An environment-friendly neutralization reactor

Abstract

The invention discloses an environmental-friendly neutralization reaction kettle. The environmental-friendly neutralization reaction kettle comprises a reaction kettle body, a feeding pipe, an ammonia inlet pipe, a discharge hole and a stirring device. The feeding pipe and the ammonia inlet pipe are arranged on the upper portion of the reaction kettle body, the discharge hole is formed below the bottom of the reaction kettle body, the stirring device is arranged in the reaction kettle body, and a cooling coil is also arranged in the reaction kettle body. According to the environmental-friendly neutralization reaction kettle disclosed by the invention, heat generated by the neutralization reaction is fully used to heat cold water in a cooling coil, so that the water temperature at the outlet of the cooling coil reaches 40-50 DEG C, and hot water at the outlet can be used for washing fluorine ions adsorbed by niobium (tantalum) hydroxide. Meanwhile, the cooling coil is arranged in the reaction kettle body to effectively control the reaction temperature, so that the neutralization temperature is lower than 50 DEG C, the volatilization loss of ammonia in the neutralization reaction process is reduced, the production cost is lowered, and the waste gas generating amount is reduced, and therefore, and environmental-friendly and energy-saving effects are achieved.

Description

technical field [0001] The invention relates to the field of neutralization reaction equipment, in particular to an environment-friendly neutralization reaction kettle. Background technique [0002] The production of niobium oxide and tantalum oxide in the hydrometallurgy process of tantalum and niobium uses ammonia as a neutralizing agent, which neutralizes the raw materials with acidic niobium liquid or tantalum liquid to obtain hydroxide, and then washes with hot dilute ammonia water to remove the hydroxide The fluoride ions in the product are finally dried and calcined to obtain niobium oxide and tantalum oxide products. Due to the high acidity of niobium liquid or tantalum liquid, a large amount of heat of reaction is generated during the neutralization reaction, which makes the temperature reach above 90°C, causing a large amount of volatilization loss of ammonia, and the ammonia-containing waste gas produced at the same time increases the difficulty of environmental p...

AI Technical Summary

Problems solved by technology

Due to the high acidity of niobium liquid or tantalum liquid, a large amount of heat of reaction is generated during the neutralization reaction, which makes the temperature reach above 90°C, causing a large amount of volatilization loss of ammonia, and the ammonia-containing waste gas produced at the same time increases the difficulty of environmental pollution control.

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