Comprehensive Utilization of Red Mud Alumina

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 without the decline in aluminum demand brought about by emerging countries to replace China’s alumina, the era of high profits in the alumina industry will be 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

1. 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 China's red mud 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.

2. 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 the 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. Alumina is a typical amphoteric oxide (corundum is alpha-shaped and belongs to the hexagonal compound with the highest density. It is an inert compound that is slightly soluble in acid [1 ] Soluble in inorganic acids and alkaline solutions, 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, commonly used in the manufacture of refractory Material.

Industrial alumina is prepared from bauxite (Al2O3•3H2O) and gibbsite. For Al2O3, which requires high purity, it is usually prepared by chemical methods. There are many kinds of Al2O3 crystals, and there are more than ten kinds of known crystals. α-Al2O3, β-Al2O3 and γ-Al2O33 crystal types are different in structure and performance. They are almost completely transformed into α-Al2O3 at high temperatures above 1300℃.

Spherical alumina Al2O3 powder features: high bulk density: large particle size, wide particle size distribution, can achieve high-density packing of rubber and plastic, produce low viscosity, good fluidity compounds; high thermal conductivity: and crystalline silica Compared with the high packing density, the thermal conductivity and heat dissipation rate of the composite material can be higher;

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

Alumina is used to fuse high-quality bauxite to produce brown corundum, while high-quality aluminate is used to produce powdered corundum and white corundum. Their natural crystal structure makes them hard and fast. Raw materials for bonding abrasives and coated abrasives. Alumina can be recycled multiple times, and the number of cycles depends on the grade of the material and the specific process. Most standard sandblasting 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 a normal item. Packed in a double-layer plastic bag, it can be filled with argon in a vacuum, or it can be evacuated and filled with argon for protection. Vacuum packing 100G, 500G or 1KG/bag, 25kg/drum or according to your requirements.

Spherical alumina Al2O3 powder application

1. Paint: enamel 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 purification materials.

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

5. Illumination: Long afterglow phosphor raw material and rare earth tricolor phosphor raw material high pressure sodium tube, LED lamp, 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 various wet and dry processes. It can finely grind the rough surface of any workpiece. It is one of the most economical abrasives. The hardness of this sharp water chestnut synthetic abrasive is second only to diamond, and it is especially suitable for occasions with strict requirements for iron pollution. For the roughest cutting, it can also be made into a pebble shape to process precision-sized workpieces to achieve extremely low roughness. The diamond structure is one of the abrasives with the fastest cutting speed.

Price of spherical alumina Al2O3 powder

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 advanced, engineered material performance, application and cost-effective manufacturing. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.

Technical Parameter of Spherical Aluminum Oxide Al2O3 Powder：
Test Items		Unit	Typical value	Test Method
Chemical Analysis	Al2O3	%	99.7	ICP
	Na2O	ppm	240	ICP
	SiO2	ppm	184	ICP
	Fe2O3	ppm	120	ICP
Ionic  Impurities	Na+	ppm	56.3	Atomic Absorption Spectrometer
	Cl-	ppm	1.4	Auto Electric Potential Titrator
	Fe++	ppm	17.6	IC