阅读说明：本技术 利用自然原料制备矿渣微晶玻璃的方法及其所制备的矿渣微晶玻璃 (Method for preparing slag glass ceramics by using natural raw materials and slag glass ceramics prepared by same ) 是由 郭艳玲 王欣 张捷宇 陈亚旭 高宁 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种利用自然原料制备矿渣微晶玻璃的方法及其所制备的矿渣微晶玻璃,能减少固废资源化环节降低能耗,本发明利用自然原料直接制备所需金属和晶相可供选择的矿渣微晶玻璃的方法。其中原料按照质量百分比包括红土矿64-91份、海砂矿0-24份、碳粉8-11份。以红土矿和海砂矿为主要原料在经过1100-1200℃还原和1450-1500℃熔分后对渣液进行控温冷却,能获得多种不同物相组成的高性能的矿渣微晶玻璃。本发明减少了制备矿渣微晶玻璃的方法中间环节能够有效的降低能耗,制备的矿渣微晶玻璃物相可供选择能够在多种场合进行应用,同时其生产成本低廉,操作简单。本发明原料的配比关系和制备工艺可以推广使用。(The invention discloses a method for preparing slag glass ceramics by utilizing natural raw materials and the prepared slag glass ceramics, which can reduce the link of solid waste reclamation and reduce energy consumption. Wherein the raw materials comprise 64-91 parts of laterite, 0-24 parts of placer and 8-11 parts of carbon powder according to mass percentage. Laterite and sea sand ore are used as main raw materials, temperature control cooling is carried out on slag liquid after 1100-1200 ℃ reduction and 1450-1500 ℃ melting separation, and high-performance slag glass ceramics consisting of various phases can be obtained. The invention reduces the intermediate links of the method for preparing the slag microcrystalline glass, can effectively reduce energy consumption, can select the prepared slag microcrystalline glass and can be applied to various occasions, and simultaneously has low production cost and simple operation. The proportioning relation and the preparation process of the raw materials can be popularized and used.)

1. A method for preparing slag glass ceramics by using natural raw materials is characterized by comprising the following steps:

a. preparing ingredients: laterite, placer and carbon powder are used as main raw materials, ingredients are prepared according to the mass percentage of the raw material components, and then the ingredients are mixed to obtain a mixture for later use; wherein the laterite ore: 64-91%; the sea placer: not more than 25%; the carbon powder: 8-11%;

b. placing the mixture prepared in the step a in a high-temperature furnace, carrying out reduction reaction for at least 1h at 1100-;

c. and c, cooling the molten slag liquid prepared in the step b to obtain a slag glass-ceramic product.

2. The method for producing slag glass-ceramics according to claim 1, wherein: in the step c, the process of cooling the molten slag liquid comprises a temperature control section process and a non-temperature control section process; wherein, in the process of the temperature control section, the temperature control cooling is divided into two sections, the temperature control cooling is carried out on the molten slag liquid in sections at 1500-1000 ℃ and 1000-500 ℃ in sequence, and the temperature control rate is 1-3 ℃/min or the temperature control rate of natural cooling; and in the process of the non-temperature control section, cooling along with the furnace is carried out by adopting a natural cooling mode.

3. The method for producing slag glass-ceramics according to claim 2, wherein: in the step c, TiO in the sea placer is utilized₂The slag microcrystalline glass is used as a nucleating agent for slag liquid crystallization, and the selection and the regulation of the main crystal phase of the slag microcrystalline glass are realized in a sectional temperature control cooling mode.

4. A glass-ceramic slag produced by the method for producing a glass-ceramic slag using natural raw materials according to claim 1, wherein the glass-ceramic slag comprises 15 to 17 mass% of MgO and 14 to 17 mass% of Al₂O₃、59-65％SiO₂0-6% of TiO₂And 0-1% of other metal oxides.

5. The slag glass-ceramic according to claim 4, wherein: the other metal oxide is Fe₂O₃、NiO、Cr₂O₃Any one or any plurality of metal oxides of (a).

Technical Field

The invention relates to a method for preparing glass by using natural raw materials and a product thereof, in particular to a method for directly obtaining metal and slag glass ceramics by using raw ore smelting and a product thereof, which are applied to the technical field of low energy consumption and low cost utilization of natural resources.

Background

The metallurgical industry generates a large amount of solid waste slag every year. The existing solid waste utilization modes comprise road paving, cement preparation and the like, but most of solid wastes are still piled in the open air, which not only wastes land resources, but also has certain influence on the surrounding environment.

