First, the addition of magnesia powder in the mixing process can play a stable role, prevent scorching in processing, and improve the scorching of rubber in the storage process, and also play a role in plasticizing rubber.

The addition of magnesium oxide at the beginning of rubber mixing can prevent the early crosslinking and cyclization of chloroprene and increase the safety of operation. When vulcanizing, it becomes a vulcanizing agent, which acts as a hydrogen chloride acceptor to prevent the hydrogen chloride from corroding the fibrous tissue. Magnesium Oxide can improve heat resistance and aging resistance. The quality of Magnesium Oxide has great influence on the processing and vulcanization of chloroprene rubber. When the dosage of Magnesium Oxide is increased to 10 parts, it can make the colloid have higher plasticity and better storage stability.

Zinc Oxide is mainly vulcanized, which makes vulcanization flat. Increasing the amount of zinc oxide can improve the heat resistance and aging resistance, but the compound is easy to scorch and reduce the storage stability of the compound. It can also harden the rubber and lose its plasticity. However, the curing speed can be increased, and the degree of vulcanization and high temperature resistance can be improved. Generally, the use of magnesium oxide and zinc oxide at the same time solves the scorchable scorching of vulcanizates, the high degree of vulcanization and the high speed of vulcanization, and the degree of shear crosslinking is much higher than that of single use.

The desulfurization principle of magnesium oxide wet desulfurization tower is basically the same as that of calcium oxide wet desulfurization process. The flue gas enters the reactor radially from the lower part of the desulfurization reaction tower, contacts with magnesium hydroxide slurry in the process of rising in the reactor, and reacts with sulfur dioxide in the flue gas to form magnesium sulfite to achieve the desulfurization effect. Magnesium sulfite belongs to insoluble substance, which is partly converted into magnesium sulfate under the action of oxidation fan.

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Meanwhile, harmful gases such as SO3, HCl and HF contained in the flue gas are absorbed into the absorption tower and dissolved into the slurry. With the consumption of magnesium hydroxide in the desulfurization tower, the pH value will decrease. Fresh slurry should be continuously added to the desulfurization tower, and the products of desulfurization reaction need to be discharged regularly. Because the main components of magnesium oxide wet desulfurization products are magnesium sulfite and magnesium sulfate, unlike calcium sulfate desulfurized by calcium method, calcium sulfate with low solubility can produce gypsum with high purity by using vacuum belt conveyor after swirling flow, and gypsum market is wide. However, for magnesium oxide wet desulfurization products are magnesium sulfite and magnesium sulfate, the solubility of magnesium sulfate is high, and the content of magnesium sulfite varies greatly with the operating conditions of the oxidation fan. It is impossible to extract magnesium sulfate or magnesium sulfite with high purity, and the market prospects are worrying because the purity of the extracted products can not meet the requirements. So there is no vacuum belt conveyor in the slurry disposal system of two desulfurization towers in the company to extract the products for comprehensive utilization. The slurry of desulfurization towers is directly put into the desulfurization wastewater disposal system. The disadvantageous factors such as high solid content, high temperature (53 C), low pH and large amount of wastewater from the slurry are the disadvantages of desulfurization wastewater. The technology has brought great difficulties.