WO2023015619A1

WO2023015619A1 - Solid waste-based white sulphoaluminate cement, and preparation method therefor and use thereof

Info

Publication number: WO2023015619A1
Application number: PCT/CN2021/115074
Authority: WO
Inventors: 王文龙; 姚永刚; 吴长亮; 姚星亮; 武双; 蒋稳; 王旭江; 李敬伟; 毛岩鹏
Original assignee: 山东大学
Priority date: 2021-08-10
Filing date: 2021-08-27
Publication date: 2023-02-16
Also published as: CN113511826A; CN113511826B

Abstract

A solid waste-based white sulphoaluminate cement, and a preparation method therefor and the use thereof. The solid waste-based white sulphoaluminate cement comprises, in parts by mass, 50-80 parts of a solid waste-based white sulphoaluminate cement clinker, 5-20 parts of a white desulfurization gypsum from a steel plant, and 10-30 parts of limestone. The solid waste-based white sulphoaluminate cement clinker comprises, in parts by mass, 41-46 parts of electroplating residues of aluminum profiles, 10-17 parts of a white desulfurization gypsum from a steel plant, 10-13 parts of wollastonite, and 29-34 parts of limestone. The solid waste-based white sulphoaluminate cement not only effectively reduces the production cost of a white sulphoaluminate cement, but also can reduce environmental hazards caused by industrial solid waste and realize the reduction, resource recovery and high-value utilization of industrial solid waste. In addition, the later strength of the prepared solid waste-based white sulphoaluminate cement is significantly increased, such that the large-scale application thereof in decorative engineering can be effectively promoted.

Description

A solid waste-based white sulphoaluminate cement and its preparation method and application

technical field

The invention belongs to the field of building decoration materials, and relates to a solid waste-based white sulphoaluminate cement and a preparation method and application thereof.

Background technique

The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

At present, white Portland cement accounts for a relatively high proportion in the white cement market, but white Portland cement clinker has high requirements on raw material quality and calcination temperature. The limestone content in the raw meal accounts for more than 80%, and the calcination temperature is relatively ordinary. Portland cement clinker is about 100 ℃ higher than sulphoaluminate cement clinker and more than 200 ℃ higher, and the carbon emission is higher; moreover, white Portland cement generally has the problem of low early strength, which not only makes it In engineering applications, it is easy to crack, easy to efflorescence and high damage rate, which also greatly affects the production and construction efficiency. Therefore, it is urgent to invent a kind of low-carbon environmental protection, early-strength, high-strength white cement to meet the urgent needs of the market.

White sulfoaluminate cement is a hydraulic cementitious material composed of anhydrous calcium sulfoaluminate, dicalcium silicate and calcium sulfate as main minerals. Because of its special mineral composition, the calcination temperature and The demand for calcium carbonate is much lower than that of white Portland cement. It is a low-carbon environmentally friendly cement; and because of its own characteristics such as rapid hardening, early strength, high strength and micro-expansion, it can not only meet the strength of construction It can also greatly improve the production and construction efficiency, so it is an ideal white cement. The inventor found that although white sulphoaluminate cement is an ideal white cement, it has taken up a relatively small proportion in the white cement market since its invention. One of the important reasons for this is that white sulphoaluminate cement is ripe The production of raw materials relies heavily on high-quality raw materials such as bauxite, which leads to high costs; another reason is that the strength of ordinary white sulphoaluminate cement does not increase significantly in the later stage, and even shrinks.

Contents of the invention

In order to solve the deficiencies in the prior art, the object of the present invention is to provide a solid waste-based white sulphoaluminate cement and its preparation method and application. The solid waste-based white sulphoaluminate cement provided by the invention can not only effectively reduce The production cost of white sulphoaluminate cement can also reduce the harm of industrial solid waste to the environment, realize the reduction, recycling and high-value utilization of industrial solid waste, and the prepared solid waste-based white sulphoaluminate The strength of cement increases significantly in the later stage, which can effectively promote its large-scale application in decorative engineering.

In order to achieve the above object, the technical solution of the present invention is:

On the one hand, a kind of solid waste-based white sulphoaluminate cement clinker, the ingredients of the raw material are counted in parts by mass, including: 41-46 parts of aluminum profile electroplating residue, 10-17 parts of white desulfurized gypsum from steel mills, wollastonite 10-13 parts, limestone 29-34 parts.