The slag contains a large amount of gangue components which are important raw materials for preparing the glass ceramics. The slag microcrystalline glass is a microcrystalline material prepared by taking slag as a main raw material and adding a certain amount of other auxiliary raw materials through the processes of proportioning, melting, forming, crystallizing and the like. The slag glass ceramics have a great number of advantages: 1) the slag glass ceramics can replace clay and stone, can protect the environment and can change waste into valuable at the same time; 2) the slag microcrystalline glass has the advantages that the main raw material is slag, so that the cost is low, the quantity is large, and the slag microcrystalline glass is easy to obtain; 3) the slag glass ceramics has strong solidifying effect on heavy metal ions, is a green material and can be widely applied.

The microcrystalline glass prepared by utilizing the slag can be roughly divided into two parts, namely, the slag is produced by smelting raw ores; secondly, preparing the slag glass ceramics by recycling slag. The two parts need to heat the raw materials, and the repeated heating and cooling process is actually a waste of energy, which becomes a technical problem to be solved urgently.

Disclosure of Invention

In order to solve the problems of the prior art, the invention aims to overcome the defects of the prior art and provide the method for preparing the slag microcrystalline glass by utilizing natural raw materials and the slag microcrystalline glass prepared by the method, which can reduce the intermediate links for preparing the slag microcrystalline glass and realize low energy consumption and low costAnd (4) slag recycling. In order to promote slag liquid crystallization, the invention selects the sea placer as the additive and introduces TiO in the sea placer₂The slag microcrystalline glass is used as a nucleating agent for slag liquid crystallization, and the selection of the main crystal phase of the slag microcrystalline glass is realized by a sectional temperature control cooling mode.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a method for preparing slag glass ceramics by using natural raw materials comprises the following steps:

a. preparing ingredients: laterite, placer and carbon powder are used as main raw materials, ingredients are prepared according to the mass percentage of the raw material components, and then the ingredients are mixed to obtain a mixture for later use; wherein the laterite ore: 64-91%; the sea placer: not more than 25%; the carbon powder: 8-11%;

b. placing the mixture prepared in the step a in a high-temperature furnace, carrying out reduction reaction for at least 1h at 1100-;

c. and c, cooling the molten slag liquid prepared in the step b to obtain a slag glass-ceramic product.

As a preferred technical scheme of the present invention, in the step c, the process of cooling the molten slag liquid includes a temperature control section process and a non-temperature control section process; wherein, in the process of the temperature control section, the temperature control cooling is divided into two sections, the temperature control cooling is carried out on the molten slag liquid in sections at 1500-1000 ℃ and 1000-500 ℃ in sequence, and the temperature control rate is 1-3 ℃/min or the temperature control rate of natural cooling; and in the process of the non-temperature control section, cooling along with the furnace is carried out by adopting a natural cooling mode.

As a preferable technical scheme of the invention, in the step c, TiO in the sea placer is utilized₂The slag microcrystalline glass is used as a nucleating agent for slag liquid crystallization, and the selection and the regulation of the main crystal phase of the slag microcrystalline glass are realized in a sectional temperature control cooling mode.

The slag glass ceramics is prepared by the method for preparing the slag glass ceramics by utilizing natural raw materials, and the components of the slag glass ceramics are 15-17％MgO、14-17％Al₂O₃、59-65％SiO₂0-6% of TiO₂And 0-1% of other metal oxides.

As a preferable embodiment of the present invention, the other metal oxide in the microcrystalline glass-slag component is Fe₂O₃、NiO、Cr₂O₃Any one or any plurality of metal oxides of (a).

Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:

1. the slag glass ceramics is directly prepared from raw ores, the raw materials of the slag glass ceramics are slag, the waste is changed into valuable, and the land problem and the environmental problem of solid waste stacking are solved;

2. according to the invention, the slag is subjected to crystallization and nucleation treatment by using the waste heat of ore smelting, so that the steps of melting the slag and the like are reduced, and the energy consumption and the cost are reduced;

3. the utilization rate of the waste residue is up to 100 percent;

4. the slag glass ceramics with different phase compositions can be obtained by controlling the cooling condition of the slag liquid, and has the characteristic of wide application range; the method is simple and easy to implement, low in cost and suitable for popularization and application.

Detailed Description

The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below: