Chemical addition equipment and chemical addition method for beneficiation and flotation

Abstract

The invention discloses a drug adding device for mineral flotation. The drug adding device comprises a filtering device, a feeding box and a linear screening type filter, wherein the filtering deviceis arranged upstream a drug stirring tank; the feeding box comprises a box body, a feeding port, a discharging port and a built-in separating plate for stopping a drug to flow; the drug flow between the feeding port and the discharging port is not completely cut off by the separating plate; a drug overflows to the discharging port from the feeding port through the separating plate, so as to realize the primary filtering for the drug; the linear screening type filter is connected with the discharging port of the feeding box so as to secondarily filter the drug; the linear screening type filtercomprises an opening type straining box, a sieve plate with sieve pores and a detachable baffle; the sieve plate has an inclined angle with the horizontal plane and is detachably arranged in the straining box; the detachable baffle is vertical to a flow direction of the drug and is arranged in the middle of the sieve plate; a gap exists between the sieve plate and the bottom of the straining box;one side of the sieve plate close to the discharging port of the feeding box is higher than the other side of the sieve plate away from the discharging port of the feeding box. The invention also provides a drug adding method for mineral flotation. The drug adding device and the drug adding method provided by the invention can be widely applied to the industries of metallurgy, coals, nonferrous industry, and the like.

Description

technical field [0001] The invention relates to technical fields such as metallurgy, nonferrous metals, and coal, and in particular to a reagent adding device for ore dressing flotation and a reagent adding method for mineral dressing and flotation. Background technique [0002] Iron ore in metallurgical mines contains more than two kinds of iron minerals, which leads to complicated beneficiation process and poor selectivity. When iron ore coexists with siderite, hematite, goethite, limonite and specularite and other weak magnetic ores, due to the difference in physical and chemical properties and embedded particle size of different iron minerals, at the same time, Gangue minerals are relatively complex and contain high Si content, which is a refractory ore. Therefore, in order to obtain high-grade and high-recovery concentrate products, it is necessary to increase the flotation process in the beneficiation process. The flotation method is a widely used mineral processing m...

AI Technical Summary

Problems solved by technology

[0006] First, due to the unreasonable setting of the filter device in the existing chemical mixing tank, for example, only using a filter to filter the chemical slurry once, the particulate impurities in the CaO chemical and the broken woven bag strips packed with CaO will enter the CaO adding pump, causing the pump to Blockage in the body, fracture of the pump shaft, damage to the pump coupling, locked-rotor burning of the pump motor, and even system tripping. As a result, not only the cost of spare parts added by CaO and the workload of operators will be increased, but also the normal production of the system will be affected in severe cases. run

[0007] Second, due to the unreasonable setting of the filter device in the existing chemical mixing tank, for example, only using a filter to simply filter the chemical slurry once, the particulate impurities in the CaO chemical and the broken woven bag strips packed with CaO can enter the CaO delivery pipeline, which can cause The amount of CaO added at on-site dosing points such as roughing dosing point 5 and selected dosing point 6 is not enough, resulting in a decline in production indicators, and even serious impurity can block the pipeline and cause on-site CaO drug outage. As a result, not only the production indicators It is unqualified and causes confusion in the production system, resulting in low concentrate grades and high tailings grades on site, greatly reducing the concentrate production rate and recovery rate, and causing serious economic losses to the company.

[0008] Third, because the existing chemical mixing tank cannot control the liquid level, it may cause the liquid level of the on-site chemical adding tank to be too high, which will lead to excessive chemical addition or even overflow, resulting in confusion of on-site production indicators and on-site chemical overflow , and affect the cleanliness of the on-site environment, and the discharge of chemicals to the outside, so that it does not meet the requirements of green production; or the liquid level in the on-site agent addition tank is too low, which cannot be detected in time, resulting in a small amount of agent addition or even interruption of the on-site production system , leading to confusion of production indicators and scrapping of indicators

[0009] Fourth, because the existing agent adding tank cannot control the amount of agent added and the return flow of the agent, it cannot effectively control the amount of agent added on site, resulting in a large amount of agent added, confusion in on-site production indicators, or the amount of agent added is too small so that Due to the occurrence of drug cut-off and overflow of drug adding tanks, as a result, not only the production indicators are affected, but also the site environment cleanliness is affected, which ultimately leads to a decrease in the recovery rate of the target product, resulting in waste of resources and production costs

[0010] Fifth, when adding the medicine, due to the unreasonable structure and filtration of the existing medicine receiving device, the medicine in the adding tank may splash outside. As a result, it not only affects the production environment, but also increases the labor intensity of the staff cleaning the site, and causes the medicine to be wasted , causing certain economic losses to the enterprise

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