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Pellet binder and adding device and adding method thereof
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A binder and pellet technology, applied in chemical instruments and methods, dissolution, mixers, etc., can solve the problems of pellet grade reduction and achieve the effects of simple preparation method, protection of mineral resources, and convenient addition method
Active Publication Date: 2013-07-31
ANGANG STEEL CO LTD
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And the SiO in bentonite 2 It cannot be evaporated during the pellet roasting process, and remains in the pellets, reducing the grade of the pellets
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Embodiment 1
[0021] Weigh 600 kg of chrysanthemum root powder, 300 kg of sodium carboxymethyl cellulose powder, and 100 kg of montmorillonite, and dry mix them uniformly to make the pellet binder of the present invention.
[0022] The addition method of pellet binder is:
[0023] First of all, according to the weight of the pellet mixture transported by the material belt 1 per unit time and unit length, the weight of the binder to be added and the distribution of the binder on the electronic belt scale 2 are calculated correspondingly, as the electronic belt scale 2 According to the matching and adding basis, and set the amount of material spread per unit time and unit length of the adhesive powder point on the electronic belt scale 2.
[0024] Then, the prepared binder powder is loaded into the binder tank 3 in batches. Open the binder tank 3, and the electronic belt scale 2 adds binder to the pellet mixture according to the weight of the binder to be transported per unit time and unit l...
Embodiment 2
[0026] Weigh 630 kg of chrysanthemum root powder, 290 kg of sodium carboxymethyl cellulose powder, and 80 kg of montmorillonite, and dry mix them uniformly to make the pellet binder of the present invention.
[0027] The addition method of pellet binder is:
[0028] First of all, according to the weight of the pellet mixture transported by the material belt 1 per unit time and unit length, the weight of the binder to be added and the distribution of the binder on the electronic belt scale 2 are calculated correspondingly, as the electronic belt scale 2 According to the matching and adding basis, and set the amount of material spread per unit time and unit length of the adhesive powder point on the electronic belt scale 2.
[0029] Then, the prepared binder powder is loaded into the binder tank 3 in batches. Open the binder tank 3, and the electronic belt scale 2 adds binder to the pellet mixture according to the weight of the binder to be transported per unit time and unit le...
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Abstract
The invention provides a pellet binder and an adding device and an adding method thereof, wherein the pallet binder is prepared from the raw materials of yellow flower roots, sodium carboxymethylcellulose and montmorillonites. Before adding, according to the weight of the pellet mixture delivered per unit time and per unit length on a material belt, the weight of the binder to be prepared and added and the distribution amount of the binder on an electronic belt scale are correspondingly calculated. The electronic belt scale adds 4-7% by weight of the binder into the pellet mixture, the proportion of the binder being calculated according to the binder weight set to be delivered. The pellet binder has an adequate raw-material source and the auxiliary raw materials contain no harmful components such as ash content, silicon and the like. The pellet binder does not reduce the total iron content, can substitute or partially substitute a bentonite binder, raising the grade of finished product minerals by over 1.0% and reducing SiO2 content by 0.8%. The pellet binder, with a simple preparation method, is suitable for mass production and can satisfy production requirements of various poor-quality concentrates.
Description
technical field [0001] The invention belongs to the field of sintering additives, and in particular relates to a binder used for sintering pellet mixtures and its adding device and adding method. Background technique [0002] In the production process of sintered pellets, a certain amount of bentonite needs to be added in the preparation of green pellets. Bentonite has high water absorption, which can adjust the raw material moisture of pellets, stabilize the operation of pellets, and improve the strength of green pellets and finished pellets. However, the main component of bentonite is SiO2. Adding bentonite to green pellets will reduce the iron content of the pellets and affect the blast furnace output and coke ratio. In addition, due to the high melting point of bentonite, connecting bridges will be formed between iron oxide particles when the pellets are roasted, blocking the passage into the internal voids, resulting in a decrease in the reducibility of the pellets and ...
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