150t/d Gold Ore in Tanzania - Cost Analysis of Gravity Separating and CIP Plant

01Cost-benefit Analysis of 150t/d Gold Ore Plant in Tanzania

It’s advisable that the ore veins of Tanzania NHM Company adopt the waste-lifting stoping mining methods. The ore bodies of different thicknesses have many similarities in the technology of waste-lifting stoping; and the labor and material costs that every mining cycle consumes are basically the same. The difference is that ore capacity from ore bodies of different thicknesses. Therefore, for the ore bodies with different thicknesses, we first count the labor and material costs of the sum of per ton ore and waste rock by the mining range of 1.1 m, and then calculate the mining costs of ore bodies with different thicknesses according to the ore capacity obtained by each mining cycle. The mining cost composition of NHM Company adopting the technology of waste-lifting stoping as follow:

No.	Cost Items	Unit	Unit Consumption	Unit Price （USD）	Unit Cost （USD）
I	Accessory Material
	Explosive	Kg	0.9	2.14	1.92
	Flash Detonator	piece	0.68	0.4	0.27
	Blasting Fuse	ｍ	1.８	0.45	0.8
	Drilling Bit	piece	0.02	5	0.1
	Drill Steel	Kg	0.06	2.8	0.17
	Wood	ｍ3	0.003	160	0.48
	Others				0.81
	Sub-Total				4.55
II	Power Consumption
	Electricity	kw.h	6.5	0.33	2.1
III	Wages of production workers				10.5
IV	Ore + rock direct operating costs			I + II +III	17.15
V	Ore + rock management costs				8.1
VI	Ore + rock construction team contracting profit			（IV + V）×20%	5.05
VII	Mining workshop manufacturing cost
	Actual thickness of mineral vein:0.75m				30.3
VIII	Apportion cost				9.7
	Mining cost				4.5
	Once lifting				2.4
	Transportation cost				0.32
	Draining cost				0.28
	Ventilating cost				0.3
	others				0.3
	Safety fee				1.6
IX	Total cost of mining				40

02Mineral processing costs of 150t/d Gold Ore Plant in Tanzania

No.	Items	Unit	Unit Consumption/tons	Unit Price （USD）	Unit Cost （USD/t）	Total consumption of a year	Total costs （Thousand USD）
I	Accessory Material				3.47		156.3
1	Adhesive Tape	m2	0.003	5	0.015	135	0.7
2	Liner Plate	kg	0.40	1.67	0.67	18t	30
3	Steel Ball	kg	1.50	1.33	2	67.5t	90
4	Engine Oil	kg	0.05	3.33	0.17	2.25t	7.5
5	Grease	kg	0.08	3.33	0.26	3.6t	12
6	Filter Cloth	m2	0.03	5.83	0.17	1350	7.9
7	Active Charcoal	kg	0.2	0.92	0.18	9t	8.2
II	Power Consumption				41.6		1872
1	Electricity	Kwh	124.8	0.33	41.6	5.616×106	1872
2	Water	m3	4.00	0	0	1.8×105	0
III	Reagents				5.17		232.5
1	Lime	Kg	4.00	0.17	0.67		30
2	NaCN	Kg	1.50	3	4.5		202.5
IV	Wages	USD/person.year			24.44		1100
V	Finance and others	RNB			0.25		11.3
	Total				74.93		3372.1

03Total Costs of 150t/d Gold Ore Plant in Tanzania

According to the above calculation of mining and dressing costs, the unit overall cost of eachmining and dressing is about 114.93 dollars per ton and the annual total costs is about 5,172,100 dollars

04Sales Revenue of 150t/d Gold Ore Plant in Tanzania

For this design, referring to the preliminary test preparation, the recovery rate of gravity separation is 50%; the gold leaching rate is 96.87%; the loss of the gold-melting Electric technology is 2% and the recovery rate of gold-smelting is 98%. Given the above data, the total recovery rate is（50%+50%*96.87%*98%）*98%=95.52%, namely, annually recovering 866.1kg gold.

If the sale price of gold is 35 dollars per gram, the annual sales revenue is about 30,313,500 dollars, tax without consideration.

05Profits of 150t/d Gold Ore Plant in Tanzania

In light of the above data, we can estimate that the annual return is 25,141,400 dollars and the profit of a unit of raw ore is 558.7 dollars per ton.

These data in this cost-benefit analysis are all pre-tax information, you can calculate the after-tax ones by yourself in accordance with local tax condition.