The Application of Magnesium Oxide in Cobalt Precipitation

Overview Magnesium oxide is an important raw material for the preparation of high-function fine inorganic materials, electronic components, inks, and harmful gas adsorbents. In recent years, with the continuous development of China’s economy, especially the rapid development of the lithium battery industry, the demand for cobalt has also increased. The Comparison of the application of Sodium Carbonate and Magnesium Oxide in Cobalt Precipitation At present, the Democratic Republic of Congo is the world’s largest exporter of cobalt raw materials. However, in order to save costs, local companies extract cobalt using sodium carbonate. This process ultimately produces wastewater containing large amounts of sodium sulfate. Sodium sulfate wastewater is difficult to treat and direct discharge can have a very adverse impact on water quality and the environment. Now, in order to comply with environmental protection policies, local companies are also improving their processes and using magnesium oxide cobalt precipitation technology to produce cobalt hydroxide to reduce environmental pollution. The magnesium oxide cobalt precipitation process mainly consists of impurity removal and cobalt precipitation. By adding a certain proportion of acid to the low-copper cobalt extraction residue solution, a solution containing Co2+, Cu2+, Fe3+ is obtained; then CaO (quicklime) is added to remove Cu2+ and Fe3+ from the solution; then MgO is added to react with water to form Mg(OH)2, while Mg(OH)2 reacts with Co2+ to form Co(OH)2 precipitate which slowly precipitates out of the solution. Ze Hui also concluded from experiments that using magnesium oxide for cobalt precipitation can reduce the amount used by half compared to using sodium carbonate, saving some logistics and storage costs. At the same time, the magnesium sulfate wastewater produced by cobalt precipitation is easy to treat and is a more suitable and environmentally friendly way to extract cobalt. Market Demand Forecast for Magnesium Oxide Nowadays, magnesium oxide cobalt precipitation technology has matured, and most of Congo' s magnesium oxide is provided by China. By comparing the export volume of magnesium oxide with the proportion of magnesium oxide used in Congo, we can know the application amount of magnesium oxide in cobalt precipitation technology. It is estimated that the amount of magnesium oxide used for cobalt precipitation is still quite large. In addition, although we cannot see magnesium oxide directly in our daily life, its application industries are very wide. Magnesium oxide is used in chemical industry, construction industry, food industry, transportation industry, pharmaceutical industry and so on. In addition to these aspects, magnesium oxide is also used in glass, dyeing, cable, electronics industry, insulation materials industry and so on. Overall, the market demand for magnesium oxide is still quite considerable. The above is Ze Hui' s analysis of magnesium oxide in cobalt precipitation. Ze Hui Magnesium Base is one of the first domestic enterprises to research, produce and sell magnesium compounds with more than 20 years of experience in magnesium salt production. We believe that our products can make our customers satisfied.

