Reagents and methods for promoting the flotation separation of iron ore from associated iron-bearing silicates

Abstract

The application discloses a reagent for promoting the flotation separation of iron ore and associated iron-containing silicates, which is used for adsorbing excessive Ca 2+ Ions in the flotation circulating water and selectively separating specularite and chlorite by reverse flotation. The reagent is sequentially added in a suitable pH environment and reverse flotation operation can effectively promote the difference in floatability between iron ore and iron-containing silicates and reduce the excessive Ca 2+ Ions in the flotation circulating water. The quality of iron concentrate can be improved by reverse flotation. The reagent has high adaptability to the flotation environment and can maintain good flotation performance in a common environment with pH=6-8. Excellent separation effect can be achieved under the condition of low dosage, and the phenomenon of excessive Ca 2+ Ions in the flotation circulating water caused by the collapse of the mining filling body into the concentrate can be effectively improved. Compared with the conventional iron ore depressant starch and dextrin used alone, the pre-adsorption reagent system can obtain better iron ore concentrate index through reverse flotation, and further reduce the gangue inclusion and dissolved Ca 2+ Ions in the flotation circulating water.

Description

Technical Field

[0001] This invention belongs to the field of reverse flotation of iron silicate ore, specifically to reagents and flotation methods for promoting the separation of iron ore and associated iron silicates. Background Technology

[0002] Iron ore, a crucial raw material for the steel industry, is one of the world's most important strategic mineral resources for industrial development. Although my country possesses abundant iron ore reserves, compared to other countries, its iron ore resources are generally characterized by being "poor, fine-grained, and complex." Most iron ore types have complex compositions, with a significant proportion being difficult-to-process ores and multi-component associated ores, making separation challenging. Specularite, a common iron oxide mineral, naturally occurs alongside chlorite, an iron-bearing silicate gangue. The two minerals have similar magnetic susceptibility and density. Furthermore, chlorite has low hardness and a fine particle size distribution, making it easily crushed during crushing. During grinding, it coats the surface of iron concentrate particles as mud, severely affecting separation efficiency. However, reverse flotation can yield better concentrate indicators for fine-grained minerals.

[0003] Furthermore, during underground iron ore mining, the solidified packing material adjacent to the mining area inevitably collapses during extraction and enters the flotation system along with the raw ore. The large amount of calcium-containing substances (metallurgical slag and gypsum, etc.) in the packing material generates significant amounts of calcium during grinding and agitation. 2+ Dissolution, dissolution of Ca 2+ Although this eliminates the need for additional activators in the original anion reverse flotation system, excessive Ca... 2+ Not only does it consume the collector in the pulp, causing a decrease in the grade of the flotation concentrate, it also significantly increases the ionic strength of the pulp solution, increasing pulp viscosity and reducing pulp dispersibility, leading to difficulties in defoaming and severe flotation cell run-off. Furthermore, it makes subsequent impurity removal processes more cumbersome. In actual production, it is necessary to add a large amount of sodium carbonate (a calcium remover) while simultaneously increasing the dosage of both depressants and collectors to barely maintain flotation parameters, resulting in enormous resource waste and cost consumption.

[0004] Therefore, how to utilize novel reagents or processes to improve separation efficiency and remove excess Ca mixed into the slurry by the backfill material during mining is crucial. 2+ The efficient utilization of iron-containing silicates is of great research significance. Summary of the Invention

[0005] The technical problem to be solved by this invention is:

[0006] The problems include low separation efficiency of iron silicate iron ore, high calcium ion concentration in the slurry circulating water caused by the collapse of the filling material in the mining area, which affects the flotation selectivity, and high calcium removal costs in actual production.

[0007] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0008] A flotation separation agent for iron ore and associated iron-containing silicates, comprising component A, inhibitor B, and collector;

[0009] Component A is at least one compound having a structural formula of Formula 1 or Formula 2;

[0010] Wherein, Equation 1:

[0011]

[0012] Wherein, the R1 group is a C2-C6 alkyl, phenyl, or substituted phenyl or amide group.

