CN109020278A

CN109020278A - A kind of anti-oxidation white cement clinker bleaching process

Info

Publication number: CN109020278A
Application number: CN201811281311.4A
Authority: CN
Inventors: 黄少文; 曾嵘; 吴飞龙; 朱杰
Original assignee: Jiangxi Cathaya White India Cements Ltd
Current assignee: Jiangxi Cathaya White India Cements Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2018-12-18

Abstract

The invention discloses a kind of anti-oxidation white cement clinker bleaching process, the bleaching process includes the following steps: S1: the calcining white cement clinker in rotary kiln；S2: white cement clinker is discharged after baking from the discharge end of rotary kiln, and during discharge, and the mixture for adding heavy oil or petroleum coke powder and water to white cement clinker prevents the oxidation reaction of white cement clinker as reducing agent；S3: after being mixed into the discharge end of high-temperature white cement clinker discharge rotary kiln of reducing agent, cooling bleaching is carried out into grate-cooler or water cooling bleaching machine, to obtain product；The present invention is in the process of production white cement, oxidation reaction occurs for the white cement clinker and air for adding reducing agent by the discharge end in rotary kiln to prevent high temperature, oxidation reaction blackening occurs when being discharged and contact with air from rotary kiln so as to avoid white cement clinker, and then improves the product quality of white cement.

Description

A kind of anti-oxidation white cement clinker bleaching process

Technical field

The invention belongs to white cement bleaching fields, and in particular to a kind of anti-oxidation white cement clinker bleaching process.

Background technique

It needs just to can guarantee that clinker has good object by air-cooled sharply cooling after Portland clinker high temperature firing Mechanical property is managed, and white portland cement will usually spray water (or water drenching or immersion) chilling to increase vitreum to improve clinker Whiteness (is bleached).In process of production, clinker is gone forward side by side after the firing of rotary kiln from the discharge of the discharge end of rotary kiln Enter and carry out cooling bleaching in grate-cooler or water cooling bleaching machine, but is discharged in the clinker of high temperature from the discharge end of rotary kiln When, oxidation reaction can be occurred by contacting with air, cause clinker to support blackening, thus influence production white cement whiteness and Its quality.

Summary of the invention

The object of the present invention is to provide a kind of anti-oxidation white cement clinker bleaching process, are being discharged with solving clinker Rotary kiln is that there is a phenomenon where oxidation reactions.

The technical solution provided by the present invention is: a kind of anti-oxidation white cement clinker bleaching process, which is characterized in that institute Bleaching process is stated to include the following steps:

S1: the calcining white cement clinker in rotary kiln；

S2: white cement clinker is discharged after baking from the discharge end of rotary kiln, and during discharge, ripe to white cement Material addition reducing agent, prevents the oxidation reaction of white cement clinker；

S3: after being mixed into the discharge end of high-temperature white cement clinker discharge rotary kiln of reducing agent, into grate-cooler or water cooling Bleaching machine carries out cooling bleaching, to obtain product.

Preferably, the reducing agent in the step 2 uses heavy oil or emulsification heavy oil.

Preferably, it is inserted with jet pipe at the discharge end of the rotary kiln, nozzle, the heavy oil or cream are covered on the jet pipe Change the discharge end that heavy oil imports rotary kiln by jet pipe, and sprayed by nozzle, to be blended in white cement clinker.

Preferably, the reducing agent in the step 2 uses the mixture of petroleum coke powder and water.

Preferably, be inserted with auxiliary coal injection pipe and injection spray pipe at the discharge end of the rotary kiln, the auxiliary coal injection pipe with It is covered with nozzle on injection spray pipe respectively, the petroleum coke powder is sprayed by the nozzle of auxiliary coal injection pipe, and the injection spray pipe sprays simultaneously Water generates water-gas, and then completely cut off white cement clinker and air so that petroleum coke powder and water are blended in white cement clinker simultaneously Oxidation reaction occurs for contact.

The utility model has the advantages that

The present invention adds reducing agent in the process of production white cement, through the discharge end in rotary kiln to prevent high temperature Oxidation reaction occurs for white cement clinker and air, hair when being discharged and contact with air from rotary kiln so as to avoid white cement clinker Raw oxidation reaction blackening, and then improve the product quality of white cement.

Detailed description of the invention

Fig. 1 is that the present invention uses the operation schematic diagram of heavy oil or emulsification heavy oil as reducing agent when；

Fig. 2 is that the present invention uses operation schematic diagram of the mixture of petroleum coke powder and water as reducing agent when.

In figure: 1- rotary kiln, 2- jet pipe, 3- assist coal injection pipe, 4- injection spray pipe, 5- main jet pipe.

Specific embodiment

Embodiments of the present invention will be further described below with reference to the accompanying drawings.