06-29-2023

The Role of Adding Light Magnesium Oxide to Tires

With the development of society, the application range of tires is becoming wider and wider, not only including traditional transportation tools such as bicycles, cars, agricultural vehicles, but also involving emerging products such as baby strollers, toy cars, balance cars, etc. Different uses have different performance requirements for tires. And light magnesium oxide is an important additive that can improve the quality of tires. What is light magnesium oxide? Light magnesium oxide is a white loose amorphous powder, odorless, tasteless, and non-toxic. Its volume is about three times that of heavy magnesium oxide, and it is a common inorganic compound. Light magnesium oxide has a wide range of applications in industries such as tires, rubber, ceramics, building materials, metallurgy, chemical industry, food, medicine, etc.   What are the functions of light magnesium oxide in tires? Light magnesium oxide can play a variety of roles in the production process of tires, such as: - Scorch retarder: prevent the rubber from overheating and coking during processing. - Vulcanization accelerator: accelerate the vulcanization reaction and improve the vulcanization efficiency. - Acid absorber: neutralize the acidic substances in the rubber, prevent aging and corrosion. - Filler: increase the volume and density of the rubber, reduce the cost. - High temperature resistance: improve the stability and safety of tires in high temperature environments. - Fire retardant: reduce the burning speed and smoke generation of tires when encountering fire. - Corrosion resistance: resist the erosion of external factors such as moisture, salt, acid and alkali.   In addition, light magnesium oxide also has a certain activity, which is conducive to improving the comprehensive performance of tires, such as: - Extend scorch time: increase the flexibility and wear resistance of tires. - Control rubber content and adhesion performance: optimize the physical properties of rubber, balance tensile strength and dynamic compression deformation and heat generation problems, reduce quality defects. - Prevent tire burst and wheel hub detachment: improve the reliability and safety of tires when running at high speed or heavy load.   What should I pay attention to when using light magnesium oxide? Although light magnesium oxide has many benefits for tires, some details should also be paid attention to during use to avoid adverse effects, such as: - Moisture-proof treatment: Once light magnesium oxide is dampened, it will cause hydrochloric acid insoluble matter and water-soluble matter to be too high, causing blistering, sand eye and other phenomena. - Magnesium oxide content control: too low magnesium oxide content will affect the toughness and wear resistance of tires; too high will increase hardness and stiffness, reduce elasticity and ductility. - Calcium content control: too high calcium content will make tires brittle and prone to fracture. - Dosage control: too little dosage will increase crosslinking density, leading to shortened scorch time and positive vulcanization time, affecting tire tensile strength, fixed extension stress and hardness, elongation; too much dosage will reduce crosslinking density , Leading to prolonged scorch time and positive vulcanization time, affecting tire wear resistance, aging resistance and oil resistance.   Therefore, when selecting and storing light magnesium oxide, you should pay special attention to choosing the appropriate variety and specification, keeping a dry and sealed environment, adding according to the correct proportion and method, in order to achieve the best effect of light magnesium oxide in tires.

07-07-2023

The necessity of modifying magnesium hydroxide flame retardant

The principle and advantages of magnesium hydroxide flame retardant Magnesium hydroxide is an inorganic flame retardant filler, which has a broad application prospect in polymer-based composite materials. Magnesium hydroxide flame retardant decomposes and releases water when heated, absorbs heat, reduces the temperature of the flame on the surface of the polymer material, and delays the process of polymer degradation into low molecular weight. At the same time, the released water vapor can dilute the oxygen on the surface of the material, inhibiting the combustion of the material surface. Therefore, magnesium hydroxide flame retardant has the advantages of non-toxicity, low smoke, and no secondary pollution. It is an environmentally friendly flame retardant. The necessity of modifying magnesium hydroxide However, compared with halogen-based flame retardants, magnesium hydroxide flame retardants require a higher filling amount to achieve the same flame retardant effect, generally above 50%. Because magnesium hydroxide is an inorganic substance, it has poor compatibility with polymer-based materials. A high filling amount will affect the mechanical properties of composite materials. To solve this problem, it is necessary to modify the surface of magnesium hydroxide to improve its compatibility with polymer-based materials, improve its dispersibility in composite materials, increase its surface activity, thereby reducing its dosage, improving its flame retardant efficiency, and maintaining or improving the mechanical properties of composite materials. The methods of modifying magnesium hydroxide At present, there are two common methods for modifying magnesium hydroxide: dry method and wet method. The dry method modification is to mix dry magnesium hydroxide with an appropriate amount of inert solvent, spray it with a coupling agent or other surface treatment agent, and mix it in a low-speed kneading machine for modification treatment. The wet method modification is to suspend magnesium hydroxide in water or other solvents, directly add a surface treatment agent or dispersant, and modify it under stirring. The two methods have their own advantages and disadvantages and need to be selected according to specific situations. In addition to the surface modification method, the refinement method can also be used to crush magnesium hydroxide powder to the nanometer level, increase its contact area with the polymer matrix, enhance its affinity with the polymer, and thereby improve its flame retardant effect.

05-29-2023