Comprehensive Utilization of Red Mud Alumina

With the gradual deepening of the reform of China's electrolytic aluminum supply side and the significant increase of foreign alumina production capacity in the future, it is expected that the era of high profits in the alumina industry will be achieved without the decline in aluminum demand brought about by emerging countries to replace China’s alumina. advent. The economy is slowing down.

With the alumina production process unchanged for decades, only the comprehensive utilization of red mud (known as a worldwide problem) is expected to become the next profitable banner.

1. Introduction to Red Mud

Each ton of alumina produces about 1.5 tons of red mud, with a particle size of 0.088-0.25 mm, a specific gravity of 2.7-2.9, a bulk density of 0.8-1.0, and a melting point of 1200-1250°C. The composition of red mud is shown in the table below:

Currently, most of the alumina produced in China uses the Bayer process. The Bayer process is characterized by high iron, aluminum and alkali content.

2. Typical case of comprehensive utilization of red mud in alumina enterprises

Chinalco Shandong Branch: The data that can be found is that as of 2016, the comprehensive utilization rate of red mud was 25%, and the cumulative consumption of 12 million red mud is the high utilization rate of Chinese alumina companies. The "Henan Aluminum Industry Transformation and Development Action Plan (2018-2020)" clearly stated that the comprehensive utilization rate of red mud will reach 10% by 2021. If there is no comparison, there will be no harm. The comprehensive utilization rate of red mud in China is indeed too low. The use of aluminum red mud in mountainous areas mainly includes the preparation of new coal-fired desulfurization technology, advanced cement, highway roadbed, brick making and water purifier.

Weiqiao Group: In 2018, 20,000 tons of red mud were used in the subgrade of the 5.3 km Binzhou section of the Jiqing Expressway. According to estimates, expressways can consume 200,000 tons of red mud per kilometer, provincial expressways can consume 60,000 tons of red mud, and municipal roads can consume 20,000 tons of red mud. For countries with huge highway mileage in China, the future market prospects are broad.

3. Typical cases of social forces in the comprehensive utilization of red mud

On December 31, 2018, Shandong Satellite TV broadcast the news that Zibo Tianzhirun Ecological Technology Co., Ltd. uses a large amount of red mud to produce permeable bricks (which consumes 70,000 tons of red mud each year). The company's red mud permeable brick project has a red mud blending rate of 90%, and was successfully selected as one of the top ten innovations of the circular economy in Shandong Province in 2018. The only two houses have also been nailed to the book, but knowing that this is a worldwide problem, this is a success.

This not only caused companies in Inner Mongolia to spend hundreds of billions of dollars to break through the fact that alumina production in fly ash, but also did not make any breakthroughs.

4. Suggestions for comprehensive utilization of red mud

At present, red mud is used more in cement production, roadbed and permeable brick production. Each has its own advantages and disadvantages. The production of cement technology has matured, but there is a cement factory nearby, which consumes a lot of roadbeds. However, for economically developed areas, future demand is limited, and the production of permeable bricks can be promoted nationwide. The disadvantage is that the sales radius is more economical within 800 kilometers.

In general, the comprehensive utilization rate of alumina red mud in China is very low. Although our utilization rate is not worse than that of foreign countries, we will not be able to compare with foreign countries in the future. The era of self-transcendence in China's alumina industry has arrived, and we have grasped the comprehensive utilization of red mud. The profit margin will reshape the company's position in the alumina industry.

Spherical alumina Al2O3 powder overview

Alumina is an inorganic substance with the chemical formula Al2O3.It is a high-hardness compound and is also called bauxite in mining,ceramics and materials science.It is a white solid insoluble in water,odorless,tasteless,and very hard in nature.It is easy to absorb moisture but does not deliquescence (non-hygroscopic after burning).Alumina is a typical amphoteric oxide (corundum is alpha-shaped and belongs to the most densely packed hexagonal compound.It is an inert compound,slightly soluble in acid and alkali and corrosion resistant.[1] It is soluble in inorganic acids and alkaline solutions,but almost insoluble in water And non-polar organic solvents;relative density (d204) 4.0;melting point 2050°C,boiling point 2980°C,ionized ionic crystals at high temperature,often used to make refractory materials.