Embodiment one

As shown in Figure 1, the white cement clinker bleaching process that one of the present embodiment is anti-oxidation, the bleaching process include Following steps:

S1: the calcining white cement clinker in rotary kiln 1；

S2: white cement clinker is discharged after baking from the discharge end of rotary kiln 1, and during discharge, to white cement Clinker adds reducing agent, prevents the oxidation reaction of white cement clinker；

S3: after being mixed into the discharge end of high-temperature white cement clinker discharge rotary kiln 1 of reducing agent, into grate-cooler or water cooling Bleaching machine carries out cooling bleaching, to obtain product.

Preferably, the reducing agent in the step 2 uses heavy oil；It is inserted with jet pipe 2 at the discharge end of the rotary kiln 1, It is covered with nozzle on the jet pipe 2, the heavy oil imports the discharge end of rotary kiln 1 by jet pipe 2, and is sprayed by nozzle, thus It is blended in white cement clinker.

The white cement clinker of high temperature can contact with air when rotary kiln 1 is come out of the stove and generate oxidation reaction, lead in the present embodiment It crosses at the discharge end of rotary kiln 1 and adds heavy oil as reducing agent, and by being equipped with jet pipe 2 in 5 lower part of main jet pipe of rotary kiln It adds, so that white cement clinker surface generates water-gas, isolation air is contacted with white cement clinker, to effectively prevent White cement clinker is contacted with air occurs oxidation reaction.

Embodiment two

As shown in Fig. 2, the white cement clinker bleaching process that one of the present embodiment is anti-oxidation, the bleaching process include Following steps:

S1: the calcining white cement clinker in rotary kiln 1；

In the present embodiment, the reducing agent in the step 2 uses the mixture of petroleum coke powder and water；The rotary kiln goes out Auxiliary coal injection pipe 3 and injection spray pipe 4 are inserted at material end, the auxiliary coal injection pipe 3 and injection spray pipe 4 are located at the lower section of main jet pipe 5, institute It states and is covered with nozzle on auxiliary coal injection pipe 3 and injection spray pipe 4 respectively, the petroleum coke powder is sprayed by the nozzle of auxiliary coal injection pipe 3, institute It states injection spray pipe 4 while spraying water, so that petroleum coke powder and water are blended in white cement clinker simultaneously, generation water-gas, and then every Exhausted white cement clinker is contacted with air occurs oxidation reaction.

It is convenient for statement, herein referred "upper", "lower", "left", "right", "front", "rear" etc. represent the description in direction with The left and right directions of attached drawing itself is consistent, but does not play restriction effect to structure of the invention；In addition, the invention is not limited to upper State specific embodiment, those skilled in the art can also make a variety of variations accordingly, but it is any with it is of the invention equivalent or similar Variation should all cover within the scope of the claims.

Claims

1. a kind of anti-oxidation white cement clinker bleaching process, which is characterized in that the bleaching process includes the following steps:

S1: the calcining white cement clinker in rotary kiln (1)；

S2: white cement clinker is discharged after baking from the discharge end of rotary kiln (1), and during discharge, ripe to white cement Material addition reducing agent, prevents the oxidation reaction of white cement clinker；

S3: it after being mixed into the discharge end of high-temperature white cement clinker discharge rotary kiln (1) of reducing agent, is floated into grate-cooler or water cooling White machine carries out cooling bleaching, to obtain product.

2. the anti-oxidation white cement clinker bleaching process of one kind according to claim 1, it is characterised in that:

Reducing agent in the step 2 uses heavy oil or emulsification heavy oil.

3. the anti-oxidation white cement clinker bleaching process of one kind according to claim 2, it is characterised in that:

It is inserted with jet pipe (2) at the discharge end of the rotary kiln (1), is covered with nozzle, the heavy oil or emulsification on the jet pipe (2) Heavy oil imports the discharge end of rotary kiln (1) by jet pipe (2), and is sprayed by nozzle, to be blended in white cement clinker.

4. the anti-oxidation white cement clinker bleaching process of one kind according to claim 1, it is characterised in that:

Reducing agent in the step 2 uses the mixture of petroleum coke powder and water.

5. the anti-oxidation white cement clinker bleaching process of one kind according to claim 4, it is characterised in that:

Auxiliary coal injection pipe (3) and injection spray pipe (4), the auxiliary coal injection pipe (3) and spray are inserted at the discharge end of the rotary kiln It is covered with nozzle on mist pipe (4) respectively, the petroleum coke powder is sprayed by the nozzle of auxiliary coal injection pipe (3), and the injection spray pipe (4) is same When spray water, so that petroleum coke powder and water are blended in white cement clinker simultaneously, generate water-gas, and then completely cut off white cement clinker It is contacted with air and oxidation reaction occurs.