White cement is a series of cement that requires high cement whiteness. White cement can be used as building decoration materials. At present, the technology of using solid waste to prepare sulphoaluminate cement mainly focuses on the phase composition of sulphoaluminate cement, and selects different solid wastes for batching and calcining to make sulphoaluminate cement. However, solid waste contains a variety of trace elements, such as chromium, manganese, iron, vanadium, nickel, titanium, etc. These trace elements not only affect the performance of sulphoaluminate cement, but also have a strong effect on cement clinker calcination. The dyeing ability can greatly reduce the whiteness of sulphoaluminate cement, so it is difficult to prepare white sulphoaluminate cement from solid waste. At the same time, the preparation of ordinary sulphoaluminate cement needs to use bauxite, while the preparation of white sulphoaluminate cement requires higher purity of bauxite, so the cost is significantly increased. In order to improve the whiteness of solid waste-based sulphoaluminate cement and reduce costs, the present invention selects aluminum profile electroplating residues, white desulfurized gypsum from steel mills, wollastonite, and limestone for batching. Research shows that the solid waste-based White sulphoaluminate cement clinker, and then solid waste-based white sulphoaluminate cement prepared by further compounding white desulfurized gypsum and limestone in steel mills, not only has a higher whiteness than ordinary white sulphoaluminate cement , and the strength increases significantly in the later stage, and the mechanical properties are significantly better than ordinary white sulphoaluminate cement.

On the other hand, a method for preparing the above-mentioned solid waste-based white sulphoaluminate cement clinker comprises uniformly mixing aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone according to the ratio of raw materials, and then calcining, Cool to obtain solid waste-based white sulphoaluminate cement clinker.

In the third aspect, a solid waste-based white sulphoaluminate cement, in parts by mass, comprising: 50-80 parts of the above-mentioned solid waste-based white sulphoaluminate cement clinker, 5-20 parts of white desulfurized gypsum from steel mills , 10-30 parts of limestone.

In order to adjust the mechanical properties of the solid waste-based white sulphoaluminate water while taking into account the whiteness requirements, it is necessary to add white gypsum and limestone. In order to further reduce costs, white desulfurized gypsum from steel mills is used. The study found that the use of white desulfurized gypsum from steel mills has a better effect on adjusting the coagulation and strengthening of solid waste-based white sulphoaluminate cement clinker.

In the fourth aspect, a method for preparing the above-mentioned solid waste-based white sulphoaluminate cement, the solid waste-based white sulphoaluminate cement clinker, white desulfurized gypsum from steel mills, and limestone are mixed uniformly according to the proportion, and then ground and sieved Obtain solid waste-based white sulphoaluminate cement.

In the fifth aspect, an application of the above-mentioned solid waste-based white sulphoaluminate cement in architectural decoration engineering or sculpture products.

The beneficial effects of the present invention are:

The solid waste-based white sulphoaluminate cement prepared by the present invention uses industrial solid waste as the main raw material, which not only effectively reduces the production cost of white sulphoaluminate cement, but also reduces the environmental pollution caused by industrial solid waste. The reduction, recycling and high-value utilization of industrial solid waste are realized; the strength of the solid waste-based white sulphoaluminate cement prepared by the invention is significantly improved in the later stage, which can effectively promote the decorative performance of the white sulphoaluminate cement. large-scale applications in engineering.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

In view of the problems that the existing white sulphoaluminate cement has high cost, no obvious increase in strength in the later stage, and even shrinkage, the present invention proposes a solid waste-based white sulphoaluminate cement and its preparation method and application.

A typical implementation of the present invention provides a solid waste-based white sulphoaluminate cement clinker. The raw material ingredients are calculated in parts by mass, including: 41-46 parts of aluminum profile electroplating residue, white desulfurized gypsum from steel mills 10-17 parts, wollastonite 10-13 parts, limestone 29-34 parts.

The present invention selects aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone for raw material batching. Studies have shown that solid waste-based white sulphoaluminate cement clinker is prepared by using the combination of raw materials, and then by further compounding steel The solid waste-based white sulphoaluminate cement prepared from factory white desulfurized gypsum and limestone not only has a higher whiteness than ordinary white sulphoaluminate cement, but also has a continuous increase in strength in the later stage, and its mechanical properties are significantly better than ordinary white sulphoaluminate cement. Sulphoaluminate cement.

