Method for preparing cement clinker by using oil shale waste residues

Abstract

The invention discloses a method for preparing cement clinker by using oil shale waste residues. The method comprises the following steps of: 1, mixing the following components according to the following proportions: 81 to 84 percent of limestone, 12 to 15 percent of shale waste residues, 1 to 2 percent of iron tailings sand and 2 to 4 percent of moulding sand; and 2, grinding the mixture obtained in the step 1 to obtain raw materials which is screened by a 80um square-hole sieve of which the screen residue is less than 5 percent, calcining the raw materials at temperature of between 1,350 and 1,450 DEG C for 15 to 20 minutes, and cooling to obtain the cement clinker. The method is used for preparing the cement clinker by using the oil shale waste residues replacing clay, so that a large quantity of clay resources are saved, and the production cost of the cement is reduced; furthermore, the doped quantity of the oil shale waste residues is large and up to 13 percent, so that the oil shale waste residues are used fully; therefore, the economic benefit is increased, wastes are turned into treasures, a large quantity of stacked residues are avoided, the land occupied amount is reduced, and the environment pollution is reduced.

Description

1. Technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing cement clinker with oil shale waste residue. 2. Background technology [0002] my country is rich in oil shale resources, and the recoverable shale oil resources are 12 billion tons, mainly distributed in Huadian, Nong'an, Jilin Province, Maoming, Guangdong, and Fushun, Liaoning, ranking fourth in the world. The main utilization methods of oil shale resources are refining shale oil and direct combustion for power generation. Taking Fushun as an example, nearly 400,000 tons of shale oil is produced from oil shale every year, and 5 million tons of oil shale waste residue is produced a year. At present, there are not many methods for effectively utilizing oil shale residues, resulting in a large accumulation of oil shale residues, which not only occupies a large area of ​​land, but also has a relatively large environmental pollution ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing cement clinker with oil shale waste residue, which can turn oil shale waste residue into treasure, thereby solving the problems of land occupation and environmental pollution, and at the same time better achieve oil shale The purpose of rock comprehensive utilization