The energy consumption in the production process of ammonium metatungstate mainly depends on the production process and technology adopted. The following is a detailed analysis of the energy consumption in the production of ammonium metatungstate:
Main production processes and their energy consumption
Conversion of solids
Involves the thermal degradation process of ammonium paratungstate (APT).
Energy consumption is high because of the need for high temperature roasting and subsequent cooling processes.
Liquid phase conversion
Involves acid degradation of APT to ammonium metatungstate.
Compared to solid-state conversion, liquid-phase conversion may involve more liquid heating, cooling and separation steps, again resulting in higher energy consumption.
Energy consumption of specific process methods
Thermal decomposition
Thermal decomposition is carried out at 200 to 280°C using APT as the raw material.
This method consumes a large amount of energy despite the relatively low temperatures and the long heat treatment.
Neutralization method
An acid such as nitric acid is used to react with APT to produce ammonium metatungstate.
This method mainly involves liquid heating and stirring, and consumes relatively low energy, but subsequent treatments such as evaporation and crystallization steps also increase energy consumption.
Trends and Strategies for Energy Consumption Reduction
Technological innovation: Reduce energy consumption in the production process by developing new production processes and equipment.
Energy efficiency optimization: Optimize the existing production process, such as improving the heating system and heat recovery efficiency.
Circular economy: Recycle and utilize resources such as waste heat and waste water in the production process to reduce energy consumption and environmental pollution.
The production process of ammonium metatungstate usually involves high energy consumption, which mainly originates from the steps of high-temperature treatment, liquid heating and evaporation and crystallization. In order to reduce energy consumption, strategies such as technological innovation, energy efficiency optimization and circular economy are needed. However, specific energy consumption varies depending on factors such as production processes, equipment, raw materials and operating conditions, and therefore needs to be analyzed and optimized on a case-by-case basis during the actual production process.
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