[0013] Wherein, Equation 2:

[0014]

[0015] Wherein, the R2 group is a substituent group having the structure of Formula 3 or a substituent group that is the same as the R1 group;

[0016] Among them, Equation 3:

[0017]

[0018] Wherein, X is at least one of the elements such as H, Na, and K;

[0019] Wherein, Y is at least one of elements such as N and C;

[0020] Wherein, R3 and R4 are individually at least one of H and C1 to C3 alkyl groups;

[0021] The collector is a fatty acid anionic collector, using an excess of Ca. 2+ Ion simulation of actual production conditions;

[0022] The inhibitor B is a small molecule iron ore inhibitor.

[0023] Preferably, the inhibitor B is one or more of dextrin and modified starch.

[0024] Preferably, the mass ratio of component A, inhibitor B, and collector is (0.15-1.5):(0.25-3):1.

[0025] A method for promoting the flotation separation of iron ore and associated iron-bearing silicates involves crushing, sorting, and grinding the iron ore and iron-bearing silicate minerals, mixing and stirring the minerals, adjusting the pH of the slurry to 6-10, and adding Ca... 2+The ion concentration is 50-200 mg / L, and the above-mentioned flotation separation agent for iron ore and associated iron silicate is added at one time for flotation operation, and the iron silicate gangue is separated by reverse flotation.

[0026] This invention benefits from the excellent selectivity of the reagent (component A) for gangue, pre-adsorbing it and thus enhancing the difference in floatability between gangue minerals and iron ore. Subsequently, it forms a synergistic collection with the collector, further enhancing the hydrophobicity of the gangue minerals, making them easier to carry to the surface by air bubbles. Simultaneously, due to the selectivity of component A, the collector primarily acts on the gangue minerals, with minimal impact on the iron ore, thereby maintaining the selectivity of flotation. The inhibitor B (small molecule inhibitor) interacts with active sites on the iron ore surface during flotation, reducing collector adsorption and effectively inhibiting iron ore floatability. Finally, reverse flotation promotes the separation of gangue minerals and iron ore, helping to solve the problem of difficult separation between fine-grained iron ore and gangue due to their similar properties, further improving iron ore grade and recovery rate.

[0027] Preferably, the pH of the flotation pulp is 6 to 8.

[0028] Preferably, the amount of component A used in the flotation process is 6-30 mg / L, and the amount of inhibitor B used is 30-90 mg / L.

[0029] Preferably, the amount of collector used in the flotation process is 30-70 mg / L.

[0030] Preferably, the amount of collector used in the flotation process is 40-50 mg / L.

[0031] Preferably, the temperature of the flotation pulp is 15–40°C, and more preferably 20–30°C.

[0032] Preferably, the iron-bearing silicate gangue mainly includes at least one of chlorite, aegirine, quartz and feldspar, and the iron ore is refined iron ore.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. Compared to using traditional iron ore inhibitor starch alone, using a pre-adsorbent reagent system can achieve better iron ore concentrate indicators through reverse flotation, while further reducing gangue entrainment in the concentrate. Simultaneously, using anionic collectors in flotation can improve the problems of cationic collectors easily precipitating in low-temperature environments and the excessively thick froth layer and poor mineral flowability during flotation.

[0035] 2. This invention is the first to discover that component A, which has the structure of Formula 1 or Formula 2, has excellent selective adsorption on gangue. Furthermore, it is found that component A has certain selective collecting performance on target gangue minerals. When used in combination with anionic collectors, it can form a synergistic collecting effect. Through synergistic effect, it can further promote the reverse flotation efficiency of iron ore.

[0036] 3. At present, the iron ore beneficiation process is cumbersome and complicated. This composite reagent system can effectively reduce the number of beneficiation processes, while significantly reducing the amount of inhibitor used and further reducing the viscosity of the slurry, which is beneficial to the subsequent processing. At the same time, the reagent is environmentally friendly, and the treatment of flotation wastewater and waste ore is not difficult.

[0037] 4. The iron ore flotation method provided by this invention can also address excess Ca caused by the mixing of the filling material into the slurry. 2+ Ion adsorption not only ensures the activation of the collector but also enhances the difference in floatability between gangue minerals and iron ore, improving the selectivity of the flotation process and avoiding the formation of Ca. 2+ Excessive ions lead to increased collector consumption and viscous flotation foam. Attached Figure Description

[0038] Figure 1 These are schematic diagrams of the flotation process in Embodiments 1-7 and Comparative Examples 1-2 of the present invention;

[0039] Figure 2 This is a schematic diagram of the flotation process for artificially mixed ores in Example 3;

[0040] Figure 3 The flotation curves of specular hematite and chlorite are shown for the dosage of component A in flotation reagent combinations 1 and 2.