In some embodiments, there are 43.6-45.8 parts of electroplating residue for aluminum profiles, 10.4-16.6 parts of white desulfurized gypsum from steel mills, 10.4-12.5 parts of wollastonite, and 29.4-32.5 parts of limestone. The solid waste-based white sulphoaluminate cement clinker prepared under this ratio is more conducive to improving the whiteness and mechanical properties of solid waste-based white sulphoaluminate cement.

In some embodiments, the sum of the parts by mass of aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone is 100 parts.

Another embodiment of the present invention provides a method for preparing the above-mentioned solid waste-based white sulphoaluminate cement clinker. The electroplating residue of aluminum profiles, white desulfurized gypsum from steel mills, wollastonite and limestone are mixed according to the ratio of raw materials Mix evenly, then calcinate, and cool to obtain solid waste-based white sulphoaluminate cement clinker.

In some embodiments, the homogeneously mixed material is pressed into shape by adding water, and then calcined, and the calcined and cooled clinker block is broken and ground.

In some embodiments, the calcination temperature is 1220-1250°C.

The third embodiment of the present invention provides a solid waste-based white sulphoaluminate cement, which comprises: 50-80 parts of the above-mentioned solid waste-based white sulphoaluminate cement clinker in parts by mass. 5-20 parts of white desulfurized gypsum, 10-30 parts of limestone.

The present invention adopts the white desulfurized gypsum of steel mills, which not only can further reduce the cost, but also has better effect of adjusting coagulation and promoting strength.

In some embodiments, solid waste-based white sulphoaluminate cement clinker is 64.0-76.5 parts, steel plant white desulfurized gypsum is 8.0-13.5 parts, and limestone is 10.0-20.0 parts. The mechanical properties of solid waste-based white sulphoaluminate cement under this ratio are better.

In some embodiments, the specific surface area is not less than 400 m ² /kg.

The fourth embodiment of the present invention provides a method for preparing the above-mentioned solid waste-based white sulphoaluminate cement. The solid waste-based white sulphoaluminate cement clinker, steel mill white desulfurized gypsum, and limestone are mixed according to the proportion Mix evenly, grind and sieve to obtain solid waste-based white sulphoaluminate cement.

The fifth embodiment of the present invention provides an application of the above-mentioned solid waste-based white sulphoaluminate cement in architectural decoration projects or sculpture products.

In order to enable those skilled in the art to understand the technical solution of the present invention more clearly, the technical solution of the present invention will be described in detail below in conjunction with specific examples and comparative examples.

In the following examples, the used aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone all need to be pretreated before use, and the pretreatment steps are crushing, drying and grinding. Among them, the drying temperature is 105°C, and the raw materials need to be dried to constant weight; during grinding, the raw materials need to be ground until all of them pass through a 200-mesh sieve.

In the following examples, the aluminum profile electroplating residue used is a kind of white residue, which is obtained from the acidic electroplating solution that has treated the surface of the aluminum profile, after condensing adjustment, pressure filtration, and drying, and its Al ₂ O ₃ content is between 45 %～55wt%, Fe ₂ O ₃ content is less than 0.8wt%.

In the following examples, the white desulfurized gypsum from steel mills used has a SO ₃ content of 45-50 wt % and a Fe ₂ O ₃ content of less than 0.3 wt %.

In the following examples, the limestone used has a CaO content greater than 55% and a Fe ₂ O ₃ content less than 0.1 wt%.

In the following examples, the wollastonite used has a SiO ₂ content of 45-50 wt % and a Fe ₂ O ₃ content of less than 0.1 wt %.

Example 1

A. Preparation of solid waste-based white sulphoaluminate cement clinker

(1) Raw ingredients

Aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone are selected as raw materials, and the proportions are calculated as follows: 44.5wt% aluminum profile electroplating residue, 10.9wt% white desulfurized gypsum from steel mills, and 12.1wt% wollastonite wt%, limestone 32.5wt%.

(2) Raw material prefabrication

Weigh various raw materials according to the ratio designed in (1), grind them fully, mix them evenly, and then add an appropriate amount of water to press them into

Cylindrical raw cakes were dried at 105°C to constant weight.

(3) Clinker preparation

Put the dried raw cake in (2) into a high-temperature lifting furnace, calcined at 1250°C for 30 minutes, then quickly take it out and cool it to room temperature, then crush and grind the cooled clinker cake until it passes through a 200-mesh sieve , to obtain solid waste-based white sulphoaluminate cement clinker.

