A method for preparing porous structure materials by mixing and roasting
A porous structure and roasting technology, which is applied in the field of preparing porous structure materials through mixed roasting, can solve the problems of ignoring the use value, occupying land resources, polluting the environment, etc., and achieve the effect of enriching the particle pore structure, increasing the reaction rate, and enhancing the particle strength
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Embodiment 1
[0042] In this embodiment, a porous structure material with pyrrhotite as the main phase is prepared according to the following steps:
[0043] Select ores with a pyrite content greater than 90%, crush and sieve to obtain 0.5-0.8mm pyrite particles;
[0044] Select limonite ore with a goethite content greater than 85%, crush and sieve to obtain limonite particles of 3 to 3.5 mm in size;
[0045] Above-mentioned pyrite particle and limonite particle are mixed according to the ratio of mass percentage 2:1;
[0046] Add the above mixed material into the rotary kiln, roast at 700°C for 10min in an oxygen-free atmosphere, and naturally cool to room temperature in an oxygen-free atmosphere to obtain a porous structure material composed of pyrrhotite; wherein, the particle size range is 3 The limonite particles with a particle size of ~3.5 mm undergo phase transformation to form a porous structure material with a particle size range of 3 to 3.5 mm, with pyrrhotite as the main phase,...
Embodiment 2
[0051] The present embodiment prepares pyrrhotite porous structure material according to the following steps:
[0052] Select ores with a pyrite content greater than 90%, crush and sieve to obtain 0.5-0.8mm pyrite particles;
[0053] Select limonite ore with goethite content greater than 90%, crush and sieve to obtain limonite particles of 0.5-0.8mm;
[0054] Above-mentioned pyrite particle and limonite particle are mixed according to the ratio of mass percent 2.5:1;
[0055] Add the above mixed material into the rotary kiln, bake at 700°C for 10min under protective atmosphere, and cool naturally to room temperature under protective atmosphere to obtain the target product.
[0056] image 3 It is the XRD pattern of the obtained product, as can be seen from the figure that the product is pyrrhotite as the main phase;
[0057] Figure 4 It is the field emission scanning electron microscope image of the obtained product, and it can be seen from the figure that the product has...
Embodiment 3
[0060] The present embodiment prepares pyrrhotite porous structure material according to the following steps:
[0061] (1) Select industrial flotation sulfur concentrate powder with a pyrite content greater than 90%, mix 2kg of sulfur concentrate powder, 40g of straw powder with a particle size of less than 1.0mm and 80g of sodium silicate binder to obtain mixture A ;
[0062] (2) Limonite ore is crushed and sieved to obtain limonite powder with a particle size of less than 0.15 mm, and 1 kg of limonite particles, 15 g of straw powder with a particle size of less than 1.0 mm and 40 g of sodium silicate binder are mixed uniformly, Obtain mixture B;
[0063] (3) First, add the mixture A into the ball forming plate, start the ball forming plate, make the mixture A roll in the ball forming plate at a speed of 40r / min, spray water to make the surface of the mixture A in the ball forming plate wet , into balls until the particle size is 3-4mm, and then gradually add the mixture B ...
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Abstract
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