PELLETIZED PRODUCTS AND ASSOCIATED SYSTEMS, DEVICES, AND METHODS
Production systems and methods for producing pellets or pellet products, which can be used, e.g., in an electric arc furnace (EAF) to produce metal alloys, are disclosed herein. In some embodiments, a method for forming coke pellets includes (i) blending biomass with a set of materials to form an input blend, (ii) preconditioning the input blend by hydrating the input blend to generate a first plurality of particles, (iii) charging the first plurality of particles into an oven to produce a second plurality of particles via pyrolysis, (iv) post-conditioning the second plurality of particles to produce a third plurality of particles by exposing the second plurality of particles to at least one of an amphipathic binder, a hydrophobic binder, or a hydrophilic binder, and (v) physically altering the third plurality of particles to form coke pellets. The biomass can have a first volatility and the set of materials can have a second volatility lower than the first volatility.
1 . A composition, comprising:
a plurality of coke pellets, wherein the coke pellets comprise (i) biomass having a first volatile matter percentage, (ii) a set of materials having a second volatile matter percentage lower than the first volatile matter percentage, and (iii) a binder,
wherein the coke pellets have a third volatile matter percentage less than 15%.
2 . The composition of claim 1 , wherein the third volatile matter percentage is less than 6%.
3 . The composition of claim 1 , wherein the first volatile matter percentage is between 20-80%, and wherein the second volatile matter percentage is between 1-10%.
4 . The composition of claim 1 , wherein the coke pellets have a friability such that, when broken apart, each coke pellet produces a plurality of pieces that (i) each comprise at least 10% of a starting weight of the coke pellet, and (ii) together comprise at least 50% of the starting weight of the coke pellet.
5 . The composition of claim 1 , wherein the coke pellets, when broken apart, produce less than 1% airborne particles by weight.
6 . The composition of claim 1 , wherein the coke pellets have a moisture content of less than 3%.
7 . The composition of claim 1 , wherein the coke pellets have a strength of at least 10 lbf.
8 . The composition of claim 1 , wherein the coke pellets have a density of at least 1.5 g/cm 3 .
9 . The composition of claim 1 , wherein the coke pellets have a total ash content between 3-15%.
10 . The composition of claim 1 , wherein the coke pellets have a sulfur content less than 1%.
11 . A method for forming coke pellets, the method comprising:
hydrating biomass to generate a first plurality of particles;
charging the first plurality of particles into an oven to produce a second plurality of particles via pyrolysis;
exposing the second plurality of particles to at least one of an amphipathic binder, a hydrophobic binder, or a hydrophilic binder to produce a third plurality of particles; and
physically altering the third plurality of particles to form coke pellets, wherein the coke pellets have a volatile matter percentage less than 15%.
12 . The method of claim 11 , wherein the method does not include blending the biomass with a set of materials having a lower volatility than the biomass.
13 . The method of claim 11 , wherein the biomass has a second volatile matter percentage less than 15%.
14 . The method of claim 11 , wherein the third volatile matter percentage is less than 6%.
15 . The method of claim 11 , further comprising adding a hydrophobic material to the first, second, or third plurality of particles.
16 . A method for forming coke pellets, the method comprising:
blending biomass with a set of materials to form an input blend, wherein the biomass has a first volatility and the set of materials has a second volatility lower than the first volatility;
preconditioning the input blend by hydrating the input blend to generate a first plurality of particles;
charging the first plurality of particles into an oven to produce a second plurality of particles via pyrolysis;
post-conditioning the second plurality of particles to produce a third plurality of particles by exposing the second plurality of particles to at least one of an amphipathic binder, a hydrophobic binder, or a hydrophilic binder; and
physically altering the third plurality of particles to form coke pellets.
17 . The method of claim 16 , further comprising:
obtaining a biomass volatile matter (VM) amount and a biomass VM release rate parameter of the biomass;
obtaining a second VM amount and second VM release rate parameter assigned to the set of materials;
obtaining a target VM amount associated with a target pellet of the coke pellets;
determining a set of oven parameters based at least in part on the target VM amount; and
determining a material ratio indicating a ratio of an amount of the set of materials to an amount of the biomass based at least in part on the biomass VM amount, the biomass VM release rate parameter, the second VM amount, the second VM release rate parameter, and the set of oven parameters, wherein blending the biomass with the set of materials comprises blending the biomass with the set of materials based at least in part on the material ratio.