[0041] Figure 4 The effect of pulp pH on the flotation effect of single minerals such as specular hematite and chlorite. Detailed Implementation

[0042] To facilitate understanding of the present invention, the present invention will be further described below with reference to the accompanying drawings, preferred embodiments, and comparative examples. The embodiments described below are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0043] Table 1 lists the initial particle size, origin, and metal grade of the ore used in this invention.

[0044]

[0045] Example 1

[0046] To verify the separation effect of different flotation reagent combinations in slurry according to the present invention, we adopted... Figure 1The flotation process shown uses different flotation reagent combinations 1 and 2 to float the selected minerals. The parameters involved in the flotation process are the same, the only difference is the combination of flotation reagents.

[0047] The specific flotation process in this embodiment is as follows:

[0048] Place 2g of specular hematite or chlorite into a 50mL flotation cell, add an appropriate amount of water and stir thoroughly for 3 minutes. Add different flotation reagent solutions, stirring for 2 minutes after each addition. Then float and skim the bubbles for 5 minutes. After the flotation is complete, filter, dry and weigh the concentrate and tailings separately, and calculate the recovery rate as shown in Table 2. Figure 2 As shown.

[0049] Flotation reagent combination 1 consists of component A (main structure is formula 2, where Y is nitrogen and R3 is CH2), component B (dextrin), and a collector, which is sodium oleate, using 150 mg / L Ca. 2+ Ions simulate the actual production environment;

[0050] Flotation reagent combination 2 consists of component A (main structure of formula 2, where Y represents nitrogen and R4 represents CH2), component B (dextrin), and a collector, which is sodium oleate, using 150 mg / L of Ca. 2+ Ions simulate the actual production environment;

[0051] The mass ratio of the added agents A:B:collector is 0.15–0.75:0.75:1.

[0052] Furthermore, the dosages of dextrin and sodium oleate were fixed at 30 mg / L and 40 mg / L, respectively;

[0053] The initial slurry pH for the flotation process was set to 7, and the agitator speed was between 1500-1800 rpm.

[0054] Table 2 shows the effect of different reagent combinations on the recovery rates of specular hematite and chlorite single minerals.

[0055]

[0056]

[0057] Comparative Example 1

[0058] The selected minerals were floated using flotation reagent combination 3. Except for the different reagent combination and reagent dosage, the parameters and steps involved in the flotation process were the same as in Example 1.

[0059] Flotation reagent combination 3 consists of component B (dextrin) and a collector, the collector being sodium oleate, using 150 mg / L Ca. 2+Ion flotation was simulated in a real production environment. To ensure effective flotation, sodium carbonate, a calcium removal agent, was used to adsorb excess calcium ions at a concentration of 120 mg / L.

[0060] The mass ratio of the agent to the collector is B: 0.25 to 3:1.

[0061] Furthermore, the dosage of the collector is fixed at 40 mg / L.

[0062] Table 3 shows the effect of reagent combination 3 on the recovery rates of specular hematite and chlorite.

[0063]

[0064] The results of Example 1 and Comparative Example 1 show that, under the same single-mineral flotation conditions, the traditional flotation reagent combination (dextrin + sodium oleate) has poor separation efficiency for specular hematite and chlorite. However, the addition of component A, which has a pre-adsorption effect, significantly improves the gangue recovery rate, thereby enabling the collection of iron concentrate through reverse flotation. Reagent combination 1 and reagent combination 2 achieve optimal separation parameters at component A concentrations of 12 mg / L and 9 mg / L, respectively. Reagent combination 2 exhibits better chlorite collection efficiency than reagent combination 1. This demonstrates that the flotation reagent combination involved in this invention can efficiently separate iron-containing silicate-type iron ores, while achieving excellent separation results even at low dosages, greatly reducing the cost of multiple separation processes in the plant.

