METHOD FOR QUANTITATIVELY REGULATING CONTENT OF PERICLASE IN CEMENT

Abstract

The present invention relates to the technical field of building materials, in particular to a method for quantitatively regulating the content of periclase in cement. The method comprises: calculating calcination temperature according to formula I; and the formula I is as follows: z=(y−x+3.767)/0.0012 (I), wherein, x represents the content of MgO in the cement clinker, and the unit is wt %; y represents the target content of periclase in the cement, and the unit is wt %; and z represents the calcination temperature, and the unit is ° C. According to the method for quantitatively regulating the content of periclase in cement provided by the present invention, the expected content of periclase in cement can be more accurately obtained, which is more conducive to utilizing the expansion of cement to guide the practical requirements of cement applications in engineering.

Claims

1. A method for quantitatively regulating the content of periclase in cement, comprising: calculating calcination temperature according to formula I; and the formula I is as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.

2. The method according to claim 1, wherein the content of MgO in cement clinker is controlled between 2% and 6%.

3. The method according to claim 1, wherein the calcination temperature is at 1350° C. to 1500° C.

4. The method according to claim 2, wherein the calcination temperature is at 1350° C. to 1500° C.

5. The method according to claim 1, comprising the following steps: (1) preparing cement raw meal to control the content of MgO in cement clinker being between 2% and 6%; (2) calculating calcination temperature according to formula I as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.; and (3) calcining the cement raw meal prepared in step (1) at the calcination temperature calculated in step (2), and cooling to obtain cement clinker.

6. The method according to claim 2, comprising the following steps: (1) preparing cement raw meal to control the content of MgO in cement clinker being between 2% and 6%; (2) calculating calcination temperature according to formula I as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.; and (3) calcining the cement raw meal prepared in step (1) at the calcination temperature calculated in step (2), and cooling to obtain cement clinker.

7. The method according to claim 3, comprising the following steps: (1) preparing cement raw meal to control the content of MgO in cement clinker being between 2% and 6%; (2) calculating calcination temperature according to formula I as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.; and (3) calcining the cement raw meal prepared in step (1) at the calcination temperature calculated in step (2), and cooling to obtain cement clinker.

8. The method according to claim 4, comprising the following steps: (1) preparing cement raw meal to control the content of MgO in cement clinker being between 2% and 6%; (2) calculating calcination temperature according to formula I as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.; and (3) calcining the cement raw meal prepared in step (1) at the calcination temperature calculated in step (2), and cooling to obtain cement clinker.

9. The method according to claim 5, further comprising the step of mixing the cement clinker obtained in step (3) with gypsum and milling the resultant mixture.

10. The method according to claim 6, further comprising the step of mixing the cement clinker obtained in step (3) with gypsum and milling the resultant mixture.

11. The method according to claim 7, further comprising the step of mixing the cement clinker obtained in step (3) with gypsum and milling the resultant mixture.

12. The method according to claim 8, further comprising the step of mixing the cement clinker obtained in step (3) with gypsum and milling the resultant mixture.

13. The method according to claim 1, comprising the following steps of: (1) preparing cement raw meal to control the content of MgO in cement clinker being between 2% and 6%; (2) calculating calcination temperature according to formula I as follows:
z=(y−x+3.767)/0.0012   I; wherein, x represents the content of MgO in cement clinker, the unit is wt %; y represents the target content of periclase in cement, the unit is wt %; and z represents the calcination temperature, the unit is ° C.; (3) calcining the cement raw meal prepared in step (1) at the calcination temperature calculated in step (2), and cooling to obtain cement clinker; and (4) mixing the cement clinker obtained in step (3) with gypsum and milling the resultant mixture.

Description

SPECIFIC MODES FOR CARRYING OUT THE EMBODIMENTS

[0034] The following Examples are intended to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] If the specific technology or condition is not indicated in Examples, it shall be carried out in accordance with the technology or condition described in the documents in the art or in accordance with the product specification. If the reagents or instruments used in the present invention are without indicated manufacturer, they will be conventional products that can be purchased through regular channels.

EXAMPLES 1-9

[0036] Examples 1-9 carry out important parameter regulation and the measurement of periclase content for cement with different periclase contents, specifically as follows:

[0037] In Examples 1 to 9, the raw materials from Huaxin Cement (Kunming Dongchuan) Co., Ltd. were used to prepare cement with different periclase contents. The content of periclase in the prepared cement was determined by “Quantitative determination the content (in mass) of periclase in cement by subtraction method” (refer to Chinese patent No. ZL 201710183748.3), so as to verify the accuracy of the method provided by the present invention.

[0038] The regulation of important parameters and the measured content of periclase in cement in Examples 1-9 are shown in Table 1. It can be seen from Table 1 that the difference between the measured content and the target content of periclase in cement is very small, within 0.02% for all Examples, indicating that the method for quantitatively regulating the content of periclase in cement provided by the present invention is reliable and accurate.

TABLE-US-00001 TABLE 1 Regulation of important parameters of cement with different periclase contents and measured results of periclase content in cement Example Example Example Example Example Example Example Example Example 1 2 3 4 5 6 7 8 9 Content of MgO in 2 2.5 3 3.5 4 4.5 5 5.5 6 cement clinker/% Target content of 0.033 0.353 0.973 1.413 1.913 2.473 3.033 3.353 4.033 periclase in cement/% Calcination temperature/ 1500 1350 1450 1400 1400 1450 1500 1350 1500 ° C. Measured content of 0.034 0.345 0.958 1.428 1.926 2.464 3.015 3.339 4.041 periclase in cement/% Difference between 0.001 −0.008 −0.015 0.015 0.013 −0.009 −0.018 −0.014 0.008 measured content and target content of periclase in cement/%

[0039] Although the present invention has been described in detail with general description and specific embodiments, it is obvious to a person skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention are all within the scope of the claimed protection of the present invention.