A kind of silicon calcium potassium fertilizer cooling process and equipment

Abstract

The invention discloses a silicon-calcium-potassium fertilizer cooling process, comprising the following steps: 1) cooling drawn silicon-calcium-potassium fertilizer clinker to 500-700 DEG C with a first single-cylinder cooler by spraying water; 2) crushing the silicon-calcium-potassium fertilizer clinker cooled by spraying water to be less than 25mm by adopting a high-temperature roll crusher; 3) carrying out air cooling on the crushed silicon-calcium-potassium fertilizer clinker to be less than 100 DEG C by adopting a grate cooler or a second single-cylinder cooler, and simultaneously introducing the hot air discharged from the grate cooler or the second single-cylinder cooler into a rotary kiln and a decomposing furnace to respectively serve as secondary air and ternary air for supporting the combustion of a fuel. The invention also discloses equipment for implementing the silicon-calcium-potassium fertilizer cooling process. The process can be applied to drawn high-temperature sticky clinker or caked clinker, can be used for effectively cooling the high-temperature silicon-calcium-potassium fertilizer clinker and recovering waste heat, can improve the running rate of the equipment and has the characteristics of saving energy and reducing the production cost.

Description

Technical field [0001] The invention belongs to the technical field of silicon-calcium-potassium fertilizer production, and specifically relates to a cooling process and equipment for silicon-calcium-potassium fertilizer after being calcined by a rotary kiln. Background technique [0002] In recent years, the use of water-insoluble potassium ore has gradually got rid of the original idea of ​​using potassium alone, and has developed into a technical idea of ​​comprehensive utilization of silicon, calcium, potassium and other elements. Silicon calcium potassium fertilizer contains potassium, silicon, calcium, magnesium and other elements. It is a high-quality soil conditioner and can improve the soil fertility in my country on a large scale. Using water-insoluble potassium ore (such as potash feldspar) and limestone (or dolomite) as raw materials to produce silicon-calcium potassium fertilizer, there are currently three main methods: traditional fire method, tunnel kiln sintering ...

AI Technical Summary

Problems solved by technology

The main problem of directly using the grate cooler to cool the silicon-calcium-potassium fertilizer clinker is that the silicon-calcium-potassium fertilizer clinker may be in a semi-molten state during the high-temperature calcination process of the rotary kiln, and clinker may become sticky and block the grate of the fixed grate plate of the grate cooler. cracks, "snowman" and other problems, or there may be large lumps of clinker, which cannot be cooled normally, which will seriously affect the safe operation of equipment and the effective cooling of clinker

These large pieces of clinker usually cannot be cooled completely, and the heat in the center part is relatively high, and the heat is difficult to use effectively

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