[0065] Example 2

[0066] The reverse flotation case provided in Example 2 differs from Example 1 in that it investigates the effect of different pulp pH values ​​on the mineral separation effect under the optimal reagent dosage conditions in Example 1. The flotation process is basically the same as in Example 1 and will not be repeated here. The experimental results are shown in Table 4. Figure 4 As shown.

[0067] The pH gradients involved in the experiment were selected as 2, 4, 6, 8, and 10.

[0068] Table 4 shows the effect of different pulp pH on the single mineral recoveries of specularite and chlorite.

[0069]

[0070] According to Table 4 and Figure 4 The results show that the pH of the slurry affects the activity of each solution component. Mineral separation is more suitable in the pH range of 6 to 8, which can effectively capture 70 to 90% of chlorite. However, too low a pH value will reduce the difference in recovery rate between minerals and reduce the separation effect. When the pH value is greater than 8, the recovery rate of specular hematite also increases significantly, which reduces the effective separation between minerals.

[0071] In summary, both reagent combination 1 and reagent combination 2 showed the best separation effect at pH=6, at which the two combinations could obtain separation indices of 65.5% and 80.2% respectively. Therefore, pH=6 can be selected as the optimal pH for subsequent artificial mixed minerals.

[0072] Example 3

[0073] To verify the separation effect of the flotation reagent combination of the present invention in artificial mixed ore, we used specular hematite and chlorite mixed in a 1:1 ratio to carry out flotation of artificial mixed ore. The flotation process was basically the same as in Example 1. The test results are shown in Table 5.

[0074] Flotation reagent combination 1 consists of component A (main structure is formula 2, where Y is nitrogen and R3 is CH2), component B (dextrin), and a collector, which is sodium oleate, using 150 mg / L Ca. 2+ Ion simulation of actual production environment, reagent addition ratio is 0.3:0.75:1, slurry pH is 6;

[0075] Flotation reagent combination 2 consists of component A (main structure of formula 2, where Y represents nitrogen and R4 represents CH2), component B (dextrin), and a collector, which is sodium oleate, using 150 mg / L of Ca. 2+ Ion simulation of actual production environment, reagent addition ratio is 0.225:0.75:1, slurry pH is 6;

[0076] Table 5 shows the effects of different reagent combinations on the indicators of artificially mixed specular hematite and chlorite.

[0077]

[0078]

[0079] Comparative Example 2

[0080] The selected minerals were artificially mixed and floated using flotation reagent combination 3. Except for the different reagent combination and reagent dosage, the parameters and steps involved in the flotation process were the same as in Example 1.

[0081] Flotation reagent combination 3 consists of component B (dextrin) and a collector, the collector being sodium oleate, using 150 mg / L Ca. 2+ Ion simulation was performed to simulate the actual production environment. To ensure the flotation effect, sodium carbonate, a calcium removal agent, was used to adsorb excess calcium ions at a dosage of 120 mg / L. The experimental results are shown in Table 6.

[0082] Table 6 shows the effects of reagent combination 3 on the indicators of artificially mixed ore of specular hematite and chlorite.

[0083]

[0084] The results of the artificially mixed ore in Example 3 and Comparative Example 2 show that the traditional flotation reagent combination 3, with excess Ca, [is effective]. 2+ In some environments, large amounts of sodium carbonate, a calcium remover, need to be added beforehand to remove excess calcium ions, resulting in a low iron grade and poor separation efficiency in the final concentrate. However, by adding component A, which has a pre-adsorption effect as described in this invention, the collection of iron concentrate by reverse flotation can be significantly improved, yielding excellent concentrate indicators. This demonstrates that the flotation reagent combination involved in this invention can efficiently separate iron-bearing silicate-type iron ore while avoiding the introduction of excessive calcium ions into the slurry circulating water due to various reasons. 2+ Impact on flotation parameters.

[0085] Examples 4-7

[0086] To further verify the separation effect of the system of the present invention on iron silicate type iron ore, the present invention selected reagents with four structures as component A, and still used specular hematite and chlorite samples from Lilou mining area in Anhui Province and mixed them uniformly in a 1:1 ratio for artificial mixed ore flotation. The flotation process was basically the same as in Example 3, and the test results are shown in Table 7.

