Terracotta brick and preparation method thereof
A technology of clay bricks and clay, applied in the production of clay products, other household utensils, ceramic materials, etc., can solve the problems of cultivated land, farmland, vegetation damage, low calorific value that cannot be directly used, and clay bricks cannot be obtained, etc., to achieve sintering time Effect of shortening, low production cost and weight reduction
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Embodiment 1
[0063] The raw material of the clay brick is composed of tailings and clay; the mass percentage of the tailings is 70%, and the mass percentage of the clay is 30%; The mass percentage of each component in the mine is: SiO 2 62%, Al 2 o3 17%, Fe 2 o 3 5%, CaO 2%, MgO 2%, and the rest are other elements; the plasticity index of the tailings is 12, and the calorific value is 1.8MJ / kg. Tailings particle size < 0.045mm; clay particle size < 2mm.
[0064] The clay brick preparation method is as follows:
[0065] Step 1: Transport the tailings to the slime dryer to dry until the moisture content is 15-18%;
[0066] Step 2: Sieving the clay through a drum sieve to obtain clay with a particle size of <2mm;
[0067] Step 3: Mix the clay obtained in step 2 with the tailings obtained in step 1 in proportion, and then transport them to two continuous first and second mixing systems of SJJ280×36 for stirring and rolling; the stirring speed of the first mixing system is 100-300r / min, ...
Embodiment 2
[0072] The raw material of the clay brick is composed of tailings and clay; the mass percentage of the tailings is 80%, and the mass percentage of the clay is 20%; The mass percentage of each component in the mine is: SiO 2 66%, Al 2 o 3 16%, Fe 2 o 3 5%, CaO 1%, MgO 1%, and the rest are other elements; the plasticity index of the tailings is 16, and the calorific value is 2.0 MJ / kg. Tailings particle size <0.045mm; clay particle size <2mm.
[0073] The clay brick preparation method is as follows:
[0074] Step 1: Transport the tailings to the slime dryer to dry until the moisture content is 15-18%;
[0075] Step 2: Sieving the clay through a drum sieve to obtain clay with a particle size of <2mm;
[0076] Step 3: Mix the clay obtained in step 2 with the tailings obtained in step 1 in proportion, and then transport them to two continuous first and second mixing systems of SJJ280×36 for stirring and rolling; the stirring speed of the first mixing system is 100-300r / min,...
Embodiment 3
[0081] The clay brick raw material is composed of tailings and clay; the mass percentage of the tailings is 90%, and the mass percentage of the clay is 10%; the tailings are directly obtained from coal slime after being re-sorted by a sorting column, and the tailings are The mass percentage of each component in the mine is: SiO 2 76%, Al 2 o 3 15%, Fe 2 o 3 2%, CaO 0.5%, MgO 0.5%, and the rest are other elements; the plasticity index of the tailings is 18, and the calorific value is 2.5MJ / kg. Tailings particle size <0.045mm; clay particle size <2mm.
[0082] The clay brick preparation method is as follows:
[0083] Step 1: Transport the tailings to the slime dryer to dry until the moisture content is 15-18%;
[0084] Step 2: Sieving the clay through a drum sieve to obtain clay with a particle size of <2mm;
[0085] Step 3: Mix the clay obtained in step 2 with the tailings obtained in step 1 in proportion, and then transport them to two continuous first and second mixing...
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