Industrial alumina is prepared from bauxite (Al2O3·3H2O) and diaspore.For Al2O3 with high purity requirements,it is generally prepared by chemical methods.There are many different crystals of Al2O3.There are more than 10 kinds of known crystals.There are mainly 3 crystal types,namely α-Al2O3,β-Al2O3,and γ-Al2O3.Among them,the structure is different and the properties are different,and it is almost completely transformed into α-Al2O3 at a high temperature above 1300℃.

Spherical alumina Al2O3 powder features:high packing density:with larger particle size and wide particle size distribution,it can realize high-density packing of rubber and plastic,and produce compounds with low viscosity and good fluidity;high thermal conductivity:Compared with crystalline silica,the high packing density can make the thermal conductivity and heat dissipation rate of the compound higher;

Low abrasiveness:Due to its spherical shape,the kneader,molding machine and mold wear less.

Alumina is used to produce brown corundum by fusing high-quality bauxite ore,while high-quality aluminate is used to produce powder corundum and white corundum.Their natural crystal structure makes them hard and fast.At the same time,they are often used as raw materials for bonded abrasive tools and coated abrasive tools.Alumina can be recycled many times,and the number of cycles is related to the grade of material and the specific process.Most standard abrasive blasting equipment can be used.

Spherical alumina Al2O3 powder should be stored in a dry,cool and sealed environment,and should not be exposed to the air.In addition,avoid heavy pressure and transport it as ordinary goods.Packed in a double-layer plastic bag inside,it can be filled with argon in a vacuum;it can be vacuumed and filled with argon for protection.Vacuum packaging,100G,500G or 1KG/bag,25kg/drum,or as your requirement.

Spherical alumina Al2O3 powder application

1.Paint:porcelain paint,wear-resistant paint and plasma spraying.

2.Ceramics:transparent ceramics,bio-ceramics and alumina ceramics.

3.Petrochemical products:high-efficiency catalysts,catalyst carriers and automotive exhaust gas purification materials.

4.Polishing materials:sub-micron/nano-level abrasive materials,single crystal silicon wafer polishing,precision polishing materials.

5.Illumination:Long afterglow phosphor raw materials and rare earth three-color phosphor raw materialshigh-pressure sodium lamp tubes, LED lights,etc.

6.Electronic products:integrated circuit substrates,single crystal materials and far infrared materials.

7.Cosmetics: cosmetic fillers.

8.Inorganic membrane materials.

Alumina is suitable for a variety of wet and dry treatment processes.It can grind the rough surface of any workpiece finely.It is one of the most economical abrasives.This kind of sharp and water chestnut synthetic abrasive has hardness second only to diamond,and is especially suitable for use when there are strict requirements for iron pollution.Used for the roughest cutting,it can also be made into a pebble shape to process precision-sized workpieces to achieve extremely low roughness.Due to its high density,sharpness,and rhombohedral structure,it is one of the fastest cutting abrasives.

Spherical alumina Al2O3 powder price

The price of spherical alumina Al2O3 powder will vary randomly with production cost, transportation cost, international situation, exchange rate and market supply and demand of spherical alumina Al2O3 powder. Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for spherical alumina Al2O3 powder, please feel free to send an inquiry to get the latest price of spherical alumina Al2O3 powder.

Suppliers of spherical alumina Al2O3 powder

As a global supplier of spherical alumina Al2O3 powder,Tanki New Materials Co.,Ltd has extensive experience in the performance,application and cost-effective manufacturing of advanced and engineered materials.The company has successfully developed a series of powder materials (including carbonization Boron,aluminum carbide,titanium carbide,etc.),high-purity targets,functional ceramics and structural devices,and provide OEM services.