A semi-autogenous mill discharge device

Abstract

The invention relates to the technical field of semi-autogenous mills, and discloses a semi-autogenous mill discharge device, which includes a semi-autogenous mill end cover and a discharge pipe. The inner side of the end cover is provided with a radial uniform The support plates are distributed at intervals, and a dustpan plate is arranged between any two support plates. The dustpan plate includes a fan-shaped liner, a side liner and an arc liner. The end surface of the support plate is far away from the fixed end of the end cover. There are fan-shaped grid plates, and the inner ring ends of the fan-shaped grid plates are all equipped with deflectors. Multiple fan-shaped grid plates together form a ring-shaped grid plate. The two deflectors together form the central discharge chute connecting the pulp accommodating chamber and the discharge pipe. The invention overcomes the problem that the general discharge grid board in the prior art is difficult to disassemble, shortens the construction period for replacing the lining board, expands the range of material selection for the discharge dustpan board, and reduces production costs.

Description

technical field [0001] The invention relates to the technical field of semi-autogenous mills, in particular to a semi-autogenous mill discharge device. Background technique [0002] The discharge dustpan plate of the semi-autogenous mill is used as a forced discharge device for pulp. In addition to protecting the discharge end cover from wear, it also supports the grid plate stacked on it. Therefore, the dustpan plate is required to be wear-resistant and durable. Good impact resistance and rigidity, if the impact resistance is insufficient, it is easy to cause the dustpan plate to break due to the impact of steel balls on the grid plate, and the lack of rigidity will cause the grid plate to shake during the operation of the mill, resulting in frequent grating plate fixing bolts. fracture. [0003] At present, the commonly used dustpan plate material is wear-resistant alloy cast steel. This kind of discharge dustpan plate has a heavy weight, which causes the self-weight of t...

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Problems solved by technology

[0002] The discharge dustpan plate of the semi-autogenous mill is used as a forced discharge device for pulp. In addition to protecting the discharge end cover from wear, it also supports the grid plate stacked on it. Therefore, the dustpan plate is required to be wear-resistant and durable. Good impact resistance and rigidity, if the impact resistance is insufficient, it is easy to cause the dustpan plate to break due to the impact of steel balls on the grid plate, and the lack of rigidity will cause the grid plate to shake during the operation of the mill, resulting in frequent grating plate fixing bolts. fracture

[0003] At present, the commonly used dustpan plate material is wear-resistant alloy cast steel. This kind of discharge dustpan plate has a heavy weight, which causes the weight of the discharge end of the mill to be much greater than that of the feed end, and the production cost is high.

When changing the liner of a large mill, the steel balls and materials in the mill will not be discharged, but the operation method is adopted, and the operation position of changing the liner is located at the side of the mill, which causes the dustpan board to be installed When using the grid plate, due to the heavy weight, the bolt holes of the dustpan plate and the bolt holes of the end cover are misaligned, and the fixing bolts of the grid plate and the groove plate are in contact with the bolt holes of the end cover. The bolts of the grid plate will always contact and rub against the bolt holes of the end cover, which not only damages the bolt holes of the end cover, but also makes it impossible to pull out the bolts when disassembling the grid plate. Extracting bolts adds a lot of unnecessary work and prolongs downtime

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