Cement clinker production system

Patent metadata

Field	Value
Publication number	US-9868666-B2
Application number	US-201214367494-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 26, 2011
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The cement clinker production system includes: a first supplying section configured to supply a sulfur source and a fluorine source of mineralizer; a second supplying device configured to supply clinker raw material; a crusher configured to crush the mixed raw material obtained by mixing the clinker raw material with the fluorine source of the mineralizer; a kiln configured to burn the crushed mixed raw material; an introducing section configured to introduce the sulfur source of the mineralizer to the kiln; a third supplying section configured to supply fuel to the kiln; and a test sample-analyzing system configured to collect each of the mixed raw material before the burning and the clinker after the burning and to measure amounts of the fluorine, main components and free lime depending on the type collected.

First claim

The invention claimed is:

1. A cement clinker production system, comprising:
a first supplying section configured to supply a fluorine source of mineralizer and a clinker raw material;
a mixing section configured to mix the supplied clinker raw material with the supplied fluorine source of the mineralizer to obtain the mixed raw material;
a crushing section configured to crush the mixed raw material; and
an introducing section configured to introduce a sulfur source of the mineralizer, fuel and the crushed mix raw material to the kiln to produce a clinker by burning the crushed mix raw material,
wherein
the cement clinker production system further comprises a test sample-analyzing system,
the test sample-analyzing system comprising:
a collecting section configured to collect each of the mixed raw material before the burning and the clinker after the burning;
a bead section configured to make the collected mixed raw materials into a beads mixed raw material test sample;
a first pressing section configured to make the collected mixed raw materials into a pressed mixed raw material test sample;
a second pressing section configured to make the collected clinker into a pressed clinker test sample;
a first measurement section configured to measure the amount of the fluorine of the mixed raw material from the pressed mixed raw material test sample;
a second measurement section configured to measure the amounts of the sulfur trioxide and main components of the mixed raw material from the beads mixed raw material test sample; and
a third measurement section configured to measure the amounts of the sulfur trioxide, the fluorine, main components and free lime of the clinker from the pressed clinker test sample,
thereby controlling at least any one of the supply amount of the fluorine source and the sulfur source, the supply amount of the mixed raw material, and the supply amount of the fuel based on the measured amounts by the test sample-analyzing system.

2. The cement clinker production system according to claim 1 , wherein
the test sample-analyzing system comprises:
an X-ray diffraction analyzer; and
a fluorescent X-ray analyzer, wherein
the amounts of the sulfur trioxide, the fluorine and the main components of the mixed raw material and the clinker, and the amount of the free lime of the clinker are measured by the X-ray diffraction analyzer or the fluorescent X-ray analyzer, and
at least any one of the supply amount of the fluorine source and the sulfur source of the mineralizer, the supply amount of the mixed raw material and the supply amount of the fuel is controlled based on the measured amounts.

3. The cement clinker production system according to claim 1 , wherein
in the test sample-analyzing system, amounts of the sulfur trioxide, the fluorine and the main components are measured by the fluorescent X-ray analyzer after the preparation to the beads or pressed sample from the mixed raw material before the burning,
the amount of the free lime of the clinker is measured by the X-ray diffraction analyzer after the preparation to the pressed sample,
the amounts of the fluorine and the main components are measured by the fluorescent X-ray analyzer, and
control signals corresponding to the measured amounts are transmitted to the first supplying section of the fluorine source and the sulfur source of the mineralizer and a supplying section of the mixed raw material, thereby controlling the supply amounts.

4. The cement clinker production system according to claim 1 , wherein
the test sample-analyzing system comprises:
a test sample inlet into which the collected mixed raw material and clinker test sample are carried;
a crusher configured to crush the test sample;
a bead maker configured to make the crushed test sample into beads;
a pressing section configured to press the crushed test sample;
an X-ray diffraction analyzer;
a fluorescent X-ray analyzer;
a test sample removing portion; and
a distributor configured to distribute the test sample via the test sample removing portion, wherein
the test sample inlet, the bead maker to make the crushed test sample into beads, the pressing section to press the crushed test sample, the X-ray diffraction analyzer, the fluorescent X-ray analyzer and the test sample removing portion are arranged circularly,
the distributor is placed at the center of the circular arrangement thereof, and
each of the test sample of the mixed raw material and the clinker test sample is distributed by the distributor with the devices through the distributor depending on the type of test sample.

5. The cement clinker production system according to claim 1 , wherein
the mixed raw material is a feed stock obtained by mixing the fluorine source with the clinker raw material, the clinker raw material being obtained by adding collecting dust to raw material fine powder in which coal ash is mixed.

6. The cement clinker production system according to claim 2 , wherein in quantifying the fluorine amount or free lime amount, the samples are pressed into pressed samples and the resultant pressed samples are subjected to analysis of mineral components by X-ray diffraction to quantify the fluorine amount or the free lime amount.

Assignees

• Mitsubishi Materials Corp

Inventors

• Yamashita Makio
• Tanaka Hisanobu
• Tanaka Yukio
• Ichihara Katsuhiko
• Sakamoto Kazuo
• Tabata Kazuo

Classifications

• G01N23/223 Primary

  by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence · CPC title

• C04B7/361

  Condition or time responsive control in hydraulic cement manufacturing processes (controlling or regulating in general G05; F27B7/42 takes precedence) · CPC title

• C04B7/4446 Primary

  the fuel being treated in a separate gasifying or decomposing chamber, e.g. a separate combustion chamber · CPC title

• Y02P40/121

  Energy efficiency measures, e.g. improving or optimising the production methods · CPC title

• G01N33/38

  Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass · CPC title