Lithium refinery exhaust gas treatment

A lithium refinery is a plant that specializes in processing and refining lithium ore to obtain high purity lithium metal or lithium compounds. The primary purpose of these refineries is to extract lithium from ore to meet the needs of a variety of applications, including but not limited to electric vehicle batteries, energy storage systems, electronics and more.

 

Lithium refineries are plants that specialize in processing and refining lithium ores to obtain high-purity lithium metal or lithium compounds.contact LITONG experts including but not limited to electric vehicle batteries, energy storage systems, electronic products, etc. With the global emphasis on clean energy and sustainable development, the demand for lithium continues to grow, which has also promoted the construction and development of lithium refineries.

The detailed steps of lithium extraction from lithium ore usually involve multiple complex process links, which are designed to efficiently extract lithium resources from lithium ore. The following is a detailed description of the steps for extracting lithium from lithium ore:

1. Lithium ore mining and beneficiation Mining, crushing and screening: The raw ore is crushed by a jaw crusher or a cone crusher, and then the crushed material is screened using equipment such as a vibrating screen to separate stones of different particle sizes.

Grinding: The screened stone is sent to a ball mill and other equipment for further grinding to obtain fine-grained materials suitable for flotation.

Ore dressing: Lithium concentrate is separated from the ground material through beneficiation methods such as gravity separation, flotation and magnetic separation.

2. Conversion and roasting of lithium concentrate Conversion roasting:

The lithium concentrate is converted and roasted at high temperature, usually between 1050 and 1150°C, so that the mineral composition of spodumene is converted from α type to β type, which is conducive to subsequent acidification roasting and leaching.

Acidification roasting: Mix the converted roasted lithium concentrate with acidic substances such as sulfuric acid, and carry out acidification roasting at high temperature to displace lithium from the ore to form soluble lithium sulfate.

3. Leaching and purification Leaching:

Leach the clinker after acidification roasting in water to dissolve lithium in the solution to form a lithium-containing leachate.

Purification: Purify the leachate to remove impurities such as iron, aluminum, calcium, and magnesium to obtain a pure lithium sulfate solution.

4. Lithium precipitation and extraction Precipitation: Add a precipitant such as soda ash to the purified lithium sulfate solution to precipitate lithium in the form of lithium carbonate.

Extraction: The precipitated lithium carbonate is subjected to centrifugal dehydration, drying, and other treatments to finally obtain a lithium carbonate product.   The main components of waste gas produced by lithium refineries calcination include the following:

Hydrogen sulfide (H2S): Hydrogen sulfide produced during the refining process is a toxic gas that is harmful to humans and the environment.

Carbon monoxide (CO): Carbon monoxide is produced when refineries burn fuel. It is a colorless, odorless, and toxic gas that can cause suffocation and death if inhaled too much.

Nitrogen oxides (NOx): Nitrogen oxides produced during the refining process are one of the main components of air pollution and have a negative impact on the atmospheric environment.

Volatile organic compounds (VOCs): Volatile organic compounds produced during the refining process are one of the main sources of air pollution, which will affect both the atmospheric environment and human health.

Particulate matter (PM): Particulate matter produced during the refining process mainly includes solid and liquid particles, which will cause harm to the atmospheric environment and human health.

Ozone (O3): Ozone produced during the refining process is a toxic gas that is harmful to humans and the environment.   Powder activated carbon is an efficient and environmentally friendly waste gas treatment material, suitable for the treatment of waste gas generated during the calcination process of oil refineries. powder activated carbon is highly adsorbent, and its surface is covered with a large number of micropores. These micropores give activated carbon a huge specific surface area, thereby enhancing its adsorption capacity. powder activated carbon can adsorb a variety of harmful gases and particulate matter, such as sulfur dioxide, nitrogen oxides, benzene series, etc., effectively reducing the pollution of waste gas to the environment. During the calcination process of the refinery, the waste gas produced has complex components and contains a variety of harmful substances. powder activated carbon can specifically adsorb harmful substances in these waste gases, reduce emission concentrations, and meet environmental protection standards. In addition, powder activated carbon also plays an important role in the purification of combustion flue gas. It effectively removes pollutants in flue gas through adsorption and improves flue gas quality. Volatile organic compounds (VOCs) are one of the common pollutants in waste gas, which have a great impact on human health and the environment. powder activated carbon is widely used in the treatment of VOCs due to its strong adsorption performance, which can effectively reduce the emission of VOCs.

In the pursuit of sustainable development, the treatment of waste gas from refineries is a complex and arduous task. However, the emergence of activated carbon purification technology has undoubtedly provided strong support for the solution of this problem. With its high efficiency, environmental protection and economic characteristics, it is gradually changing the face of waste gas treatment in refineries. We believe that with the continuous innovation of science and technology and the strong promotion of policies, future refineries will be greener, low-carbon and sustainable, contributing more clean energy to our home planet while protecting our common blue sky. Activated carbon purification technology is an indispensable part of this green revolution. Let us work together to create a better future.