay Brick with Calcined Bauxite of CNBM in China
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 11 m.t
- Supply Capability:
- 11111111 m.t/month
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1.Structure of Calcined Bauxite Description
Bauxite (aluminous soil; Bauxite) is also called the alumina or bauxite, main ingredients are alumina, hydrated alumina containing impurities, is an earthy mineral. White or gray, brown and yellow or light red by iron. From 4 to 3.9 g/cm3 density, hardness, 1 ~ 3 is not transparent, very brittle. Very difficult to melt. Insoluble in water, soluble in sulfuric acid, sodium hydroxide solution. Mainly used for aluminium, refractory material.
2.Main Features of the Calcined Bauxite
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 there.By 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.
3.Main usage of the Calcined Bauxite
(1) aluminium industry. Used in national defense, aerospace, automotive, electronics, chemical industry, daily necessities, etc.
(2) precision casting. Alumina clinker made after the mould precision casting processed into fine powder. Used in military industry, aerospace, communications, instrumentation, machinery and medical equipment department.
(3) is used for refractory products. High bauxite clinker refractoriness is as high as 1780, chemical stability strong, and good physical properties.
(4) aluminum silicate refractory fiber. With light weight, high temperature resistance, good thermal stability, low thermal conductivity, heat capacity is small and the advantages of resistance to mechanical shock. Used in iron and steel, nonferrous metallurgy, electronics, petroleum, chemical, aerospace, atomic energy, defense and other industries.
(5) in magnesia and bauxite clinker as raw materials, add the appropriate binder, used for pouring ladle whole ladle lining has particularly good effects.
(6) manufacture alumina cement, abrasive materials, ceramic industry and chemical industry can be aluminum of various compound.
4. Calcined Bauxite Images
5. Calcined Bauxite Specification
The physical and chemical indicators
Item | RN-42 | RN-40 | RN-36 |
AL2O3 /% | ≥42 | ≥40 | ≥36 |
| Refractoriness/ °C | ≥1750 | ≥1730 | ≥1690 |
Apparent porosity/ % | ≤24 | ≤24 | ≤26 |
Cold crushing strength/ Mpa | ≥29.4 | ≥24.5 | ≥19.6 |
Refractoriness under load/ °C | ≥1400 | ≥1350 | ≥1300 |
Reheating Linear Change/% | 0~ -0.4 (1450°C,2h) | 0~ -0.3 (1350°C,2h) | 0~ -0.5 (1350°C,2h) |
Thermal shock resistance/cycle | This test must be conducted.The data of the test shall be included in the quality certificate. | ||
Common sizes
Straight type | Arch type | Wedge type |
L×W×H (mm) 230×114×65 230×114×75 230×114×32 220×110×60 220×110×50 220×110×40 220×110×30 | L×W×H/h (mm) 230×114×65/55 230×114×65/45 230×114×65/59 220×110×65/50 220×110×75/65 220×110×60/40 | L×W×H/h (mm) 230×114×65/55 230×114×65/45 220×110×75/65 220×110×60/40 |
Other sizes according to customer requirements | ||
6.FAQ of Calcined Bauxite
1). Q: Are you a factory or trading company?
A: We are a factory.
2). Q: Where is your factory located? How can I visit there?
A: Our factory is located in ShanXi, HeNan, China. You are warmly welcomed to visit us!
3). Q: How can I get some samples?
A: Please connect me for samples
4). Q: Can the price be cheaper?
A: Of course, you will be offered a good discount for big amount.
- Q:What are the requirements of the performances of brasque refractory?
- Physical properties of refractories include structural property, thermal property, mechanical property, usability and operation property. Structural properties of refractories include porosity, bulk density, water absorption, air permeability, pore size distribution,etc.. Refractory thermal properties include thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, thermal diffusivity, thermal emissivity. Mechanical properties of refractories include compression strength, tensile strength, breaking strength, torsional strength, shear strength, impact strength, abrasion resistance, creep property, bonding strength, elasticity modulus. usabilities of refractories include refractoriness, refractoriness under load, reheating linear change, thermal shock resistance, slag resistance, acid resistance, alkali resistance, water resistance, corrosion resistance to CO, conductivity, oxidation resistance, etc.. Operation properties of refractory include consistence, slump, fluidity, plasticity, cohesiveness, resilience, coagulability and hardenability,etc. I hope you can solve the problem with my answer.
- Q:How to choose construction external wall thermal insulation and fireproofing materials?
- The width of fireproof partition shuld be greater than 30CM, and the thickness should be the same as total thickness of thermal insulation materials. Fire barrier zone thermal insulation board and base wall should be stuck in whole area. Fire Barrier zone thermal insulation board should be stuck with the assistance of anchor bolt which must press the mesh of the bottom layer. Fire Barrier zone should be set above the door and window, with a distance of less than 50cm between the lower edge of fire barrier zone and the upper edge of window.
- Q:What kinds of refractory materials that can resist 3,000 Celsius degree?
- steel fiber reinforced spalling resistant bricks, phosphate bonded high alumina brick with high strength and wear-resistance, and high R.U.L bricks and composite bricks
- Q:How is the development of Xinmi refractories industry? What's its advantages and disadvantages?
- The advantages are largest scale, top production amout in the country, accounting for one-third of the national market, having technology, strength and the market. The disadvantages are the lack of mineral resources, serious environmental pollution,
- Q:What are the characteristics of thealuminium oxide refractory?
- Physical properties of refractories include structural properties, thermal properties, mechanical properties, performance and job performance. The structural properties of refractories include porosity, bulk density, water absorption, air permeability and pore size distribution. The thermal properties of refractories include thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, thermal diffusivity and thermal emission rate, ect. Mechanical properties of refractories include compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, abrasion resistance, creep resistance, adhesive strength and modulus of elasticity, ect.
- Q:Is the linear change on reheating the same as heating permanent linear change of refractory material?
- “+”represents expansion. the afterexpansion and aftercontraction after cooled to be at room temperature. The change may significantly damage the masonry of thermal kiln. There are regulations on the linear change on reheating of common refractory material in the national standard. Some physical chemical changes may continue. It is defined as the change from being heated to the specified temperature of refractory material sample. Heat preserving for a while till afte cooling to be at room temperature, then the residual will expand or contract in its length, heat preservation for a while, organization vitrification, the irreversible changes of its length refers to heating the firing refractory to be at high temperature, so as to make the volume of refractory materials expand or contract, due to the influence of uneven temperature or lack of time, otherwise it will cause the deformation of the refractory ball and make this indicator within standard even reach smaller value, so firing control must be strengthened in product production. But it is should not be too high. For refractory materials with same chemical composition, the linear change on reheating is produced in the heating process. Properly increasing sintering temperature and prolonging the holding time is an effective process measures, make its firing inadequate. When subjected to high temperature, it can reduce the thermal shock resistance. Minus sign "-" represents contraction. The permanent line rate refers to heating the fire refractory ball to the specified temperature. Linear change on reheating, also known as residual linear change, is an important indicator to assess the quality of refractory in the long time use. To control the permanent line rate within the standard or reach the minimum value.
- Q:What's the B grade fireproofing material?
- Grade B: rubber and plastic, extrusion molding, polyphenyl, PEF. organics, extruded sheet, polyphenyl board, phenolic resin. Hairong modules (thermal insulating and fireproof material) can reach grade B1 in fireproof performance.
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Raw Materials for Refractory:Hot Sale Fire Clay Brick with Calcined Bauxite of CNBM in China
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 11 m.t
- Supply Capability:
- 11111111 m.t/month
OKorder Service Pledge
OKorder Financial Service
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