CN116282982A - Portland cement clinker and preparation method thereof - Google Patents

Abstract

The invention discloses a silicate cement clinker and a preparation method thereof, which relate to the field of silicate cement clinker, and comprise the following components in parts by weight: 82% of lime raw material, 3% of coal oil slag, 10% of sandstone and 5% of steel slag. According to the invention, the particle size of the silicate cement clinker is reasonably proportioned and regulated, so that the abrasion degree of the silicate cement clinker to machinery caused by too small particles can be reduced under the condition of ensuring rapid hydration, the quality of the silicate cement clinker can be more intact under the condition of enough passing temperature and calcining time, the setting speed is more reasonable and rapid, the time for using cement can be provided, and the method is suitable for emergency processing.

Description

A kind of Portland cement clinker and preparation method thereof

technical field

The invention relates to the field of Portland cement clinker, in particular to a Portland cement clinker and a preparation method thereof.

Background technique

Portland cement clinker is made of limestone and clay as the main raw material, which is made into raw meal by crushing, batching, and grinding, and then the raw meal powder is calcined at 1450 ° C in a cement kiln. Portland cement can be obtained by grinding the material and gypsum.

Portland cement sets and hardens quickly, and has high early strength and late strength. It is suitable for concrete with early strength requirements, winter construction concrete, high-strength concrete and prestressed concrete projects for important structures above and below ground. Fast setting and hardening, Portland cement is a more commonly used raw material.

However, the smaller the particles of Portland cement clinker are ground during the grinding process, the finer the cement particles produced, which will cause too much loss to the machine, and the shrinkage of the cement will also increase when it hardens in the air. The solidification speed of Portland cement clinker is affected. In emergency processing, in order to catch up with the speed, the cement solidification speed is too fast. If it is too late to use Portland cement clinker, it will solidify and cannot be used, resulting in waste. How to make it reasonable It becomes a problem to speed up the initial setting speed within a certain period of time and have enough time to use Portland cement clinker. The national standard stipulates that the specific surface area of Portland cement is not less than 300 square meters/kg.

Contents of the invention

Based on this, the object of the present invention is to provide a Portland cement clinker and its preparation method, so as to solve the technical problems mentioned in the background art above.

In order to achieve the above object, the present invention provides the following technical proposal: a portland cement clinker and its preparation method, the components required for the production of Portland cement clinker and their weight ratio include: 82% calcareous raw material and 3% coal-based oil residue plus 10% sandstone plus 5% steel slag ingredients.

A kind of Portland cement clinker of the present invention and preparation method thereof, comprises the following steps:

S1: Prepare raw materials, mix 82% calcareous raw materials with 3% coal-based oil residue, 10% sandstone and 5% steel slag, put them into a micro-grinding machine according to their weight ratio, and grind them to get Portland cement raw material;

S2: Firing, put the ground raw material into the calciner for firing, after the firing is completed, the clinker is obtained, and it is subjected to quenching treatment,

After the above-mentioned raw materials are ground, it is ensured that the particle size of the clinker is controlled at 5-15 mm.

Preferably, in step 2, during the firing process, it is necessary to ensure that the raw meal calcining temperature reaches 1450°C, and the calcining time is 40 minutes

In summary, the present invention mainly has the following beneficial effects:

Compared with the prior art, the present invention can reduce the impact of Portland cement clinker on machinery due to too small particles by rationally proportioning and adjusting the particle size of Portland cement clinker while ensuring rapid hydration. The degree of wear caused by it, and the temperature and calcination time are sufficient, the quality of Portland cement clinker can be more intact, and the setting speed is more reasonable and fast, which can provide time for the use of cement and is suitable for emergency processing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. The following examples are illustrative by referring to the examples, and are only used for explaining the present invention, and should not be construed as limiting the present invention.

The embodiments of the present invention will be described below according to the overall structure of the present invention.

A Portland cement clinker and a preparation method thereof, a Portland cement clinker and a preparation method thereof, comprising, characterized in that: the components required for the production of Portland cement clinker and their weight ratios include: 82 % calcareous raw material and 3% coal-based oil residue plus 10% sandstone plus 5% steel slag ingredients.

This portland cement clinker and preparation method thereof comprise the following steps:

S1: Prepare raw materials, mix 82% calcareous raw materials with 3% coal-based oil residue, 10% sandstone and 5% steel slag, put them into a micro-grinding machine according to their weight ratio, and grind them to get Portland cement raw material;

S2: Firing, putting the ground raw material into a calciner for firing, and clinker is obtained after firing, which is quenched to obtain Portland cement clinker 1 .

Example 2

Mixing 83% calcareous raw materials with 2.5% coal oil residue plus 9% sandstone plus 4.5% steel slag, put them into a micro-grinding machine according to their weight ratio for grinding, and the raw meal of Portland cement can be obtained. After grinding the raw meal, ensure that the particle size of the clinker is controlled at 5-15mm, grind the Portland cement clinker so that the particle size is not less than 7mm and not greater than 10mm, and then fire it, and control the temperature at Burn at 1400°C for 45 minutes to obtain Portland cement clinker 2.

Example 3

Mixing 85% calcareous raw materials with 1.5% coal oil residue, 9.5% sandstone and 4% steel slag, put them into a micro-grinding machine according to their weight ratio, and grind them to get the raw meal of Portland cement. After grinding the raw meal, ensure that the particle size of the clinker is controlled at 5-15mm, grind the Portland cement clinker so that the particle size is not less than 10mm and not greater than 13mm, and then fire it, and control the temperature at Burn at 1500°C for 40 minutes to obtain Portland cement clinker 3.

Although the embodiments of the present invention have been shown and described, this specific embodiment is only an explanation of the present invention, and it is not a limitation of the invention. The specific features, structures, materials or characteristics described can be in any one or more Combining the embodiments or examples in a suitable manner, those skilled in the art can make modifications and replacements without creative contributions to the embodiments as required without departing from the principle and purpose of the present invention after reading this specification and modifications, etc., but as long as they are within the scope of the claims of the present invention, they are all protected by the patent law.

Claims (4)

1. A Portland cement clinker and a preparation method thereof, comprising the Portland cement clinker, which is characterized in that: the components required by producing the silicate cement clinker and the weight ratio thereof comprise: 82% of lime raw material, 3% of coal oil slag, 10% of sandstone and 5% of steel slag.

2. The Portland cement clinker and the preparation method thereof according to claim 1, wherein: comprising the following steps:

s1: preparing materials, namely adding 10% of sandstone into 82% of calcareous raw materials and 3% of coal oil residues and 5% of steel slag ingredients, and putting the materials into a micro-operation grinding machine according to the weight ratio for grinding to obtain raw materials of Portland cement;

s2: and (3) firing, namely placing the ground raw materials into a calciner for firing, obtaining clinker after firing, and quenching the clinker.

3. The Portland cement clinker and the preparation method thereof according to claim 1, wherein: after the raw materials are ground, the granularity of clinker is controlled to be 5-15 mm.

4. The Portland cement clinker and the preparation method thereof according to claim 1, wherein: in the firing process, the calcination temperature of the raw material needs to be ensured to reach 1450 ℃, and the calcination time is 40min.