Process for producing strontium carbonate and barium carbonate without continuous carbonization of hydrogen sulfide gas holder

Abstract

The application of the present invention discloses a process for continuously carbonizing strontium carbonate and barium carbonate without hydrogen sulfide gas tank, which includes the following process steps: the first step is to pass the strontium sulfide or barium sulfide liquid through the liquid feed pipe first from the first carbonization tower The upper part is sprayed down; the second step is to adjust the flow rate to maintain a stable liquid level in the first carbonization tower; the third step is to adjust the flow rate to maintain a stable liquid level in the second carbonization tower, and so on; The fourth step is to completely react carbon dioxide with strontium sulfide or barium sulfide solution, and the hydrogen sulfide gas produced is discharged from the exhaust pipe at the top of the first carbonization tower into the subsequent production process; the fifth step is to discharge strontium sulfide or barium strontium sulfide slurry , and then adjust the flow rate to maintain a stable liquid level in the last carbonization tower; the sixth step is to start the car and start continuous production according to the above process. By adopting the process of the invention, the hydrogen sulfide gas tank can be eliminated, and at the same time, the production stability of the follow-up process using hydrogen sulfide as a raw material can be guaranteed.

Description

technical field [0001] The invention belongs to the field of calcium, strontium or barium compounds, in particular to a process for producing strontium carbonate and barium carbonate by continuous carbonization in a hydrogen sulfide-free cabinet. Background technique [0002] Strontium carbonate (nanometre), white powder or granules, odorless and tasteless, mainly used in glass bulbs, magnetic materials, metal smelting and strontium salt preparation. [0003] Barium carbonate is a kind of hexagonal fine crystal or white powder, which is mainly used in electronics, instrumentation and metallurgy industries. Preparation of fireworks, signal flares, ceramic coatings, accessories for optical glass. Also used as rodenticide, water clarifier and filler. [0004] Strontium carbonate can be prepared by carbonization reaction of strontium sulfide solution and carbon dioxide; barium carbonate can be prepared by carbonization reaction of barium sulfide solution and carbon dioxide. I...

AI Technical Summary

Problems solved by technology

However, hydrogen sulfide is a flammable and hazardous chemical, which can form an explosive mixture when mixed with air, and can cause combustion and explosion when exposed to open flames and high heat. Therefore, hydrogen sulfide gas stored in a gas cabinet is still very dangerous.

In order to ensure the stability of the follow-up production process using hydrogen sulfide as raw material, it is necessary to install a gas cabinet. The reason is that the current production process is an old process more than ten years ago, and the old process technology is backward and cannot achieve continuous production. Therefore, Both strontium carbonate and barium carbonate are indirect production methods, which cannot guarantee the stability of the hydrogen sulfide gas produced

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