B. Preparation of solid waste-based white sulphoaluminate cement

(1) Solid waste-based white sulphoaluminate cement is mainly prepared from cement clinker, setting and strengthening components, and filler components. The cement clinker is solid waste-based white sulphoaluminate cement clinker produced in Part A, the coagulation-adjusting and strengthening-promoting component is steel mill white desulfurized gypsum, and the filling auxiliary material is limestone.

(2) Take each component described in (1) according to the following ratio, wherein solid waste-based white sulphoaluminate cement clinker 72wt%, steel factory white desulfurized gypsum 8wt%, limestone 20wt%, then the above-mentioned each The components are mixed and ground until the specific surface area reaches 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 2

B. Preparation of solid waste-based white sulphoaluminate cement

(1) The raw materials for preparing solid waste-based white sulphoaluminate cement are exactly the same as in Example 1, which are respectively the solid waste-based white sulphoaluminate cement clinker and the steel mill white sulphoaluminate cement clinker prepared in Part A of Example 1. Desulfurization gypsum and limestone.

(2) Take each component described in (1) according to the following weight percentages, wherein solid waste-based white sulphoaluminate cement clinker 68wt%, steel factory white desulfurized gypsum 12wt%, limestone 20wt%, then the above-mentioned The components are mixed and ground until the specific surface area reaches 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 3

B. Preparation of solid waste-based white sulphoaluminate cement

(2) Take each component described in (1) according to the following weight percentages, wherein solid waste-based white sulphoaluminate cement clinker 64wt%, steel factory white desulfurized gypsum 16wt%, limestone 20wt%, then the above-mentioned The components are mixed and ground until the specific surface area reaches 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 4

B. Preparation of solid waste-based white sulphoaluminate cement

(2) Take each component described in (1) according to the following weight percentages, wherein solid waste base white sulphoaluminate cement clinker 76.5wt%, steel factory white desulfurized gypsum 13.5wt%, limestone 10wt%, then The above-mentioned components were mixed and ground until the specific surface area reached 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 5

B. Preparation of solid waste-based white sulphoaluminate cement

(2) Take each component described in (1) according to the following weight percentages, wherein solid waste base white sulphoaluminate cement clinker 59.5wt%, steel factory white desulfurized gypsum 10.5wt%, limestone 30wt%, then The above-mentioned components were mixed and ground until the specific surface area reached 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 6

A. Preparation of solid waste-based white sulphoaluminate cement clinker

(1) Raw ingredients

Aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone are selected as raw materials, and the proportions are calculated as follows: 45.8wt% aluminum profile electroplating residue, 10.4wt% white desulfurized gypsum from steel mills, and 12.5% wollastonite wt%, limestone 31.3wt%.

(2) Raw material prefabrication

Cylindrical raw cakes were dried at 105°C to constant weight.

(3) Clinker preparation

B. Preparation of solid waste-based white sulphoaluminate cement

(2) take by weighing each component described in (1) according to the following ratio, wherein solid waste base white sulphoaluminate cement clinker 76.5wt%, steel factory white desulfurized gypsum 13.5wt%, limestone 10wt%, then The above-mentioned components were mixed and ground until the specific surface area reached 450m ² /kg to obtain solid waste-based white sulphoaluminate cement.

Example 7

A. Preparation of solid waste-based white sulphoaluminate cement clinker

(1) Raw ingredients

Aluminum profile electroplating residue, steel mill white desulfurized gypsum, wollastonite and limestone are selected as raw materials, and the proportions are calculated as follows: aluminum profile electroplating residue 43.6wt%, steel mill white desulfurized gypsum 16.6wt%, wollastonite 10.4 wt%, limestone 29.4wt%.

(2) Raw material prefabrication

Cylindrical raw cakes were dried at 105°C to constant weight.

(3) Clinker preparation

B. Preparation of solid waste-based white sulphoaluminate cement

Comparative example 1

Preparation of Ordinary White Portland Cement

(1) Ordinary white Portland cement is mainly prepared from cement clinker, setting and strengthening components, and filling auxiliary components. Among them, the cement clinker is commercially available ordinary white Portland cement clinker, the coagulation-adjusting and strengthening-promoting component is white desulfurized gypsum from steel mills, and the filling auxiliary material is limestone.