[0087] The reagent combination 3 involved in Example 4 consists of component A (main structure of formula 1, R3 is phenyl), component B (dextrin), and a collector, the collector being sodium oleate, using 150 mg / L Ca 2+ Ion simulation of actual production environment, reagent addition ratio is 0.375:0.75:1, slurry pH is 8;

[0088] The reagent combination 4 involved in Example 5 consists of component A (main structure of formula 1, R1 is a C6 alkyl chain), component B (dextrin), and a collector, the collector being sodium oleate, using 150 mg / L Ca 2+ Ion simulation of actual production environment, reagent addition ratio is 0.3:0.75:1, slurry pH is 6;

[0089] The reagent combination 5 involved in Example 6 consists of component A (main structure of formula 1, R1 of formula 3, Y as element C, R4 as C4 alkyl chain and carboxyl group), component B (dextrin), and a collector, the collector being sodium oleate, using 150 mg / L Ca 2+ Ion simulation of actual production environment, reagent addition ratio is 0.225:0.75:1, slurry pH is 8;

[0090] The reagent combination 6 involved in Example 7 consists of component A (main structure of formula 2, R2 being a C4 alkyl chain), component B (dextrin), and a collector, the collector being sodium oleate, using 150 mg / L Ca 2+Ion simulation of actual production environment, reagent addition ratio is 0.225:0.75:1, slurry pH is 6;

[0091] Table 7 shows the effects of Examples 4-7 on the indicators of artificially mixed specular hematite and chlorite minerals.

[0092]

[0093] As can be seen from Table 6, the presence of both alkyl and carboxyl groups in component A results in better flotation performance than the presence of only alkyl groups. This indicates that the addition of carboxyl groups is beneficial to the adsorption of component A during the flotation process. Comparing Examples 1 to 7, the flotation concentrate recovery rate obtained by component A under the structure of Formula 2 is more stable. This further illustrates that when there are two or more phosphonic acid groups, the separation effect on iron-containing silicate minerals is better.

[0094] Example 8

[0095] To verify the adsorption effect of the flotation reagent combination of the present invention on various ions, we selected the flotation reagent combinations 1-7 used in Examples 3-7 and Comparative Example 1, and used actual mineral processing circulating water from the Lilou mining area in Anhui Province (the target mineral collected was iron oxide ore, the main gangue was chlorite and quartz, and the main impurity element in the circulating water was Ca). 2+ Mg 2+ SO4 2- (etc.) were used as test materials for ion adsorption experiments, and the test results are shown in Table 8.

[0096] Reagent combination 1 consists of component A (main structure is formula 2, Y is N element and R3 is CH2 in formula 3), component B (dextrin) and collector, the collector is sodium oleate, the reagent addition ratio is 0.3:0.75:1, and the pulp pH is 6;

[0097] Reagent combination 2 consists of component A (main structure is formula 2, Y is N element and R4 is CH2 in formula 3), component B (dextrin) and collector, the collector is sodium oleate, the reagent addition ratio is 0.225:0.75:1, and the pulp pH is 6;

[0098] Reagent combination 3 consists of component A (main structure of formula 1, R3 is phenyl), component B (dextrin) and collector, the collector being sodium oleate, the reagent addition ratio being 0.375:0.75:1, and the pulp pH being 8;

[0099] Reagent combination 4 consists of component A (main structure of formula 1, R1 is a C6 alkyl chain), component B (dextrin) and collector, the collector being sodium oleate, the reagent addition ratio being 0.3:0.75:1, and the pulp pH being 6;

[0100] Reagent combination 5 consists of component A (main structure of formula 1, R1 of formula 3, Y of element C, and R4 of C4 alkyl chain and carboxyl group), component B (dextrin) and collector, the collector being sodium oleate, the reagent addition ratio being 0.225:0.75:1, and the pulp pH being 8;

[0101] Reagent combination 6 consists of component A (main structure of formula 2, R2 is a C4 alkyl chain), component B (dextrin) and collector, the collector being sodium oleate, the reagent addition ratio being 0.225:0.75:1, and the pulp pH being 6;

[0102] Flotation reagent combination 7 consists of component B (dextrin) and a collector, with sodium oleate added at a ratio of 0.75:1. Calcium removal is performed using 120 mg / L sodium carbonate, and the pulp pH is 7.

