CN103848581A

CN103848581A - Cement clinker and preparation method thereof

Info

Publication number: CN103848581A
Application number: CN201210519127.5A
Authority: CN
Inventors: 王凤英
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2014-06-11

Abstract

The invention relates to a cement clinker. The cement clinker is prepared from the following required raw material components by mass percent: 30% to 67% of waste concrete, 5% to 10% of aluminum oxide, 5% to 10% of ferric oxide, 10% to 20% of limestone, 5% to 15% of sandstone, 5% to 10% of clay and 3% to 5% of sulfuric-acid residue. A method for preparing the cement clinker comprises the following steps: smashing the waste concrete taken as a raw material and screening granules with the granule diameter of 25mm to 45mm; smashing the other raw materials and evenly mixing with the waste concrete granules so as to be grinded into raw cement powder with the granule diameter less than 2mm; and adding water into the raw cement powder, calcining and cooling, thereby obtaining the cement clinker. The cement prepared from the cement clinker produced by using the method is high in strength and convenient for the resource utilization of the waste concrete, can be used for reducing the adding amount of high-quality limestone and is obvious in coal-saving and electricity-saving effects, thereby having obvious social and economic benefits. Thus, the natural environment is protected; the environmental pollution is reduced; and the recycling of resources is realized.

Description

A kind of cement clinker and preparation method

Technical field

The invention belongs to building material field, resource circulation utilization field, be specifically related to a kind of cement clinker and preparation method.

Background technology

At present, the quantity of China's building waste has accounted for 30%～40% of municipal wastes total amount.Along with the development of national economy and construction industry, the discarded concrete enormous amount producing because removing old building every year, the building waste producing has become a large refuse pollution source in city, overwhelming majority building waste is without any processing, just transported to countryside or rural area by unit in charge of construction, adopt the mode of air storage or landfill to process, consume a large amount of pork barrels such as land acquisition expense, refuse collection, meanwhile, cause the severe contamination to environment and the huge waste to the energy.

Discarded concrete is a kind of concrete having hardened, mainly formed by hydrated cement paste (Behavior of Hardened Cement Paste), Aggregate etc., they are " having misplaced local resource " in fact, as the art breading through suitable, can turn waste into wealth, become industrial raw material or the energy, adapt to the needs of China's urbanization and urban infrastructure, meet every policy of country.

Summary of the invention

The present invention in order to solve the problem of discarded concrete contaminate environment, waste resource, proposes a kind of cement clinker and preparation method, to reach the object of conservation of nature environment, Resource Recycling Utilization just.

Technical scheme of the present invention:

A kind of cement clinker, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 30%～67%, aluminum oxide 5%～10%, ferric oxide 5%～10%, limestone 10%～20%, sandstone 5%～15%, clay 5%～10%, sulfate slag 3%～5%.

A method of preparing this cement clinker, step is as follows: lay in enough discarded concretes as raw material, its main component is limestone; Smash discarded concrete raw material, sift out the particle that particle diameter is 25～45mm; Other raw materials (sulfate slag of limestone, sandstone, clay, aluminum oxide, ferric oxide, oven dry) are smashed, mixed with discarded concrete uniform particles, grind to form the cement slurry powder that particle diameter is less than 2mm; Cement slurry powder, through conventional adding water, calcining, cooling method for manufacturing, is cement clinker.

Beneficial effect of the present invention:

1. the strength of cement that prepared by this cement clinker is high, can be used as the concrete gelling material of preparation and uses, and ratio and the utilization ratio of discarded crushed stone concrete in cement clinker raw material is all very high, is convenient to the recycling of discarded concrete;

2. can reduce the consumption of fat lime stone, be beneficial to the area that limestone resource is deficienter and use;

As long as 3. set up batching metering, and do not change other techniques of existing Vertical Kiln for Cement Production;

4. the effect of economizing on coal, economizing on electricity is remarkable, has significant society and economic benefit;

5. conservation of nature environment, reduces environmental pollution, Resource Recycling Utilization;

Embodiment

A kind of cement clinker, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 30%～67%, limestone 10%～20%, sandstone 5%～15%, clay 5%～10%, aluminum oxide 5%～10%, ferric oxide 5%～10%, sulfate slag 3%～5%.

Below in conjunction with specific embodiment, the invention will be further described.

embodiment 1

A kind of cement clinker, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 67%, limestone 10%, sandstone 5%, clay 5%, aluminum oxide 5%, ferric oxide 5%, sulfate slag 3%.

embodiment 2

A kind of cement clinker, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 45%, limestone 10%, sandstone 5%, clay 10%, aluminum oxide 5%, ferric oxide 10%, sulfate slag 5%.

embodiment 3

A kind of cement clinker, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 30%, limestone 20%, sandstone 15%, clay 10%, aluminum oxide 10%, ferric oxide 10%, sulfate slag 5%.

Above-described embodiment is only used for further illustrating the present invention; but the present invention is not limited to embodiment; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all fall in the protection domain of technical solution of the present invention.

Claims

1. a cement clinker, is characterized in that, the mass percent scope of preparing desired raw material composition is as follows: discarded concrete 30%～67%, aluminum oxide 5%～10%, ferric oxide 5%～10%, limestone 10%～20%, sandstone 5%～15%, clay 5%～10%, sulfate slag 3%～5%.

2. prepare a method for cement clinker as claimed in claim 1, it is characterized in that, step is as follows: lay in enough discarded concretes as raw material, its main component is limestone; Smash discarded concrete raw material, sift out the particle that particle diameter is 25～45mm; The sulfate slag that is limestone, sandstone, clay, aluminum oxide, ferric oxide, oven dry other raw materials is smashed, and mixes with discarded concrete uniform particles, grinds to form the cement slurry powder that particle diameter is less than 2mm; Cement slurry powder, through conventional adding water, calcining, cooling method for manufacturing, is cement clinker.