(2) Weigh each component described in (1) according to the following ratio, wherein commercially available ordinary white Portland cement clinker 76.5wt%, steel factory white desulfurized gypsum 13.5wt%, limestone 10wt%, then the above-mentioned The components are mixed and ground until the specific surface area reaches 450m ² /kg to obtain ordinary white Portland cement.

Comparative example 2

Preparation of Ordinary Sulphoaluminate Cement

(1) Ordinary sulphoaluminate cement is mainly prepared from cement clinker, setting and strengthening components, and filler components. Among them, the cement clinker is commercially available common sulphoaluminate cement clinker, the coagulation-adjusting and strengthening-promoting components are steel factory white desulfurized gypsum, and the filling auxiliary material is limestone.

(2) Take each component described in (1) according to the following proportions, wherein commercially available ordinary sulphoaluminate cement clinker is 76.5wt%, steel factory white desulfurized gypsum 13.5wt%, limestone 10wt%, and then the above-mentioned The components are mixed and ground until the specific surface area reaches 450m ² /kg to obtain ordinary sulphoaluminate cement.

Comparative example 3

Preparation of Ordinary White Sulphoaluminate Cement

(1) Ordinary white sulphoaluminate cement is mainly prepared from cement clinker, setting and strengthening components, and filling auxiliary components. Among them, the cement clinker is commercially available ordinary white sulphoaluminate cement clinker, the coagulation-adjusting and strengthening-promoting component is steel factory white desulfurized gypsum, and the filling auxiliary material is limestone.

(2) Take by weighing each component described in (1) according to the following ratio, wherein commercially available common white sulphoaluminate cement clinker 76.5wt%, white desulfurized gypsum of steel factory 13.5wt%, limestone 10wt%, then The above-mentioned components were mixed and ground until the specific surface area reached 450m ² /kg to obtain ordinary white sulphoaluminate cement.

Comparative example 4

Preparation of Ordinary White Sulphoaluminate Cement

(1) Ordinary white sulphoaluminate cement is mainly composed of cement clinker and gypsum. Wherein the cement clinker is commercially available common white sulphoaluminate cement clinker, and the gypsum is commercially available anhydrite.

(2) Weigh the components described in (1) according to the following proportions, wherein the commercially available ordinary white sulphoaluminate cement clinker is 80wt%, and the commercially available anhydrite is 20wt%, and then the above-mentioned components are mixed And grind until the specific surface area reaches 450m ² /kg, and make ordinary white sulphoaluminate cement.

In order to further test the whiteness and the mechanical properties of the solid waste-based white sulphoaluminate cement prepared by the present invention, the following experiments were carried out:

1. Sample preparation

The solid waste-based white sulphoaluminate cement prepared in the above examples was sealed and dried. At the same time, commercially available ordinary sulphoaluminate cement clinker, commercially available white sulphoaluminate cement clinker, and commercially available ordinary white Portland cement clinker were used as the main raw materials for comparison.

2. Whiteness and mechanical properties test

2.1 The test of cement whiteness in each embodiment and comparative example is carried out according to the method specified in GB/T 5950-2008 "Building Materials and Non-metallic Mineral Whiteness Measurement Method".

2.2 The mechanical performance test of the cement of each embodiment and comparative example is carried out as follows: the water and the cement are mixed evenly in the slurry mixer with a water-to-binder ratio of 0.33, and then poured into a six-unit mold of 20mm×20mm×20mm Medium molding. After molding, put the test mold into a standard curing box (temperature 20±1°C, humidity 95±1%) for curing, and demould after 6 hours. After demoulding, put the test block in water for curing until the test age, and then use the pressure testing machine to test the compressive strength.

The whiteness and compressive strength test results of each embodiment and comparative example cement are shown in Table 1.

The compressive strength and whiteness of the cement prepared by each embodiment and comparative example of table 1

