Agriculture

Kieserite is a highly effective fertiliser that supplies crops with readily available magnesium and sulphur, two essential nutrients for plant vitality. Magnesium is central to chlorophyll production and photosynthesis, while sulfur is key in amino acid and vitamin synthesis. Together, they promote healthy growth, stress resilience, and higher yields.

Deficiencies of magnesium and sulphur can be seen in yellowing between leaf veins, leaf tip necrosis, and stunted growth. Crops such as maize, soybeans, and tobacco show reduced photosynthetic efficiency and poor fruit development when deficient. Kieserite corrects these issues quickly thanks to its high solubility, making it ideal for both soil and foliar application.

In oil palm cultivation, field studies in Malaysia and Papua New Guinea show that annual kieserite applications of 2–4 kg per tree can raise foliar magnesium levels from deficient (~0.20%) to optimal (~0.26%), increasing fruit bunch yields by up to 15%. Kieserite also activates stress-reducing enzymes, enhancing resilience in tropical climates.

Kieserite is recommended for crops such as banana, citrus, sugarcane, tea, potato, cotton, rice, and more. It performs particularly well in acidic, leaching-prone soils like those in southern China. As a base fertiliser, topdressing, or foliar spray, it supports high-value horticulture and precision agriculture. With proven yield improvements of 10–30%, Kieserite remains a vital input for sustainable and productive farming systems.

Feed

High-concentration MgO is a vital component in livestock feed, widely recognised for its effectiveness in promoting growth performance, enhancing metabolic stability, and supporting immune function. Due to its high elemental magnesium content, low moisture sensitivity, and superior thermal and chemical stability, MgO is especially suited for use in ruminant and monogastric nutrition systems. As a slow-release, bioavailable mineral source, it contributes to nutrient homeostasis and long-term mineral sufficiency in intensive production environments.

In ruminant diets, high-purity MgO functions as a key ruminal buffer. Its alkaline properties help stabilise rumen pH, particularly under high-concentrate feeding regimes, thereby reducing the risk of subclinical acidosis. Research involving feedlot cattle has demonstrated that MgO supplementation increases ruminal pH and decreases systemic stress indicators such as plasma haptoglobin and cortisol, markers associated with improved welfare and digestive stability. Additionally, MgO contributes to bone mineralization by assisting calcium and phosphorus balance during rapid skeletal development, especially in growing and lactating animals.

In monogastric animals such as poultry and swine, the inclusion of high-concentration MgO in mineral premixes supports efficient feed conversion and immune robustness. It activates magnesium-dependent enzymes, such as superoxide dismutase and glutamine synthetase, which are crucial in reducing oxidative stress and improving nutrient absorption. A targeted feeding trial in poultry demonstrated improved feed efficiency and enhanced growth uniformity with MgO inclusion, attributed to its stable magnesium delivery and compatibility with premix formulations.

Altogether, high-purity MgO presents a scientifically validated and operationally efficient solution for addressing magnesium demands in modern livestock feeding systems. Its integration into compound feeds or premixes ensures consistent mineral supplementation, optimized animal growth trajectories, and reinforced physiological resilience—cementing its role as a cornerstone mineral additive in intensive animal agriculture.

Environmental Protection

MgO and Kieserite have emerged as essential materials in environmental engineering due to their chemical reactivity, alkaline buffering properties, and alignment with sustainable treatment strategies. These magnesium-based compounds are widely used in wastewater treatment and flue gas desulfurization to support cleaner industrial processes and contribute to global environmental compliance.

In wastewater applications, powdered MgO acts as a strong alkaline agent and source of divalent cations, facilitating the precipitation of heavy metals such as cadmium, arsenates, and chromates. Its buffering action also stabilises acidic waste streams, particularly in industrial effluents from electroplating, mining, and dyeing operations. For systems requiring slower release or lower solubility, granular MgO is used in reactive filtration or neutralisation beds, offering prolonged alkalinity control without rapid dissolution. Studies have shown that coarse MgO with optimised surface area still offer high efficiency in multi-contaminant removal while being cost-effective in large-scale operations. Kieserite, being a water-soluble source of both magnesium and sulphur, improves microbial balance in sludge, aids in odour reduction, and contributes to optimised conditions for nutrient stabilisation. In agricultural and municipal wastewater systems, it also plays a key role in enhancing sludge dewatering and supporting overall treatment efficiency.

In flue gas desulfurization, MgO is gaining preference over traditional calcium-based reagents due to its higher reactivity and lower sludge generation. When reacting with SO₂, it forms magnesium sulphite and sulphate, both stable compounds with desulfurization potential and lower post-treatment demands. This approach is particularly advantageous in waste-to-energy facilities, cement kilns, and coal-fired power plants, where SO₂ fluctuations demand a flexible and efficient reagent.

At Chinese Kieserite Company Pte. Ltd., we offer a full range of high-purity magnesium-based materials optimised for environmental performance. Whether used in effluent treatment or industrial emission control, our products help industries achieve their environmental compliance targets while supporting broader global efforts in pollution mitigation and sustainable development. Our goal is to support long-term ecological balance by providing reliable, application-ready solutions grounded in proven industrial performance.

Chemical Industry

MgO and Kieserite are essential mineral inputs in the chemical and construction industries due to their reactivity, structural versatility, and environmental compatibility. These materials contribute significantly to the development of modern construction composites, flame-retardant systems, and chemical-resistant concrete.

MgO is widely recognized for its role in refractory and metallurgical products, particularly in the fabrication of high-temperature crucibles and magnesite-based cupels used in fire assay testing. These materials ensure minimal metal loss and strong lead absorption, with confirmed resistance to thermal shock in cupellation environments. In polymer composites, MgO acts as a synergistic flame retardant filler, especially in halogen-free insulation, reducing flammability and smoke release while enhancing char stability.

In construction materials, reactive MgO is used in low-carbon cement formulations where it improves dimensional stability, carbonation resistance, and mechanical strength, while also enabling lower-temperature processing. Multiple studies confirm its potential to replace part of Portland cement in eco-concrete mixes, contributing to sustainable building materials.

Kieserite, although traditionally used in agriculture, plays a role in industrial corrosion scenarios. It has been investigated in sulphate exposure tests for concrete, where its interaction with cementitious matrices helps simulate long-term degradation patterns, leading to new sulphate-resistant cement technologies. Furthermore, its magnesium and sulphate ion content improves the vulcanisation of rubber and acts as a filler that enhances dispersion, flexibility, and strength in elastomer blends.

Together, MgO and Kieserite are increasingly valued in green infrastructure development, offering both technical performance and environmental benefits. Their incorporation into next-generation construction systems is aligned with global goals for durability, low emissions, and circular use of mineral-based materials.