System and method for preparing cement clinker

Abstract

The invention discloses a system and method for preparing cement clinker. The system comprises a dewatering device, a drying crusher, a mixing device, a grinding device, a first preheating device, a decomposing device, a second preheating device, a calcination device and a cooling device; and the dewatering device has a carbide slag inlet and a dehydrated carbide slag outlet, the drying crusher has a dehydrated carbide slag inlet and a dry carbide slag particle outlet, the mixing device has a silicon based correcting agent inlet, an aluminum based correcting agent inlet, an iron based correcting agent inlet and a mixed correction material outlet, the grinding device has a mixed correction material inlet and a mixed correction powder material outlet, the first preheating device has a mixedcorrection powder material inlet and a first-preheated material outlet, the decomposing device has a dry carbide slag particle inlet and a decomposed material outlet, the second preheating device hasa material inlet and a second-heat-exchanged material outlet, the calcination device has a second-heat-exchanged material inlet and a high-temperature cement clinker outlet, and the cooling device hasa high-temperature cement clinker inlet and a cement clinker outlet.

Description

technical field [0001] The invention belongs to the field of cement production, in particular, the invention relates to a system and a method for preparing cement clinker. Background technique [0002] Carbide slag is the residue after calcium carbide hydrolysis, the main component is Ca(OH) 2 . In 2015, about 25 million tons of calcium carbide were produced in the country, and if each ton of calcium carbide was hydrolyzed to produce about 1.2 to 1.5 tons of carbide slag, about 30 million to 37.5 million tons of calcium carbide slag could be produced. In recent years, the cumulative amount of calcium carbide slag in my country has exceeded 100 million tons. Stacking it not only takes up a lot of land, but also the water in the calcium carbide slag slurry penetrates into the groundwater, causing problems such as land alkalization and water resource pollution. Carbide slag is easy to raise dust when exposed to the wind after being stacked for a long time and air-dried, which...

AI Technical Summary

Problems solved by technology

In recent years, the cumulative amount of calcium carbide slag in my country has exceeded 100 million tons. Stacking it not only takes up a lot of land, but also the water in the calcium carbide slag slurry penetrates into the groundwater, causing problems such as land alkalization and water resource pollution.

Carbide slag is easy to raise dust when exposed to wind after long-term stacking and drying, which poses a great threat to the surrounding environment

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