[0103] Table 8 shows the removal rates (%) of various ions in mineral processing circulating water for different reagent combinations.

[0104]

[0105] Table 7 shows that the combination of pre-adsorbent component A affects Ca 2+ The ion removal rates all reached over 85%, showing a significant improvement in ion removal efficiency compared to the control group (traditional reagent combination 7). Meanwhile, component A, the pre-adsorption reagent combination, in addition to its effectiveness against Ca... 2+ In addition to providing good removal effects on ion surfaces, it can also increase the removal of Mg to a certain extent. 2+ The removal efficiency of ions, while SO4 2- Although it cannot be removed by pre-adsorption of component A, the excess SO4 caused by the pH adjuster 2- And some components, such as salt A, can be removed using a post-neutralization process, including Ca. 2+ Ion removal significantly simplifies the flotation process.

[0106] In summary, compared to conventional flotation, this invention adds a component A containing pre-adsorbed gangue before the depressant and collector. Firstly, research results demonstrate that component A effectively adsorbs onto the gangue surface, promoting the collector's capture of the gangue. Simultaneously, combined with component B's effective inhibition of specular hematite, the two together can effectively improve gangue recovery without affecting iron ore recovery. Secondly, the pre-adsorption system effectively adsorbs excess Ca that enters the flotation circulating water due to packing collapse. 2+ On the one hand, it reduces the use of calcium removal agents and reduces the interference of impurity elements on the grade of iron concentrate. On the other hand, it reduces the amount of collector used, effectively improving problems such as increased pulp viscosity and poor pulp dispersibility. Thus, it achieves the goal of purifying iron concentrate from iron-bearing silicate mixed iron minerals, providing a new solution to the problem of difficult separation between iron ore and iron-bearing silicate gangue with similar properties.

Claims

1. A flotation separation agent for iron ore and associated iron-containing silicates, characterized in that, It contains ingredient A, as well as inhibitor B and a collector; Component A is a compound having at least one of the structural formulas of Formula 1 or Formula 2; Wherein, Equation 1: ； Wherein, the R1 group is a C2~C6 alkyl, phenyl, or substituted phenyl or amide group; Wherein, Equation 2: ； Wherein, the R2 group is a substituent group having the structure of Formula 3 or a substituent group that is the same as the R1 group; Among them, Equation 3: ； or, ； Wherein, X is one of the elements H, Na, and K; Wherein, Y is one of the elements N and C; Wherein, R3 and R4 are individually one of H and C1 to C3 alkyl groups; The collector is a fatty acid anionic collector; Inhibitor B is dextrin.

2. The flotation separation agent for iron ore and associated iron-containing silicates according to claim 1, characterized in that, The mass ratio of component A, inhibitor B, and collector is (0.15–1.5):(0.25–3):

1.

3. A method for promoting the flotation separation of iron ore and associated iron-bearing silicates, characterized in that, Iron ore and iron-containing silicate minerals are crushed, sorted, and ground. After the minerals are mixed and stirred evenly, the pH of the slurry is adjusted to 6-10, and the Ca... 2+ The ion concentration is 50-200 mg / L, and a flotation operation is carried out by adding a flotation agent as described in any one of claims 1 to 2 to promote the separation of iron ore and associated iron-containing silicates, and the iron-containing silicate gangue is separated by reverse flotation.

4. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 3, characterized in that, The pH of the ore pulp in the flotation process is 6–8.

5. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 3, characterized in that, In the flotation process, the dosage of component A is 6–30 mg / L, and the dosage of inhibitor B is 30–90 mg / L.

6. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 3, characterized in that, The amount of collector used in the flotation process is 30-70 mg / L.

7. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 6, characterized in that, The amount of collector used in the flotation process is 40-50 mg / L.

8. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 3, characterized in that, The temperature of the flotation slurry is 15–40°C.

9. The method for promoting the flotation separation of iron ore and associated iron-bearing silicates according to claim 3, characterized in that, The iron-bearing silicate gangue includes at least one of chlorite, aegirine, quartz and feldspar, and the iron ore is refined iron ore.

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