CN101121612A - Method for preparing glaze self-releasing ceramic material by red mud and red sandstone - Google Patents

Abstract

The present invention discloses a method for preparing self glaze ceramic material; the molar percent of the raw material is that: 15-50 percent of red soil; 40-80 percent of red sandstone; 3-10 percent of molding material; the detailed steps are that: (1) the red soil and the red sandstone are put into a ball grilling tank for grilling; (2) the product obtained in step (1) is added with the molding material and then to be mixed in the ball grilling tank for grilling; (3) the product obtained in step (2) is taken with molding or pressed mode to form the mold and to become the blank body; (4) the blank body obtained in step (3) is baked for 0.5-3 hours under the temperature of 900 Celsius system -1350 Celsius system, and then to be cooled to the room temperature naturally to become the finished product. The finished product of the glaze level in the present invention is plump, smooth, bright and clear; the ceramic process degree from the blank body is much better; the raw material for the product is abundant; the cost is low; the technical process is simple; the advantages are good for solving the synthesized utilization problem for the red soil as well as enhancing the utilization ratio and utilization value for the red sandstone.

Description

Utilize red mud and Red Sandstone to prepare the method for glaze self-releasing ceramic material

Technical field

The present invention relates to the ceramic technology field, particularly a kind of method of utilizing red mud and Red Sandstone to prepare glaze self-releasing ceramic material.

Background technology

Red mud is to utilize bauxite to refine the solid, powdery waste that is produced in the alumina process.Along with the aluminium industrial expansion, at present the red mud accumulating amount in whole world every year constantly increases.The annual emissions of China's red mud is more than 4,000,000 tons.A large amount of red muds are not utilized effectively, and cause significant damage to environment, perplex the aluminium industrial expansion yet, and therefore, it is a problem demanding prompt solution for a long time that red mud effectively utilizes always.

Red Sandstone is distributed more widely in "Danxia" landform area, China south China, reserves are bigger.At present, Red Sandstone is mainly used to as roadbed material.Red Sandstone voidage height, natural intensity is low, meets the water electrode easy disintegrating, and intensity is softening, brings many difficult problems to road construction work.Therefore, the utilization ratio of Red Sandstone is lower.In addition, often there is the Red Sandstone stock ground of accumulation in the road project roadside, and is in need of immediate treatment.Red Sandstone is used for preparing glaze self-releasing ceramic material, must yet there are no report at home.

The base substrate that does not apply glaze is carried out sintering, and the surface of burning till the back sample generates glaze shape glass state material, and promptly base substrate is released glaze voluntarily in sintering process, and this phenomenon can be described as from releasing the glaze phenomenon.Stupalith with this function is called glaze self-releasing ceramic material.Glaze self-releasing ceramic material, existing both at home and abroad report.Also there has been the patent of relevant glaze self-releasing ceramic technology of preparing in China.But because batching is complicated, technological process is difficult to control, the glaze self-releasing ceramic material that does not have industrialization to produce so far.

Summary of the invention

The present invention is directed to above problem, providing a kind of is main raw material with red mud, Red Sandstone, adds the method that softening agent (one or more in clay, all kinds of kaolin or the artificial softening agent) prepares glaze self-releasing ceramic material.

Raw materials quality per-cent is: red mud 15-50%, Red Sandstone 40-80%, softening agent 3-10%.

Concrete steps are:

(1) respectively red mud and Red Sandstone are put into the ball grinder ball milling;

(2) (1) gained material is added softening agent and put into ball grinder ball milling together;

(3) (2) gained material is adopted plastic molding or compression moulding, make base substrate;

(4) with (3) base substrate 900 ℃-1350 ℃ sintering 0.5-3 hour, naturally cool to room temperature, make finished product.

Finished product of the present invention is carried out the X-ray energy spectrum analysis, and the Fe of demonstration finished surface, the content of Ti element are far above base substrate inside.So the mechanism that the glaze layer of glaze self-releasing ceramic material of the present invention forms is:

Contain the higher relatively Fe of content in the red mud ₂O ₃, TiO ₂Deng the lower material of fusing point, in sintering process, the material that fusing point is lower migrates to billet surface, forms the higher melt of viscosity on the surface, and in the process of cooling, melt forms glass state material, and billet surface is formed from releasing the glaze layer, obtains from the stupalith of releasing glaze.

Characteristics of the present invention:

(1) be that main raw material has prepared glaze self-releasing ceramic material with red mud and Red Sandstone, raw material sources are extensive, and cost is extremely low, helps solving the problem of complex utilization of red mud, improve the utilization ratio and the utility value of Red Sandstone.

(2) technological process is simple, and is more easy to control, and production cost is low, can promote the industrialization process of glaze self-releasing ceramic material.

Embodiment

Embodiment:

Raw materials quality per-cent is red mud (adopting in Pingguo Aluminium Industry Corp) 28.5%, Red Sandstone 66.5%, dimension sieve mud (kaolinic a kind of) 5%.

(1) respectively red mud and Red Sandstone were put into the ball grinder ball milling 24 hours.

(2) (1) gained material is added dimension sieve mud and put into ball grinder, ball mill mixing 2 hours.

(3) (2) gained material is pressed 1: 5.25 mixing of water-solid ratio, puts into the mould that diameter is 30mm, at the 10MP forming under the pressure.

(4) with (3) base substrate put into the cabinet-type electric furnace sintering, 1200 ℃ of firing temperatures insulation 1 hour naturally cools to room temperature then, has both obtained finished product.

This finished product is a sorrel from releasing the glaze layer, and is smooth bright, full plump.The finished product water-intake rate is 0.006%, and hardness (Vickers' hardness) is 652, and ultimate compression strength is 1.3MPa.

Claims (2)

1. a method of utilizing red mud and Red Sandstone to prepare glaze self-releasing ceramic material is characterized in that raw materials quality per-cent is: red mud 15-50%, Red Sandstone 40-80%, softening agent 3-10%;

Concrete steps are:

(1) respectively red mud and Red Sandstone are put into the ball grinder ball milling;

(2) (1) gained material is added softening agent and put into ball grinder ball milling together;

(3) (2) gained material is adopted plastic molding or compression moulding, make base substrate;

(4) with (3) base substrate 900 ℃-1350 ℃ sintering 0.5-3 hour, naturally cool to room temperature, make finished product.

2. the method for preparing glaze self-releasing ceramic material according to claim 1 is characterized in that described softening agent is one or more in clay, all kinds of kaolin or the artificial softening agent.