18 . The method of claim 17 , wherein determining the material ratio comprises:
obtaining a target ash fusion temperature;
obtaining a biomass ash fusion temperature; and
obtaining a second ash fusion temperature of the set of materials,
wherein determining the material ratio comprises predicting a candidate ash fusion temperature using an ash fusion prediction model based at least in part on the biomass ash fusion temperature, the second ash fusion temperature, and a candidate ratio as inputs, and
wherein the candidate ratio matches the material ratio.
19 . The method of claim 17 , wherein determining the material ratio comprises:
obtaining a target reactivity index;
obtaining a biomass reactivity index; and
obtaining a second reactivity index of the set of materials, wherein determining the material ratio comprises:
predicting a candidate reactivity index using a reactivity index prediction model based at least in part on the biomass reactivity index, the second reactivity index, and a candidate ratio as inputs; and
wherein the candidate ratio matches the material ratio.
20 . The method of claim 16 , wherein preconditioning the input blend comprises hydrating the input blend based on a moisture parameter and a mass of the input blend to generate the first plurality of particles.
21 . The method of claim 20 , further comprising:
determining a target particle size associated with at least one of the second plurality of particles and the third plurality of particles;
obtaining a set of oven parameters; and
determining the moisture parameter based at least in part on the set of oven parameters and the target particle size by using a particle size model.
22 . The method of claim 20 , wherein:
hydrating the input blend comprises:
dispensing the input blend from a hopper storing the input blend onto a tray via a hopper port; and
concurrently rotating the input blend and hydrating the input blend via a nozzle directed toward the tray by activating a rotary actuator; and
charging the input blend into the oven comprises:
activating a conveyor to move the tray beneath a hammer;
stamping the input blend using the hammer; and
charging the input blend into the oven after stamping the input blend.
23 . The method of claim 16 , further comprising configuring the oven based on a set of oven parameters, wherein a first parameter of the set of oven parameters indicates a target temperature that is greater than 1,000° F. for a first duration, wherein charging the first plurality of particles into the oven comprises heating an interior of the oven to at least the target temperature for the first duration to convert the first plurality of particles into the second plurality of particles.
24 . The method of claim 23 , wherein the set of oven parameters indicates at least one of a second duration at a temperature different from the target temperature, a draft control parameter, or a heat exchanger flow rate.
25 . The method of claim 23 , further comprising angling an uptake port to increase an airflow through the oven.
26 . The method of claim 16 , wherein post-conditioning the second plurality of particles comprises:
exposing the second plurality of particles to an acid, wherein exposing the second plurality of particles to the acid comprises adding water, and the acid to the second plurality of particles in a mixing chamber to generate a pre-pellet mixture;
heating the mixing chamber to a mixing temperature;
mechanically mixing the pre-pellet mixture while the pre-pellet mixture is at the mixing temperature;
shaping the pre-pellet mixture to form a shaped pre-pellet mixture by rotating the pre-pellet mixture; and
adding a cross-linker to the shaped pre-pellet mixture to form the third plurality of particles, wherein the third plurality of particles comprises a cross-linked mixture,
wherein physically altering the third plurality of particles comprises actuating a cutter to divide the cross-linked mixture to form the coke pellets.
27 . The method of claim 16 , wherein:
the coke pellets comprise a first coke pellet,
the first coke pellet is shaped as a cylindrical body,
the cylindrical body comprises pyrolyzed biomass and a binder material,
a pH of a water content of the first coke pellet is greater than 6.0, and
a surface of the cylindrical body comprises a hydrophilic portion.
28 . The method of claim 16 , further comprising exposing the second plurality of particles to an acid.
29 . The method of claim 16 , wherein the coke pellets comprise a first coke pellet that is hydrophobic.
30 . The method of claim 16 , wherein exposing the second plurality of particles to the binder causes at least one of the second plurality of particles, the third plurality of particles, or the coke pellets to expel water.