Potassium feldspar drying and sintering kiln

Abstract

The invention discloses a potash feldspar drying sintering kiln. The potash feldspar drying sintering kiln comprises an obliquely arranged rotary kiln; a kiln body comprises a preheating section, a sintering section and a cooling section from a feeding end to a discharge end. At the preheating section, materials premixed with sulfuric acid needs to be reacted with hydrofluoric acid and preheated and finally enter the sintering section to be calcined after generating into materials in a solid-liquid mixing state. The exterior of the sintering section is provided with a combustion chamber, the sintering section is heated through high temperature radiation generated through the combustion chamber, and the temperature of the sintering section is easy to be controlled and the heating temperature is easy to be controlled within a low range by the external radiation heating mode compared with a traditional naked flame heating mode inside the kiln. The potash feldspar drying sintering kiln has the advantages achieving continuous intermittent calcination of the potash feldspar, saving time-and-energy wasting material preparation, cooling and transferring processes and enabling a process from materials to a finished product to be achieved in one kiln body, allowing unattended 24-hour full-time work and improving the production efficiency compared with a traditional shaft kiln and blast-furnace equipment potash feldspar calcination mode.

Description

technical field [0001] The invention relates to a drying and calcining kiln, in particular to a drying and calcining kiln for calcining potassium feldspar at low temperature. Involves patent classification number F27 furnace; kiln; baking furnace; distillation furnace F27B general distillation furnace, kiln, baking furnace or distillation furnace; open sintering equipment or similar equipment F27B7 / 00 rotary furnace, that is, horizontal or slightly inclined. Background technique [0002] Potassium is mostly used as fertilizer, and it is one of the three nutrient elements that determine agricultural production. The main source of potassium fertilizer extraction is soluble potassium salt deposits, while most of our country is insoluble potassium ore resources. Potassium ions are difficult to dissociate in the natural environment and basically cannot be absorbed by plants. In order to meet the large domestic demand for potash fertilizers, it has become a major issue to extract...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the existing potassium feldspar production process requires the cooperation of multiple equipments and cannot be completed at one time, and develops a kind of potassium feldspar drying and sintering kiln, which includes: a rotary kiln body arranged obliquely, and the kiln body is made of From the end to the discharge end, it includes a preheating section, a sintering section and a cooling section in sequence

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