It can be seen from Table 1 that,

(1) Adopt the method described in the present invention, take aluminum profile electroplating residue, white desulfurization gypsum of steel factory, wollastonite, limestone as raw material, make solid waste base white sulphoaluminate cement clinker, by further compounding 10- 20wt% steel mill white desulfurized gypsum and 10-30wt% limestone make solid waste-based white sulphoaluminate cement (Example 1-Example 7), and find that by testing and analyzing its whiteness and compressive strength respectively : one, the whiteness of the prepared solid waste base white sulphoaluminate cement has all reached more than 83%, which is higher than ordinary white portland cement (comparative example 1) and ordinary white sulphoaluminate cement (to Ratio 3) whiteness; Second, the prepared solid waste-based white sulphoaluminate cement not only has rapid early strength growth, but also has a 3D compressive strength exceeding 60MPa, which has the characteristics of early strength and rapid hardening, and the later Intensity continues to increase, better than ordinary white sulphoaluminate cement (comparative example 3 and comparative example 4), and the compressive strength of each age is much higher than ordinary white portland cement (comparative example 1), illustrating that the present invention The method for preparing solid waste-based white sulphoaluminate cement is feasible. Third, it can be seen from the data of Comparative Example 3 and Comparative Example 4 that the problem of insignificant strength improvement in the later stage (the difference between the compressive strength of 28d clean slurry and 3d clean slurry) can be adjusted by adding limestone, but the enhancement effect Not so obvious. By comparing Example 3 with Example 4, it can be seen that the solid waste-based white sulphoaluminate cement clinker provided by the present invention can significantly increase the later strength (compressive strength of 28d clean paste). Therefore, through the combination of Comparative Examples 3 and 4 and Example 4, it can be shown that the solid waste-based white sulphoaluminate cement clinker provided by the present invention has a synergistic effect with limestone, thereby significantly increasing the strength in the later stage, thereby effectively improving the strength in the later stage. Obvious problem.

(2) The solid waste-based white sulphoaluminate cement prepared by the method of the present invention has more than 70% of its raw materials as industrial solid waste, which illustrates that the solid waste-based white sulphoaluminate cement is prepared by the method of the present invention It can not only effectively reduce the production cost of white sulphoaluminate cement, but also reduce the environmental pollution caused by industrial solid waste, and realize the high-value utilization of industrial solid waste.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A solid waste-based white sulphoaluminate cement clinker is characterized in that raw material ingredients are calculated in parts by mass, including: 41-46 parts of aluminum profile electroplating residue, 10-17 parts of white desulfurized gypsum from steel mills, silica fume 10-13 parts of limestone, 29-34 parts of limestone.
The solid waste-based white sulphoaluminate cement clinker according to claim 1 is characterized in that 43.6-45.8 parts of aluminum profile electroplating residue, 10.4-16.6 parts of white desulfurized gypsum from steel mills, 10.4-12.5 parts of wollastonite, 29.4 to 32.5 parts of limestone.
The solid waste-based white sulphoaluminate cement clinker according to claim 1 is characterized in that the sum of the mass parts of aluminum profile electroplating residue, steel mill white desulfurized gypsum, wollastonite and limestone is 100 parts.
A method for preparing solid waste-based white sulphoaluminate cement clinker according to any one of claims 1 to 3, characterized in that the aluminum profile electroplating residue, white desulfurized gypsum from steel mills, wollastonite and limestone are mixed as raw materials Proportioning and mixing are uniform, then calcined and cooled to obtain solid waste-based white sulphoaluminate cement clinker.
The preparation method of solid waste-based white sulphoaluminate cement clinker as claimed in claim 4 is characterized in that, the uniformly mixed material is added with water and pressed into shape, then calcined, and the calcined and cooled clinker block is broken and powdered grind.
The method for preparing solid waste-based white sulphoaluminate cement clinker according to claim 4, characterized in that the calcination temperature is 1220-1250°C.
A solid waste-based white sulphoaluminate cement, characterized in that, in terms of parts by mass, it comprises: 50-80 parts of the solid waste-based white sulphoaluminate cement clinker according to any one of claims 1-3, 5-20 parts of white desulfurized gypsum in steel mills, 10-30 parts of limestone.
The solid waste-based white sulphoaluminate cement according to claim 7 is characterized in that 64.0-76.5 parts of solid waste-based white sulphoaluminate cement clinker, 8.0-13.5 parts of white desulfurized gypsum from steel mills, and 10.0-13.5 parts of limestone 20.0 copies;

Or, the specific surface area is not less than 400m 2 /kg.
A method for preparing solid waste-based white sulphoaluminate cement according to claim 7 or 8, wherein the solid waste-based white sulphoaluminate cement clinker, steel mill white desulfurized gypsum, and limestone are mixed according to the proportioning ratio Mix evenly, grind and sieve to obtain solid waste-based white sulphoaluminate cement.
An application of the solid waste-based white sulphoaluminate cement described in claim 7 or 8 in building decoration engineering or sculpture products.