Process for preparing Portland cement from calcium carbide slag and tailings slag and Portland cement

Abstract

The invention discloses a process for preparing Portland cement by using carbide slag and tailings slag and corresponding Portland cement, which comprises the following steps: 1) Sending calcium carbide slag into a dryer to dry until the moisture is less than 1.5%, and the dehydrated The main component of carbide slag is Ca(OH) 2 Powder; 2) 0.55 to 0.75 parts of dried carbide slag, 0.045 to 0.065 parts of aluminum ash, 0.15 to 0.30 parts of tailings slag, and 0.02-0.04 iron correction raw materials are passed through the batching machine and the electronic belt according to the ratio of parts by weight. The scale is sent to the raw meal mill for grinding to make raw meal powder with a moisture content of less than 1.5%; 3) Homogenize the raw meal powder and send it to the rotary kiln for calcination; 4) After calcination, pass the calcined dry ball through the cooler Cooling; 5) After the dry material balls in step 4) are cooled, add 5.0%-8.0% gypsum to the cooled dry material balls, and send the 12.0%-30.0% mixed material into a ball mill for grinding to obtain different grades Portland cement. The present invention, on the one hand, improves the reuse of waste resources, and on the other hand, also solves the serious threat to life, property and ecology caused by long-term stockpiling of waste.

Description

Technical field [0001] The present invention relates to the field of waste recovery and utilization, and more particularly to the process of preparing silicate cement using an electric grade and tail slag and a corresponding silicate cement. Background technique [0002] Talcumbergage, calculi hydrolysis acquisition of the waste slag of calcium hydroxide as the main component after the acetylene gas. Acetylene (C 2 Hide 2 ) Is one of the important raw materials of the basic organic synthesis industry, with an electric stone (CAC) 2 The process of producing acetylene is simple and mature, and currently accounting for greater specific gravity in my country. 1T electric stone water can generate more than 300 kg of acetylene gas, and a 10t-containing solid waste liquid, commonly known as an electric gravel pulp. Acetylene is the main raw material for producing polyvinyl chloride (PVC). According to the production experience, each production of 1T PVC product consumption of electric s...

AI Technical Summary

Problems solved by technology

It causes serious environmental problems and huge safety hazards, but it is essentially a poor, fine, and miscellaneous mineral resource. If it is well utilized, it is a resource, and if it is not utilized, it is waste. A "time bomb"

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