Strontium carbonate forming and calcining process for preparing strontium oxide

Abstract

The invention relates to a strontium carbonate forming and calcining process for preparing strontium oxide. Strontium carbonate powder or strontium carbonate slurry is adopted as a raw material; wateror strontium carbonate powder is added into the raw material to adjust the moisture ratio; stirring and mixing are conducted to form a brick-shape product; the brick-shape product is conveyed to a storehouse to be dried in the shade, loaded into a kiln car, conveyed to a pre-drying kiln to be dried and conveyed to a tunnel kiln to be calcined to obtain the strontium oxide. According to the process, a brick-making forming process is adopted, the strontium carbonate powder and the strontium carbonate slurry can be adopted as raw materials, the purchasing cost is obviously reduced, the problem that dust is pumped out and wasted in the calcining process of the strontium carbonate powder is solved, and the cost is further saved. The problem of powder calcining and sintering furnaces is avoided, long-time continuous production can be achieved, and the yield is increased. The labor intensity of workers is reduced and the production efficiency is improved. A tunnel kiln calcining process is adopted, energy is fully utilized, calcining time is shortened, high-temperature calcining ensures the decomposition rate, and the strontium oxide content in products is increased.

Description

technical field [0001] The invention relates to a strontium carbonate forming and calcining process for preparing strontium oxide, which belongs to the technical field of chemical production. Background technique [0002] At present, the metal strontium produced in China is all obtained by reduction of strontium oxide, and the strontium oxide is generally obtained by making the raw material strontium carbonate into pellets with a diameter of about 1 mm by pelletizing process, and then calcining the pellets in a rotary kiln to decompose carbon dioxide. This process has strict requirements on raw materials, which must be in the shape of pellets, so the cost of purchasing raw materials is relatively high. The pellet raw material contains dust-like strontium carbonate, which will be drawn out of the calcination area during calcination, and cannot be recycled, causing waste and increasing production costs. In addition, the spherical strontium carbonate calcination process is eas...

AI Technical Summary

Problems solved by technology

This process has strict requirements on raw materials, which must be spherical, so the cost of purchasing raw materials is relatively high

Pellet raw materials contain dusty strontium carbonate, which will be drawn out of the calcination area during calcination, which cannot be recycled, causing waste and increasing production costs

In addition, the spherical strontium carbonate is easy to burn during the calcination process, and the rotary kiln needs to be shut down for 3-5 days per month to clean up. The energy consumption and equipment maintenance costs are high, the production cycle is short, the labor intensity is high, and the environment is harsh

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