阅读说明：本技术 一种测定堆浸工艺矿石饱和容水率的方法 (Method for measuring saturated water holding rate of ore in heap leaching process ) 是由 王怀 郝福来 张世镖 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种测定堆浸工艺矿石饱和容水率的方法,该方法将质量为M的矿石混合均匀并置于渗滤柱中,取质量为m<Sub>1</Sub>的水置于一储液槽中；将上述储液槽中的水以8～16L/(m<Sup>2</Sup>·h)的喷淋强度均匀喷淋到上述渗滤柱中的矿堆上,并使渗滤液流回储液槽；持续喷淋,直至矿堆全部润湿且渗滤速度与喷淋速度持平,测量储液槽中水质量m<Sub>2</Sub>,矿石饱和容水率＝(m<Sub>2</Sub>-m<Sub>1</Sub>)/(M+(m<Sub>2</Sub>-m<Sub>1</Sub>))×100％；该操作简单、适用性强,获得的数据准确可靠,可为堆浸场设计和堆浸生产运行提供依据。(The invention discloses a method for measuring the saturated water holding rate of ore in a heap leaching process, which comprises the steps of uniformly mixing ore with the mass of M, placing the mixture in a percolation column, and taking ore with the mass of M 1 The water is put in a liquid storage tank; the water in the liquid storage tank is controlled to be 8-16L/(m) 2 H) uniformly spraying the spraying intensity on the ore heap in the percolation column, and making the percolation liquid flow back to the liquid storage tank; continuously spraying until the ore heap is completely wetted and the percolation speed and the spraying speed are equal, and measuring the water mass m in the liquid storage tank 2 The saturated water holding rate of ore (m) 2 ‑m 1 )/(M+(m 2 ‑m 1 ) X 100%; the method is simple to operate, high in applicability and accurate and reliable in obtained data, and can provide a basis for the design of a heap leaching field and the operation of heap leaching production.)

1. A method for measuring the saturated water holding rate of ore in a heap leaching process is characterized by comprising the following steps:

step one, taking ores in an ore pile, uniformly mixing, weighing, recording the mass as M, placing in a percolation column, and taking the mass as M₁The water is placed in a liquid storage tank;

step two, the water in the liquid storage tank is filled with 8-16L/(m)²H) uniformly spraying the ore in the percolation column with the spraying strength, and making the percolation liquid flow back to the liquid storage tank;

and step three, continuously spraying until the ores in the percolation column are completely wetted and the percolation speed is equal to the spraying speed, measuring the mass of the liquid in the liquid storage tank and recording the mass as m₂The saturated water holding rate of ore in the heap is (m)₂-m₁)/(M+(m₂-m₁))×100％。

2. The method for determining the saturated water holding rate of ore in heap leaching process according to claim 1, wherein the mass M of ore in the ore heap and the mass M of water in the liquid storage tank are obtained in the first step₁And the mass m of the liquid in the liquid storage tank in the step three₂The measurement units are the same.

Technical Field

The invention belongs to the technical field of wet metallurgy, and particularly relates to a method for determining the saturated water holding rate of ore in a heap leaching process.

Background

Heap leaching is a process in which a heap of ores is sprayed with a leaching solution to selectively leach out the useful components of the ores during downward infiltration, and the useful components are recovered from the pregnant solution flowing out of the bottom of the heap. The heap leaching method is mainly applied to the mining of copper ores, uranium ores, gold ores and silver ores and the treatment of smelting plant slag and dressing plant tailings containing used components.

The saturated water holding capacity of the ore refers to the percentage of the water content of the ore relative to the total weight (dry ore weight plus water absorption) of the saturated ore when the ore absorbs water to reach a saturated state. The saturated water holding capacity of ore is an important physical parameter for heap leaching of ore, which affects the permeability and oxygen content of the heap and limits the leaching rate and leaching rate of useful components in the ore. The main purpose of determining the saturated water holding rate of the ore is to provide a basis for the design of a heap leaching field and the operation of heap leaching production.

At present, the saturated water holding rate of heap-leached ores is usually determined by a soaking method, in the method, a closed ore heap is soaked by a large amount of water (the liquid level is higher than the top of the ore heap), leachate of the ore heap is collected at regular intervals, the amount of the liquid is measured, then the leachate is returned to the ore heap again to be continuously soaked until the leachate is not reduced, and the saturated water holding rate of the ores can be calculated by counting the change of the water amount. This approach has some problems: when the percolate of the ore heap is collected, a large amount of liquid quickly seeps and washes the ore heap under the action of gravity to cause the fine particles in the ore heap to move down collectively, and the percolate is difficult to measure due to the non-uniform collection standard and the large amount of fine mud contained when the percolate stops being collected; after the ores are saturated and contain water, the distribution of the ores in the ore pile is greatly changed, and the subsequent leaching of useful components and the operation of a heap leaching process are influenced; the difference between the ore heap soaking and the spraying in the heap leaching industrial production is that the saturated water holding rate value measured by the soaking method cannot be perfectly matched with the actual heap leaching industrial production. Therefore, there is a need to find a measuring method which is simple in measurement, does not affect the ore distribution in the ore heap, and can well provide reliable parameters for the heap leaching industrial production.

Disclosure of Invention

In order to overcome the problems, the invention provides a method for measuring the saturated water holding rate of ore in the heap leaching process, which has the advantages of simple operation, strong applicability and accurate and reliable data.

The invention comprises the following steps:

step one, taking ores in an ore pile, uniformly mixing, weighing, recording the mass as M, placing in a percolation column, and taking the mass as M₁The water is placed in a liquid storage tank;

step two, the water in the liquid storage tank is filled with 8-16L/(m)²H) sprayingUniformly spraying the ore in the percolation column with the strength, and making the percolation liquid flow back to a liquid storage tank;

and step three, continuously spraying until the ores in the percolation column are completely wetted and the percolation speed is equal to the spraying speed, measuring the mass of the liquid in the liquid storage tank and recording the mass as m₂The saturated water holding rate of ore in the heap is (m)₂-m₁)/(M+(m₂-m₁))×100％。

The mass M of the ore in the ore pile and the mass M of the water in the liquid storage tank are obtained in the step one₁And the mass m of the liquid in the liquid storage tank in the step three₂The measurement units are the same.

The invention has the beneficial effects that:

the saturated water holding rate of the ore is determined by adopting a spraying mode, the saturated water holding rate is consistent with the heap leaching industrial production mode, and the spraying strength is consistent with the saturated water holding rate; liquid in the ore heap slowly permeates and wets, so that disturbance of fine particles in the ore heap is avoided, and the percolate is clear and does not contain fine mud; after the ores are saturated and contain water, the ore distribution in the ore pile is basically unchanged, and the leaching of the subsequent useful components and the operation of the heap leaching process are not influenced; the obtained data is accurate and reliable, and can provide basis for the design of a heap leaching field and the operation of heap leaching production.

Detailed Description